| CPC B62J 6/023 (2020.02) [F21S 41/24 (2018.01)] | 17 Claims |
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1. An illumination device (1) for a motorcycle headlamp (2), wherein the illumination device (1) is configured to create a segmented light pattern, wherein the illumination device (1) comprises:
a plurality of light sources (3), wherein at least some of these light sources (3) are configured to be activated independently from each other;
a segmented light guide unit (4), comprising (i) a plurality of light guide elements (4a) and (ii) a light homogenization body (4b);
wherein each light guide element (4a) has a distal end comprising a light entry surface (4a′) that is configured to receive light (L) from at least one of the plurality of light sources (3), and wherein each light guide element (4a) fully extends towards the homogenization body (4b), said extension following at least partially along a main beam direction (x) of the illumination device (1), wherein the light guide elements (4a) are arranged in at least four columns (C) but no more than twelve columns (C) and least three rows (R1 to R7) in order to enable a segmentation of the light pattern, wherein the cross section of each light guide element (4a) continuously increases along its extension starting from its entry surface (4a′) towards the light homogenization body (4b), said cross section being measured in a plane that is oriented orthogonal to the main beam direction (x), wherein the segmented light guide unit (4) is created as a single pieced component by way of molding, of the plurality of light guide elements (4a) together with the light homogenization body (4b), wherein the light homogenization body (4b) extends along the main beam direction (x) in order to allow at least partial homogenization of light received from the light guide elements (4a) and wherein the light homogenization body (4b) comprises a collective light exit surface (4b′) for irradiating light (L1, L2, L3, L4) received by the light guide elements (4a); and
a projection lens (5), which is configured to receive the light emitted from the collective light exit surface (4b′) of the light homogenization body (4b) and to project the segmented light pattern,
wherein at least some of the light guide elements (4a) are part of a first group (G1) of light guide elements (4a), said first group (G1) of light guide elements (4a) having a defined geometric shape of the light entry surface (4a′), said light entry surface being limited by four corners (G1a, G1b, G1c, G1d) connected by four side edges, namely a left edge (G1ad), a right edge (G1bc), a lower edge (G1ab) and an upper edge (G1dc), wherein three out of these four side edges are straight, and wherein the fourth edge differs from the three straight edges by having a rounded protrusion (P), said rounded protrusion (P) increasing the light entrance surface (4a′), wherein said fourth edge is either the left or the right edge of the respective light guide element (4a1).
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