Abstract: A motor vehicle headlight, that includes a main-light module that provides a dipped main-light function having a mainly horizontal cut-off line and a secondary light module that provides two individually controllable light functions: one main-light function and one less powerful additional light function. The dipped main-light function of the main-light module is activated in conjunction with the additional light function of the secondary light module, such that the at least one secondary light module appears to be illuminated approximately as brightly as the main-light module. The secondary light module has a light guide plate into which light is coupled that propagates in the light guide plate using total reflection, and the light guide plate has output elements for outputting the propagating light from the light guide plate. The light output of the light guide plate illuminates an area above the cut-off line of the dipped main-light function of the main-light module.

Abstract: A motor vehicle headlight, that includes a main-light module that provides a dipped main-light function having a mainly horizontal cut-off line and a secondary light module that provides two individually controllable light functions: one main-light function and one less powerful additional light function. The dipped main-light function of the main-light module is activated in conjunction with the additional light function of the secondary light module, such that the at least one secondary light module appears to be illuminated approximately as brightly as the main-light module. The secondary light module has a light guide plate into which light is coupled that propagates in the light guide plate using total reflection, and the light guide plate has output elements for outputting the propagating light from the light guide plate. The light output of the light guide plate illuminates an area above the cut-off line of the dipped main-light function of the main-light module.

Abstract: The light of luminous units known in prior art is laterally radiated, wherefore LEDs (10 to 13) have to be arranged in an inclined manner on separate sheet metal supports, conductor films, or printed circuit boards. Using such supports and fastening the LEDs (10 to 13) is technically complex and costly. In order to be able to arrange the laterally radiating luminous means (10 to 13) in a simple, low-cost manner without using any additional supports, said luminous means (10 to 13) is provided with a fully reflecting surface (14), on which the beams (S) are reflected towards a reflector (3) that reflects the beams (S) in the direction of a light disk (2). The fully reflecting surface (14) can be arranged according to specific requirements in such a way that the light falls in the desired direction. No additional supports are required. The inventive luminous unit is preferably used in sideview mirrors of motor vehicles but can also be used in all areas of signal technology and illumination engineering.