• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an optical module (10) for a motor vehicle comprising: at least one light source (16) capable of emitting an initial light beam; a primary optical means (12) capable of receiving said initial light beam and comprising a light source; cutoff member (28, 30) arranged to convert said initial light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cut extending generally transversely, - projection means (14) arranged to project a beam final luminous lens having an upper cut-out formed by an inverted image of the secondary light-cut beam, characterized in that the primary optical means (12) comprises a light deflection member (38) arranged to deflect a portion of the light rays of the light beam initial below the cutoff of the secondary beam towards the projection means.
    公开号:FR3055400A1
    申请号:FR1658120
    申请日:2016-09-01
    公开日:2018-03-02
    发明作者:Yves Gromfeld
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    TECHNICAL FIELD OF THE INVENTION
    The invention relates to an optical module for a motor vehicle intended to project a final light beam with a higher cut-off.
    The invention relates more particularly to an optical module for a motor vehicle comprising:
    - at least one light source capable of emitting an initial light beam,
    a primary optical means capable of receiving said initial light beam and comprising a cut-off member arranged to transform said initial light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cut-out extending generally transversely,
    - A projection means arranged to project a final light beam having an upper cut formed by an inverted image of the secondary light beam cut.
    TECHNICAL BACKGROUND OF THE INVENTION
    There are already known optical modules intended to emit light beams at break. The cutoff profile extends generally transversely so as to mark a border between a low zone which is illuminated by the light beam and an upper zone in which the light beam hardly illuminates. This cut-off thus makes it possible to control the range of the light beam in order to avoid dazzling the drivers of vehicles located in front of the vehicle.
    The low beam function is notably achieved by means of such a cut-off beam. The cut can have a purely horizontal profile, a stepped profile separated by an inclined cut portion, or even a V-shaped profile having a horizontal portion and a rising inclined portion, for example at an angle of 15 ° relative to the horizontal portion.
    Some regulations allow certain points above the cut to be illuminated by the light beam. These points are generally called gantry points, or overhead light in English, because they correspond to the lighting of the area located above other vehicles, at the place where certain traffic signs are arranged on gantries above the road.
    The position of the portal points relative to the vehicle, as well as the light intensity with which they are lit are imposed by very strict regulations.
    It has already been proposed to produce the lighting for these portal points by modifying the structure of a projection lens of the optical module.
    However, the projection lens is directly visible from outside the vehicle. Such a change in the structure of the lens is therefore perceptible to an outside observer. These solutions are therefore not aesthetically satisfactory.
    It has also been proposed to arrange mirrors to reflect light rays upwards towards the portal points.
    However, such a solution requires the use of an additional reflection element which is attached to the optical module. Such an element is bulky and expensive to install.
    BRIEF SUMMARY OF THE INVENTION
    The present invention provides an optical module of the type described above, characterized in that the primary optical means comprises a light deflection member arranged to deflect part of the light rays of the initial light beam below the cut of the secondary beam in the direction projection means.
    According to other characteristics of the invention:
    - The primary optical means is a solid part made of a translucent or transparent material;
    the cutting member is formed by a notch made in a lower face of the primary optical means which has an upper transverse cutting edge, the profile of which corresponds to the shape of the predetermined cut, the cutting profile possibly being a straight profile or alternatively, a profile having a horizontal portion and an oblique portion making an angle with the horizontal portion, in particular an angle of 15 °;
    - the cutting edge is formed at the intersection between:
    a first upstream interception face, in particular substantially horizontal, which is arranged to totally reflect the light rays coming from the light sources above the cutting edge in the direction of the projection means, and
    a second downstream face, in particular substantially vertical, which extends below the cutting edge, this second downstream face being arranged so as not to intercept any of the light rays not being deflected by the deflection member ;
    the deflection member is formed by an escape face produced in the primary optical means, in particular upstream of the cutting edge, in particular in the interception face, the escape face forming an angle with the face d interception so as to transmit part of the initial beam outside the primary optical means, in particular below the cutting edge, for example towards the second downstream face of the breaking member;
    - the exhaust face is made in a bulge projecting outside under the interception face
    - The exhaust face is made in a notch made in the hollow in the interception face;
    - the light rays deflected by the deflection member are projected above the cut-off line of the final beam, to perform a regulatory function called portal points, the deflected light rays exiting through the exhaust face being directed in particular towards the downstream face of the breaking member, the exhaust face cooperating with the downstream face so that the light rays deflected by the exhaust face and passing through said downstream face portion achieve said regulatory function of portal points;
    the primary optical means comprises at least one collimating member, in particular a collimator, for collimating the light rays emitted by an associated light source;
    - The primary optical means comprises a total internal reflection face which is arranged to receive the collimated light beam and to focus it at the level of the breaking member;
    - The optical module has an outlet face arranged downstream of the breaking device;
    - The projection means is focused at the cutoff member;
    - The projection means has a transverse focal line which coincides with the edge of the cut-off member;
    - The projection means is formed by a lens.
    The invention also relates to a light device for a motor vehicle comprising a first optical module, and comprising a second optical module capable of producing a segmented beam intended to be lit jointly with the light beam projected by the first optical module to perform a function of regulatory crossing type lighting by superposition of the two light beams.
    BRIEF DESCRIPTION OF THE FIGURES
    Other characteristics and advantages of the invention will appear during the reading of the detailed description which will follow for the understanding of which reference will be made to the appended drawings in which:
    - Figure 1 is a perspective view from above which represents an optical module produced according to the teachings of the invention, the light sources having been omitted for reasons of clarity;
    - Figure 2A is a sectional view along the section plane 2-2 of Figure 1 which shows the path of the light rays in the optical module of Figure 1 from a light source to a final light beam;
    - Figure 2B is a detail view on a larger scale similar to that of Figure 2A which shows an alternative embodiment of the optical module;
    - Figure 3 is a perspective view from below which represents the optical module of Figure 1;
    - Figure 4 is a front view which shows a screen illuminated by the final light beam emitted by the optical module of Figure 1;
    - Figure 5 is a top view which shows a light device of a motor vehicle comprising the optical module of Figure 1 associated with a second optical module to form a regulatory crossing light beam;
    FIG. 6 is a view similar to that of FIG. 4 which represents the screen lit simultaneously by the optical module of FIG. 1 and the second optical module of the light device of FIG. 5.
    DETAILED DESCRIPTION OF THE FIGURES
    In the following description, guidelines will be adopted without limitation:
    - longitudinal directed from back to front according to the direction of exit of the final light beam;
    - vertical directed from bottom to top;
    - transverse directed orthogonally to the longitudinal and vertical directions.
    A longitudinal transverse plane will be called a horizontal plane.
    In the following description, the terms upstream and downstream will be used with reference to the direction of movement of the light rays from a light source to a final light beam.
    The transverse orientation corresponds to the orientation of the horizontal bearing of the cut-off profile of the final light beam. The vertical orientation is used as a geometric reference without reference to the direction of gravity. The vertical orientation is defined as being orthogonal to the horizontal level of the cutoff profile of the final light beam.
    In the following description, elements having the same structure or similar functions will be designated by the same references.
    FIG. 1 shows an optical module 10 for a motor vehicle which is intended to emit a final beam with upper cut-off in a longitudinal direction L.
    It is for example an optical module 10 participating in a low beam function. Such an optical module 10 is then arranged at the front of a motor vehicle (not shown) to illuminate the road in front of the vehicle.
    The optical module 10 mainly comprises a primary optical means 12 and a projection means 14.
    As shown in FIG. 2A, the optical module 10 also includes at least one light source 16, here two light sources 16. The light sources 16 are here formed by light-emitting diodes. There are nine of them here. The light-emitting diodes are all carried by a common printed circuit board which extends in a horizontal plane above the primary optical means 12.
    Each light source 16 is capable of emitting in a controlled manner an initial light beam which is here directed substantially vertically downwards in the direction of an input face 18 of the primary optical means 12.
    The primary optical means 12 is formed in a block by a solid piece made of a translucent or transparent material, such as polymethyl methacrylate (PMMA) or polycarbonate (PC). The primary optical means 12 has, in its rear upper part, said upper horizontal entry face 18.
    The input face 18 is provided with a plurality of collimation members 20 each of which is associated with a light source 16. Each member 20 is here formed by an inlet face portion 18 shaped as a lens for collimating the light rays of the initial light beam emitted by the associated light source 16. Thus, the rays from the light source 16 propagate substantially in a vertical direction in the primary optical means 12.
    The upper input face 18 is arranged vertically in line with a face 22 of internal total reflection which is arranged to receive the initial light beam thus collimated by the collimating member 20. This face 22 of total reflection delimits the primary optical means 12 longitudinally towards the rear. It has a tilted incline shape to reflect the incident light rays generally towards the front towards an exit face 24 which delimits the optical means 12 towards the front.
    The outlet face 24 is here generated by translation of its vertical section, forming a generator, along a concave curvature director extending in a horizontal plane. The light sources 16 are themselves aligned parallel to the curvature of the outlet face 24.
    The primary optical means 12 is equipped with a cut-off member arranged to transform said initial reflected light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cut generally extending transversely.
    The breaking member is formed by a notch 26 formed in a lower face of the primary optical means 12. The notch 26 has a reentrant upper transverse edge 28, called cutting edge 28, the profile of which corresponds to the shape of the predetermined cut. This is a horizontal flat cut.
    The cutting edge 28 is more particularly formed by the intersection between a first upstream face 30 of substantially horizontal interception and a second downstream face 32 substantially vertical which extends below the cutting edge 28.
    The interception face 30 is contiguous with the face 22 of total reflection. It is arranged to totally reflect the light rays of the secondary beam above the edge 28 in the direction of the exit face 24. This interception face 30 thus guarantees that the light rays coming from the light sources 16 are directed above the cutting edge 28. Thus, no light ray intended to form the final cut beam passes through the vertical downstream face 32 of the notch 28.
    The outlet face 24 arranged longitudinally downstream of the cutting edge 28.
    In a longitudinal vertical section plane, as illustrated in FIG. 2A, the face 22 of total reflection is shaped in a parabola so as to focus the light rays reflected at the cutting edge 28.
    The projection means 14 is arranged longitudinally in front of and at a distance from the exit face 24 of the primary optical means 12. The projection means 14 is intended to project a final light beam having an upper cut-off formed by an inverted image of the secondary cut-off light beam projected by the exit face 24 of the primary optical means 12.
    FIG. 4 illustrates the zone 31 illuminated by the final beam on a transverse vertical screen 33 placed 25 meters from the lighting device, perpendicular to the optical axis whose intersection with the screen 33 corresponds to the intersection between the axis abscissa and the ordinate axis. It is observed that the area illuminated by the final beam is bounded upward by a cut line 35. The cut line 28 has a horizontal rectilinear shape. The final beam here is a regulatory crossing beam.
    More particularly, the projection means 14 is formed by a lens made of a piece of transparent or translucent material such as PMMA or PC. The lens has a rear entry face 34 and an opposite projection face 36.
    The entry face 34 is arranged longitudinally at a distance from the exit face 24 of the primary optical means 12 for the light rays exit in the open air before entering the projection means 14.
    The projection means 14 is here formed by a separate piece from the primary optical means 12.
    ίο
    The projection means 14 is focused at the level of the cut-off member. More particularly, the projection means 14 has a cylindrical shape and it has a transverse focal line which coincides with the cutting edge 28. This makes it possible to project a final light beam having a clear cut formed by an inverted image of the cut edge 28. The image is of course inverted by vertical symmetry on either side of a horizontal focal plane passing through the cutting edge 28.
    According to the teachings of the invention, the primary optical means 12 comprises a light deflection member arranged to deflect part of the light rays of the initial light beam below the cut-off of the secondary beam in the direction of the projection means. Thus, these deflected light rays are projected upwards after their passage through the projection means 14 to illuminate portal points 37 arranged vertically above the cut-off line of the final light beam.
    As shown in Figure 4, the portal points 37 are six in number here. A first group of three portal points 37 is aligned at 2 ° above the cut line, a central point and two points 37 arranged 4 ° transversely on either side of the central point. A second group of three portal points 37 is aligned at 4 ° above the cut line, a central point and two points 37 arranged 8 ° transversely on either side of the central point.
    To this end, the deflection member is formed by an exhaust face 38 formed in the interception face 30. The exhaust face 38 more particularly forms an angle with the interception face 30 so as to transmit part of the initial beam outside the primary optical means 12. The light rays coming from the initial collimated beam thus strike the exhaust face 38, directly or after reflection on the face 22 of total reflection, with an angle of incidence less than the angle of refraction so that said light rays pass to through the exhaust face 38 to go towards the downstream vertical face 32, below the cutting edge 28. Said deflected rays thus re-enter the primary optical means 12 to go towards the exit face 24, then towards the projection means 14.
    Since the rays deflected by the exhaust face 38 pass below the cut edge 28, their image by the projection means 14 is projected above the cut line of the final beam. It will be understood that the position of the exhaust face 38 is determined so that the points 37 illuminated by said rays deflected in the final beam correspond to the portal points 37.
    In the example shown in FIG. 2A, the exhaust face 38 is produced in a bulge extending vertically projecting outside under the interception face 30. The bulge more particularly has a vertical longitudinal section in the form of a prism delimited towards the front by said exhaust face 38 and towards the rear by a rear face 40. The rear face 40 of the bulge is advantageously oriented so as to completely reflect the incident light rays in the direction of the exhaust face 38 to participate in the lighting of the portal points 37. The light rays deflected by the deflection member are thus projected above the cutoff line of the final beam, to perform the regulatory function known as the portal point.
    According to a variant of the invention shown in FIG. 2B, the exhaust face 38 is produced in a notch produced in the hollow in the interception face 22. In vertical section, the notch is thus delimited towards the rear by said exhaust face 38.
    As shown in FIG. 3, the exhaust face 38 extends, in a horizontal plane, parallel to the exit face 24 of the primary optical means 12. The outlet face 24 having a curvature in a horizontal plane, the exhaust face 38 itself extends along a curved line. The exhaust face 38 extends continuously opposite several light sources 16, for example six light sources 16. These are the light sources 16 arranged on the left of FIG. 3. Thus, each of these six light sources 16 illuminates an associated portal point.
    In a variant not shown, the exhaust face extends discontinuously under the interception face. Each exhaust face portion is then arranged in coincidence with an associated light source, each portion being separated transversely from the neighboring exhaust face portion.
    As shown in FIG. 5, the optical module 10 described above is for example part of a light device 41 for a motor vehicle comprising said first optical module 10 produced according to the teachings of the invention, and comprising a second optical module 42 able to produce a segmented light beam which is intended to be lit jointly the first optical module 10. The superposition of the light beams projected by the two optical modules 10, 42 makes it possible to perform a lighting function of the regulatory crossing type as illustrated in FIG. 6.
    Thus, the area 31 of the screen 33 illuminated by the final light beam of the first optical module 10 remains as described above. The portal points 37 also remain at their location.
    A second zone 44 illuminated by the second optical module 42 is superimposed with the first zone 31 illuminated.
    This second zone 44 has an upper portion which extends above the cut-off line 35 of the first zone 31 illuminated on one half of the screen 33, here the right half. This said upper portion is bounded upwards by a first upper horizontal line 46 and laterally towards the center of the screen by a second line 48 inclined, for example at 15 °, which crosses the cut line 35 of the first zone 31 substantially in the center of the screen 33.
    Thus, the superposition of the two light beams illuminates a global zone 31, 44 delimited upwards by a delimitation comprising a first horizontal lower bearing 35, formed by the cut line 25 of the first zone 31, a second oblique section 48 which extends the first horizontal bearing 35. This oblique section 48 is formed by the inclined line 48 of the second zone 44. And finally a second upper bearing 46 formed by the upper horizontal line 46 of the second zone 44.
    The first horizontal bearing 31 makes it possible to illuminate the road while avoiding dazzling the drivers of vehicles traveling in the opposite direction, while the second bearing 46 makes it possible to illuminate the side of the road with a greater range. The cut-off profile is here adapted for a vehicle traveling in a country which requires vehicles to drive to the right of the road.
    Optionally, the second optical module 42 can be controlled so that the light beam is moved to the left or to the right depending on the direction of rotation of the vehicle wheels, the final light beam emitted by the first optical module 10 remaining fixed relative to to the vehicle. This makes it possible to give the luminous device 41 a bend light code function, or bending light in English, which makes it possible to optimally illuminate the road when cornering. The light beam can be moved by pivoting the second optical module 42 or by selective lighting of light-emitting diodes forming an illumination matrix of the second optical module 42.
    The optical module 10 produced according to the teachings of the invention makes it possible to form a cut-off beam simultaneously illuminating portal points.
    The cut-off beam and the portal points are simultaneously lit by the same light sources. Thus, this solution is particularly economical and compact since it does not require the use of light sources dedicated to the lighting of the portal points.
    In addition, the member for deflecting the light rays for illuminating the portal points is arranged in the primary optical means 12. This primary optical means 12 is not directly visible to an observer when the optical module 10 is mounted on the vehicle. As a result, the deflection member is not visible and the optical module retains an intact and refined aesthetic appearance.
    Furthermore, the light device 41 implementing the optical module 12 produced according to the teachings of the invention makes it possible to illuminate the portal points 37 in a fixed manner while allowing the realization of a turn code by means of a second optical module 42.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    1. Optical module (10) for a motor vehicle comprising:
    - at least one light source (16) capable of emitting an initial light beam,
    - A primary optical means (12) capable of receiving said initial light beam and comprising a cut-off member (28, 30) arranged to transform said initial light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cut-off s '' extending globally transversely,
    - projection means (14) arranged to project a final light beam having an upper cut-off formed by an inverted image of the secondary cut-off light beam, characterized in that the primary optical means (12) comprises a deflection member (38) of light arranged to deflect part of the light rays of the initial light beam below the cut-off of the secondary beam in the direction of the projection means.
    [2" id="c-fr-0002]
    2. Optical module (10) according to the preceding claim, characterized in that the primary optical means (12) is a solid part made of a translucent or transparent material.
    [3" id="c-fr-0003]
    3. Optical module (10) according to the preceding claim, characterized in that the breaking member is formed by a notch (26) formed in a lower face of the primary optical means (12) which has an upper transverse edge (28) of cut whose profile corresponds to the shape of the predetermined cut.
    [4" id="c-fr-0004]
    4. Module (10) according to the preceding claim, characterized in that the cutting edge (28) is formed at the intersection between:
    - A first upstream interception face (30), in particular substantially horizontal, which is arranged to totally reflect the light rays coming from the light sources (16) above the cutting edge (28) in the direction of the means (14 ) projection, and
    - A second downstream face (32), in particular substantially vertical, which extends below the cutting edge (28).
    [5" id="c-fr-0005]
    5. Optical module (10) according to any one of the preceding claims, characterized in that the deflection member (38) is formed by an exhaust face (38) produced in the primary optical means, in particular in the face (30) interception, the exhaust face (38) forming an angle with the interception face (30) so as to transmit part of the initial beam outside the primary optical means (12), in particular at below the cutting edge (28), for example towards the second downstream face of the cutting member.
    [6" id="c-fr-0006]
    6. Module (10) according to the preceding claim, characterized in that the exhaust face (38) is produced in a bulge extending in particular projecting outside the primary optical means, in particular under the face (30) interception.
    [7" id="c-fr-0007]
    7. Optical module (10) according to claim 5, characterized in that the exhaust face (38) is produced in a notch produced in the hollow in the interception face (30).
    [8" id="c-fr-0008]
    8. Optical module (10) according to any one of the preceding claims, characterized in that the light rays deflected by the deflection member (38) are projected above the line (35) for cutting the final beam, to perform a regulatory function called portal points (37).
    [9" id="c-fr-0009]
    9. Optical module (10) according to any one of the preceding claims, characterized in that the primary optical means (12) comprises at least one collimating member (20), in particular a collimator, for collimating the light rays emitted by a associated light source (16).
    [10" id="c-fr-0010]
    10. Optical module (10) according to the preceding claim, characterized in that the primary optical means (12) comprises a face (22) of total internal reflection which is arranged to receive the collimated light beam and to focus it at the level of the 'cutoff member (28).
    [11" id="c-fr-0011]
    11. Optical module (10) according to any one of the preceding claims, characterized in that it comprises an outlet face (24) arranged downstream of the cut-off member (28).
    [12" id="c-fr-0012]
    12. Optical module (10) according to any one of the preceding claims, characterized in that the projection means (14) is focused at the level of the cut-off member (28).
    [13" id="c-fr-0013]
    13. Optical module (10) according to the preceding claim taken in combination with any one of claims 3 or 4, characterized in that the projection means (14) has a transverse focal line which coincides with the edge (28 ) of the switching device.
    [14" id="c-fr-0014]
    14. Optical module (10) according to any one of the preceding claims, characterized in that the projection means (14) is formed by a lens.
    [15" id="c-fr-0015]
    15. Light device (41) for a motor vehicle comprising a first optical module (10) produced according to any one of the preceding claims, and comprising a second optical module (42) capable of producing a segmented beam intended to be lit jointly with the light beam projected by the first optical module (10) to perform a lighting function of regulatory crossing type by superposition of the two light beams.
    1/4
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    法律状态:
    2017-09-29| PLFP| Fee payment|Year of fee payment: 2 |
    2018-03-02| PLSC| Search report ready|Effective date: 20180302 |
    2018-09-28| PLFP| Fee payment|Year of fee payment: 3 |
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    优先权:
    申请号 | 申请日 | 专利标题
    FR1658120|2016-09-01|
    FR1658120A|FR3055400B1|2016-09-01|2016-09-01|OPTICAL MODULE FOR LIGHTING PORTIC POINTS|FR1658120A| FR3055400B1|2016-09-01|2016-09-01|OPTICAL MODULE FOR LIGHTING PORTIC POINTS|
    EP17184962.3A| EP3290777A1|2016-09-01|2017-08-04|Optical module for illuminating overhead signs|
    CN201710777155.XA| CN108302457B|2016-09-01|2017-08-31|Optical module for illuminating a dome lamp|
    US15/693,629| US10690309B2|2016-09-01|2017-09-01|Optical module for lighting overhead lights|
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