Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
  • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
  • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
  • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255

Definitions

• the present invention relates to a lighting device for a vehicle with at least one lens, behind which at least one light source is arranged.
• the lens has at least a first and a second layer.
• the first layer faces the light source and is transparent.
• the second layer has a first region, in which openings are formed, so that light emitted by the light source and passing through the lens passes through the first layer only in the area of the apertures, but not through the second layer.
• Lighting devices are increasingly contributing to the design of the vehicle.
• the design of the lighting devices should in particular give the vehicle a characteristic appearance, which is easily recognized and by which the vehicle differs from the design of other vehicles.
• the installation space conditions for the lighting devices of the vehicle, in particular for the rear lights and headlights make it necessary for the construction of the lighting devices to be very compact and to leave little space for the lighting surfaces of the lighting devices.
• a vehicle lamp which comprises a housing which is closed by an outer lens and in which a
• Lamp is housed. Between the lamp and the outer lens, an inner lens is provided, which with at least one strip-shaped
• Passage region which has a lens structure.
• the inner lens has been produced, for example, in a multi-layer injection molding process. It includes an inner and an outer layer. The inner layer has on its side facing the bulb remindstrahlergeometrien. Between the retroreflector geometries there are light transmission areas for the light emitted by the illuminant.
• a vehicle lamp with a housing and a lens which is divided into at least two separate translucent and spaced apart light windows. Between the light windows is a opaque area provided. In this opaque region, in turn, at least one additional light-transmissive region is provided. For this purpose, the opaque region on a breakthrough.
• the present invention is based on the technical problem to provide a lighting device of the type mentioned, in which a large-area light-emitting surface
• the lighting device is characterized in that the first region of the second layer is formed semitransparent and light-scattering, so that outside of the openings emitted by the light source, passing through the lens light passes through the first layer and then through the first region of the second layer at least partially passes and emerges diffusely at a surface of the first region of the second layer.
• a diffuse light emission or a diffuse light emission is understood to mean that the light emission is not directed, but is due to a plurality of scattering centers in a multiplicity of different directions.
• the light emission is not directed at the diffuse light emission.
• a light beam incident in parallel can be reflected in accordance with Lambert's law, or large angle scattering can be generated.
• the diffuse light emission or the diffused light emission is z. B. by an opaque
• an opaque embodiment is understood to mean that light passes at least partially through the first region of the second layer. When passing through the light, the passing
• the incoming light is distributed in the first region of the second layer in such a way that an incident light is emitted in the first region of the second layer Substantially homogeneous light emission takes place via the luminous area of the first area of the second layer.
• the light emerges in a directed manner due to the transparent configuration of the first layer.
• the luminous surface of the lens is given a particularly characteristic appearance, since within the diffuse
• the first layer has projections which extend into the apertures.
• the projections extend in particular beyond the surface plane of the second layer.
• a sheath of at least a portion of the part of the projections is formed, which extend beyond the surface plane of the second layer.
• the lighting device According to a development of the lighting device according to the invention, light emitted by the light source passes through the first layer in the region of the openings. This light then exits at the front of the projections.
• the front side of the projections is formed facet-like according to this embodiment of the invention. On the front side can be ground several facets that are not aligned parallel to each other. The facets may be formed, for example pyramid-like.
• the front side of the projections may be provided with a brilliant cut. This ensures that the light emission from the front side of the projections is brilliant and generates a sparkle.
• this sparkling light emission at the openings is a diffuse light emission in the first region of the second layer. Within the lens thus light leaks are generated with very different characteristics. As a result, the lens and thus the lighting device is given a very characteristic appearance.
• the first region of the second layer is in particular strip-shaped.
• Breakthroughs are in this case within the strip.
• the strips of the second layer are for example, rectangular. According to another embodiment, concentric rings are formed as strips.
• the lens is given in this way a strip-like appearance, which is very characteristic for the viewer.
• the openings are each arranged along a line, in particular a straight line, within the strip of the second layer.
• the distance between the apertures is for example less than 5 cm. He is in particular about 1 cm.
• the second layer has a second region, which is strip-shaped and whose strips each lie between two strips of the first region.
• the second region is in particular made opaque.
• Light emission at the first region of the second layer alternates with an opaque portion of the second region of the second layer.
• the lens can be produced in particular by multi-component injection molding.
• successively the following three components can be injected into the mold: First, an opaque plastic, which forms the second region of the second layer, is injected, after which an opaque plastic is injected, which forms the first region of the second layer, wherein the Breakthroughs are recessed, and then a transparent plastic is injected, which forms the first layer and which fills the openings, so that the projections are formed.
• the tool can be designed so that the faceted end face of the projections is generated.
• this includes a plurality of light sources.
• the light sources may be, for example, light
• the light sources are in particular arranged so that behind the openings in each case a light source is arranged.
• the light emitted by the light sources passes through the lens of the light emitting device and occurs both in the
• Breakthroughs as well as the first area of the second layer of the lens.
• this achieves that in the first region of the second layer a very homogeneous diffuse light emission is generated.
• a light emission with a different emission characteristic is produced at the openings of the second layer.
• the lighting device is in the lens to an intermediate lens, between the light source and a
• the lens is advantageously protected against environmental influences.
• the light-locking lens has a clear-glass look, so that the observer generates the light generated by the lens
• the lens is a lens, which closes a housing of the lighting device to the outside.
• Figure 1 shows a cross section through an embodiment of the invention
• Figure 2 shows a view of the lens of the embodiment of
• FIG. 3 shows the section B-B according to FIG. 2 through the lens of FIG
• the lighting device 1 may be the rear light or the headlight for a motor vehicle.
• the lighting device 1 comprises a housing 2, which is closed to the outside by a transparent clear lens cover 3 formed in clear glass optics.
• a lens 7 is arranged within the housing 2.
• Behind this lens 7, a light source assembly 4 is arranged.
• the light source arrangement 4 comprises a circuit board 5 on which a multiplicity of light-emitting diodes 6 are arranged like a matrix. The light-emitting diodes 6 emit light in the direction of the light disk 7
• the lens 7 has a multilayer structure. It comprises a first layer 11, which, as shown in FIG. 3, faces the light source arrangement 4.
• a second layer 12 Facing away from the light source arrangement 4 and facing the light-closing disk 3, a second layer 12 is provided.
• a plan view of this second layer 12 of the lens 7 is shown in FIG.
• the second layer 12 is divided into two regions: the first region 9 is opaque, i. semitransparent and light-scattering trained.
• Light emitted from the light-emitting diodes 6 and passing first through the first layer 11 and then passing through the first region 9 of the second layer 12 is scattered in the first region 9 of the second layer 12, so that at the surface 17 of the first Area 9 of the second layer 12 light emerges diffusely.
• the appearance of this first region 9 of the second layer 12 is cloudy.
• the first region 9 of the second layer 12 of the light disk 7 is strip-shaped. Adjacent rectangular strips of the first region 9 are spaced from one another. Between the strips of the first region 9 rectangular strips are formed, which form a second region 8 of the second layer 12 of the lens 7. In this second region 8, the second layer 12 is formed opaque. The material of this second region 8 is dyed black, for example.
• the board 5 of the light assembly 4 is arranged in an imaginary plane E1. Spaced to this board 5, the surface of the lens 7 formed by the first layer 11 is arranged in a parallel plane E2. The first layer 11 of the lens 7 extends to a parallel plane E3. The second layer 12 of the lens 7 extends to a parallel plane E4.
• apertures 13 are formed, as shown in detail in FIG. Within these breakthroughs 13 are
• Projections of the first layer 1 1 formed.
• the material of which the first layer 11 is made thus extends in the region of the openings 13 of the second layer 12 into these openings 13 and forms the projections 14.
• Projections 14 extending from the plane E4 to a parallel plane E5 is provided with a jacket 16. These sheaths 16 are formed of the same material as the second layer 12. Adjacent to the openings 13, the second layer 12 thus rises in the casing 16.
• the projection 14 rises above the sheath 16,. i.e. beyond the E5 level.
• the projection 14 is provided with a facet cut.
• the openings 13 may have, for example, a square cross-section, so that the base surface of the projection 14 is square.
• pyramid-like facets 15 are ground.
• the end face 10 may have been provided with a different cut, for example a brilliant cut.
• the light-emitting diodes 6 are each arranged behind the openings 13. That of the
• Light emitted by light emitting diodes 6 strikes the surface of the first layer 11 of the lens 7 and enters the first layer 11. In the area outside the openings 13, the light from the first layer 1 1 enters the second layer 12 a. Due to the opaque configuration of the first region of the second layer 12, the light is scattered here in such a way that a homogeneous, diffuse light emission is generated at the surface 17 of the first region 9 of the second layer 12. The portion of the light which strikes the second region 8 of the second layer 12 from the first layer 12 is either absorbed or reflected back. The light can not pass through the opaque second region 8 of the second layer 12.
• the light emitted by the light-emitting diodes 6 and entered into the first layer 11 does not pass through the second layer 12.
• the protrusions 14 are not considered to belong to the second layer 12, since these protrusions 14 are made of a material having a different light characteristic.
• the protrusions 14 could also be omitted so that the light would then pass through openings in the second layer 12.
• the light in the present case from the first layer 1 1 in the projections 14 light rays, possibly on the
• the first layer 11 and the projections 14 and the second layer 12 both in the first region 9 and in the second region 8 may be made of a plastic, wherein the plastic in the first layer 11 and the projections 14 is transparent and transparent, whereas the plastic in the first region 9 of the second layer 12 is opaque and is opacified in the second region 8 of the second layer 12.
• the lens 7 can be produced in a manner known per se by means of a multi-component injection molding process.

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Citations (8)

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• 2011
  • 2011-08-31 DE DE102011111994A patent/DE102011111994B3/de active Active
• 2012
  • 2012-07-27 WO PCT/EP2012/003207 patent/WO2013029730A1/de active Application Filing
  • 2012-07-27 CN CN201280042644.6A patent/CN103765084B/zh active Active

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