| CPC F21S 41/24 (2018.01) [F21S 41/143 (2018.01); F21S 41/255 (2018.01); F21S 41/663 (2018.01); F21S 41/68 (2018.01); F21W 2102/145 (2018.01)] | 13 Claims |
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1. An illumination device (10) for a motor vehicle headlight for producing segmented full beam distribution (FL), wherein the full beam distribution (FL) has a first and a second maximum illuminance (M1, M2), which are designed and arranged in the full beam distribution (FL) in such a way that an intersection HV of the horizontal line H-H and the vertical line V-V of an aiming screen for measuring a light distribution is arranged within an isolux line for 80% of the maximum illuminance of the full beam distribution (FL), wherein the illumination device (10) comprises:
a plurality of light sources (50);
an optical element (100), comprising a base body (110) and a plurality of light guiding bodies (200) protruding from the base body (110) for forming the segmented full beam distribution (FL) from the light of the plurality of light sources (50), which light guiding bodies (200) respectively have a light entry surface (210), into which light can be fed from the light sources (50), wherein at least one light source of the plurality of light sources (50) is respectively associated with the entry surface (210), and an exit surface (220), from which exit surface (220) light that can be fed into the respective light guiding body (200) exits, wherein the exit surfaces (220) of adjacent light guiding bodies (200) are directly adjacent to one another and form a common exit surface (220a) of the optical element (100), wherein the light guiding bodies (200) of the optical element (100) are arranged in at least one row along a straight line (G); and
projection optics (300) arranged downstream of the beam path of the optical element (100) having an optical axis (A), which projection optics (300) are designed to project the light exiting from the common exit surface (200a) in front of the illumination device (10) in the direction of a main emission direction (X), wherein the optical axis (A) of the projection optics (300) intersects the intersection HV, and wherein the optical axis (A) is parallel to the main emission direction (X) of the illumination device (10),
wherein a first and second virtual axis (y, z) are arranged orthogonally to the main emission direction (X), wherein the first and second virtual axis (y, z) are also aligned orthogonally to one another, wherein the illumination device (10) is configured to be installed in a motor vehicle headlight such that the first axis (y) is arranged in a horizontal plane and the second axis (z) is arranged in a vertical plane,
wherein when the illumination device (10) is installed in the motor vehicle headlight, each light guiding body (200) has two lateral side surfaces (230a, 230b) and an upper and a lower side surface (240a, 240b), which side surfaces (230a, 230b, 240a, 240b) extend from the entry surface (210) in the direction of the common exit surface (220a) and delimit the light guiding body (200) at least in sections,
wherein the optical element (100) has a first and a second light emission half (L1, L2), which, when the illumination device (10) is installed in the motor vehicle headlight, can be delimited from one another by a virtual vertical plane (VE), which runs through the optical element (100) and in which vertical plane (VE) the optical axis (A) of the projection optics (300) lies, wherein the first light emission half (L1) is arranged on a first side (S1) of the virtual vertical plane (VE), and wherein the second light emission half (L2) is arranged on a second side (S2) opposite the first side (S1),
wherein a first light guiding body (200a) of the first light emission half (L1), which is directly adjacent to the virtual vertical plane (VE), produces the first maximum illuminance (M1) of the full beam distribution (FL),
wherein a first light guiding body (200b) of the second light emission half (L2), which is directly adjacent to the virtual vertical plane (VE), produces the second maximum illuminance (M2) of the full beam distribution (FL),
wherein the entry surfaces (210) of these first light guiding bodies (200a, 200b) respectively have an offset from the corresponding exit surface (220) such that the surface centre (FM2) of the entry surface (210) has a horizontal offset (H-off), directed away from the virtual vertical plane (VE), along the first axis (y), which runs orthogonally to the virtual vertical plane (VE), and a downwards vertical offset (V-off) along the second axis (z) to the surface centre (FM1) of the associated exit surface (220), and
wherein the lateral side surface (230a) of these first light guiding bodies (200a, 200b), which faces away from the virtual vertical plane (VE), is convex and combined with the offset of the entry surfaces (210) is designed to direct light from the corresponding light source (50) in the direction of the optical axis (A) in order to increase the illuminance between the first and the second maximum illuminance (M1, M2) in the full beam distribution (FL) such that the intersection HV of an aiming screen is arranged within the isolux line for 80% of the maximum illuminance of the full beam distribution (FL).
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