Patent ID: 11953170
Assignee: ZKW GROUP GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G | IPC F

Claim 0:
1. An illumination device (1) for a motor vehicle headlamp for generating a light distribution, the illumination device (1) comprising: a light source (2) configured to emit at least one light beam in a main direction (X) of the illumination device (1); an optic body (3) arranged downstream of the light source (2) along the main direction (X), wherein the optic body (3) comprises: a light input section (3a) for coupling the light beam from the light source (2) into the optic body (3), said light input section (3a) comprising a light collecting element (4), which is assigned to the light source (2) and is configured to couple the light beam from the assigned light source (2) into the optic body (3) in such a way, that light rays forming the light beam are essentially parallel to each other and essentially parallel to the main direction (X) after being coupled into the optic body (3), wherein the parallel light beam has a first vertical extent (v1, v1′) in a main vertical cross section (v)—seen in a correct installed state of the illumination device (1) in a vehicle—, when being coupled into the optic body (3), said main vertical cross section (v) is parallel to the main direction (X), a light output section (3b) for decoupling the light beam coupled into the optic body (3) via the light input section (3a), out of the optic body (3) in the main direction (X), and a shell surface (3c) limiting the optic body (3), said shell surface (3c) is configured to deflect the light beam coupled into the optic body (3), which shell surface (3c) extends between the light input section (3a) and the light output section (3b); and an optical system (5), comprising at least one optical element (5a), arranged downstream of the optic body (3) along the main direction (X) in order to receive the light beam emitted from the light output section (3b) of the optic body (3), wherein the optical system (5) is configured to project the light beam in front of the illumination device (1), wherein the optical system (5) in combination with the light source (2) and the optic body (3) are configured to generate the light distribution, and wherein: the optic body (3) comprises a first pair of optically operative surfaces (6) for guiding the light beam coupled into the optic body (3) via the light input section a) along a first light beam path (LB1) from the light input section (3a) to the light output section (3b), the first pair of optically operative surfaces (6) consists of a first and second light deflection surface (6a, 6b), wherein the first and second light deflection surfaces (6a, 6b) are arranged on the shell surface (3c), wherein the optic body (3) comprises a first and a second side arranged opposite to each other, wherein the first light deflection surface (6a) is arranged on the first side and the second light deflection surface (6b) is arranged on the second side of the optic body (3), in the main vertical cross section (v) the first light deflection surface (6a) follows a first parabola, wherein the second light deflection surface (6b) follows a second parabola, wherein the first and second light deflection surfaces (6a, 6b) are arranged on the shell surface (3c) in such a way that the first and second parabola have a common first focal point (fp1), the light beam following the first light beam path (LB1) is incident on the first light deflection surface (6a) and is deflected to the second light deflection surface (6b), and the deflected light beam is incident on the second light deflection surface (6b) and is deflected to the light output section (3b) for coupling out of the optic body (3), the light output section (3b) comprises a first light exit surface (7a), wherein the first pair of optically operative surfaces (6) and the light output section (3b) are arranged in such a way, that the light beam deflected by the second light deflection surface (6b) is incident on the first light exit surface (7a), and the first and second light deflection surfaces (6a, 6b) and the first light exit surface (7a) are configured in such a way, that light rays forming the light beam are essentially parallel to each other and essentially parallel to the main direction (X) after being coupled out of the optic body (3), wherein the outcoupled parallel light beam has a second vertical extent (v2, v2′) in the main vertical cross section (v), said second vertical extent (v2, v2′) is greater than the first vertical extent (v1, v1′); wherein the light source (2) is configured to emit a second light beam, wherein the optic body (3) comprises a second pair of optically operative surfaces (8) for guiding the second light beam coupled into the optic body (3) via the light input section (3a) along a second light beam path (LB2) from the light input section (3a) to the light output section 3b), wherein the second light beam has a third vertical extent (v3) in the main vertical cross section (v), when being coupled into the optic body (3), wherein the second pair of optically operative surfaces (8) consists of a third and fourth light deflection surface (8a, 8b), wherein the third and fourth light deflection surfaces (8a, 8b) are arranged on the shell surface (3c), wherein the third light deflection surface (8a) is arranged on the first side and the forth light deflection surface (8b) is arranged on the second side of the optic body (3), wherein in the main vertical cross section (v) the third light deflection surface (8a) follows a third parabola, wherein the forth light deflection surface (8b) follows a forth parabola, wherein the third and fourth light deflection surfaces (8a, 8b) are arranged on the shell surface (3c) in such a way, that the third and fourth parabola have a common second focal point (fp2), wherein the second light beam following the second light beam path (LB2) is incident on the third light deflection surface (8a) and is deflected to the forth light deflection surface (8b), and wherein the deflected second light beam is incident on the forth light deflection surface (8b) and is deflected to the light output section (3b) for coupling out of the optic body (3), wherein the light output section (3b) comprises a second light exit surface (7b), wherein the second pair of optically operative surfaces (8) and the light output section (3b) are arranged in such a way, that the light beam deflected by the fourth light deflection surface (8b) is incident on the second light exit surface (7b), and wherein the third and fourth light deflection surfaces (8a, 8b) are configured in such a way, that light rays of the second light beam are essentially parallel to each other and essentially parallel to the main direction (X) after being coupled out of the optic body (3), wherein the outcoupled essentially parallel light beam has a forth vertical extent (v4) in the main vertical cross section (v), said forth vertical extent (v4) is smaller than the third vertical extent (v3).