MOTOR VEHICLE LIGHT WITH A LIGHT CONDUCTOR AND A SHIELD THAT IS VISIBLE THROUGH THE LIGHT CONDUCTOR

• US 20140140084A1
• Filed: 11/20/2013
• Published: 05/22/2014
• Est. Priority Date: 11/22/2012
• Status: Active Grant

• Current Assignee: Automotive Lighting Reutlingen GmbH (Stellantis NV)
• Original Assignee: Automotive Lighting Reutlingen GmbH (Stellantis NV)
• Inventors: Zwick, Hubert
• Granted Patent: US 9,908,460 B2
• Time in Patent Office: Days
• US Class Current: 362/511
• CPC Class Codes: B60Q 1/26 the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
• CPC Class Codes: F21S 43/237 rod-shaped
• CPC Class Codes: F21S 43/241 of complex shape
• CPC Class Codes: F21S 43/245 emitting light from one or more of its major surfaces
• CPC Class Codes: F21S 43/247 with a single light source being coupled into the light guide
• CPC Class Codes: F21S 43/249 with two or more light sources being coupled into the light guide
• CPC Class Codes: F21S 43/315 using total internal reflection

Abstract

Presented is a motor vehicle light with a light source, a light conductor, which comprises a bordering decoupling volume opposite of a first side and a second side lying opposite the second side, wherein the second side comprises decoupling elements, which decouple light distributed about a principal propagation direction, and wherein the motor vehicle light comprises a colored shield which is positioned behind the second side in a direction opposite to the principal propagation direction. The shield is a black shield.

Claims

1. A motor vehicle light (1) with a light source (14), a light conductor (10), which comprises a decoupling volume (16) that is bordered from a first side (18) and a second side (20) lying opposite the first side, wherein the second side includes deflection surfaces (22), which are configured to deflect light impinging on them toward the first side such that this light is decoupled there distributed about a principal emission direction (19), and wherein the motor vehicle light includes a colored shield, which is positioned behind the second side in a direction opposite to the principal emission direction, wherein the shield is a black shield (21), the first side (18) includes individual decoupling surfaces (26) that are spatially separated from each other and are offset relative to one another in the principal emission direction and that the deflection surfaces (22) lying in the second side (20) are likewise offset relative to one another in the principal emission direction, wherein the decoupling surfaces (26) and the deflection surfaces (22) are matched to each other, dimensioned and arranged such that in each case only one of the decoupling surfaces (26) is illuminated from exactly one deflection surface (22) from the second side (20) and that the light conductor (10) includes a focusing volume (28) which lies between the light incident surface (12) and the decoupling volume (16), which is configured to reduce the aperture angle of the light beam entering into the decoupling volume (16).

2. The motor vehicle light (1) as set forth in to claim 1, wherein the light source (14) is a semi-conductor light source, which includes one or multiple light emitting diodes.

3. The motor vehicle light (1) as set forth in claim 1, wherein the black shield (21) is identical or at least integral with a heat sink (21.a) which exists anyway for the cooling of a semiconductor light source of the light.

4. The motor vehicle light (1) as set forth in claim 1, wherein the black shield has the size of the light conductor and is positioned behind the light conductor such that it is visible when looking into the light.

5. The motor vehicle light (1) as set forth in claim 1, wherein the form of the black shield is matched to the form of the light conductor.

6. The motor vehicle light (1) as set forth in claim 1, wherein the black shield protrudes above the light conductor on at least one side, be it on the top and/or on the bottom and/or right and/or left, and thus surrounds said light conductor for a little distance.

7. The motor vehicle light (1) as set forth in claim 1, wherein the light (1) is a flashing light.

8. The motor vehicle light (1) as set forth in claim 1, wherein the pairs from each one deflection surface (22) and the associated decoupling surface (26) are dimensioned such that the decoupling surfaces 26 of different pairs appear to be equally bright for light coupled-in by the light incident surface (12).

9. The motor vehicle light (1) as set forth in claim 1, wherein the light conductor (10) includes one shading surface (30) to one decoupling surface (26) in each case, which forms a part of the first side (18) of the light conductor (10).

10. The motor vehicle light (1) as set forth in claim 9, wherein one edge (40) of the light conductor (38), which separates one partial surface (30.2) of the shading surface (30) from one decoupling surface (26), which is shaded by this shading surface (30), is an angular section from a first circular arc, that one edge (44) that is bordering this decoupling surface (26) on its side facing away from the partial surface (30.2) is an angular section from a second circular arc concentric to the first circular arc and with a greater radius, the edges (46, 48) that border the associated deflection surface (22) are angular sections of additional circular arcs that proceed concentrically to the first circular arc and the second circular arc, and the decoupling surfaces (26) of the light conductor (38), like the decoupling surfaces (26), are curved convexly, wherein the convex curvature on the light conductor (38) extends transversely to the circular arc form of the edges (40) and (44) that border the decoupling surfaces.

11. The motor vehicle light (1) as set forth in claim 10, wherein the shading surface 30 includes two partial surfaces (30.1) and (30.2), which together enclose an angle, wherein the one partial surface (30.1) is a totally reflecting boundary surface, which lies in the decoupling volume parallel to the principal propagation direction of the light and which shades the subsequent decoupling surface against light in the direction of the light, which would impinge directly from the focusing volume onto the decoupling surface and thus without preceding reflection on a deflection surface.