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
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
  • F21S41/32—Optical layout thereof
  • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
  • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
  • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
  • F21S41/25—Projection lenses
  • F21S41/26—Elongated lenses
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
  • F21S41/141—Light emitting diodes [LED]
  • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
  • F21S41/141—Light emitting diodes [LED]
  • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
  • F21S41/25—Projection lenses
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
  • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes

Definitions

• the present invention generally relates to a projector intended to be mounted on a motor vehicle
• projectors or vehicle headlights
• vehicle headlights arranged on a vehicle so as to project one or more beams of light towards the front of the vehicle to illuminate the road.
• These projectors are generally constituted by at least one light source, such as a light bulb, and a lens or ice that protects the light bulb.
• the projectors each comprise several light sources of different intensities which can be lit at the same time or not in order to manage the beam geometries and / or the luminous intensity of the headlamp and thus propose specific geometries and / or intensities. at high beams, low beam or position lights.
• the light source emits a beam that can be projected directly or indirectly towards the front of the vehicle. During an indirect projection of the beam, it is projected against a reflecting element which reflects it towards the front of the vehicle.
• document FR 2844033 describes such a headlight with independent modules each comprising a light source, a reflector and a lens.
• a problem with this type of projector is that it requires several modules to have enough lighting options, which greatly reduces its flexibility and takes a lot of space.
• An object of the present invention is to meet the disadvantages of the document of the prior art mentioned above and in particular, first of all, to provide a projector or headlight with a high degree of modularity and flexibility while being compact.
• a first aspect of the invention relates to a vehicle headlight comprising a support, a plurality of light sources. disposed on the support, each arranged to emit light, at least one reflector arranged to reflect the light emitted by each light source, and thereby form a plurality of light beams, and a plurality of lenses each arranged to project one of light beams reflected by the reflector, wherein the at least one reflector comprises a plurality of cavities, each cavity corresponding to a specific light source and a specific lens and being arranged to reflect the light of the specific light source among the plurality from light sources to the specific one of the plurality of lenses and characterized in that the support is disposed between the at least one reflector and the plurality of lenses.
• each cavity is arranged to reflect exclusively the light emitted by its specific light source so that the reflector separates the light into reflected beams.
• the projector can emit several types of independent light beams with a single module.
• the support is centered symmetrically with respect to the cavities inside the reflector.
• the different beams have a similar intensity.
• the light sources are light emitting diodes (LEDs).
• LEDs light emitting diodes
• the cavities are ellipsoidal or tapered surfaces of revolution with two foci.
• the reflector is easy to implement.
• each light source is merged with a first focus of the corresponding cavity. In this way, the light is well emitted towards the corresponding cavities and the optical path is optimal.
• a second focus of each cavity is coincident with a focal point of the corresponding lens.
• the beams are well reflected to the corresponding lenses and the optical path is optimal.
• the plurality of lenses is molded in one piece, in which a space between the lenses is provided and hidden by a hubcap. In this way, they can be standardized and the assembly time can be reduced.
• a particularly interesting embodiment consists in that the projector comprises a cover, fixed or mobile, near a second focus of at least one cavity.
• the projector comprises a cover, fixed or mobile, near a second focus of at least one cavity.
• a second aspect of the invention is a vehicle comprising a projector according to the first aspect of the invention.
• FIG. 1 shows a light beam projection module for a projector of the present invention
• FIG. 2 shows an example of a code light beam projected by a projector of the present invention.
• FIG. 1 represents a vehicle headlamp 1 according to a preferred embodiment of the invention, or more specifically a module of projecting light beams of a vehicle headlamp 1 of the present invention.
• the module therefore the projector 1, comprises a plurality of light sources 2 (light sources) such as LEDs (light emitting diodes) mounted on a single support 21, such as for example a PCB ( printed circuit board).
• the number of light sources 2 is four, and each is arranged to emit light.
• the various light sources are arranged both above and below the PCB and possibly symmetrically.
• the four light sources 2 are mounted on the PCB 21 substantially symmetrically with respect to the edge of the PCB, that is to say two light sources 2 disposed adjacently on an upper surface of the PCB 21 and two other light sources 2 disposed adjacently on a lower surface of the PCB 21.
• the projector 1 also comprises a reflector 3 arranged to reflect the light emitted by the different light sources 2 towards the front of a vehicle in which the projector is installed. More particularly, the reflector 3 in this embodiment shown in FIG. 1 comprises four reflection surfaces 31-34, also called under reflectors or cavities, each dedicated to a specific light source 2 so as to reflect the light emitted by the corresponding light source.
• the support 21 is disposed in the center of the reflector 3 symmetrically with respect to the various cavities 31 - 34.
• the projector 1 further comprises a plurality of lenses 4 (in FIG. 1, four lenses 4 are shown but the invention is not limited to this number) which are each associated with a specific light source 2 and a surface of reflection 31 -34 specific, and arranged to project one of the light beams from the light emitted by a light source 2 and reflected by the reflector 3 associated, towards the front of the vehicle.
• the support 21 is disposed between the reflector and the lenses in order to increase the compactness of the projector.
• each cavity 31 -34 corresponds to a specific light source 2 and to a specific lens 4, and is arranged to reflect light from the specific light source towards its specific lens 4 among the plurality of lenses 4.
• each cavity is arranged or oriented to exclusively reflect light from its specific light source so that the reflector separates the light into reflected beams.
• reflection surfaces 31-34 are preferably cavities 31 -34 having ellipsoidal or tapered surfaces of revolution with two foci, a first focus and a second focus, and are arranged to separate the light emitted by the different sources. of light in different beams of light.
• Each of these cavities 31-34 is arranged to reflect the light of a specific light source 2 to its corresponding lens 4 among the plurality of lenses 4.
• the second foci are shown in Figure 1 by an asterisk on the broken line.
• each ellipsoidal reflection surface or cavity 31 -34 has a spatial orientation defined by a site and an azimuth. This defines the return direction of the light flux captured by each reflection surface 31 -34. In FIG. 1, these return directions are each represented by a discontinuous line by cavity / lens pair. The light flux from each light source is reflected to the second focus of each reflection surface.
• each reflection surface 31-34 coincides with the focus of one of the associated projection lenses 4.
• the lenses 4 allow the projection and conformation of the light beam for the creation of a particular automobile lighting distribution such as code lights, high beam, or the like.
• Figure 1 are shown four lenses 4 in matrix arrangement. This The set of lenses is represented by independent lenses, however, they can be molded on the same piece. Moreover, although this is not shown, the space between the lenses 4 can be hidden by a hubcap.
• each light source 2 is merged with the first focus of its corresponding cavity 31-34 and the second foci of each cavity 31-34 coincide with a focus of its corresponding lens 4.
• the plurality of lenses 4 may be molded in one piece (but not a single lens) using a conventional technique in which a distance or gap between the lenses 4 will be hidden by a hubcap or possibly filled with an opaque material.
• the projector 1 may comprise one or more fixed or movable covers at each second focus, that is to say at the second focus of each cavity 31 -34 for the creation of dual-function beams.
• FIG. 2 shows an exemplary code-type lighting beam beam on a screen at, for example, 25m, by a projector of the present invention.
• Each part of the beam represented by a different pattern, comes from one of the lenses of Figure 1.
• the four lenses project four beams (S1-S4) of different sizes and / or shapes.
• each lens is optimized to generate a portion of the final beam.
• each beam can be controlled so as to project a pattern having a particular shape, it is possible to provide, in the vicinity of the second focus of at least one of the cavities 31 -34, a fixed or movable cover arranged to affect at least a portion of each cavity. This gives the possibility of creating dual-function beams. Indeed, the movement of the cache makes it possible to switch from one function to another.
• the covers can be independent or constitute a single piece.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Optics & Photonics (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52684336

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Citations (1)

Family Cites Families (16)

• 2014
  • 2014-10-29 FR FR1460391A patent/FR3028007A1/fr not_active Withdrawn
• 2015
  • 2015-10-08 WO PCT/FR2015/052713 patent/WO2016066915A1/fr active Application Filing
  • 2015-10-08 EP EP15784092.7A patent/EP3212993A1/de not_active Withdrawn
  • 2015-10-08 CN CN201580058490.3A patent/CN107076385A/zh active Pending

Patent Citations (1)

Non-Patent Citations (1)

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