US 11,852,313 B2
Light device of a vehicle to ensure a dark, or colored appearance of at least a part of the light device in the off state
Tomas Gloss, Vitkov (CZ); Jakub Hruska, Hlucin (CZ); and Jiri Kochanek, Frydek-Mistek (CZ)
Assigned to PO Lighting Czech s.r.o., Senov u Noveho (CZ)
Filed by PO Lighting Czech s.r.o., Senov U Noveho Jicina (CZ)
Filed on Mar. 8, 2022, as Appl. No. 17/688,991.
Claims priority of application No. CZ2021-112 (CZ), filed on Mar. 10, 2021.
Prior Publication US 2022/0290834 A1, Sep. 15, 2022
Int. Cl. F21S 41/43 (2018.01); F21S 45/50 (2018.01); F21S 41/141 (2018.01)
CPC F21S 41/43 (2018.01) [F21S 41/141 (2018.01); F21S 45/50 (2018.01)] 14 Claims
OG exemplary drawing
 
1. A light device of a vehicle, comprising:
a housing covered with a transparent or translucent
cover separating the external environment of the vehicle from the interior of the housing and protecting the interior of the housing from the ingress of dirt and water from the external environment,
an optical unit situated in the housing, comprising
at least one light source and optical elements to direct light rays generated by the light source,
and a functional plate member comprising a lamella layer,
wherein the lamella layer comprises
first lamellas, which are transparent for light,
second lamellas, which are non-transparent for
light,
an input surface that is averted from the cover, faces the optical unit, and is configured to bind at least a part of light rays exiting from the optical unit to the lamella layer, and an output surface, facing the cover, for the
exit of light beams of light rays through the first lamellas from the lamella layer,
wherein the first and second lamellas—
extend across the whole thickness of the lamella
 layer,
are in a mutual contact and alternate each other,
are relative to a horizontal plane inclined so that
 light beams, comprising the at least part of light rays exiting from the optical unit and that pass through the lamella layer directly without reflection from the second lamellas, pass through the first lamellas, and so that, when the light source is off, the daylight that falls onto the second lamellas from the said external environment is not reflected by the second lamellas out of the light device into the external environment.