Patent ID: 11971151
Assignee: ZKW GROUP GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A signal lighting or lighting device (10) for a motor vehicle or for a motor vehicle headlight, comprising:
at least one light source (50) for emitting light rays; and
a light guiding body (100) associated with the at least one light source (50), wherein:
the light guiding body (100) has an entry section (110) and a light exit area (160),
light rays emitted by the at least one light source (50) enter the light guiding body (100) via the entry section (110), propagate in the light guiding body (100), and exit the light guiding body (100) via the light exit area (160),
the light exit area (160) comprises two light-emitting surfaces (161, 162),
the entry section (110) is designed in such a way that the light rays emitted by the at least one light source (50) are oriented substantially in a light guide main direction of propagation (X),
the light guiding body (100) comprises a beam splitting device (200), wherein the beam splitting device (200) comprises a total internal reflection surface (201), which is configured to totally reflect at least part of the light rays (S1) incident thereon such that these light rays (S3) propagate in the light guiding body (100) in a direction (Z) deviating from the light guide main direction of propagation (X),
the total internal reflection surface (201) has individual optical structures (202), which are configured such that at least part of the light rays (S1) incident on an individual structure (202) exit the light guiding body (100) via the individual structure (202), enter the light guiding body (100) again via a re-entry surface (203), wherein the re-entered light rays (S2) are directed to one of the light-emitting surfaces, the “first” light-emitting surface (161), which first light entry surface (161) is opposite to the re-entry surface (203), such that these light rays can exit the first light-emitting surface (161) in a main emission direction (Y),
the light rays (S3) totally reflected by the total internal reflection surface (201) are totally reflected at a rear side (101) of the light guiding body (100) and thereby deflected to the second light-emitting surface (162), where the light rays (S5) exit the light guiding body (100) in the main emission direction (Y),
each individual optical structure (202) is designed as a recess in the total internal reflection surface (201), wherein each recess, starting from an opening (2021) in the light guiding body (100), is delimited by lateral surfaces (2022, 2023, 2024; 2022, 2023, 2024a, 2024b) extending into the light guiding body (100),
one of the lateral surfaces, the so-called base surface (2022), is oriented in such a way that light rays (S1) incident thereon pass through the base surface (2022) in the direction of the first light-emitting surface (161), and
each opening (2021) occupies an area, the so-called opening area, on the total internal reflection surface (201), wherein an opening area has an opening surface area AB,i, the total internal reflection surface (201) has a total surface area Ages, wherein Ages is the sum of all opening surface areas, and the first light-emitting surface (161) has a first surface area A1 and the second light-emitting surface (162) has a second surface area A2, wherein

ΣiAB,i/(Ages−ΣiAB,i)=A1/A2