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
  • F21S41/30—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
  • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
  • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
• • 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
  • F21W2102/10—Arrangement or contour of the emitted light
  • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
  • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
  • F21W2102/155—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having inclined and horizontal cutoff lines

Definitions

• the invention relates to the field of lighting, more particularly lighting for motor vehicles.
• the published patent document EP 2309 172 A1 discloses a light projector for a motor vehicle, comprising a light module capable of producing a light beam with horizontal cut-off, corresponding to the lighting function commonly referred to as “code” in French, or even “low”. beam ”in English.
• the module comprises a reflecting surface of the parabolic type comprising several areas suitable, from the light emitted by the light source towards the reflecting surface, to form different specific light images which are superimposed to form the light beam.
• the central zone which is in intersection with the optical axis and the light emitting axis of the light source is configured to form a luminous image with horizontal cut-off, while the lateral zones and adjacent to the zone center form a bright image with an oblique cutoff.
• Such a configuration makes it possible to form several specific light images with a single module, more particularly a single light source and a single reflecting surface. This has an advantage of compactness.
• this configuration imposes certain geometric constraints on the narrow central zone in order to be able to form the light image with horizontal cut-off, which then imposes significant variations in the radius of curvature for the adjacent lateral zones.
• the sharpness of the oblique cut-off of the oblique cut-off light image may prove to be deficient, essentially in that the inclination of the cut-off is ensured by a particular configuration at the lateral zones of the reflecting surface, both at the level of the radius of curvature in a longitudinal plane than of the radius of curvature in a transverse plane.
• the published patent document FR 3074261 A1 relates to a reflector for a lighting device, having several zones or longitudinal facets, and addresses a problem of modification of the profile of the reflector following the application of a varnish, in particular at the junctions. between areas or facets.
• This document provides for a lateral junction edge of one of the zones or facets with another zone or facet to be inclined with respect to the optical axis.
• this solution makes it possible to overcome the problem of variation in geometry after application of the varnish only partially.
• the published patent document FR 3035704 A1 also relates to a reflector for a lighting device, having several zones or longitudinal facets. It also addresses the problem of depositing varnish before applying a metallized layer, in particular at the junctions between zones or facets. It provides for forming a groove along the junction so that the varnish conforms to the profile of the reflector, in particular in the direct vicinity of the junction.
• the object of the invention is to overcome at least one of the drawbacks of the above-mentioned state of the art. More particularly, the object of the invention is to overcome the problem of variation in the geometric profile of a reflector after application of a varnish, when the reflector has several adjacent longitudinal zones.
• the subject of the invention is a light module, in particular for a motor vehicle, comprising a light source capable of emitting light rays; a reflection surface intended to be covered with a varnish and configured to reflect the light rays so as to form a light beam with higher cut-off, said reflection surface comprising a first region extending longitudinally and configured to form a light image at upper cutoff and a second zone and a third zone extending longitudinally along the first zone, respectively on either side of said first zone; remarkable in that the reflection surface has a transverse profile forming a downward step from the first zone towards each of the second and third zones.
• the notion of "descending" in the concept of "descending step” is understood in a direction perpendicular to the reflection surface, in a direction opposite to said surface.
• the first zone is in a central position.
• central position is meant that the area is crossed by the optical axis of the light module.
• the reflection surface forms a cap, the longitudinal profile of which can be parabolic or elliptical.
• the descending profile extends over more than 70% of the longitudinal extent of the first zone.
• each of the descending steps has a height greater than 0.5mm and / or less than 2.5mm.
• each of the descending steps is formed by an outer corner and an inner corner adjacent to said outer corner, each of said corners forming an angle being between 80 ° and 100 °.
• the upper cut-off of the light image with higher cut-off formed by the first zone of the reflecting surface has an inclination of an angle b with respect to a horizontal direction, said first zone having edges lateral forming an inclination of an angle g with respect to a vertical plane parallel to the optical axis, and
• the angle g is measured between the vertical plane in question and a projection of the lateral edges along the optical axis on a plane perpendicular to said axis.
• the angle b is between 15 ° and 45 ° and / or the angle g is greater than or equal to 5 °.
• the reflecting surface comprises a fourth zone extending longitudinally along one of the second and third zones, said fourth zone having lateral edges parallel to the optical axis and the reflection surface having a transverse profile forming a downward step from said one of the second and third zones towards the fourth zone.
• at least one of the second and third zones has an outer lateral edge parallel to the optical axis, the light image of said at least one of the second and third zones has a horizontal upper cutoff, and the fourth area is configured to form an upper seamless bright image.
• the fourth zone is configured to form a light image with a horizontal upper cutoff.
• the second zone and the third zone are configured to form one or more light images without upper cutoff.
• the reflecting surface comprises a fifth zone extending longitudinally along the other of the second and third zones, said fifth zone being configured to form a luminous image without upper cutoff.
• the light source is of the semiconductor type with a flat illuminating surface, said illuminating surface having a front edge inclined at an angle a with respect to a direction perpendicular to the optical axis and in the plane of said illuminating surface.
• the angle a is greater than or equal to 10 ° and / or less than or equal to 45 °.
• the first zone of the reflecting surface, forming the inclined upper cut-off of the upper cut-off light image is directly above the light source.
• the reflection surface is on a reflector made of thermosetting material.
• the measurements of the invention are advantageous in that they make it possible to discharge the geometric and optical disturbances caused by the varnish on the junctions between longitudinal zones of a reflector.
• the fact of providing a descending profile at the junctions makes it possible to put the interior corner in the shadow of the light beam produced by the light source. This thus makes it possible to use only the portion of varnish of thickness decreasing at the level of the outer corner, given that this portion has a greater radius of curvature, laterally spreading the light image produced.
• FIG 1 is a perspective view of a reflector with longitudinal zones
• FIG 2 is a sectional view II-II of the reflector of Fig. 1;
• FIG 3 is a sectional view III-III of the reflector of Fig. 1;
• FIG 4 is a representation of a reflector area, with edges aligned with the optical axis and a descending profile, and producing a slanted cutoff image
• FIG 5 is a representation of a reflector area, with edges inclined relative to the optical axis and profile in descending step, and producing an image with an inclined cutoff;
• FIG 6 is a representation of a reflector area, with edges aligned with the optical axis and V-shaped, and producing a horizontally cut-off image;
• FIG 7 is a representation of a reflector area, with edges aligned with the optical axis and a descending profile, and producing a horizontally cut-off image
• FIG 8 is a representation of a light module according to a first embodiment of the invention.
• FIG 9 is an IX-IX sectional view of the reflector of the light module of Fig. 8;
• FIG 10 is a representation of a light module according to a second embodiment of the invention
• FIG 11 is an XI-XI sectional view of the reflector of the light module of Fig. 10.
• the concepts “front” and “rear” are to be understood according to the main direction of propagation of the light beam along the optical axis.
• the notion of “longitudinal” is understood along the optical axis of the light module. Consequently, the notion of “transverse” is understood to mean perpendicular to the optical axis of the light module.
• the concepts “horizontal” and “vertical” are understood when the light module is in the normal mounting position, as illustrated in the figures.
• the notion of upper cutoff, horizontal or inclined, of a light beam corresponds to an abrupt variation in light intensity, forming a clear border allowing in particular an adjustment of the light beam.
• abrupt change in light intensity is meant a change in the logarithm, to base 10, of the light intensity for an angular change of 0.1 ° in a direction perpendicular to the cutoff which is greater than or equal to 0.13.
• the notion of absence of upper cutoff, horizontal or inclined corresponds to a variation as defined above less than or equal to 0.1; preferably less than or equal to 0.05.
• FIG. 1 illustrates in perspective a reflector with longitudinal zones, potentially according to the state of the art.
• the reflector 2 comprises a substrate 2.1 generally extended with a reflection surface 2.2 on one of the faces of said substrate.
• the reflection surface 2.2 presents a generally parabolic profile with several zones 2.2.1-2.2.5 adjacent to one another extending longitudinally.
• a light source 4 is arranged opposite the reflecting surface surface 2.2 so that said light source illuminates said reflecting surface.
• the light source 4 is located at the focus of the parabolic profile of the reflection surface 2.2.
• Each of the zones 2.2.1-2.2.5 produces a specific light image so that the combination of these light images produces a desired light beam, such as for example a lighting beam with horizontal upper cut-off, possibly with a projection at a central part of the cut.
• each of the zones 2.2.1-2.2.5 presents a specific geometry, so that the junctions between the zones form local geometric variations.
• the substrate 2.1 of the reflector 2 is formed from a plastic material, such as in particular thermoplastic. After injection molding, the reflective surface 2.2 must be covered with a metallized layer in order to give it reflective properties. For this purpose, a varnish-based coating is previously deposited directly on the substrate. This varnish is necessary to achieve a satisfactory surface condition, namely with a reduced roughness compared to that of the raw substrate, that is to say without coating.
• Figures 2 and 3 are two views along sections II-II and III-III of the reflector in Figure 1, illustrating two types of local geometric variation at the junction between two adjacent areas, and more particularly the effect of the aforementioned varnish.
• Figure 2 shows the profile of the reflective surface between adjacent areas 2.2.3 and 2.2.4 ( Figure 1).
• a layer of varnish 6 is present on the reflection surface 2.2, in this case on the areas 2.2.3 and 2.2.4 shown.
• the reflection surface 2.2 forms a step between the zones 2.2.3 2.2.4.
• this local geometrical variation is due to the fact that the zones 2.2.3 and 2.2.4 have distinct geometries.
• the varnish 6 has a non-constant thickness at the level of the step. This variation is mainly due to the phenomena of surface tension and gravity present during the application of the varnish in the liquid phase. Going from the area
• Figure 3 shows the profile of the reflective surface between adjacent areas
• the layer of varnish 6 mentioned above is present on the reflection surface 2.2, in this case on the zones 2.2.4 and 2.2.5 shown.
• the reflection surface 2.2 here forms at the junction between the zones 2.2.4 and 2.2.5 a groove due to a slope inversion of the profile. Going from zone 2.2.4 to zone 2.2.5, it can be observed that the thickness of the varnish gradually decreases up to the groove and then gradually increases again. It can be observed that the outer surface of the varnish has at the level of the groove a radius of curvature greater than that of the reflection surface 2.2 on the bare substrate 2.1.
• FIG. 4 illustrates the effects of the varnish coating on the descending junctions of a reflection zone forming a slanted top cutoff image.
• FIG. 4 illustrates a portion of reflector 2 similar to that of FIG. 1 and of which the reflection surface 2.2 comprises a longitudinal zone with two lateral edges forming descending steps.
• descending step is meant that the transverse profile of the reflection surface forms a descending step, or even a descending step, moving away transversely from the zone in question towards the adjacent zone.
• the concept of descent is to be considered starting from the reflection surface when the latter is directed upwards (as illustrated in FIG. 1).
• Figure 4 also illustrates the light image produced by the area in question, on a frame of reference with a horizontal axis H and a vertical axis V. The intersection of these axes corresponds to the optical axis.
• the light image in continuous line is the theoretical image, that is to say without disturbing effect linked to the variations in thickness of the varnish as described above in relation to FIG. 2.
• the light images in broken line correspond to the images resulting from the disturbing effect linked to variations in the thickness of the varnish.
• the outer surface of the varnish has at the level of the upper corner of the step a radius of curvature greater than that of the reflection surface on the bare substrate. This means that the light rays incident on the side edges of the area will be deflected further laterally, causing horizontal spread and hence horizontal displacement of the upper slant cutoff.
• the inclined upper cut has an inclination b with respect to the horizontal (H).
• This inclination is obtained by an inclination a of the light source 4 with respect to a direction perpendicular to the optical and horizontal axis.
• the inclinations a and b can be identical but not necessarily while remaining close, for example with a difference of maximum 5 °.
• the geometry of the reflection zone can in fact be dimensioned to compensate for a difference between the inclinations a and b.
• Figure 5 is similar to Figure 4 except that the two side edges of the reflection zone are inclined at an angle g with respect to the optical axis, more precisely with respect to a vertical plane parallel to the optical axis.
• Figure 5 is a top view where the side edges of the zones are projected onto a horizontal plane parallel to the optical axis, and thus shows the angle g in that plane.
• the angle g is actually between a vertical plane parallel to the optical axis and the projection of the side edges on a plane perpendicular to said axis.
• This inclination g is close to the inclination a of the light source and therefore also to the inclination b of the upper cutoff. It can be observed that the shift of the bright images is along the direction of the upper cutoff.
• This phenomenon is due to the fact that the two lateral edges of the reflection zone are close to an orientation perpendicular to the longitudinal direction of the light source 4.
• the inclined upper cut-off is produced by an image of the front edge of the light source. light source.
• the transverse profile of the two side edges having radii of curvature greater than on the bare substrate, will spread the light, in particular the light rays coming from the front edge of the light source. This spreading will then take place in a direction perpendicular to the two lateral edges, namely the direction of the front edge of the light source or at least a direction close to that of said front edge.
• Simulations and tests have shown that a difference of maximum 10 ° between the angle of inclination g and the angles of inclination a and b (which are potentially equal) does not substantially affect the horizontal position of the cut-off. superior.
• FIGS. 4 and 5 illustrate the fact of providing a longitudinal zone with an inclined upper cut-off of a reflector with zones of lateral edges inclined in the direction corresponding to the inclination of the cut-off makes it possible not to modify the horizontal position of the inclined cut despite the varnish thickness variations mentioned above.
• Figure 6 illustrates the effects of the varnish coating on the groove junctions of a reflection zone forming an image with a horizontal top cutoff.
• the outer surface of the varnish at the level of the groove has a greater radius of curvature than that of the reflection surface on the bare substrate.
• the profile of the outer surface of the varnish at the level of the groove remains essentially parallel to that of the reflection surface on the bare substrate.
• the thickness of the varnish gradually decreases up to the groove.
• the outer surface of the varnish has, at the level of the groove, a longitudinal profile which is offset with respect to the theoretical profile, namely that of the reflection surface on the bare substrate added to the nominal thickness of varnish. This shift causes a de-focusing of the light rays causing an upward deformation of the upper cutoff, as illustrated by the broken line on the light image represented on the horizontal H and vertical V axes.
• FIG. 7 is similar to FIG. 6 except that the two lateral edges of the reflection zone have junctions no longer forming a groove but indeed forming a downward step.
• the outer surface of the varnish at the level of the outer corner of the step has a radius of curvature greater than that of the reflection surface on the bare substrate. This means that the rays incident at the outside corner of the step will be reflected more laterally and thus spread the light image without modifying the upper horizontal cut-off.
• FIGS. 8 and 9 illustrate a light module with a zone reflector, of the type of that of FIG. 1, according to a first embodiment of the invention.
• FIG. 8 is a schematic representation, seen from above, of the module as well as a schematic representation of the light images produced by the different zones.
• Figure 9 is an IX-IX sectional view of the reflector of Figure 8.
• the light module 101 comprises a reflector 102 with a substrate 102.1 made of plastic, generally extended and advantageously forming a cap.
• the substrate 102.1 comprises a hollow face forming a reflection surface 102.2.
• This reflection surface 102.2 is intended to be covered with a smoothing varnish and then with a metallized coating in order to make it reflective.
• the reflecting surface 102.2 has a generally parabolic longitudinal profile and comprises zones 102.2.1-102.2.7 extending longitudinally and adjacent to each other laterally. Each of the zones 102.2.1-102.2.7 has a specific geometry, so that the junctions between the zones form local geometric variations.
• the light module 101 comprises a light source 104, in this case of the semiconductor type such as in particular a light emitting diode, with a rectangular illuminating surface with an edge with 104.1 and a trailing edge 104.2. These two edges are advantageously parallel.
• the illuminating surface has a main axis parallel to the front edge 104.1. It can be observed that this main axis and therefore the leading edge 104.1 are inclined at an angle ⁇ with respect to a direction perpendicular to the optical axis.
• Zone 102.2.4 of reflection surface 102.2 is in a central position in that it is crossed by the optical axis.
• This area is configured to form a bright image with a slanted top cutoff.
• This image is visible in the representation of the light images with the horizontal axis H and the vertical axis H. The intersection of these axes corresponds to the optical axis of the light module.
• the luminous image with an inclined upper cut-off can be identified by the hatching identical to that of zone 102.2.3.
• the inclined upper cut-off is inclined at an angle b with respect to the horizontal H, this angle being advantageously equal to a.
• the light image in question is predominantly lateral to the vertical axis V, in this case to the right of said axis.
• the upper inclined cut-off intersects, at least approximately, at the intersection of the horizontal axis H and the vertical axis V.
• the position of the light image in question to the right of the vertical axis V corresponds to a lighting function with cut-off for driving on the left, it being understood that the image in question may be situated to the left of said axis.
• Zone 102.2.4 has two side edges inclined at an angle y with respect to the axis optical. The remarks relating to this angle made previously in relation to figure 5 apply to figure 8.
• Zones 102.2.3 and 102.2.5 are adjacent to zone 102.2.4 forming the image with an inclined upper cut-off, on either side of said zone.
• These two areas 102.2.3 and 102.2.5 have outer edges, laterally, parallel to the optical axis. They therefore have generally triangular shapes, possibly truncated.
• These two zones 102.2.3 and 102.2.5, together with the zones 102.2.1, 102.2.2 and 102.2.7, are configured to form a luminous image without upper cutout and extended laterally. This luminous image is identifiable by the hatching identical to those on the areas in question. We can observe that the upper part of this light image is below and at a distance from the horizontal H axis.
• Zone 102.2.6 is adjacent to zone 102.2.5, outside, laterally, of said zone. This area produces a bright image with a horizontal top cutoff.
• the upper horizontal cut-off is essentially at the level of the horizontal axis H.
• the light image in question is laterally shifted away from the light image with an inclined top cut-off, so that these two light images, in combination, provide the upper part of a lighting function with a horizontal upper cut-off with a projection (commonly referred to by the Anglo-Saxon term "kink").
• the configuration shown is for left-hand drive, with the understanding that a reverse configuration for right-hand drive is possible.
• FIG. 9 is an IX-IX sectional view of the reflector 102 of FIG. 8.
• the transverse profile of the reflection surface 102.2 can be observed, in particular the junctions between the zones.
• the zone 102.2.4 producing the luminous image with an oblique upper cut-off has lateral edges forming steps descending laterally towards the directly adjacent zones, namely the zones 102.2.3 and 102.2.5.
• the combination of the descending steps and the inclination of an angle g of the side edges with respect to the optical axis allows optical disturbances produced by the varnish at the junctions with the adjacent zones do not substantially modify the position of the inclined upper cutoff.
• Zone 102.2.6 producing the luminous image with a horizontal upper cut-off is directly adjacent to zone 102.2.5. Also the zone 102.2.7 participating in producing the light image extended laterally and without upper cutoff is directly adjacent to the zone 102.2.6.
• the junctions between zone 102.2.5 and zone 102.2.6 as well as between zone 102.2.6 and zone 102.2.7 also form descending steps (outward laterally).
• the presence at the outer side edge of zone 102.2.6 allows the optical disturbances produced by the varnish at the junction with the adjacent zone 102.2.7 not to substantially modify the position of the upper horizontal cut-off.
• the inner corner of the downstairs is located in the shadow of the light rays of the light source , meaning that the geometric variations caused by the varnish at this location have no impact on the light image produced.
• Zones 102.2.1, 102.2.2, 102.2.3, 102.5 and 102.2.7 together form the light image extended laterally and without upper cutoff.
• the junctions between these areas more specifically from area 102.2.3 to area 102.2.1, and from area 102.2.5 to area 102.2.6, in this case, form descending steps.
• the optical disturbances produced by the varnish at these junctions will laterally shift the light image produced, which is acceptable.
• these junctions do not necessarily have to form descending steps, they can for example form grooves, in which case the image produced will be shifted vertically, which is also acceptable. given the fact that this image does not have a higher cutoff and that it is advantageously at a distance under the horizontal axis H (FIG. 8).
• Figures 10 and 11 illustrate a zone reflector, of the type of that of Figure 1, according to a second embodiment of the invention.
• Figure 10 is a schematic representation, seen from above, of the module as well as a schematic representation of the light images produced by the different zones.
• FIG. 11 is an XI-XI sectional view of the reflector of FIG. 10.
• the reference signs of the first embodiment are used to designate identical or corresponding elements, these numbers however being increased by 100. It is moreover made reference to the description of these elements.
• the central area 202.2.3 of the reflecting surface is configured to produce a slanted top-cut light image and has side edges slanted at an angle y relative to the optical axis.
• the remarks relating to this angle made previously in relation to Figure 5 apply to Figure 10.
• the reflection surface 202.2 comprises two zones 202.2.2 and 202.24 producing a luminous image with a horizontal upper cut-off, these two zones being directly adjacent to the central zone 202.2.3.
• the reflection surface 202.2 includes outer (laterally) areas to form a laterally extended light image without upper cutoff, in this case the areas 202.2.1 and 202.2.5.
• FIG. 11 being a view in section IX-IX of the reflector 202 of FIG. 10, it can be observed that, similar to the first embodiment, the zone 202.2.3 producing the luminous image with oblique upper cut-off has lateral edges forming laterally descending steps towards the directly adjacent zones, namely zones 202.2.2 and 202.2.4. Still similar to the first embodiment, the combination of the descending steps and the inclination of an angle y of the lateral edges with respect to the optical axis allows the optical disturbances produced by the varnish at the level of the junctions with adjacent areas do not substantially change the position of the upper sloping cutoff.
• the zones 202.2.2 and 202.2.4 producing the luminous image with a horizontal top cut-off are directly adjacent to the central zone 102.2.3 and to the outer zones 202.2.1 and 202.2.5.
• the presence of descending steps between the central zone 202.2.3 and the adjacent zones 202.2.2 and 202.2.4 has the effect of putting the inner corner of each of the steps in the shadow of the light beam produced by the light source.
• variations in the thickness of the varnish at these junctions have no impact on the light image produced.
• outer junctions that is to say with the outer zones 202.2.1 and 202.2.5, they are in the form of a descending step, meaning that the progressive reduction in thickness of the varnish towards the outer corner of the each of these steps will spread the light image somewhat without modifying the vertical position of the upper horizontal cutoff.
• the descending step or steps have a height greater than 0.5mm and / or less than 2.5mm.
• Each of the interior and exterior corners advantageously forms an angle of between 80 ° and 100 °.

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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)
• Optical Elements Other Than Lenses (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (5)

Family Cites Families (13)

• 2019
  • 2019-11-29 FR FR1913561A patent/FR3103878B1/fr active Active
• 2020
  • 2020-11-27 EP EP20811665.7A patent/EP4065883B1/de active Active
  • 2020-11-27 JP JP2022531500A patent/JP7313561B2/ja active Active
  • 2020-11-27 CN CN202080083050.4A patent/CN114729736B/zh active Active
  • 2020-11-27 WO PCT/EP2020/083814 patent/WO2021105490A1/fr not_active Ceased

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