Light module of a motor vehicle light, with several semiconductor light sources arranged side by side on a straight line and controllable individually or in groups.

Abstract

Light module (10) of a motor vehicle lamp, with several semiconductor light sources (3) arranged side by side on a straight line (14) and controllable individually or in groups for emitting light, for realizing at least one lighting function, characterized in that the light module (10) has a reflector (11) with a reflective surface for deflecting light into a light emission direction (2) of the light module (10), and that each of the semiconductor light sources (3) is assigned at least one focusing optic (12), which is configured to focus at least a part of the light emitted by the semiconductor light source (3) into a light strip (13), wherein the light strips (13) generated by the individual semiconductor light sources (3) in conjunction with the respective assigned focusing optics (12) lie side by side and strike at least a part of the reflective surface, and the reflective surface is designed such that it,possibly in conjunction with other optically effective elements arranged in the beam path, deflects the light (25) of the light strips (13) into light rays (26) that run parallel to each other and parallel to the direction of light emission (2), wherein the at least one focusing optic (12) comprises a lens element (18) which is configured as a sector of an imaginary body of revolution formed by rotating an imaginary base surface of revolution (19) about an axis of rotation (20), wherein the base surface of revolution (19) is configured such that the lens element (18) has a light-entry surface (21) facing the axis of rotation (20) and curving about the axis of rotation (20), and a light-emission surface (22) located radially outside with respect to the axis of rotation (20).

Description

The present invention relates to a light module of a motor vehicle lamp, having a plurality of semiconductor light sources, which are arranged next to one another on a straight line and can be controlled individually or in groups, for emitting light, for realizing at least one lamp function.DE 10 2011 119 230 A1 discloses a generic light module of a motor vehicle lamp in the form of a flashing lamp having a multiplicity of light-emitting diodes (LEDs) arranged next to one another and drivable in groups for realizing a dynamic lamp function, in particular a so-called wiping flashing indicator. This publication is a departure from illustrating the intended change of direction of travel by a suitable switching-on process of the LEDs or LED groups of a rod-shaped luminaire arranged in the vehicle with a horizontal longitudinal extent. If this illustration is not required, a function produced under the usual design freedom can be used instead of a horizontally lying rod-shaped luminaire.Furthermore, DE 10 2012 214 138 A1 discloses a light module having a focusing optics designed as a lens element, which focuses light emitted by a light source designed as an LED into a fan-like, strip-shaped primary light distribution, which is in turn directed onto at least one reflector in order to deflect the primary light distribution into an emission light distribution of the light module, which illuminates at least one strip-like, semicircle-like or ring-like surface.In addition, FIG. 1 shows a light-emitting diode which is arranged at a focal point of a reflector designed as a paraboloid of revolution and whose emitted light therefore runs parallel to its axis after reflection at the paraboloid. A downstream lens converts the parallel light beam into a light distribution predefined by the legislator or by the manufacturer of a motor vehicle into which the luminaire is installed. FIG. 2 shows the luminance that a viewer sees from outside the luminaire when looking into the luminaire from FIG. 1 counter to a light emission direction. It is evident that the luminance is not constantly homogeneous, as the horizontal and vertical sections arranged at the top and bottom show through the luminance maximum. The problem with this flashing lamp is thus the homogeneity of the luminance which is capable of improvement and which has relatively great local fluctuations. The horizontal and vertical sections pass through the point of highest luminance and have a ratio of the highest to the lowest value of approximately 8:1, for example in the vertical section. Taking account of the reflector corners, there are even poorer conditions, since the luminance is particularly weak there.Proceeding from the described prior art, the object of the present invention is to configure and further develop a known motor vehicle lamp such that it realizes at least one lamp function with a particularly good homogeneity of the luminance. Furthermore, a dynamic lamp function, for example in the form of a wiping flasher similar to that described in DE 10 2011 119 230 A1, is intended to be able to be realized with the lamp. Finally, it would be desirable to be able to realize a plurality of different lamp functions from a single reflector of the lamp. The document DE 10 2013 104 176 A1 discloses a lighting device for vehicles with an elongated light guide.These and other objects are achieved by the light module of a motor vehicle lamp according to claim 1. In particular, it is proposed that the light module has a reflector with a reflection surface for deflecting light in a light exit direction of the light module, and that each of the semiconductor light sources is assigned at least one focusing optics, which is respectively designed to focus at least a part of the light emitted by the semiconductor light source to form a light strip, wherein the light strips generated by the individual semiconductor light sources in cooperation with the respectively assigned focusing optics strike at least a part of the reflection surface lying next to one another, and the reflection surface is designed such that, possibly in cooperation with other optically active elements arranged in the beam path, it deflects the light of the light strips into light beams which run parallel to one another and parallel to the light exit direction, wherein the at least one focusing optics comprises a lens element, which is formed as a sector of an imaginary rotational body formed by rotation of an imaginary rotational base surface about an axis of rotation, wherein the rotational base surface is formed in such a way that the lens element has a light entry surface facing the axis of rotation and bulging about the axis of rotation and a light exit surface lying radially outwards with respect to the axis of rotation.In the sense of the present invention, it is proposed to arrange a plurality of light sources designed as light emitting diodes (LEDs) next to one another on a straight line on a horizontal plane and focusing optics assigned to the LEDs in each case. The straight line on which the LEDs are arranged preferably coincides with an axis of a circular cone, the axis of symmetry of which lies on the horizontal plane. The focusing optics are preferably designed as lens elements which are known per se from DE 10 2012 214 138 A1. With regard to the configuration and mode of operation of the focusing optics, express reference is made to this publication. Particularly preferably, the rotational base surface of a focusing optics configured as a lens element is configured mirror-symmetrically to a base symmetry axis, wherein the base symmetry axis is perpendicular to the rotational axis and intersects the latter in an optical center, wherein the semiconductor light sources are arranged in the optical center of the focusing optics respectively assigned to them.A reflector is also provided which converts light beams (in planes containing the axis, the light beams of the light beams are parallel) emerging from the focusing optics into light beams, the entire light beams of which run parallel to the axis of symmetry of the circular cone. The focusing optics concentrate the light emitted from the LEDs, respectively, and direct it onto the reflective surface of the reflector. The reflector preferably has a rectangular shape as viewed along the axis of symmetry of the circular cone. The axis of symmetry preferably extends in the 0° / 0° direction (horizontal / vertical on a measuring screen arranged at a distance from the lighting device), which corresponds to the direction of travel in the case of headlight lights and extends counter to the direction of travel in the case of tail lights. In particular, it is proposed that the reflector has at least one reflector zone which is designed as a section of the surface of a rotationally symmetrical, imaginary, assigned circular cone, wherein an axis of symmetry of the circular cone runs parallel to the axis of rotation of the lens element.The generation of a legally predefined light distribution of the generated luminaire function can be achieved by scattering facets on the reflection surface of the reflector or by a scattering pane arranged downstream of the reflector in the beam path of the reflected light.The light module according to the invention is designed to implement a dynamic lighting function, for example a wiping flasher, by the semiconductor light sources being activated one after the other individually or in groups. If, according to a further development, the LEDs are not simultaneously switched on, but rather are successively cumulatively switched on, the reflector is illuminated piece by piece. Cumulative in this context means that when an LED is switched on, the previously switched-on LEDs remain switched on, so that all LEDs are switched on at the end of the switching-on process. The cumulative switching on of the LEDs is preferably carried out in less than 1 second, particularly preferably in about 100 ms to 200 ms. The LEDs of the light module are therefore not all switched on together abruptly, but rather cumulatively during the switching-on process. At the end of the switch-on process, the LEDs remain switched on for a predefined period of time, which is in the range from 50 ms to 400 ms, preferably in the range from 200 ms to 300 ms. In this way, for example, a wiping flasher can be realized which is particularly conspicuous to the human eye and is recognized by an observer as a clear change of travel direction display.The homogeneity of the illumination of a surface illuminated by the light module or the luminaire can be improved by using LEDs which emit different light fluxes. Furthermore, it is possible to use LEDs which emit light of different colors in order to be able to generate different lamp functions.In the case where the LEDs emit the same luminous flux, the maximum brightness differences of the luminance distribution of the light deflected by the reflector are below a ratio of 2:1, which can just be perceived by a skilled observer. The homogeneity is thus substantially improved compared to the prior art. A further increase in homogeneity is achieved if the LEDs emit different light currents. In particular in a vertical section, the resulting luminance values are practically constant. For example, in five LEDs arranged side by side on the straight line, the LED placed closest to the cone tip on the straight line outputs a relative luminous flux of 4 units, and the following have a relative luminous flux of, for example. 5, 6, 7 and an LED disposed furthest from the cone tip have a relative luminous flux of 8 units.In the case where only one central LED or a plurality of central LEDs arranged next to one another are in operation and emit light, the resulting light distribution of the light module or of the luminaire forms a "luminous circular ring sector". In the case where one of the LEDs is always in operation and the adjacent one is not in operation alternately, a plurality of "luminous circular ring sectors" are produced which are arranged one above the other in the manner of the colors of a rainbow, with significantly darker regions (resulting from the LEDs not in operation) being recognizable between the individual "luminous circular ring sectors". With a larger number of reduced focusing optics or lenses, these dark areas can be eliminated, so that a homogeneous appearance results even if only every other LED lights up. This results in the possibility of selecting a different color of light for the LEDs lying therebetween. This in turn means the possibility of generating two light functions of different colors from one reflector (e.g. in a headlight: flashing light yellow and daytime running light white; or in a tail light: tail light red and flashing light yellow) or, in the case of the tail light, two functions of greatly different brightness (e.g. tail light and stop light) by combining a group of weak LEDs (red for tail light) with a group of strong LEDs. The braking function may be generated by the group of the strong LEDs alone or in combination with the group of the weak LEDs. Advantageously, the arrangement of semiconductor light sources configured to emit light of a first color changes on the straight line with other semiconductor light sources that emit light of a second color different from the first.Since individual illuminated regions of a light distribution can be achieved by means of the light module according to the invention of a motor vehicle lamp, the light module or the lamp can be used to produce effects as described, for example, in DE 10 2015 218 129 A1. This comprises, for example, when activating a plurality of LEDs, simultaneously a variation of the light intensity of the light emitted by the individual LEDs, wherein the sum of the varying light intensities is always constant over time. In this sense, it is proposed that the at least one lamp function is a dynamic lamp function in which the semiconductor light sources can be controlled individually or in groups in order to vary the light intensity of the light emitted by the semiconductor light sources that can be controlled individually or in groups during the implementation of the lamp function.In the example described, in which only some of the LEDs are in operation or the LEDs generate light of different colors or emit different light currents, the individual regions of the light distribution operated by different LEDs can be clearly separated from one another and thus, for example, to produce a "wiping flasher" by successive switching on of the LEDs, light up one after the other. The light module or the luminaire is thus particularly well suited for implementing a dynamic luminaire function.According to an alternative embodiment of the invention, it is proposed that the straight line on which the semiconductor light sources are arranged runs in a horizontal plane of the light module and is oriented perpendicular to the light exit direction. The semiconductor light sources are thus arranged on a straight line which runs perpendicular to the axis of the circular cone and thus perpendicular to the 0° / 0° direction. In this case, the system would be "two-dimensional" because it is identical in each section which runs perpendicular to the straight line on which the LEDs are arranged, except for a radius of the focusing optics formed as lens elements. The reflector that generates light parallel to the 0° / 0° direction is a cylindrical paraboloid (or a parabolic cylinder) when the straight line on which the LEDs are arranged, and thus the LEDs or the centers of the focusing optics, coincides with a focal line of the reflector.According to another embodiment of the invention, it is also conceivable to arrange the focusing optics on a straight line which has an angle between 0° and 90° with respect to the 0° / 0° direction. In this sense, it is proposed that the straight line on which the semiconductor light sources are arranged extends in a horizontal plane of the light module and is aligned obliquely with respect to the light exit direction. The reflection surface parallelizing in the 0° / 0° direction is then obtained by the wavefront method known from geology, which is here very much simplified, since only "a reflective layer" surrounded on both sides by the same medium (air) has to be calculated. As a solution to the wavefront method, in this case, general cylindrical surfaces are obtained. All reflector points are located on straight lines which again meet in a cone tip. The cone tip lies on the straight line on which the LEDs are arranged.Instead of using a reflection surface which generates parallel light beams which are in turn converted into a legally prescribed light distribution by an additional diffusing screen arranged in the beam path or by diffusing facets on the reflection surface, it is also possible to choose "any" reflection surface on which prismatic surfaces are then placed which in turn parallelize the light. The prismatic surfaces are perpendicular to the bisector between a light beam arriving at the location of the prismatic surface and the beam reflected in the 0° / 0° direction and are configured to be planar or slightly curved, so that each light beam is reflected exactly in the 0° / 0° direction on the prism surface. It is advantageous for the reflection surface if it is designed in such a way that the reflected light beams do not have too great deviations from parallelism. To generate the legal light distribution, additional scattering surfaces can be placed on the prism surfaces or a separate scattering disk is introduced again into the beam path downstream of the reflection surface.Further features and advantages of the present invention are explained in more detail below with reference to the figures. The following are shown: FIG. 1 shows a light module of a motor vehicle light known from the prior art; FIG. 2 shows a surface illuminated by the light module from FIG. 1 with the corresponding luminance in a horizontal and a vertical section; FIG. 3 shows a light module according to the invention of a motor vehicle lamp according to a preferred embodiment; FIG. 4 shows a light module according to the invention of a motor vehicle lamp according to another preferred embodiment; FIG. 5 shows a light module according to the invention of a motor vehicle lamp according to a further preferred embodiment; FIG. 6 shows a luminance which a viewer sees from outside the luminaire when looking into the luminaire counter to a light emission direction, and a horizontal and a vertical section, wherein semiconductor light sources of the light module all emit the same luminous flux; FIG. 7 shows a luminance which a viewer sees from outside the luminaire when looking into the luminaire counter to a light emission direction, and a horizontal and a vertical section, wherein semiconductor light sources of the light module emit different light fluxes; FIG. 8 ashows a luminance realized by the light module from FIG. 3 when only at least one middle semiconductor light source of the light module is activated; FIG. 8 bshows a luminance realized by the light module from FIG. 3 when only every other one of the semiconductor light sources of the light module is activated; FIG. 9 shows a light module according to the invention of a motor vehicle lamp in a vertical section according to another preferred embodiment; FIG. 10 shows a light module according to the invention of a motor vehicle lamp in a vertical section according to a further preferred embodiment; and FIG. 11 shows one of a plurality of focusing optics of a light module according to the invention.The present invention relates to a motor vehicle lamp having a plurality of semiconductor light sources which are arranged next to one another on a straight line and can be controlled individually or in groups. These emit light in each case in order to realize at least one lighting function. The luminaire can be a component of a headlight, a tail lamp or a side lamp and can be integrated into a housing of the headlight or of the tail or side lamp. However, the luminaire can also have its own housing and be arranged as a separate luminaire at any desired location in or on the motor vehicle.FIG. 1 shows a light module 1 of a motor vehicle light known from the prior art. The light module 1 is arranged in a housing of a headlight or a rear or side light or in its own housing of the light. The housing is not shown in the figures. It has a light exit opening (not shown) closed by a transparent cover pane, through which light beams formed by the light module 1 pass for realizing a predefined light distribution of the desired luminaire function in the light exit direction 2. The known light module 1 comprises a light emitting diode 3, which is arranged at a focal point of a reflector 4 designed as a paraboloid of revolution and whose emitted light thus runs parallel to its axis after reflection at the paraboloid. A downstream lens 5 converts the parallel light beam into a light distribution predefined by the legislator or by the manufacturer of the motor vehicle into which the luminaire is installed.FIG. 2 shows an appearance of the known luminaire equipped with the light module 1 from FIG. 1. Clearly visible are the strong fluctuations in the luminance which a viewer sees from outside the luminaire when looking into the luminaire counter to a light emission direction 2. By means of a horizontal section above the appearance and a vertical section to the right next to the appearance, the variations in luminance can be seen. Thus, the problem with the known luminaire is the homogeneity of the luminance, which exhibits relatively strong local fluctuations. The horizontal and vertical sections pass through the point of highest luminance and have a ratio of the highest to the lowest value of approximately 8:1, for example in the vertical section. Taking account of the reflector corners, there are even poorer conditions, since the luminance is particularly weak there.FIG. 3 shows an example of a light module 10 of a luminaire according to the invention. The light module 10 is arranged in a housing of a headlight or a rear or side light or in its own housing of the light. The housing is not shown in the figures. It has a light exit opening closed by a transparent cover pane (likewise not shown), through which light beams formed by the light module 10 pass for realizing a predefined light distribution of the desired luminaire function in the light exit direction 2. The known light module 1 comprises a plurality of semiconductor light sources 3, which are designed, for example, as light-emitting diodes (LEDs). The light module 10 comprises a reflector 11 with a reflection surface for deflecting light in the light outlet direction 2 of the motor vehicle lamp. Each of the semiconductor light sources 3 is assigned a focusing optics 12, which is each designed to focus at least a portion of the light emitted by the semiconductor light source 3 assigned to it to form a light strip 13, wherein the light strips 13 generated by the individual semiconductor light sources 3 in cooperation with the focusing optics 12 assigned in each case strike at least a portion of the reflection surface of the reflector 11 lying next to one another. The reflection surface is configured such that, possibly in cooperation with other optically active elements arranged in the beam path, it deflects the light of the light strips 13 into light beams which run parallel to one another and parallel to the light exit direction 2 (0° / 0° direction).In the context of the present invention, it is proposed to arrange a plurality of semiconductor light sources 3 designed as light-emitting diodes (LEDs) next to one another on a straight line 14 on a horizontal plane and the focusing optics 12 assigned to the semiconductor light sources 3, in each case. FIG. 3 shows a view into a circular cone 15, the axis of symmetry 16 of which runs through the tip of the cone 17. The axis 16 preferably extends in the 0° / 0° direction (horizontal / vertical on a measuring screen arranged at a distance from the luminaire) or in the light outlet direction 2, which corresponds to the direction of travel in the case of headlight luminaires and extends counter to the direction of travel in the case of tail luminaires. In the example shown, five semiconductor light sources 3 are provided next to one another on the straight line 14 and a corresponding number of focusing optics 12. Of course, the number of light sources 3 and the focusing optics 12 can differ from the number shown here. In the example shown, the straight line 14, on which the semiconductor light sources 3 are arranged, coincides with the axis of symmetry 16 of a circular cone 15 which lies in the horizontal plane.The focusing optics 12 are preferably designed as lens elements which are known per se from DE 10 2012 214 138 A1. With regard to the configuration and mode of operation of the focusing optics 12, express reference is made to this publication. In this sense, it is proposed that the at least one focusing optical unit 12 comprises a lens element 18 (cf. FIG. 11 ) which is formed as a sector of an imaginary rotational body formed by rotation of an imaginary rotational base surface 19 about an axis of rotation 20, wherein the rotational base surface 19 is formed in such a way that the lens element 18 has a light entry surface 21 facing the axis of rotation 20 and bulging about the axis of rotation 20 and a light exit surface 22 lying radially on the outside with respect to the axis of rotation 20. The axis of rotation 20 preferably coincides with the straight line 14 on which the semiconductor light sources 3 are arranged. In the example of FIG. 3, the axis of rotation 20 additionally coincides with the axis of symmetry 16 of the circular cone 15. Particularly preferably, the rotational base surface 19 of the focusing optics 12 configured as a lens element 18 is configured mirror-symmetrically to a mirror plane running through a base symmetry axis 23 and the rotational axis 20, wherein the base symmetry axis 23 is perpendicular to the rotational axis 20 and intersects it in an optical center 24. The semiconductor light sources 3 are arranged in the optical center 24 of the focusing optics 12 assigned to them.The focusing optics concentrate the light emitted by the semiconductor light sources 3 in each case and direct it onto the reflection surface of the reflector 11. In planes which contain the axis of symmetry 16 of the circular cone 15 or, in the example of FIG. 3, the straight line 14, the light beams 25 generated by the focusing optics 12 are parallel (cf. FIG. 11 ). The reflector 11 converts light beams with the parallel light beams 25 which emerge from the focusing optics 12 into light beams 26, the light beams of which run parallel to the axis of symmetry 16 of the circular cone 15 (cf. FIG. 3 ). The reflector 11 preferably has a rectangular shape as viewed along the axis of symmetry 16 (viewing direction opposite to the light emission direction 2). In particular, it is proposed that the reflector 11 has at least one reflector zone 27, 28, 29 (cf. FIGS. 9 and 10 ) which is designed as a section of the surface of a rotationally symmetrical, imaginary, assigned circular cone, wherein the axis of symmetry 16 runs parallel to the axis of rotation 20 of the lens element 18.The generation of a legally predefined light distribution of the realized luminaire function can be achieved by scattering facets on the reflection surface of the reflector 11 or by a scattering pane (not shown) arranged downstream of the reflector 11 in the beam path of the reflected light beams 26.The luminaire according to the invention is designed to implement a dynamic luminaire function, for example a wiping flasher, in that the semiconductor light sources 3 are activated one after the other individually or in groups. When the semiconductor light sources 3 are turned on cumulatively, rather than simultaneously, the reflector 11 is illuminated piece by piece. Cumulative in this context means that when a semiconductor light source 3 is switched on, the previously switched-on semiconductor light sources 3 remain switched on, so that all semiconductor light sources 3 are switched on at the end of the switching-on process. The cumulative switching on of the semiconductor light sources 3 is preferably carried out in less than 1 second, particularly preferably in about 100 ms to 200 ms. The semiconductor light sources 3 of the luminaire are therefore not all switched on together abruptly, but rather cumulatively during the switching-on process. At the end of the switch-on process, the semiconductor light sources 3 remain switched on for a predefined period of time, which is in the range from 50 ms to 400 ms, preferably in the range from 200 ms to 300 ms. In this way, for example, a wiping flasher can be realized which is particularly conspicuous to the human eye and is recognized by an observer as a clear change of travel direction display.In the case where all semiconductor light sources 3 emit the same luminous flux, the maximum brightness differences of the luminance distribution of the light deflected by the reflector 11 are below a ratio of 2:1, which can just be perceived by a skilled observer. This is shown in FIG. 6. The homogeneity is thus substantially improved compared to the prior art. A further increase in homogeneity is achieved if the LEDs emit different light currents. This is shown in FIG. 7. In particular in a vertical section, the resulting luminance values are practically constant. In the case of, for example, five semiconductor light sources 3 arranged next to one another on the straight line 14, the semiconductor light source 3 placed closest to the cone tip 17 on the straight line 14 emits a relative luminous flux of 4 units, and the following semiconductor light sources 3 emit a relative luminous flux of, for example. 5, 6, 7 and a semiconductor light source 3 disposed furthest from the cone tip 17 have a relative luminous flux of 8 units. In this way, a particularly homogeneous appearance of the luminaire can be achieved. FIGS. 6 and 7 also each show the appearance of a luminaire according to the invention, wherein a horizontal section above the appearance and a vertical section to the right next to the appearance are shown.In the case where only one middle semiconductor light source 3 (cf. for example. FIG. 3 ) or a plurality of middle semiconductor light sources 3 arranged next to one another are in operation and emit light, the resulting light distribution of the luminaire forms a "luminous circular ring sector" 30. This is also shown in FIG. 8a as the appearance of the luminaire. In the case where one of the semiconductor light sources 3 is always in operation and the adjacent one is not in operation alternately, a plurality of "luminous circular ring sectors" 30.1, 30.2, 30.3 are produced, which are arranged one above the other in the manner of the colors of a rainbow, wherein significantly darker regions (resulting from the LEDs not in operation) can be recognized between the individual "luminous circular ring sectors" (cf. FIG. 8 b ). With a larger number of reduced focusing optics 12 or lens elements 18, these dark areas can be eliminated, so that a homogeneous appearance results even when only every second semiconductor light source 3 lights up. This makes it possible to generate two light functions of different colors from one reflector 11 (e.g. in a headlight: flashing light yellow and daytime running light white; or in a tail light: tail light red and flashing light yellow) or in the case of the tail light two functions of greatly different brightness (e.g. tail light and stop light both red) by combining a group of weak semiconductor light sources 3 (red for tail light) with a group of strong semiconductor light sources 3. The braking function may be generated by the group of the weak semiconductor light sources 3 alone or in combination with the group of the weak semiconductor light sources 3. Advantageously, the arrangement of semiconductor light sources 3 which are designed to emit light of a first color changes on the straight line 14 with other semiconductor light sources 3 which emit light of a second color different from the first.In the example described, in which only some of the semiconductor light sources 3 are in operation or the semiconductor light sources 3 generate light of different colors or emit different light fluxes, the individual regions 30 of the light distribution operated by different semiconductor light sources 3 can be clearly separated from one another and thus, for example, to produce a "wiping flasher" by switching on the semiconductor light sources 3 successively, light up one after the other. The luminaire is therefore particularly well suited for implementing a dynamic luminaire function.Since individual illuminated regions of a light distribution can be achieved by means of the luminaire according to the invention, the luminaire can be used to produce effects as described, for example, in DE 10 2015 218 129 A1. This comprises, for example, when a plurality of semiconductor light sources 3 are activated, simultaneously a variation of the light intensity of the light emitted by the individual semiconductor light sources 3, wherein the sum of the varying light intensities is always constant over time. In this sense, it is proposed that the at least one lamp function is a dynamic lamp function in which the semiconductor light sources 3 can be controlled individually or in groups in order to vary the light intensity of the light emitted by the semiconductor light sources 3 that can be controlled individually or in groups during the implementation of the lamp function, wherein the sum of the varying light intensities of all semiconductor light sources 3 is always constant over time.According to an alternative embodiment from FIG. 4, it is proposed that the straight line 14, on which the semiconductor light sources 3 are arranged, runs in a horizontal plane of the luminaire and is oriented perpendicularly to the light emission direction or to the 0° / 0° direction. In this case, the system would be "two-dimensional", since it is identical in each section, which runs perpendicular to the straight line 14 on which the semiconductor light sources 3 are arranged, except for a radius of the focusing optics 12 formed as lens elements 18. The reflector 11 which generates light parallel to the 0° / 0° direction or in the light exit direction 2 is a cylindrical paraboloid (or a parabolic cylinder), wherein the straight line 14 on which the semiconductor light sources 3 are arranged and thus the semiconductor light sources 3 or the centers of the focusing optics 12 coincide with a focal line of the reflector 11. The reflector zones 27, which are illuminated by light from the light strips 13 of the individual focusing optics 12, are located next to one another on the reflection surface of the reflector 11 and have a strip-shaped extension. In the example of FIG. 4, they are oriented vertically when viewed counter to the light emission direction 2. In this case, a reflector zone 27.1 is illuminated by the light bundled by the focusing optics 12.1, an adjacent reflector zone 27.2 by the light bundled by the adjacent focusing optics 12.2, and so on.According to another embodiment from FIG. 5, it is also conceivable to arrange the focusing optics 12 on a straight line 14 which has an angle between 0° and 90° with respect to the 0° / 0° direction (or the light exit direction 2). In this sense, it is proposed that the straight line 14, on which the semiconductor light sources 3 are arranged, runs in a horizontal plane of the luminaire and is aligned obliquely with respect to the light emission direction 2. In a further generalization, the straight line 14 could also not extend in the horizontal plane. The reflection surface of the reflector 11 parallelizing in the 0° / 0° direction is then obtained in this case by the wavefront method known from geology, which can be simplified very greatly here, since only "a reflective layer" surrounded on both sides by the same medium (air) has to be calculated. As a solution to the wavefront method, in this case, general cylindrical surfaces are obtained. All reflector points are located on straight lines which again meet in a cone tip 17. The cone tip 17 lies on the straight line 14 on which the semiconductor light sources 3 are arranged.Instead of using a reflecting surface which generates parallel light beams which are in turn converted into a legally prescribed light distribution by an additional diffusing screen arranged in the beam path or by diffusing facets on the reflecting surface of the reflector 11, it is also possible to choose "any" reflecting surface on which prismatic surfaces are then placed which in turn parallelize the light. The prismatic surfaces are perpendicular to the bisector between a light beam arriving at the location of the prismatic surface and the beam reflected in the 0° / 0° direction and are configured to be planar or slightly curved, so that each light beam is reflected exactly in the 0° / 0° direction on the prism surface. It is advantageous for the reflection surface of the reflector 11 if it is designed in such a way that the reflected light beams do not have too great deviations from parallelism. To generate the legal light distribution, additional scattering surfaces can be placed on the prism surfaces or a separate scattering disk is introduced again into the beam path downstream of the reflector 11.

Claims

Light module (10) of a motor vehicle lamp, having a plurality of semiconductor light sources (3) which are arranged next to one another on a straight line (14) and can be controlled individually or in groups for emitting light, for realizing at least one lamp function, characterized in that the light module (10) has a reflector (11) having a reflection surface for deflecting light in a light outlet direction (2) of the light module (10), and in that each of the semiconductor light sources (3) is assigned at least one focusing optical unit (12) which is in each case designed to focus at least part of the light emitted by the semiconductor light source (3) to form a light strip (13), wherein the light strips (13) generated by the individual semiconductor light sources (3) in cooperation with the respectively assigned focusing optical units (12) strike at least part of the reflection surface lying next to one another, and the reflection surface is designed such that it is configured in such a way that it emits light in a direction which the light beams from the individual semiconductor light sources (3) are incident, in cooperation with the respectively assigned focusing optical units (12), in each case, in a manner lying next to one another, Optionally in cooperation with other optically active elements arranged in the beam path, which deflects light (25) of the light strips (13) into light beams (26), which run parallel to one another and parallel to the light exit direction (2), wherein the at least one focusing optics (12) comprises a lens element (18), which is formed as a sector of an imaginary rotational body formed by rotation of an imaginary rotational base surface (19) about an axis of rotation (20), wherein the rotational base surface (19) is formed such that the lens element (18) has a light entry surface (21) facing the axis of rotation (20) and bulging about the axis of rotation (20) and a light exit surface (22) lying radially outside with respect to the axis of rotation (20).Light module (10) according to Claim 1, characterized in that the straight line (14) on which the semiconductor light sources (3) are arranged runs in a horizontal plane of the light module (10) and is oriented parallel to the light exit direction (2).Light module (10) according to Claims 1 and 2, characterized in that the reflector (11) has at least one reflector zone (27) which is designed as a section of the surface of a rotationally symmetrical, imaginary, assigned circular cone (15), wherein an axis of symmetry (16) of the circular cone (15) runs parallel to the axis of rotation (20) of the lens element (18).Light module (10) according to Claim 1, characterized in that the straight line (14) on which the semiconductor light sources (3) are arranged runs in a horizontal plane of the light module (10) and is oriented perpendicularly to the light exit direction (2).Light module (10) according to claim 4, characterised in that the reflector (11) is formed as a cylindrical paraboloid or a parabolic cylinder with a focal line and the straight line (14) coincides with the focal line.Light module (10) according to Claim 1, characterized in that the straight line (14) on which the semiconductor light sources (3) are arranged runs in a horizontal plane of the light module (10) and is aligned obliquely with respect to the light exit direction (2).Light module (10) according to Claim 6, characterized in that the reflection surface of the reflector (11) which parallelises in the light exit direction (2) is calculated according to a simplified wavefront method, in which the reflection surface is calculated as only one reflective layer which is surrounded on both sides by the same medium air.Light module (10) according to one of the preceding claims, characterized in that the semiconductor light sources (3) comprise light-emitting diodes (LEDs).Light module (10) according to one of the preceding claims, characterized in that the semiconductor light sources (3) are designed to emit light of different colour.Light module (10) according to Claim 9, characterized in that the arrangement of semiconductor light sources (3) which are designed to emit light of a first colour alternates on the straight line (14) with other semiconductor light sources (3) which emit light of a second colour which differs from the first.Light module (10) according to one of the preceding claims, characterized in that the semiconductor light sources (3) are designed to emit light of different light fluxes.Light module (10) according to one of the preceding claims, characterized in that at least one lighting function is a dynamic lighting function in which the semiconductor light sources (3) can be controlled individually or in groups in order to vary the light intensity of the light emitted by the semiconductor light sources (3) which can be controlled individually or in groups during the implementation of the lighting function.The light module (10) of claim 12, characterized in that the dynamic light function is a wiping flasher.Light module (10) according to one of the preceding claims, characterized in that the reflection surface is provided at least in regions with scattering facets and / or a scattering disc is arranged in the beam path of the light beams (26) reflected by the reflector (11).Light module (10) according to Claim 1, characterized in that the rotational base surface (19) of the lens element (18) is formed mirror-symmetrically with respect to a mirror plane running through a base symmetry axis (23) and the rotational axis (20), wherein the base symmetry axis (23) is perpendicular to the rotational axis (20) of the lens element (18) and intersects the latter in an optical centre (24), wherein the semiconductor light sources (3) are arranged in the optical centre (24) of the focusing optics (12) assigned to them in each case.

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