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
  • F21S41/10—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
  • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
• • 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
  • 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
  • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
  • F21S41/32—Optical layout thereof
  • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
• • 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
  • F21S41/36—Combinations of two or more separate reflectors

Definitions

• the invention relates to the technical field of lighting, more particularly automobile lighting.
• the published patent document FR 3 093 789 A1 discloses a double lighting module comprising a first lighting module according to the principle of the aforementioned document WO 2020/025171 A1 and a second lighting module also according to the same principle but opposite to the first lighting module.
• the light source of the second lighting module then shines downward, the projection lens then imaging an illuminated reflective surface inverted relative to the first lighting module and thus producing a lower horizontal cutoff lighting beam, completing the beam lighting with upper horizontal cut-off of the first lighting module to achieve a lighting function of the “road” or “high-beam” type in English.
• This combination of lighting modules is advantageous for carrying out the two functions of low beam and high beam lighting but can present a disadvantage of vertical bulk due to the superposition, in this case in opposite ways, of the two lighting modules.
• the invention aims to overcome at least one drawback of the aforementioned state of the art. More particularly, the invention aims to propose a lighting module capable of producing a compatible lighting beam to achieve a superior seamless lighting function, which is vertically compact.
• At least one light source capable of emitting light rays along a main lighting axis directed upwards when the lighting module is in the operational position
• collector with at least one reflective surface configured to collect and reflect the light rays emitted by the at least one light source into a light beam reflected along the optical axis;
• the at least one reflective surface has an elliptical profile with a first focus located at the level of the at least one light source and a second focus located at the front of the entrance face projection optics.
• the invention also relates to a lighting device for a motor vehicle, comprising a first lighting module configured to project a first light beam with a higher horizontal cut-off, for example according to a code type function; and a second lighting module configured to project a second light beam forming with the first light beam, at least in part, a road-type lighting function; remarkable in that the second module is according to the invention.
• the rays reflected by the front part of the reflective surface 106.1 reaches an area of the entrance face 108.1 adjacent to the upper edge 108.3 and, similarly, the rays reflected by the rear part of the reflective surface 106.1 reach an area of the entry face 108.1 adjacent to the lower edge 108.4 .
• the area of the entrance face 108.1 adjacent to the upper edge 108.3 advantageously comprises said upper edge 108.3.
• the area of the entrance face 108.1 adjacent to the lower edge 108.4 advantageously comprises said lower edge 108.4.
• An upper part of the reflected light beam can be lost and therefore cut by the upper edge 108.3 of said projection lens 108. This cutting of the upper part of the reflected light beam results in a lower cut of the projected light beam, taking into account the inversion due to the projection lens 108.
• This configuration has the effect of defocusing the reflective surface 106.1 illuminated by the light source 104, the rear and front edges of said reflective surface 106.1 then being imaged so that they are brought closer together, leading to a essentially vertical light redistribution consisting of vertically bringing together the light rays coming from the front and rear zones of the reflective surface 106.1.
• Figures 5 and 6 illustrate a lighting module according to a second embodiment of the invention.
• This cut-off of the upper part of the reflected light beam results in a lower cut-off of the projected light beam, taking into account the inversion due to the projection lens 208.
• the vertical focus curve 206.1.2 at the front of the projection lens 208 causes a reduction in the vertical spreading of the projected light beam and causes illumination of a vertically extended part of the entrance face 208.1 of the projection lens 208, favorable to spreading horizontal of the projected light beam, as in the first and second embodiments
• the focus 208.5 of the projection lens 208 is located at the rear of the collector 206 and the reflective surface 206.1, and the projection lens 208 comprises an entrance face 208.1 plane and an exit face 208.2 with a vertical curvature only, that is to say without horizontal curvature.
• the projection lens 208 illustrated thus has zero horizontal optical power.
• cutting off the upper part of the reflected light beam is optional.
• FIG 7 illustrates in perspective and schematically a lighting device comprising several lighting modules, at least one of which conforms to the invention.
• the lighting device 112 comprises a first lighting module 114, similar or identical to the lighting module 2 illustrated in Figure 1.
• Such a lighting module is then configured to produce a projected light beam with an upper horizontal cutoff, preferably flat and commonly designated by the English term “fiat”.
• the light image of such a light beam is illustrated graphically and schematically on an orthonormal HV reference frame, similar to Figures 2, 4, 6 and 8.
• the third lighting module can be configured to produce a light beam with a flat upper horizontal cut-off, similar to the first lighting module 114, in addition to the light beam of said first lighting module, in view to produce the regulatory automotive lighting beam of the “code” type for territories not requiring a projection.
• each lighting module can comprise several light sources arranged side by side and several reflective surfaces also arranged side by side, advantageously formed on the collector.
• the light source(s) are not necessarily located precisely on the optical axis, they can in fact be located below the optical axis.
• the focus of the projection lens is located at the rear of the reflecting surface, it does not necessarily have to be located on the optical axis, it can in fact be located at a distance from said optical axis, for example at above.
• certain geometric simplifications have been made in the embodiments, for purposes of clarity of presentation, it being understood that deviations from these geometric simplifications are possible within the framework of the invention.

Landscapes

• 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=83996607

Family Applications (1)

Country Status (5)

Family Cites Families (9)

• 2022
  • 2022-09-06 FR FR2208905A patent/FR3139375B1/fr active Active
• 2023
  • 2023-09-06 EP EP23767879.2A patent/EP4584531A1/de active Pending
  • 2023-09-06 JP JP2025513668A patent/JP2025527929A/ja active Pending
  • 2023-09-06 WO PCT/EP2023/074488 patent/WO2024052421A1/fr not_active Ceased
  • 2023-09-06 CN CN202380063495.XA patent/CN120167029A/zh active Pending

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