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
  • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
  • F21S41/25—Projection lenses
  • F21S41/265—Composite lenses; Lenses with a patch-like shape
• • 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]
  • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/19—Attachment of light sources or lamp holders
• • 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
  • F21S41/27—Thick 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
• • 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
• • 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
  • F21S41/62—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution for adaptation between right-hand and left-hand traffic
• • 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
  • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
  • F21S41/657—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by moving light sources
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2115/00—Light-generating elements of semiconductor light sources
  • F21Y2115/10—Light-emitting diodes [LED]

Definitions

• the present invention relates to a light module for a headlamp of a motor vehicle comprising at least one light source and an optical element for generating a light beam with a partially oblique cut; in particular this optical element can be used to generate a beam with an oblique cut to the left or to the right depending on the type of regulation to which the vehicle is subjected.
• Vehicle lighting systems are subject to different types of regulations depending on the country in which the vehicle is approved.
• the illumination of the dipped beams, or coded beam is shifted to the right by 15 ° in order to illuminate traffic signs and sidewalks or aisles.
• the cut of the code beam is raised to the left.
• the patent application US2008 / 0002420A1 describes a configurable system according to the country's regulations.
• the projector intended to generate the desired configuration, may comprise two different modules and inclined in an opposite manner. These two modules are then selectively illuminated to generate the configuration corresponding to the country's regulations.
• the projector can also have only one module, this module then being mobile. Just turn it to the required inclination. This mobile mechanism is driven by a controller.
• These two embodiments of configuration change are not optimized, neither in terms of size nor in terms of cost.
• the first example requires two modules, only one being used at a time.
• the second example requires a controller.
• the invention proposes a light module for a motor vehicle comprising an optical element intended to generate a beam with an oblique cut, the optical element comprising at least one optical portion having an optical axis, and at least one light source configured to cooperate. with said portion, characterized in that the optical module comprises at least two distinct positions for disposing a light source intended to generate at least the part of the beam comprising the oblique cutoff, the light source occupying one of the two positions, each of the positions being defined on either side of the optical axis of the optical portion so as to generate an oblique cut-off beam to the right in the first position and an obliquely cut beam to the left in the second position.
• the same optical module can be used for the traffic on the left and for the traffic on the right. Therefore, the manufacturer of the projector must only design a single optical element, with unique manufacturing tools (molds for example), to produce a single optical module compatible with different types of traffic.
• the beam advantageously comprises at least one horizontal cutoff portion followed by an oblique cutoff portion, in particular inclined at an angle of 15 ° or 45 °.
• the light module according to the invention can be a lighting and / or signaling module.
• the optical element comprises at least one input surface and at least one output surface provided with a focus, said input surface being located substantially in a plane comprising said focus.
• the first position is to the left of the optical axis of said portion and the second position is to the right of the optical axis of said portion at the input surface of the optical element.
• the two positions of the light source are defined in a vicinity of the focus of the outer surface.
• the distance between the two positions is substantially equal to F tan (1.3 °), F being the thickness of the corresponding elementary portion.
• the orientation of the light source in the first position is between 10 ° and 45 °, preferably between 15 ° and 30 °, in particular equal to 15 °, with respect to a horizontal axis and the orientation of the source in the second position is between -10 ° and -45 °, preferably between -15 ° and -30 °, in particular equal to -15 °, with respect to a horizontal axis.
• the light source consists of a semiconductor chip emitting a light, for example a light emitting diode.
• the light source is a light emitting diode comprising at least one light emitting element whose orientation of the edges of the photoemissive element depends on the angle of the oblique cut.
• the optical portion is a lens.
• the material of the optical portion is PVC, glass, polycarbonate or PMMA (Polymethyl Methacrylate English) or silicone.
• the outer surface of the optical portion is substantially an ellipsoid portion.
• the ellipsoid portion is obtained by deforming an ellipsoid of revolution in a homothetic manner with respect to a plane in order to generate an obliquely cut beam to the right in the first position and an obliquely cut beam to the left in the second position.
• the optical module further comprises a substrate, which substrate has at least one surface intended to receive a light source.
• the invention also relates to a light projector for a motor vehicle comprising at least one optical module according to the invention.
• a light projector comprises:
• said light projector (1) being housed inside the space delimited by the casing and the closure glass, the light projector being arranged in such a way that the rays issuing from said surface output directly reach said closing window.
• the rays emitted by the module at the output of the overall output surface of the module form a portion or the entirety of a lighting beam of the road, signaling, or lighting of the passenger compartment.
• the body of the optical element is divided into five solid elementary portions, each characterized by an entrance surface and an exit surface,
• the five output surfaces are contiguous, to form an overall output surface of the optical element, which is continuous, the five input surfaces are separated from one another, and are substantially aligned with the two tabs, the three intermediate elementary portions each have two walls originating at the entrance surface and extending towards two edges delimiting the exit surface of the same portion, these walls may for example be aluminized, they are intended to prevent the beams produced by a light source placed at an input surface of a portion to pass through the exit surface of an adjacent portion, the two end portion portions have only one wall for to prevent a light source placed at the inlet surface of one of them from irradiating an exit surface of an adjacent elementary portion, since each of the end portions has only a single elemental portion adjacent,
• the light beam can be decomposed into several components, each of which comes from an elementary portion of the module associated with the corresponding LED, the elementary end portion situated to the left of the module and associated with the corresponding end LED can be used to produce a lighting towards the left focusing on the range, this lighting being rather concentrated and intense, the left intermediate elementary portion, associated with the corresponding LED, can be used to produce an extended lighting horizontally to the left, this lighting being rather weak and spread out transversely with respect to the vehicle, the central intermediate elementary portion, associated with the corresponding LED, can be used to produce horizontally extended illumination to the right as well as to the left, this lighting is rather low intensity and spread transversely to the vehicle,
• the elementary end portion is dedicated to produce lighting having an oblique cut compatible with traffic on the right and traffic on the left.
• FIG. 1 is an exploded view of a light module according to the invention
• FIG. 2 is a view from above of an optical element according to the invention
• FIG. 3A is a view similar to FIG. 2, illustrating an example of a trajectory of light beams coming from a first diode of a light module according to the invention
• FIG. 3B is an isolux diagram of the light beam produced by the first diode of FIG. 3A,
• FIG. 4A is a view similar to FIG. 2, illustrating an example of a path of light beams coming from a second diode of a light module according to the invention
• FIG. 4B is an isolux diagram of the light beam produced by the second diode of FIG. 4A
• FIG. 5A is a view similar to FIG. 2, illustrating an example of path of light beams coming from a third diode of a light module according to the invention
• FIG. 5B is an isolux diagram of the light beam produced by the third diode of FIG. 5A.
• FIG. 6A is a view analogous to FIG. 2, illustrating an example of a path of light beams coming from a fourth diode of a light module according to the invention
• FIG. 6B is an isolux diagram of the light beam produced by the fourth diode of FIG. 6A.
• FIG. 7 illustrates the rotation and translation of a light source between two possible positions
• FIG. 8 is a rear view of a portion of the optical element
• FIG. 9A is a partial perspective view of the optical element, illustrating an example of path of light beams coming from a first position occupied by a fifth diode of a light module according to the invention
• FIG. 9B is an isolux diagram of the light beam produced by the entire optical module and whose fifth diode is in a position according to FIG. 8,
• FIG. 10 is a rear view of a portion of the optical element
• FIG. 11A is a partial perspective view of the optical element, illustrating an example of trajectory of light beams coming from a second position occupied by a fifth diode of a light module according to the invention
• - Figure 1 1 B is an isolux diagram of the light beam produced by the entire optical module and whose fifth diode is in a position according to Figure 10.
• FIG. 12 is a perspective view of a light module, illustrating an example of a path of light beams coming from a fifth diode for two distinct positions of a light module according to the invention.
• a light module 1 according to the invention comprises a heat sink 2 connected to a substrate 3, an electronic card 4, of the printed circuit board type, provided with an electrical connector 5, five light-emitting diodes 6 which will be called LED (Light Emitting Diode in English) for the following description, an optical element 7 in transparent material according to the invention and a housing 8 for protection and maintenance, adapted to grip the optical element 7
• the housing 8 is for example fixed to the substrate 3 by means of a first series of screws 9.
• the electronic card 4 is for example anchored in the substrate 3 by means of a second series of screws 10.
• the substrate 3 comprises in in addition to five locations 6a for positioning the diodes 6.
• Such a module 1 is intended to be fixed, for example, inside a vehicle headlamp.
• the optical element 7 of transparent material according to the invention is full and is made for example of PMMA (polymethyl methacrylate), and plays the role of an optical lens.
• This optical element comprises schematically two lateral lugs 1 1, 12 and a central body 13 located between the lugs 1 1, 12.
• the body 13 is bordered by two end arms 14, 15, each connected to a lug 1 1, 12 each of the arms 14, 15 extending in a direction which is perpendicular to that of the tab 1 1, 12 to which it is connected.
• the two lugs 1 1, 12 are strictly aligned, so that the optical element 7 can abut against a flat surface, by means of its lugs 1 1, 12.
• the body 13 of this optical element 7 is divided into five elementary portions 16, 17, 18, 19, 20 full, each characterized by an input surface 21, 22, 23, 24, 25 and an output surface 26, 27, 28 , 29, 30.
• This optical element 7 thus has two elementary end portions 16, 17, forming - the two arms 14, 15 end, and three intermediate elementary portions 18, 19, 20 positioned between the portions 16 , 17 end.
• the five exit surfaces 26, 27, 28, 29, 30 are contiguous to form an overall exit surface of the optical element 7, which is continuous.
• the five input surfaces 21, 22, 23, 24, 25 are separated from each other, and are substantially aligned with the two tabs 1 1, 12.
• Each portion 16, 17, 18, 19, 20 is elongate, the inlet surface 21, 22, 23, 24, 25 and the outlet surface 26, 27, 28, 29, 30 constituting the two ends of each of the portions 16, 17, 18, 19, 20 along their longitudinal axis.
• the three intermediate elementary portions 18, 19, 20 each have two walls 31, 32, 33, 34, 35, 36 originating at the input surface 23, 24, 25 and extending towards two edges delimiting the surface. 28, 29, 30 of the same portion 18, 19, 20.
• These walls 31, 32, 33, 34, 35, 36 which may for example be aluminized, are intended to prevent the beams produced by a light source placed at an inlet surface 23, 24, 25 of a portion 18, 19, 20, to pass through the exit surface of an adjacent portion.
• the two elementary end portions 16, 17 have only one wall 37, 38 intended to prevent a light source placed at the level of the input surface 21, 22, of one of them, to irradiate an exit surface of an adjacent elementary portion, since each of the end portions 16, 17 has only one adjacent elementary portion.
• the walls 31, 32, 33, 34, 35, 36, 37, 38 of two elementary portions 16, 17, 18, 19, 20 adjacent meet by means of a curved wall segment.
• the optical element 7 thus has a series of four recesses 39, 40, 41, 42 aligned alternately with the five elementary portions 16, 17, 18, 19, 20, each recess being thus delimited by a wall of an elementary portion. and by a wall of an adjacent elementary portion.
• Both entrance surfaces 21, 22 of the two elementary end portions 16, 17 are set back from the input surfaces 23, 24, 25 of the three intermediate elementary portions 18, 19, 20.
• the average distance between the entrance surface and the exit surface is substantially constant.
• the inlet surfaces 21, 22, 23, 24, 25 are planar and the outlet surfaces 26, 27, 28, 29, 30 are rounded in shape.
• each exit surface (26, 27, 28, 29, 30) of a portion (16, 17, 18, 19, 20) has a focus that is substantially at the entrance surface (21). , 22, 23, 24, 25).
• the shape of each exit surface is substantially that of an ellipsoid portion.
• each exit surface is at the entrance surface of the same portion.
• the radiator 2 and the substrate 3 constitute a single piece optical element preferably of metal.
• the substrate 3 is similar to a thin plate having a face 43 of implantation provided with a recess 44 whose contour is similar to that of the electronic card 4, the recess 44 being intended to receive the card 4.
• the face 43 has a central protuberance 45 partially bordering the recess 44 and contributing to partially enlarge the edge surrounding the recess 44.
• the five LEDs 6 are secured to the face 43 of the substrate 3, which is provided with the recess 44, at an area outside the recess 44.
• the five LEDs 6 are arranged along the edge delimiting the recess 44, three LEDs 6 being placed on the protrusion 45 and the other two LEDs 6 being placed at the level of the face 43 of the substrate 3 located at a lower altitude than that of the protrusion 45. In this way, two end LEDs 6 frame three intermediate LEDs 6, raised. Each LED 6 has a photoemissive element of substantially square shape and having a small thickness. The five LEDs 6 are rotated differently with respect to the forward direction, ie the transmission direction of the module. In other words, in front view, these LEDs have different orientations.
• these LEDs have different orientations within the projection plane.
• two LEDs can be arranged so that the edges of their light emitting elements present, in front view, a different orientation. These edges can, in front view, make between them an angle of 45 °. This angle reduces the thickness of the beam, the beam being thicker when the LED is vertical and thinner when it is horizontal.
• An angle of 45 ° between the edges of the photoemissive elements of the two LEDs also improves the homogeneity of the beam, without changing its light distribution which is always horizontal.
• These five LEDs 6 are arranged to emit a light beam in the same direction. As illustrated in FIG.
• the optical element 7 according to the invention is fixed on the substrate 3 so that each of the five LEDs 6, secured to the substrate 3, comes to be positioned at a surface of input 21, 22, 23, 24, 25 of the optical element 7, illustrated in Figure 2, so that each LED 6 can send a light beam to the input surface 21, 22, 23, 24, 25 to which it is associated, the beams passing through the inlet surface 21, 22, 23, 24, 25 to then pass through the outlet surface 26, 27, 28, 29, 30 of the same portion.
• the light beams coming from each input surface 21, 22, 23, 24, 25 may either directly reach the corresponding exit surface 26, 27, 28, 29, 30, or may be previously reflected on the walls 31. , 32, 33, 34, 35, 36, 37, 38 before arriving on the exit surface.
• the walls 31, 32, 33, 34, 35, 36, 37, 38 prevent the light beams emitted by an LED 6 placed at an elementary portion 16, 17, 18, 19, 20, to reach the exit surface 26, 27, 28, 29, 30 of an adjacent elementary portion.
• the elementary portions 16, 17, 18, 19, 20 act separately and autonomously, in order to obtain a resulting light beam, without parasitic interference.
• FIGS. 3A to 6B illustrate an example of use of a light module 1 according to the invention, by decomposing the resulting light beam, into several components, each of which comes from an elementary portion 17, 18, 19, 20, of the module 1 associated with the corresponding LED 6.
• the light beam coming from the end elementary portion 16 is illustrated in FIGS. 9A, 9B and 11A, 1B.
• the end elementary portion 17 located to the left of the module 1 and associated with the corresponding end LED 6, can be used to produce a lighting towards the left focusing on the scope. This lighting is rather concentrated and intense.
• the left intermediate elementary portion associated with the corresponding LED 6, can be used to produce horizontally extended illumination to the left. This lighting is rather low intensity and spread transversely to the vehicle.
• the central intermediate elementary portion 19, associated with the corresponding LED 6, can be used to produce horizontally extended illumination as far to the right as to the left. This lighting is rather low intensity and spread transversely to the vehicle.
• the right intermediate elementary portion 18, associated with the corresponding LED 6 can be used to produce extended lighting horizontally to the right. This lighting is rather low intensity and spread transversely to the vehicle.
• the lights generated by the portions 17, 18, 19 and 20 are extended horizontally. They are dedicated to illuminate the road facing the driver. These can be used in particular to generate a portion of the lighting required by the dipped beam of a vehicle.
• the different lighting distributions illustrated in FIGS. 3B to 6B show that these components comprise a horizontal cut, ie there is no light beyond the line indicating the horizontal on the Isolux diagrams of the light beam.
• the crossing lights generally also include a component having an oblique cut to illuminate the panels located on the side of the road, as well as sidewalks or aisles.
• This oblique cut forms an angle with the horizontal cut of the other components illustrated in FIGS. 3B to 6B.
• the angle formed by this oblique cut is preferably + 15 degrees (oblique right side of the beam, raised upwards) for cars designed for traffic on the right, and this angle is preferably -15 degrees (oblique part to left of the beam, raised upwards) for cars designed for traffic on the left.
• the elementary end portion 16 is dedicated to producing lighting having an oblique cut compatible with the traffic on the right and the traffic on the left.
• the input surface 21 of the elementary portion 16 has two distinct positions for disposing an LED intended to generate a light comprising the oblique cut.
• Each of the two positions is defined on either side of the optical axis of the elementary portion 16. It is the position of the source relative to the optical axis which determines the direction of propagation of the rays. In the first position, the LED generates an oblique cut-off light to the right, and in the second position, the LED generates an oblique cut-off light to the left. It is an intense lighting focusing on the scope.
• Figure 7 illustrates the change of position of the LED 6 to move from the first position to the second position.
• the optical axis of the elementary portion 16 is perpendicular to the lines 50 and 51, so as to be perpendicular to the LED 6.
• the photoemissive element of the LED 6 is first rotated about its axis 61 (the trace of the axis, coinciding with the center of the LED, is indicated by 61) in order to correctly orient the distribution of the beam on the road according to the traffic. It is then translated to the right so that the beam propagates to the left.
• the center of the LED 61 is positioned to the left of the optical axis 50 to the left of the optical axis at a distance F tan (1.3 °) of the latter, where F is the thickness of the elementary portion 16.
• the photoemissive element of the LED is inclined with respect to the horizontal axis 51.
• the photoemissive element forms an angle of 15 degrees with the horizontal.
• the amplitude of the rotation to move from the first position to the second position is 150 ° so that the angle formed by the edges of the photoemissive element with the horizontal 51 is -15 °.
• the LED is translated so that its center is to the right of the optical axis of the elementary portion 16.
• the two positions make it possible to obtain beams with oblique cut substantially symmetrical.
• the two positions are located in the vicinity of the focus of the outer surface 26.
• the first position is substantially shifted to the left of the focus and the second position is substantially shifted to the right of the focus.
• the fact that the two positions are close to each other ensures that the optical module is compact.
• the shape of the exit surface 26 of the elementary portion 16 makes it possible to obtain the two oblique cut beams respectively to the right and to the left for each of the positions of the LED.
• the shape of the exit surface 26 is substantially that of an ellipsoid.
• a ray tracing software can be used to determine the necessary modifications to be made to the ellipsoid of revolution to generate the obliquely cut beams corresponding to each of the positions.
• the ellipsoid of revolution is homothetically deformed with respect to a plane in order to generate an obliquely cut beam to the right in the first position and an obliquely cut beam to the left in the second position.
• the deformation of the surface is effected with respect to a direction perpendicular to a plane, which is obtained by:
• Figure 8 is a rear view of the elementary portion 16 with the LED 6 in the first position.
• the LED 6 is positioned on the input surface 21 to the left of the optical axis (not shown in the figure). It is inclined at an angle of 15 degrees to the horizontal axis 51.
• FIG. 9A illustrates the trajectory of the light rays coming from the fifth diode 6 when the latter is in the first position on the input surface 21.
• the diode is positioned to the left of the optical axis 50 and the beam is propagated to the right of the latter. Part of the beam is reflected on the wall 37.
• the distribution of illumination is illustrated in Figure 9B.
• the beam has an oblique cut to the right. The angle of the cut is 15 ° to the horizontal.
• Figure 10 is a rear view of the portion 16 with the LED 6 in the second position.
• the LED 6 is positioned on the input surface 21 to the right of the optical axis (not shown in the figure). It is inclined at an angle of -15 degrees with respect to the horizontal axis 51.
• FIG. 11A illustrates the trajectory of the light beams coming from the fifth diode when the latter is in the second position on the input surface 21.
• the diode is positioned to the right of the optical axis 50 and the beam is propagated to the left of the latter. Part of the beam is also reflected on the wall 37.
• the distribution of the illumination is illustrated in Figure 1 1 B.
• the beam has an oblique cut to the left whose angle of cut is -15 ° relative to the horizontal.
• the optical element 7 is illustrated with the propagation of the light beam in the portion 16 at the right end simultaneously for the two positions of the diode.
• the beam illustrated by dashed lines comes from the first position of the diode.
• the beam propagates to the right to generate oblique cut-off lighting to the right.
• the beam illustrated by the dashes comes from the LED when it is in the second position, to the right of the optical axis.
• the beam propagates to the left to generate oblique cut-off lighting to the left.
• the light beams produced by each LED 6 of the light module 1 pass through only the elementary portion 16, 17, 18, 19, 20 to which the LED 6 is associated, without being able to go towards the exit surface 26, 27, 28, 29, 30 of an adjacent elementary portion 16, 17, 18, 19, 20. It follows that a light module 1 according to the invention is capable of producing a resulting light beam, which is clear and precise, because it lacks any parasitic light beams due to light interferences between the different elementary portions 16, 17, 18, 19, 20 of the module 1.
• the LEDs all have the same reference in the description, in this case the number 6, they can naturally have different structural, geometric and light characteristics within of a same light module 1, the LEDs 6 being chosen according to the specific needs in terms of lighting.
• the optical source is a semiconductor chip emitting a light, for example a light emitting diode.
• a light emitting diode offers a good quality of light beam, while remaining a small size. It is therefore perfectly adapted to a light module according to the invention, whose dimensions must be limited to be, for example, incorporated in a motor vehicle.
• the type of source used in the present invention is not limited to that of a light emitting diode.
• the source may also be an incandescent lamp, a discharge lamp, a laser source, or any type of source for generating a beam having properties similar to the properties described above.
• this lighting device has been described in the context of a device comprising a plurality of optical portions, making it possible to generate all the components required by the dipped beam, this lighting device can also only include the elementary end portion 16. This isolated elementary portion 16 thus forms a separate optical module.
• the manufacturer of the projector must only design a single optical element, with unique manufacturing tools (molds for example), to manufacture a single optical module compatible with different types of traffic. Since it is the position of the light sources relative to the elementary end portion 16 which determines the type of oblique cut beam, the manufacturer of the projector can design two models of substrates 3 on which the light sources are positioned. being designed for traffic on the left and the second being designed for right traffic.
• the optical module according to the invention has a compact geometry, and is therefore compact.
• the rays emitted by the module at the output of the output surface of the module form a portion or the entirety of a beam of road lighting, signaling, or lighting of the passenger compartment.
• the light device may be devoid of a lens, reflector or cover after the exit surface.
• the light device according to the invention has been described in the context of an oblique cut beam, this device can also be adapted to other types of beams with oblique cut, requiring the same optics and different source positions. illuminated to generate respective light beams compatible with different types of regulations.
• the light module according to the invention can be a lighting and / or signaling module.

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• 2015
  • 2015-02-05 FR FR1550888A patent/FR3032514B1/fr not_active Expired - Fee Related
• 2016
  • 2016-02-04 EP EP16705454.3A patent/EP3254019A1/de not_active Withdrawn
  • 2016-02-04 WO PCT/EP2016/052440 patent/WO2016124718A1/fr active Application Filing
  • 2016-02-04 US US15/548,927 patent/US10451238B2/en not_active Expired - Fee Related
  • 2016-02-04 CN CN201680009123.9A patent/CN108633296A/zh active Pending

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