EP3994390A1 - Ensemble de projection de véhicule automobile et procédé de réglage dudit ensemble de projection - Google Patents
Ensemble de projection de véhicule automobile et procédé de réglage dudit ensemble de projectionInfo
- Publication number
- EP3994390A1 EP3994390A1 EP20736284.9A EP20736284A EP3994390A1 EP 3994390 A1 EP3994390 A1 EP 3994390A1 EP 20736284 A EP20736284 A EP 20736284A EP 3994390 A1 EP3994390 A1 EP 3994390A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- assembly
- sub
- projection
- relative
- light beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
- F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates
-
- 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
- F21S41/29—Attachment thereof
- F21S41/295—Attachment thereof specially adapted to projection lenses
Definitions
- the present invention relates to the field of automotive vehicle lighting.
- the invention relates to a projection assembly of a light beam performing a lighting function, for example a dipped beam.
- the invention also relates to a method of adjusting said projection assembly in order to improve the visual appearance of the light beam emitted by said assembly.
- the invention relates to an adjustment device implementing said method.
- optical projection modules designed to emit in particular a low beam or code, or a high beam.
- the projection assembly can include various optical elements.
- the projection assembly can comprise one or more light sources, one or more reflectors, and one or more covers to form the cutoff in the light beam.
- two-function projection assemblies capable of producing a low beam and a high beam.
- the projection assembly can include a removable cover that can go from a first position in which the cover does not obscure the beam produced by the light source of the assembly, to a second position in which it obscures a part. of the emitted beam produced by the source.
- the shape of the cut-off of the dipped beam corresponds to the shape of the cover intercepting part of the beam produced by the light source.
- the cut-off line seen on the dipped beam is the image of an edge of the mask, also called the cut-off edge.
- the passing beam is projected onto the road by a converging lens forming part of the projection assembly.
- the cut-off edge is located close to the "blue" focus, the cut-off line of the dipped beam may have a color close to blue. Likewise, if the cut-off edge is located near the "red” focus, the cut-off line will be colored close to red.
- the color blue is accepted by regulations provided that the intensity of the color blue remains below a limit threshold. Therefore, if the intensity of the blue color exceeds this limit threshold, the light beam will therefore not comply with the regulations. In addition, the color blue degrades the visual comfort of the light beam and is therefore not appreciated by drivers.
- an objective of the invention is to provide a projection assembly making it possible to correct the problem of chromatic aberration or iridescence.
- a first object of the invention is an assembly for projecting a light beam along an optical axis, the projection assembly comprising:
- first sub-assembly for generating light rays
- second sub-assembly a sub-assembly comprising a converging lens
- the first and second sub-assemblies being arranged with respect to each other so that the light rays coming from the first sub-assembly are sent towards the converging lens and so that the light rays leaving said converging lens form the light beam.
- the projection assembly comprises at least one connecting system connecting the first sub-assembly to the second sub-assembly and allowing at least one translational movement of the first sub-assembly and of the second sub-assembly one relative to the other in a first direction parallel to the optical axis, and the connection system comprising a movable locking member between a first position in which the first sub-assembly and the second sub-assembly are stationary one relative to the other and a second position allowing said translational movement.
- connection system the distance, measured in the first direction, between the two sub-assemblies can be adjusted until a light beam is obtained having very little, if at all chromatic aberrations, this which improves the visual appearance of said beam.
- connection system makes it possible to limit the degrees of freedom in the movement and facilitates this adjustment.
- the distance between the two sub-assemblies is adjusted so that the cut-off edge of the cover is close to the focus, the color of which is accepted by regulations.
- the light beam thus formed therefore comprises a cut-off line with little iridescence and exhibiting the tolerated color.
- the light beam therefore meets the regulated colorimetry criteria.
- the solution proposed according to the invention is suitable for all types of caches, including caches with a simple cut-off edge. With the proposed solution, we can do without caches that are certainly efficient, but sophisticated and expensive.
- the projection assembly according to the invention can optionally
- connection system comprises a bore made in one of the first sub-assembly and the second sub-assembly, and an elongated orifice in the first direction and made in the other of the first sub-assembly and the second sub-assembly, the bore and the orifice being disposed face to face;
- the locking member comprises a screw inserted in the bore and in the orifice and movable between the first position in which the screw clamps the first sub-assembly and the second sub-assembly against each other so as to immobilize them relative to each other and the second position in which the screw is loosened so as to allow movement between the first sub-assembly and the second sub-assembly relative to the other; thus, whatever the position of the screw, the first sub-assembly and the second sub-assembly remain linked to one another; in other words, the complete detachment of these two sub-assemblies is avoided during the adjustment of the locking
- the projection assembly comprises a stopper limiting the amplitude of the translational displacement in the first direction of the first sub-assembly and of the second sub-assembly relative to each other thus, the stopper is a safety means ensuring that the translational movement in the first direction of the two sub-assemblies does not exceed a limit beyond which there is a risk of rupture of the connection between said sub-assemblies;
- the stop is arranged so that when the translational movement in the first direction between the first sub-assembly and the second sub-assembly reaches the maximum amplitude, the bore remains in the circumscription of the orifice; at any distance between the two subassemblies, the screw always remains inserted in both the bore and the orifice;
- the projection assembly includes two identical link systems arranged on each side of the optical axis, in particular symmetrically with respect to the optical axis; the two connection systems thus strengthen the connection between the two sub-assemblies;
- the projection assembly comprises at least one translational guide system arranged so as to block the translational movement of the first sub-assembly and of the second sub-assembly relative to each other, in a second transverse direction, in particular substantially perpendicular to the first direction; thus, the translation guidance system blocks the
- transverse displacement between the two sub-assemblies because, in some examples, said transverse displacement is not necessary for correcting the problem of chromatic aberration of the light beam
- the translation guidance system comprises a lug produced on one of the first sub-assembly and the second sub-assembly, and a slot made in the other among the first sub-assembly and the second sub-assembly, said slot extending in the first direction and arranged so that the width of the slot, measured in the second direction, is substantially equal to the transverse dimension of the lug, also measured in the second direction and in that the slot is arranged so as to allow sliding of the lug in the slot in the first direction;
- the projection assembly comprises at least one anti-rotation guide system arranged so as to block rotation of the first sub-assembly relative to the second sub-assembly around a transverse axis, in particular substantially orthogonal, to the first direction; in some examples, the rotation between light sources carried by the first subassembly and the lens carried by the second subassembly causes the path of the light rays exiting the projection assembly to be modified; consequently, the light beam risks losing its shape and / or its luminosity; it is therefore necessary to block said rotation;
- the anti-rotation guide system comprises a finger carried by one of the first sub-assembly and the second sub-assembly, and a bearing surface disposed on the other of the first sub-assembly. assembly and the second sub-assembly, the bearing surface extending in the first direction and the finger resting on the bearing surface so that the bearing surface blocks the movement of the finger in one direction in a third direction perpendicular to the first direction and orthogonal to the transverse axis;
- this is an exemplary embodiment of the anti-rotation guidance system which is simple, but effective;
- the anti-rotation guide system comprises two said bearing surfaces arranged on either side of the finger in the third direction; the anti-rotation guide system thus produced not only prevents the rotation of the two sub-assemblies around the transverse axis, but also the displacement of said sub-assemblies in a third direction, in particular in the vertical; this guidance system therefore provides two different locking functions;
- the anti-rotation guide system comprises a groove comprising a bottom extending along a first plane parallel to the first direction and to the third direction, and two edges extending from the bottom and along a second plane perpendicular to the first plane, and in that the bearing surfaces are disposed respectively on said edges;
- Another object of the invention relates to a vehicle headlight comprising a projection assembly according to the invention.
- the projector according to the invention produces a light beam of good visual quality and free from chromatic aberration problem.
- Another object of the invention relates to a method of adjusting a projection assembly according to the invention. Said method comprises the following steps:
- the adjustment process can continue as long as the visual appearance of the light beam is not satisfactory, in particular as long as the cut-off line still remains iridescent or still has the prohibited color.
- the adjustment method according to the invention may optionally include one or more of the following characteristics:
- said step of unlocking the first sub-assembly relative to the second sub-assembly comprises adjusting the locking member to the second position; furthermore, said step of locking the first sub-assembly relative to the second sub-assembly comprises adjusting the
- the adjustment member comprises a screw
- the adjustment of said member comprises tightening or loosening the screw
- the translational movement of the first sub-assembly and of the second sub-assembly is blocked with respect to each other in at least one direction from among a second direction and a third direction, said second direction being transverse, in particular substantially perpendicular, to the first direction, and the third direction being transverse, in particular substantially perpendicular, to the first direction and to the second direction; in other words, during the step of moving the two sub-assemblies along the optical axis, the movement in the other two directions transverse to said optical axis, called transverse displacement, is prevented; this makes it possible to avoid errors in the formation of the light beam due to the transverse displacement between the first sub-assembly and the second sub-assembly relative to each other; blocking the transverse movement can be achieved by the projection assembly itself or by external means;
- Another object of the invention relates to an adjustment device for the implementation of the adjustment method according to the invention of a projection assembly according to the invention.
- This adjustment device comprises a first support intended to receive the first sub-assembly of the projection assembly and a second support intended to receive the second sub-assembly of the projection assembly, the first support and the second support being arranged so as to be able to move in translation with respect to one another in the first direction and to maintain the connection between said first sub-assembly and said second sub-assembly.
- the adjustment of the distance between the first sub-assembly and the second sub-assembly of said projection assembly is carried out by a movement between the first support and the second support of said adjustment device.
- the first sub-assembly remains linked to the second sub-assembly.
- the adjustment device according to the invention may optionally include one or more of the following characteristics:
- the adjustment device comprises a stop limiting the amplitude of the translational movement of the first sub-assembly and of the second sub-assembly relative to each other in the first direction; thus, the adjustment device imposes a limit on the translational movement of the subassemblies of the projection assembly to avoid breaking the connection between these subassemblies;
- the adjustment device comprises a member for blocking in translation arranged so that when the projection assembly is placed in said device, the translational movement of the first sub-assembly and of the second sub-assembly relative to the other in at least one direction among a second direction and a third direction is blocked, said second direction being transverse to the first direction, and the third direction being transverse to the first direction and to the second direction; in other words, once the projection assembly is mounted in the adjustment device, only the translational movement along the optical axis between the two subassemblies is authorized; the other movements being blocked, the adjustment of the light beam is simplified; in addition, the translational locking member being arranged on the adjustment device, it is therefore not necessary to equip another transverse displacement locking means on the projection assembly, which makes it possible to simplify the structure of said projection assembly;
- the adjustment device comprises a member for locking in rotation arranged so that when the projection assembly is placed in said device, the rotation of the first sub-assembly relative to the second sub-assembly about a transverse axis, in particular substantially orthogonal, to the first direction is blocked; thus, the adjustment device blocks the rotation between the sub-assemblies to avoid irregularities appearing on the light beam;
- the adjustment device comprises an adjustment member for adjusting the locking member to the first position or to the second position;
- the adjusting member comprises a screwdriver head adapted to cooperate with the locking member which is a screw;
- the adjustment device comprises a visual control system for the light beam emitted by the projection assembly and a control unit connected to the first support, to the second support and to said visual control system; according to the signal from the visual control system, said control unit
- the adjustment device controls the movement between the first support and the second support; thus, the adjustment device makes the adjustment process more automated and rapid.
- FIG.1 is a perspective view of an exemplary embodiment of a projection assembly according to the invention
- FIG.2 is a detailed view of Figure 1 showing a connecting system of the projection assembly
- FIG.3 is a perspective view of a second sub-assembly of the projection assembly of Figure 1, said second sub-assembly comprising a converging lens;
- FIG.4 is a top view of a lens holder of the first sub-assembly of Figure 3;
- FIG.5 is a bottom view of the projection assembly of Figure 1, showing a guide system in translation of the movement between the first sub-assembly and the second sub-assembly;
- FIG.6 is a bottom view of the lower frame of the first sub-assembly showing a lug forming part of the guide system in translation;
- FIG.7 is rear view of the lens holder of the second sub-assembly, showing a slot forming part of the guide system in translation;
- FIG.8 is sectional view along a horizontal plane passing through the guide system in translation
- FIG.9 is a side view of the lens holder and the lower frame, said view showing an anti-rotation guide system between the first sub-assembly and the second sub-assembly;
- FIG.10 is a perspective and front view of the lower frame, said view showing a finger forming part of the anti-rotation guide system;
- FIG.1 1 is a rear view of the lens holder, showing a groove forming part of the anti-rotation guide system
- FIG.12 is a sectional view along a horizontal plane passing through the anti-rotation guide system; said is a top view as indicated by arrows in Figure 12;
- FIG.13 is the same view as in Figure 5, but in the absence of the upper frame.
- the projection assembly 1 has an optical axis I extending in a direction from upstream to downstream of said assembly.
- the optical axis I is parallel to a first direction X, also called the longitudinal direction X.
- FIG. 1 Other directions are also shown in the figures.
- One of these directions is a second transverse direction Y, in particular substantially perpendicular, to the longitudinal direction X.
- a third direction Z is transverse, in particular substantially perpendicular, to the longitudinal direction X and to the transverse direction Y.
- the third direction Z s' extends, here, from the bottom to the top of the figures.
- the projection assembly 1 is arranged so that the longitudinal direction X is substantially parallel to the longitudinal axis of a vehicle (not shown) equipped with said assembly.
- the longitudinal direction X and the transverse direction axis Y belong to a horizontal plane.
- the third direction Z being perpendicular to the other two, represents the vertical.
- the terms “horizontal” and “vertical are defined in the operating conditions of the projection assembly in a motor vehicle.
- the term “horizontal” denotes an orientation parallel to the plane of the horizon while the term “vertical” denotes an orientation perpendicular to the plane of the horizon.
- the projection assembly 1 comprises a first sub-assembly 11 generating light rays and a second sub-assembly 12 disposed downstream of said first sub-assembly 11.
- the second sub-assembly 12 comprises a converging lens 120 which projects forward the light rays coming from the first sub-assembly 11 so as to form a light beam performing an optical function.
- a lens holder 121 acts as a support for the lens 120.
- the first sub-assembly 1 meanwhile, comprises optical elements such as light sources, light guides, collimators arranged so as to send the light rays to the converging lens 120.
- the elements optics are protected by a chassis 1 10 composed of two parts: a lower frame 1 12 and an upper frame 1 1 1.
- the detailed composition of the first sub-assembly 1 1 will be described later in the description.
- the first sub-assembly 1 1 and the second sub-assembly 12 are linked together by two identical connection systems 13, arranged on each side of the optical axis I.
- the two systems of link 13 are symmetrical with respect to the optical axis I.
- the connection system 13 here comprises a bore 131 produced in the first sub-assembly 1 January.
- the bore 131 comprises a first bore 131 a formed in the upper frame 1 1 1 and a second bore 131 b formed in the lower frame 1 12.
- the first bore 131 a and the second bore 131 b are also called respectively the 'upper bore 131a and lower bore 131b. These two bores are tapped and have the same diameter.
- first bore 131 a is made in a lug 134 located on a lateral side of the upper frame 1 1 1.
- the second bore 131b is produced in a stud 135 of the lower frame 1 12.
- the stud 135 is visible for example in FIG. 13.
- connection system 13 further comprises an orifice 132 made in the second sub-assembly 12, specifically in the lens holder 121.
- the orifice 132 is elongated in the longitudinal direction X.
- the orifice 132 has an oblong shape that is longer than it is wide.
- the orifice 132 is interposed between the upper bore 131a and the lower bore 131b.
- the orifice 132 is made at a tab 123 extending from a lateral side of the lens holder 121 to the rear.
- the connecting system 13 comprises a locking member 133 which is here a screw 133.
- the screw 133 is inserted into the upper bore. 131 a, in the hole 132 and then in the lower bore 131 b.
- the screw 133 is movable in translation in the vertical direction Z by rotating on itself. To do this, the screw 133 has a thread while the upper and lower bores 131 a, 131 b are threaded.
- the screw 133 plate the ear 134 carrying the first bore 131 a on the tab 123 carrying the orifice 132 and which rests on the stud 135 carrying the second bore 131 b. Described otherwise, the tab 123 is sandwiched between the ear 134 and the stud 135. This plating allows the first sub-assembly 1 1 and the second sub-assembly 12 to be clamped against each other, and so 'immobilize these two sub-assemblies with respect to each other.
- the screw 133 slides in the longitudinal direction X in the orifice 132.
- the latter therefore serves guide for the relative movement between the first sub-assembly 1 1 and the second sub-assembly 12.
- this movement is limited by the contact of the screw 133 with a front edge 135 or with a rear edge 136 of the orifice 132.
- the orifice 132 therefore also serves as the stop delimiting the amplitude of the displacement in translation in the longitudinal direction X of the subassemblies 11 and 12.
- the first position can also be called the low locking position while the second position can also be called the high unlocking position.
- the projection assembly comprises a translational guide system 14.
- said guide system 14 is located at a lower facade S2 of the projection assembly.
- the guide system 14 comprises a lug 141 and a slot 142 in which is engaged said lug 141.
- the lug 141 is made on the lower frame 1 12 of the first sub-assembly 1 1.
- the lug 141 protrudes from a lower face 1 13 of the lower frame 1 12 and extends downward.
- the lug 141 has, here, a substantially rectangular section.
- the slot 142 is made in a lower wall 122 of the lens holder 121.
- the slot 142 opens onto a rear face 123 of the lens holder 121 so as to form a rear opening 125 through which the lug 141 enters the tent 142.
- the width of the slot 142 is substantially equal to the width of the lug 141, also measured in the direction Y.
- the two sides of the 'lug 141 are in contact respectively with the two side edges of the slot 142, which prevents any movement in the transverse direction Y between the lower frame 1 12 and the lens holder 121, therefore between the first sub-assembly 1 1 and the second sub-assembly 12.
- the slot 142 extending mainly in the longitudinal direction X, has a greater length than that of the lug 141. Therefore, the lug 141 can slide in the slot 142 in the longitudinal direction X.
- the lug 141 When the first sub-assembly 11 is connected to the second sub-assembly 12, the lug 141 is engaged in the slot 142.
- the lug 141 slides in the slot 142 at the same time as the movement in the longitudinal direction X between the first sub-assembly 11 and the second sub-assembly 12.
- any movement in the transverse direction Y between the two subassemblies 1 1 and 12 is prevented.
- the translational guidance system 14 ensures that only the movement along the optical axis I between the two sub-assemblies 11 and 12 is possible.
- the projection assembly 1 further comprises two anti-rotation guide systems 15 identical and disposed on each side of the projection assembly 1.
- the two anti-rotation guidance systems 15 are arranged, here, symmetrically with respect to the optical axis I. Given the similarity between the two systems, only an anti-rotation guidance system 15 will be described below. after and this description applies equally to the other.
- the anti-rotation guide system 15 comprises a finger 151 and a groove 152.
- the finger 151 is carried here by the lower frame 1 12 of the first sub-assembly 1 1 while the groove 150 is made in the lens holder 121.
- the finger 151 extends forwardly from a portion located in front of the stud 135 of the connecting system 13.
- the finger 151 has an upper face 154 and a lower face 155 which are relatively flat.
- the groove 150 comprises a bottom 153 extending in a vertical plane parallel to the longitudinal direction X and to the vertical direction Z.
- the groove 150 also comprises two edges 152 extending from the bottom 153 outwards. in the transverse direction Y. In other words, the edges 152 extend along a horizontal plane perpendicular to the vertical plane.
- the two edges 152 are arranged vis-à-vis.
- the distance d, measured in the vertical direction Z, between said edges 152 is substantially equal to the thickness of the finger 151 so that when the finger 151 is inserted into the groove 150, the upper face 154 and the lower face 155 of the finger 151 each bear against a corresponding edge 152.
- Such support from the top and from the bottom of the finger 151 makes it possible to block the rotation of the lower frame 1 12 relative to the lens holder 121 about an axis transverse J, here substantially orthogonal to the longitudinal direction X.
- the anti-rotation guide system 15 with the finger 151 inserted into the groove 150 prevents the first sub-assembly 11 from rotating relative to the second subassembly 12 around a transverse axis J.
- Said transverse axis J shown in Figures 1 1 and 12, is parallel to the transverse direction Y.
- the support at the top and at the bottom of the finger 151 makes it possible to block the movement in the vertical direction Z of the first sub-assembly 1 1 and of the second sub-assembly 12 relative to each other .
- the finger 151 when the finger 151 is inserted into the groove 150, the finger 151 is also resting against the bottom 153 of the groove 150. In this example, it is a right side face 156 of the finger 151 which rests on the bottom 153.
- the support of the fingers 151 on both sides of the lens holder 121 ensures a good hold between the first sub-assembly 1 1 and the second sub-assembly 12.
- the presence of the fingers 151 serves to prevent rotation. of the two sub-assemblies 1 1 and 12 with respect to each other around the vertical direction Z.
- the anti-rotation guide system 15 is arranged so as to allow sliding of the finger 151 in the groove 150 in the longitudinal direction X, therefore a sliding movement in the direction X between the first sub -Assembly 1 1 and the second sub-assembly 12. It should be noted that the finger 151 remains engaged in the groove 150, regardless of the distance between the first sub-assembly 1 1 and the second sub-assembly 12. In other words , the finger 151 remains engaged in the groove 150 during the movement of the first sub-assembly 1 1 and of the second sub-assembly 12 in the longitudinal direction X.
- the first sub-assembly 1 1 is linked to the second sub-assembly 12 by means of the connection system 13.
- the two sub-assemblies 1 1 and 12 thus linked can move relative to each other in the longitudinal direction X, that is to say along the optical axis I.
- This movement can be stopped by the locking member 133, which is here a screw 133 belonging to the connection system 13, when the screw 133 is in the first position.
- the projection assembly 1 is equipped with the translational guide system 14 and the anti-rotation guide system 15.
- the translational guide system 14 blocks the transverse movement of the two sub- sets 1 1 and 12.
- the anti-rotation guide system 15 blocks the rotation between these sub-assemblies around the axis J and their translational movement in the vertical direction Z with respect to one another.
- the translational guide system 14 and the anti-rotation guide system 15 are designed so as to allow the translational movement in the longitudinal direction X between the two sub-assemblies 1 1 and 12.
- the preferred displacement is the approximation or the separation of the first sub-assembly 1 1 and of the second sub-assembly 12 from each other according to optical axis I.
- the purpose of this movement is to adjust the distance between the two sub-assemblies 1 1 and 12, and in particular between optical elements of the first sub-assembly 1 1 and the lens 120 of the second sub-assembly 12.
- the first subassembly 1 1 comprises a first member for generating light rays 2 and a second member for generating light rays 3, hereinafter referred to as the first member respectively. 2 and second member 3.
- the first member 2 is located above the second member 3.
- the first sub-assembly 1 1 further comprises a reflection member 4 disposed between the two members 2 and 3.
- the first member 2 is arranged on one side of the reflection member 4 and the second member 3 on the other side.
- the reflection member 4 is here in the form of a thin metal plate comprising a downstream edge 40 and a reflecting face 41 facing upwards.
- the first member 2 is able to form a cut-off beam performing the function of a passing beam.
- the first member 2 comprises, here, light sources, in particular light-emitting diodes (LED), and collimators 21 arranged in front of said light sources.
- the first member 2 and the reflection member 4 are arranged with respect to each other so that said reflection member 4 forms a bender for the rays coming from the first member 2.
- part of the light rays coming from the first member 2 pass at the level of the downstream edge 40 of the reflection member 4.
- the light rays from said part are parallel to the optical axis I on leaving the converging lens 120 and form the cut-off line of the dipped beam.
- the downstream edge 40 is also called the cut-off edge 40.
- said cut-off edge 40 is linked to the first member 2, it will be called the first cut-off edge 40 hereinafter.
- the latter is capable of forming a beam complementary to the dipped beam generated by the second member 2 so that the combination of said complementary beam with the dipped beam forms a main beam.
- the second member 3 comprises, here, a plurality of light guides (not visible in Figure 14).
- Each light guide includes an input and an output diopter.
- a light source is placed in front of each entrance dioptre.
- the light guides are arranged so that the light rays coming from the light sources propagate inside the guides by total internal reflection in the longitudinal direction X, from upstream to downstream, that is to say. that is to say in the direction of the diopter from entry to exit.
- the second member 3 further comprises a common outlet 31 located downstream of the outlets of the light guides.
- the common outlet 31 here forms a face front of the second member 3 through which the light rays exit from said member 3.
- the common outlet 31 is delimited at the top by an upper edge 30.
- part of the light rays pass through the upper edge 30 and exit parallel to the optical axis I of the converging lens 120.
- the light rays from said part form the cut-off line of the light beam generated by the second member 3.
- the other light rays not passing through the upper edge 30 are projected above the cut-off line.
- the upper edge 30 is hereinafter referred to as the second cut-off edge 30.
- the reflection member 4 is in edge-to-edge contact with the second member 3 so that the first cut-off edge 40 touches the second cut-off edge 30 over the entire length.
- the thickness of the reflector 4 is very small. Viewed from the outside, the first and second cutoff edges 40 and 30 appear to form a single cutoff edge.
- the cut-off line of the light beam generated by the first member 2 is identical to the cut-off line of the light beam generated by the second member 3.
- said cut-off lines merge on the projection, which allows a better junction between the beams generated by said members.
- said lens 120 has a focal plane F located in the vicinity of the first and second cut-off edges 40 and 30.
- the lens 120 exhibits chromatic aberration. This problem is illustrated here by the fact that the first and second cut-off edges 40 and 30 are located at the level of the red focal plane F '. This results in the cut-off line of the light beam having a color close to red, which degrades the quality of said beam, and makes it non-compliant with regulations in the field of vehicle lighting.
- the cut-off line of the light beam may have a color close to blue . This is not not desired because the blue color degrades the visual comfort of the light beam and presents a risk of non-compliance with regulations.
- the projection assembly 1 overcomes this problem. Indeed, thanks to the connection system 13 and the guide systems 14 and 15, one can move the first sub-assembly 11 relative to the second sub-assembly 12 in the longitudinal direction X so that the cut edges 30 and 40 are close to the optimal focal plane F, which makes it possible to greatly attenuate the color of the cut-off line, or even to make this color disappear.
- Said displacement is represented by the double arrow H and may be the subject of a step of a method for adjusting the projection assembly 1 in order to obtain a light beam of good visual quality and devoid of irregularities due to chromatic aberration.
- the adjustment method may firstly comprise a first step during which a light beam emitted by the projection assembly 1 is projected onto a surface remote from said assembly 1.
- Said surface may be a surface of a screen placed in front of the projection assembly 1.
- the distance between the screen and the projection assembly can be between 1m and 2m.
- the beam emitted by the projection assembly 1 can be the passing beam generated by the first member 2, the complementary beam generated by the second member 3, or the beam resulting from the combination of said passing beam and said complementary bundle.
- the beam emitted by the projection assembly 1 is the passing beam generated by the first member 2.
- the first sub-assembly 11 is blocked in movement relative to the second sub-assembly 12, in particular when the screw 133 is in the lower locking position.
- This evaluation includes in particular a detection of the color on the projection.
- the detection can be carried out by a visual control system comprising in particular optical sensors known to those skilled in the art. If a color in the list of unauthorized colors, called a prohibited color, is detected on the projection of the light beam, the beam is considered to be non-compliant.
- the third step comprises loosening the screw 133 so that it is in the upper unlocking position.
- the first sub-assembly 11 is moved in translation relative to the second sub-assembly 12 and / or the second sub-assembly 12 relative to the first sub-assembly 11 in the direction longitudinal X.
- the movement can be a movement towards or away from the subassemblies 11 and 12 from one another.
- a fifth step the visual appearance of the light beam is evaluated again.
- the same evaluation operations of the second step repeat in this fifth step.
- the translational guidance system 14 and the anti-rotation guidance system 15 can be transferred to an adjustment device which is suitable for carrying out the adjustment method described above.
- the adjustment device may include members for locking in translation and in rotation which perform the same functions as said systems 14 and 15.
- the adjustment device may comprise a first support and a second support.
- the first and second supports must be able to move with respect to each other in the longitudinal direction X.
- two said supports can be mounted on a slideway extending in the longitudinal direction X. The supports can thus slide. in the slide.
- the first sub-assembly 11 is mounted in the first support while the second sub-assembly 12 is mounted in the second support.
- the first and second supports of the adjustment device are positioned relative to each other so as to be able to maintain the connection between the first sub-assembly 1 1 and the second sub-assembly 12, that is to say so as to keep the screw 133 engaged both in the bore 131 and in the orifice 132.
- the adjustment device may further comprise an adjustment member for manipulating the screw 133.
- the adjustment member may in particular be an arm equipped with a screwdriver head compatible with the head of the screw 133.
- said adjustment member may intervene in the step of locking and / or the step of unlocking the first sub-assembly 11 relative to the second sub-assembly 12.
- the adjustment device can be automated. It comprises, in particular, a control unit connected to the first support, to the second support, and to the adjustment member.
- the adjustment device may also include the visual control system which performs the step of evaluating the visual appearance of the process. described. In this case, the visual control system is also connected to the control unit.
- control unit can direct some of the operations during the steps of the adjustment process. For example, the control unit receives information from the visual control system and based on this information, the control unit activates the adjustment device so that it loosens the screw 133. The control unit can also control the movement between the first support. and the second support relative to each other.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1907261A FR3098279B1 (fr) | 2019-07-01 | 2019-07-01 | Ensemble de projection de véhicule automobile et Procédé de réglage dudit ensemble de projection |
| PCT/EP2020/068164 WO2021001283A1 (fr) | 2019-07-01 | 2020-06-26 | Ensemble de projection de véhicule automobile et procédé de réglage dudit ensemble de projection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3994390A1 true EP3994390A1 (fr) | 2022-05-11 |
Family
ID=68138489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20736284.9A Pending EP3994390A1 (fr) | 2019-07-01 | 2020-06-26 | Ensemble de projection de véhicule automobile et procédé de réglage dudit ensemble de projection |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11933469B2 (fr) |
| EP (1) | EP3994390A1 (fr) |
| JP (1) | JP7419408B2 (fr) |
| CN (1) | CN114026363B (fr) |
| FR (1) | FR3098279B1 (fr) |
| WO (1) | WO2021001283A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD1019995S1 (en) * | 2021-03-11 | 2024-03-26 | Hasco Vision Technology Co., Ltd. | Lens module for automobile lamp |
| USD1029318S1 (en) * | 2021-03-11 | 2024-05-28 | Hasco Vision Technology Co., Ltd. | Lens module for automobile lamp |
| DE102022102582A1 (de) | 2022-02-03 | 2023-08-03 | Marelli Automotive Lighting Reutlingen (Germany) GmbH | Lichtmodul, Kraftfahrzeugbeleuchtungseinrichtung und Fertigungsverfahren |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1494351A (en) * | 1975-04-18 | 1977-12-07 | Lucas Electrical Ltd | Vehicle lamp assembly |
| JPS562526A (en) * | 1979-06-21 | 1981-01-12 | Ricoh Co Ltd | Focus adjusting method of mtf measuring instrument |
| US4293892A (en) * | 1979-12-18 | 1981-10-06 | Polaroid Corporation | Zoom light apparatus |
| JPH0512884Y2 (fr) * | 1988-07-11 | 1993-04-05 | ||
| JPH06325603A (ja) * | 1993-05-14 | 1994-11-25 | Koito Mfg Co Ltd | 車両用灯具の色替わり機構 |
| FR2742521B1 (fr) * | 1995-12-18 | 1998-03-06 | Valeo Vision | Dispositif de deplacement d'une optique correctrice mobile de projecteur de vehicule automobile |
| US6092914A (en) * | 1998-06-22 | 2000-07-25 | Electronics Theatre Controls | Zoom lighting fixture having multifunction actuator |
| FR2891046B1 (fr) * | 2005-09-20 | 2007-10-19 | Valeo Vision Sa | Projecteur pour vehicule automobile equipe d'un cache a multi-positions. |
| DE102011007131A1 (de) * | 2011-04-11 | 2012-10-11 | Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg | Vorrichtung zum Verstellen eines im Gehäuse eines Scheinwerfers oder optischen Geräts angeordneten optischen Tubus |
| EP2573452B1 (fr) * | 2011-09-26 | 2016-12-28 | Max Lux Corp., Ltd. | Unité optique améliorée et torche dotée d'une telle unité |
| JP2014175102A (ja) | 2013-03-07 | 2014-09-22 | Ichikoh Ind Ltd | 車両用灯具 |
| JP6413409B2 (ja) | 2014-07-09 | 2018-10-31 | セイコーエプソン株式会社 | 照明装置、プロジェクターおよびプロジェクターの制御方法 |
| CZ2015224A3 (cs) | 2015-03-30 | 2017-01-18 | Varroc Lighting Systems, s.r.o. | Způsob a zařízení pro redukci okrajů světelného obrazu světlometu a světlomet |
| US10442340B2 (en) * | 2015-05-25 | 2019-10-15 | Mitsubishi Electric Corporation | Headlight module and headlight |
| AT519673B1 (de) | 2017-06-14 | 2018-09-15 | Zkw Group Gmbh | Kraftfahrzeugscheinwerfer |
| JP7021999B2 (ja) | 2018-04-06 | 2022-02-17 | 株式会社小糸製作所 | 車両用灯具 |
| CN108980775B (zh) * | 2018-07-23 | 2024-06-21 | 常州星宇车灯股份有限公司 | 一种透镜的定位安装系统 |
-
2019
- 2019-07-01 FR FR1907261A patent/FR3098279B1/fr active Active
-
2020
- 2020-06-26 JP JP2021578053A patent/JP7419408B2/ja active Active
- 2020-06-26 CN CN202080047693.3A patent/CN114026363B/zh active Active
- 2020-06-26 US US17/623,773 patent/US11933469B2/en active Active
- 2020-06-26 EP EP20736284.9A patent/EP3994390A1/fr active Pending
- 2020-06-26 WO PCT/EP2020/068164 patent/WO2021001283A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3098279A1 (fr) | 2021-01-08 |
| JP2022538893A (ja) | 2022-09-06 |
| CN114026363B (zh) | 2024-06-21 |
| WO2021001283A1 (fr) | 2021-01-07 |
| US11933469B2 (en) | 2024-03-19 |
| US20220243891A1 (en) | 2022-08-04 |
| FR3098279B1 (fr) | 2021-09-03 |
| CN114026363A (zh) | 2022-02-08 |
| JP7419408B2 (ja) | 2024-01-22 |
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