Illuminated pointer instrument for a motor vehicle
AssigneeAudi AG
InventorsMatthias Wunderlich, Lutz Diederichs
Life of this patent
Estimating the term…
Abstract
A pointer needle for an indication device of a motor vehicle has a transparent optical waveguide that receives light propagating along a direction of propagation at a light-entry side, and emits the light in an emission direction at a light-exit side. The optical waveguide has a scattering side opposite to the light-exit side, the scattering side having steps arranged offset to one another across the propagation direction. When the steps are irradiated by light, the pointer needle provided in the indication device can clearly be perceived in the dark.
Claims15
A display device for a motor vehicle, comprising:
- a pointer needle, including:
- a pointer foot disposed at one end of the pointer needle,
- a pointer tip disposed at another end of the pointer needle such that the pointer needle extends in a longitudinal direction from the pointer foot to the pointer tip,
- a light input device having a light-tight mount element that surrounds a transparent propagation region provided in the light input device, and
- a transparent lightguide having:
- a light-entry side, disposed adjacent to the light-tight mount element and extending along the longitudinal direction from the pointer foot to the pointer tip, configured to receive, from the transparent propagation region which is open toward the light-entry side, light propagating along a propagation direction,
- a light-exit side configured to emit the light in an emission direction, and
- a scattering side disposed opposite to the light-exit side and including a plurality of steps arranged offset in relation to one another and transversely with respect to the propagation direction, the plurality of steps being configured to scatter light entering the transparent lightguide toward the light-exit side.
A motor vehicle, comprising:
- a chassis;
- and
- a display device having a pointer needle, the pointer needle including:
- a pointer foot disposed at one end of the pointer needle,
- a pointer tip disposed at another end of the pointer needle such that the pointer needle extends in a longitudinal direction from the pointer foot to the pointer tip,
- a light input device having a light-tight mount element that surrounds a transparent propagation region provided in the light input device, and
- a transparent lightguide having:
- a light-entry side, disposed adjacent to the light-tight mount element and extending along the longitudinal direction from the pointer foot to the pointer tip, configured to receive, from the transparent propagation region which is open toward the light-entry side, light propagating along a propagation direction,
- a light-exit side configured to emit the light in an emission direction, and
- a scattering side disposed opposite to the light-exit side and including a plurality of steps arranged offset in relation to one another and transversely with respect to the propagation direction, the plurality of steps being configured to scatter light entering the transparent lightguide toward the light-exit side.
Dependencies are inferred from the claim text.