Auxiliary stop lamp for vehicles

• US 10,414,333 B2
• Filed: 06/05/2017
• Issued: 09/17/2019
• Est. Priority Date: 12/04/2014
• Status: Active Grant

• Current Assignee: Hella Gmbh & Co. Kgaa (Forvia SE)
• Original Assignee: Hella KGaA Hueck & Company
• Inventors: Muegge, Martin
• Primary Examiner(s): Allen, Stephone B
• Assistant Examiner(s): Booher, Adam W
• Application Number:
  US15/613,452
• Publication Number:
  US 20170267164A1
• Time in Patent Office: 834 Days
• CPC Class Codes: B60Q 1/302 mounted in the vicinity, e.g. in the middle, of a rear window
• CPC Class Codes: B60Q 1/44 for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
• CPC Class Codes: F21S 43/13 characterised by the type of light source
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/26 Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
• CPC Class Codes: F21S 43/40 characterised by the combination of reflectors and refractors
• CPC Class Codes: F21V 5/002 using microoptical elements for redirecting or diffusing light
• CPC Class Codes: G03H 1/2202 Reconstruction geometries or arrangements
• CPC Class Codes: G03H 2001/2228 adapted for reflection and transmission reconstruction
• CPC Class Codes: G03H 2001/2615 in physical contact, i.e. layered holograms

Abstract

An auxiliary stop lamp for vehicles, in particular a high mounted stop lamp for vehicles, having a light source for the radiation of a light beam and having a holographic element for the refraction and/or reflection of the light beam, the holographic element having a holographic light distributor to generate a stop light function, wherein the holographic element is arranged inside and/or in the region of an edge of a housing of the auxiliary stop lamp, or embodied as an edge of the housing of the auxiliary stop lamp.

Claims

1. An auxiliary stop lamp for a vehicle, the auxiliary stop lamp comprising:

a light source for radiation of a light beam; and

a holographic element for a diffraction or reflection of the light beam, the holographic element having a holographic light distributor to generate a stop light function,

wherein the holographic element is a transmission or a reflection holographic element and is arranged inside or in a region of an edge of a housing of the auxiliary stop lamp or as an edge of the housing of the auxiliary stop lamp or in a region of a light aperture of the auxiliary stop lamp,

wherein the holographic element is applied on an inner surface of a lens, so that the holographic element is positioned between the light source and the lens, and such that the light beam emitted by the light source is first diffracted or reflected by the holographic element before being transmitted to the lens, and

wherein the lens and a side of the housing located below a headliner or a side of the housing located above a parcel shelf of the vehicle are transparent.

2. The auxiliary stop lamp according to claim 1, wherein the lens forms the edge of the auxiliary stop lamp.

3. The auxiliary stop lamp according to claim 1, wherein the light source is arranged in the housing on a narrow side of the housing opposite the holographic element such that the light beam emitted by the light source is guided essentially parallel in a direction of the holographic element via an optical element assigned to the light source.

4. The auxiliary stop lamp according to claim 1, wherein the light source is arranged on a longitudinal side of the housing, and wherein a deflecting reflector is assigned to the light source for a deflection of the light beam radiated from the light source in a direction substantially parallel to the longitudinal side of the housing.

5. The auxiliary stop lamp according to claim 1, wherein the light source is a laser light source arranged on a narrow side of the housing opposite the holographic element.

6. The auxiliary stop lamp according to claim 1, wherein the lens is located between opposing longitudinal sides of the housing.

7. The auxiliary stop lamp according to claim 1, wherein the auxiliary stop lamp is arranged in the region of the headliner or in the region of the parcel shelf of the vehicle.

8. The auxiliary stop lamp according to claim 1, wherein the holographic element is a film in which a structure diffracting light according to a given light function is integrated or applied.

9. The auxiliary stop lamp according to claim 1, wherein the holographic element is configured such that a homogenous, regularly illuminated light radiating surface with a desired light distribution pattern is generated and/or that any defined, illumination pattern is generated and/or that a pattern partially deviating from the planar illumination or symbol or graphics is generated and/or that an illuminated graphics creating a three-dimensional impression with a depth effect is generated.

10. The auxiliary stop lamp according to claim 1, wherein the auxiliary stop lamp is a high mounted stop lamp.

11. The auxiliary stop lamp according to claim 1, further comprising an optical element or reflector that guides the light beam emitted from the light source in a direction of the holographic element.

12. The auxiliary stop lamp according to claim 1, wherein the lens extends in a plane that is parallel to a window of the vehicle to which the auxiliary stop lamp is mounted.

13. An auxiliary stop lamp for a vehicle, the auxiliary stop lamp comprising:

a light source for radiation of a light beam; and

a holographic element for a reflection of the light beam, the holographic element having a holographic light distributor to generate a stop light function,

wherein the holographic element is a reflection holographic element and is arranged inside a housing of the auxiliary stop lamp,

wherein the holographic element is applied on an inner surface of a longitudinal side of the housing as a volume reflection holographic element, the longitudinal side of the housing being transparent, and

wherein the auxiliary stop lamp does not include a lens, such that the light beam that is diffracted or reflected by the holographic element is transmitted directly to a window of the vehicle to which the auxiliary stop lamp is mounted.

14. An auxiliary stop lamp for a vehicle, the auxiliary stop lamp comprising:

a light source for radiation of a light beam; and

a holographic element for a diffraction or reflection of the light beam, the holographic element having a holographic light distributor to generate a stop light function,

wherein the holographic element is a transmission or a reflection holographic element and is arranged inside or in a region of an edge of a housing of the auxiliary stop lamp or as an edge of the housing of the auxiliary stop lamp or in a region of a light aperture of the auxiliary stop lamp,

wherein the holographic element is applied on an inner surface of a lens, so that the holographic element is positioned between the light source and the lens, and such that the light beam emitted by the light source is first diffracted or reflected by the holographic element before being transmitted to the lens, and

wherein the holographic element is a diffractive optical element on the lens, which is applied to an injection-molding tool and which is formed during injection-molding of the lens.