• 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 a light device (1) for scanning a motor vehicle, comprising at least one light source (2) capable of emitting light rays (9), characterized in that it comprises a conversion element (5). wavelength device arranged to receive the light rays (9) on an area (10) and to re-emit light radiation to produce a light beam, in that the device (1) further comprises a folding element (3) ) light rays (9) to the conversion element (5), and scanning means (4) configured to scan the folding element (3) with the light rays (9) in a first direction, the scanning light rays (9) occurring between extreme positions (12, 13) of these light rays (9) in said first direction, the folding element being configured to deflect the light rays (9) when in these extreme positions (12, 13) towards a central portion (11 ) of the region (10) of the conversion element (5) so as to form the central part of the light beam.
    公开号:FR3047542A1
    申请号:FR1650964
    申请日:2016-02-08
    公开日:2017-08-11
    发明作者:Loic Boinet
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    Scanning light device, especially for a motor vehicle, provided with a folding element of light rays, and projector comprising such a light device.
    The present invention relates to a scanning light device, in particular for a motor vehicle, provided with a folding element of light rays, and a projector comprising such a light device.
    Motor vehicle headlamps are provided with one or more optical modules arranged in an enclosure closed by an ice so as to obtain one or more light beams at the exit of the headlamp. In a simplified way, an optical module of the housing notably comprises a light source, for example one (or more) electroluminescent diode (s), which emits light rays, and an optical system comprising one or more lenses and, optionally an optical element, for example a reflector, for orienting the light rays from the light sources, to form the output light beam of the optical module.
    In addition, other technologies can be used for these devices. Thus, there are laser diodes that can advantageously replace the light emitting diodes. However, the usual lasers are of a color that does not correspond to the regulatory colors of such projectors. The module then comprises a wavelength conversion element, which receives the light rays from the laser source and which re-emits them in white light to a projection optical system and thus forms part of the light beam of the projector.
    To illuminate a wide area of the conversion element with light rays, light ray scanning means are required. The scanning is performed at a frequency large enough that the human eye does not perceive the movement and sees a continuous illumination of the beam leaving the module. The scanning amplitude defines the displacement of light rays in space and therefore the size of the illuminated area on the conversion element. In other words, for a one-dimensional scan, the rays move between two extreme positions. Thus, the spokes pass substantially through all the positions situated between these two extreme positions, and in particular by one or more central positions with respect to the extreme positions, and which are central with respect to the scanning means.
    The known scanning means are, for example, elements of the MEMS type (for "Micro-Electro-Mechanical-Systems" or English-speaking microsystems), comprising one or more micro-mirrors which reflect the rays on the zone. These micro-mirrors are for example animated by at least one rotary movement about an axis which causes the scanning of the zone in a first direction. A second micro-mirror or other rotational movement of the first mirror about a second axis perpendicular to the first axis produces a scan in two directions.
    The scanning by the rays is effected from one edge to the other of the illuminated area of the conversion element. However, the scan can not have a constant speed across the width of the area. Indeed, the scan must stop at each edge of the area, to start in another direction to the other edge. In other words, the light rays are stopped in the extreme position to scan the area to the other extreme position. As a result, the illumination re-emitted by the conversion element is not uniform, the illumination of the edge of the illuminated zone being more intense than that of its central part, the light rays passing more rapidly through the central positions.
    However, we rather want to obtain a light beam whose central portion is brighter than the sides, in particular to meet the regulations in force. The invention therefore aims to obtain a luminous device that improves the situation and avoids the aforementioned defects, in order to obtain a lighting that meets these regulations, which require more intense lighting on the central part than on the sides.
    For this, the invention relates to a scanning light device for a motor vehicle, comprising at least one light source capable of emitting light rays.
    The device is notable in that it comprises a wavelength conversion element arranged to receive the light rays on an area and to re-emit light radiation to produce a light beam, in that the device further comprises a element for folding the light rays towards the conversion element, and scanning means configured to scan the folding element with the light rays in a first direction, the scanning of the light rays being effected between extreme positions according to said first direction, the folding element being configured to deflect the light rays which are at said extreme positions towards a central portion of the region of the conversion element so as to form the central portion of the light beam.
    Thus, the more intense extreme positions of the light rays are deflected towards the central part of the conversion element, and are thus re-emitted by the conversion element in the central part of the light beam produced by the device. In this way, a light beam is obtained with a greater luminous intensity in the center than on the sides.
    According to various embodiments of the invention, which may be taken together or separately: the scanning of the light rays taking place passing through central positions of the light rays, said central positions being located substantially in the middle of the extreme positions, folding element is configured to deflect the light rays which are at said central positions towards the edges of the zone so as to form the sides of the light beam, - the folding element is configured to deflect the scanned light rays from a first position extreme to a central position on the area, such that these deviated light rays scan the area from the central portion of the area to a first edge of the area, and to deflect light rays swept from said central position to at a second extreme position opposite the first extreme position on the zone, so that these deflected light rays scan the area from the central part of the area to a second edge of the area opposite to the first edge, the folding element is used to reverse in the scanning direction the distribution of the the luminous intensity produced on the conversion element by the scanning means and the light rays, - the scanning amplitude defines the displacement of the light rays, and therefore the central and extreme positions they take during the scanning, central positions are in the center of the scan, and the extreme positions are at the ends of the scan, - the folding element is positioned on the optical path of the light rays, between the scanning means and the conversion element, - the element of folding comprises two reflective faces, - the two reflective faces are adjacent and form a V, the interior of the V being intended to reflect light rays x, - the folding element is arranged in the axis of the scanning means so that the vertex of V receives the central positions of the light rays, - the folding element is a mirror provided with two planes forming the two faces reflective, - the folding element comprises a block provided with two faces provided with a reflective coating, in particular aluminum, these faces forming said reflecting faces, - the folding element comprises a block comprising two faces, said block being formed in transparent material to allow total reflection of the light on both sides, - the folding element is a prism whose two sides form the two reflecting faces, - said device comprises a projection optical system arranged at the output of the device to produce at least in part the light beam, - said device comprises a mobile secondary mirror arranged between the folding element and the conversion element according to the path of the light rays, the secondary mirror being configured to deflect the light rays in a second direction, - the folding element is movable and configured to scan the light rays in a second direction, - the folding element is fixed, - the scanning means are configured to scan the light rays in a second direction, - the scanning means are provided with a movable micro-mirror configured to scan the light rays in the first direction - the moving micro-mirror is also configured to scan the light rays along the second direction, the conversion element comprises a substrate and a layer of a photoluminescent material, for example comprising phosphorus, or yttrium garnet and of aluminum called YAG, - the light source is at least a laser diode, - the central part of the zone is defined salt a first direction of extension of said zone, the central part of the zone is defined over the entire extent of the zone in a second direction of extension of said zone, the second direction being different from the first direction; central portion is located substantially in the middle of said zone. The invention also relates to a searchlight or a motor vehicle light comprising such a scanning light device. The invention will be better understood in the light of the following description which is given for information only and which is not intended to limit it, accompanied by the accompanying drawings: FIG. 1 schematically illustrating a side view of a first embodiment of a device according to the invention, - Figure 2 schematically illustrating the device in plan view, the folding element being a mirror, - Figure 3 illustrating schematically, a side view of a second embodiment of a device according to the invention.
    Figures 1 and 3 show a light device 1, in particular for a motor vehicle, according to a first and a second embodiment of the invention. The device 1 comprises at least one light source 2 capable of emitting light rays 9. Here, the light source 2 is for example one or more laser diodes. The light source 2 may also comprise an optical device combining several laser radiations, for example using optical fibers or devices taking advantage of the different polarizations of different laser sources. The light device 1 preferably comprises one or more collimation lenses 6 of the light rays 9 arranged at the output of the source 2.
    The device 1 also comprises a wavelength conversion element 5 configured to receive the light rays 9 on a zone 10, and to re-emit light radiation to produce a light beam, not shown in the figures. The conversion element 5 changes the wavelength of the rays 9 to obtain the desired color for the illumination of the projector, for example in white light. The conversion element 5 is for example provided with a transparent substrate and a layer of a photoluminescent material, for example based on phosphorus.
    In a first variant, the light rays 9 pass through the conversion element 5 by changing the color to form the light beam. In a second variant, the conversion element 5 is configured to deflect the light rays 9, the substrate having the properties of a mirror.
    The device 1 is preferably provided with an optical projection system, not shown in the figures, which serves to project the light beam from the conversion element to the outside of the device. For this, the projection optical system is substantially arranged in the optical axis of retransmission of the light beam of the conversion element.
    The device 1 further comprises a folding element 3 of the light rays 9 towards the conversion element 5, and scanning means 4 configured to scan the folding element 3 with the light rays 9. The scanning means 4 receive the light rays 9 of the source 2 and return it to the folding element 3. Thus, the folding element 3 is positioned on the optical path of the light rays 9, between the scanning means 4 and the light source element. conversion 5.
    The scan 20 is shown in Figure 2, which is a top view of the device 1 of the first embodiment. Scanning is performed at a rate sufficiently high that the eye does not see the scan and the conversion element transmits substantially continuous light rays to the eye. In addition, the amplitude of the scanning 20 defines the displacement of the light rays 9, and therefore the central 14 and extreme positions 12, 13 they take during the scanning 20. The central positions 14 are at the center of the scanning 20, and the end positions 12, 13 are at the ends of the scan 20.
    It is observed that the scanning 20 is carried out in a first direction 18, for example horizontal, so as to obtain a horizontal displacement of the light rays 9 on the zone 10. The spokes 9 scan the folding element 3 between two extreme positions 12 and 13. The two extreme positions 12 and 13 of the spokes 9 are preferably chosen so that the illuminated area covers substantially the entire surface of the folding element 3.
    According to the invention, the folding element 3 is configured to deflect the end positions 12, 13 of the light rays 9 towards a central portion 11 of the zone 10 of the conversion element 5 so as to form the central part of the beam luminous. The central portion 11 is located substantially in the middle of said zone 10 and is defined here in a first direction of extension of said zone 10. Thus, the extreme positions of the scanning 20 whose illumination is more intense because of the movement of the means sweep, form the central portion of the light beam, the latter therefore having a greater light intensity than the other parts of the light beam.
    Preferably, the folding element 3 is also configured to deflect the central positions 14 of the light rays 9 towards the edges 15, 16 of the zone 10 so as to form the sides of the light beam. Thus, the sides of the light beam have a lower intensity than the central portion, because the central positions 14 of the scan 20 have a lower intensity than the extreme positions 12, 13. The folding element 3 and allows to reverse according to the scanning direction 18, the distribution of the light intensity produced on the conversion element 5 by the scanning means 4 and the light rays 9.
    In the first embodiment of FIG. 2, the folding element 3 is a mirror provided with two planes forming the two reflecting faces 21, 22, which are adjacent and form a V. The vertex 23 of the V forms the junction between the two reflecting faces 21, 22, the interior of the V being intended to reflect the light rays 9 towards the conversion element 5.
    The V-shaped mirror is arranged in the axis of the scanning means (4) so that the scanning of the rays is centered on the mirror, and so that the apex 23 of the V receives and reflects the central positions 14 of the scan 20, while the free wings of the V reflect the extreme positions 12, 13. Thus, the central positions 14 of the scan 20 are returned to the two edges 15, 16 of the zone 10.
    In another embodiment, not shown in the figures, the folding element is a prism whose two faces form the two reflecting faces. The prism is configured to operate in the same way as the V-shaped mirror.
    The scanning means 4 are for example provided with a mobile micro-mirror for scanning the folding element 3 by reflection of the light rays 9 towards the folding element 3. The scanning 20 is performed in a first direction 18 of the surface of the folding element 3, which is for example horizontal. The micro-mirror is animated by a periodic movement produced by an actuator (not shown), which uses for example a resonance effect of the micro-mirror caused, for example, by electrodes to make it oscillate. The movement of the micro-mirror is for example made around an axis of rotation orthogonal to the first direction 18 so that the light rays 9 scan the surface of the folding element 3 in said first direction 18.
    In a first embodiment of Figure 1, the folding element 3 is movable and configured to scan the light rays 9 in a second direction 24, preferably substantially perpendicular to the first direction, to produce a ray movement which moves easily on the conversion element 5. The second direction is for example vertical. Thus, a large zone 10 of the conversion element 5 can easily be scanned by the light rays 9. The movement of the folding element 3 is represented by the arrow 8.
    In a second variant embodiment, represented in FIG. 3, a movable secondary mirror 7 is used, which may also be a micromirror. It is for example arranged between the folding element 3 and the conversion element 5. The secondary mirror 7 is configured to move the light rays 9 on the conversion element 5 in the second direction 24. The arrow 17 represents the movement of the secondary mirror 7. The folding element 3 is fixed in this second variant.
    In a third variant embodiment, the scanning means 4 are also configured to scan the conversion element 5 with the light rays 9 in the second direction 24. In other words, it is the same micro-mirror which sweeps the surface of the folding element 3 with the light rays 9 in the two directions 18, 24. The micromirror therefore follows another movement, for example rotation about a second axis of rotation perpendicular to the previous one. Thus, the micro-mirror allows the light rays to scan both horizontally and vertically the conversion element 5. The folding element 3 is also fixed in this third variant.
    In the preceding description, the micro-mirrors mentioned as scanning means are for example of the MEMS type. However, the invention is not limited to this scanning means and can use other kinds of scanning means such as for example a series of mirrors arranged on a rotary member, the rotation of the element generating a scanning of the element of conversion by the light rays.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    CLAIMS:
    Scanning light device (1) for a motor vehicle, comprising at least one light source (2) capable of emitting light rays (9), characterized in that it comprises a conversion element (5) of light length wave arranged to receive the light rays (9) on an area (10) and to re-emit light radiation to produce a light beam, in that the device (1) further comprises a folding element (3) radii light (9) towards the conversion element (5), and scanning means (4) configured to scan the folding element (3) with the light rays (9) in a first direction (18), the scanning light rays (9) occurring between end positions (12, 13) in said first direction (18), the folding element (3) being configured to deflect the light rays (9) which are at said extreme positions ( 12, 13) to a central portion (11) of the zone (10) of the el ment of conversion (5) so as to form the central portion of the light beam.
    [2" id="c-fr-0002]
    2. Luminous device (1) according to claim 1, characterized in that, scanning the light rays (9) taking place through central positions (14) of the light rays (9), said central positions (14) being located substantially in the middle of the extreme positions, the folding element (3) is configured to deflect the light rays (9), which are at said central positions (14) towards the edges (15, 16) of the zone (10) so as to form the sides of the light beam.
    [3" id="c-fr-0003]
    3. Luminous device (1) according to claim 2, characterized in that the folding element (3) is configured to: deflect the light rays (9) scanned from a first extreme position (12) to a central position (14) on the zone (10), so that these deflected light rays scan the area (10) from said central portion (11) of the zone (10) to a first edge (16) of the zone (10). ); and deflecting the scanned light rays from said central position (14) to a second extreme position (13) opposite the first extreme position (12) on the area (10), such that these deviated light rays scan the area ( 10) from the central portion (11) of the zone (10) to a second edge (15) of the zone (10) opposite the first edge (16).
    [4" id="c-fr-0004]
    4. Light device (1) according to any one of the preceding claims, characterized in that the folding element (3) comprises two reflecting faces (21,22).
    [5" id="c-fr-0005]
    5. Light device (1) according to claim 4, characterized in that the two reflecting faces (21, 22) are adjacent and form a V, the interior of the V being intended to reflect the light rays (9).
    [6" id="c-fr-0006]
    6. Luminous device (1) according to claim 5, characterized in that the folding element (3) is arranged in the axis of the scanning means (4) so that the apex (23) of the V receives the positions central (14) light rays (9).
    [7" id="c-fr-0007]
    7. Light device (1) according to claim 6, characterized in that the folding element (3) is a mirror provided with two planes forming the two reflecting faces (21,22).
    [8" id="c-fr-0008]
    8. Light device (1) according to any one of the preceding claims, characterized in that it comprises a projection optical system arranged at the output of the device (1) for producing at least partly the light beam.
    [9" id="c-fr-0009]
    9. Light device (1) according to any one of the preceding claims, characterized in that it comprises a movable secondary mirror (7) arranged between the folding element (3) and the conversion element (5) according to the path of the light rays (9), the secondary mirror (7) being configured to deflect the light rays (9) in a second direction (24).
    [10" id="c-fr-0010]
    10. Device according to any one of claims 1 to 8, characterized in that the folding element (3) is movable and configured to scan the light rays (9) in a second direction (24).
    [11" id="c-fr-0011]
    11. Device according to any one of claims 1 to 8, characterized in that the scanning means (4) are configured to scan the light rays (9) in a second direction (24).
    [12" id="c-fr-0012]
    12. Device according to any one of the preceding claims, characterized in that the scanning means (4) are provided with a movable micro-mirror configured to scan the light rays (9) in the first direction (18).
    [13" id="c-fr-0013]
    13. Device according to any one of the preceding claims, characterized in that the conversion element (5) comprises a substrate and a layer of a photoluminescent material, for example comprising phosphorus or yttrium garnet and aluminum.
    [14" id="c-fr-0014]
    14. Device according to any one of the preceding claims, characterized in that the light source (2) is at least one laser diode.
    [15" id="c-fr-0015]
    Motor vehicle headlamp comprising a light device (1) according to any one of the preceding claims.
    类似技术:
    公开号 | 公开日 | 专利标题
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    EP2803903A1|2014-11-19|Lighting and/or signalling device, in particular for a motor vehicle
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    FR3051540A1|2017-11-24|ELECTROLUMINESCENT DIODE LIGHTING SYSTEM AND SCANNING DEVICE FOR MOTOR VEHICLE PROJECTOR.
    WO2019073147A1|2019-04-18|An oscillating-mirror-based lighting system for a motor-vehicle headlight
    FR3026824A1|2016-04-08|LUMINOUS DEVICE HAVING LIGHT BEAM FOLDING, IN PARTICULAR FOR MOTOR VEHICLE, AND FIRE PROVIDED WITH SUCH A LUMINOUS DEVICE.
    FR3028003B1|2019-08-02|MULTIMODULAR AUTOMOTIVE PROJECTOR WITH MOBILE MIRRORS ACTIONED BY A SINGLE ENGINE
    FR3077117A1|2019-07-26|LUMINOUS MODULE FOR A MOTOR VEHICLE, AND LIGHTING AND / OR SIGNALING DEVICE EQUIPPED WITH SUCH A MODULE
    WO2020216728A1|2020-10-29|Light module
    EP3002503A2|2016-04-06|Dual-function lighting device for motor vehicle, and lamp, in particular a fog lamp, provided with such a light device
    FR3054023A1|2018-01-19|SIGNALING DEVICE FOR A MOTOR VEHICLE, AND SIGNALING LIGHT EQUIPPED WITH SUCH A DEVICE
    FR3062894A1|2018-08-17|LUMINOUS DEVICE OF LASER SCANNING VEHICLE
    FR3047296A1|2017-08-04|METHOD FOR CONTROLLING THE EMISSION OF A BEAM FOR LIGHTING AND / OR SIGNALING OF A MOTOR VEHICLE
    FR3036772A1|2016-12-02|PROJECTOR FOR MOTOR VEHICLE
    同族专利:
    公开号 | 公开日
    EP3203139A1|2017-08-09|
    CN107044609A|2017-08-15|
    US10240744B2|2019-03-26|
    US20170227185A1|2017-08-10|
    FR3047542B1|2020-10-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2581648A1|2011-10-12|2013-04-17|Stanley Electric Co., Ltd.|Vehicle lighting unit|
    WO2015146309A1|2014-03-25|2015-10-01|スタンレー電気株式会社|Headlight|
    WO2016061599A1|2014-10-21|2016-04-28|Zizala Lichtsysteme Gmbh|Method for generating a light distribution on a road using a motor vehicle headlight|
    WO2016087076A1|2014-12-02|2016-06-09|Robert Bosch Gmbh|Illumination device for a vehicle, an illumination arrangement comprising two illumination devices, and a method for operating said illumination arrangement|
    FR2993831B1|2012-07-27|2015-07-03|Valeo Vision|ADAPTIVE LIGHTING SYSTEM FOR MOTOR VEHICLE|
    FR3006746B1|2013-06-11|2017-12-08|Valeo Vision|PROJECTOR FOR A MOTOR VEHICLE COMPRISING A LASER LIGHT SOURCE|
    FR3027654B1|2014-10-24|2019-08-02|Valeo Vision|LIGHTING AND / OR SIGNALING SYSTEM COMPRISING TELEMETRY MEANS|
    FR3030017B1|2014-12-10|2019-10-04|Valeo Vision|LUMINOUS MODULE AND PROJECTOR PROVIDED WITH SUCH A MODULE.|
    FR3046659B1|2016-01-11|2019-11-29|Valeo Vision|LUMINOUS DEVICE PROVIDED WITH A CURVED WAVE LENGTH CONVERTING ELEMENT, AND PROJECTOR COMPRISING SUCH A LUMINOUS DEVICE|
    FR3054642B1|2016-07-29|2020-07-17|Valeo Vision|MOTOR VEHICLE PROJECTOR LIGHTING MODULE WITH VARIABLE OPENING BEAM|WO2018161260A1|2017-03-07|2018-09-13|Goertek Inc.|Laser projection device and laser projection system|
    DE102020114739A1|2020-06-03|2021-12-09|HELLA GmbH & Co. KGaA|Measuring device for measuring a distance to an object|
    DE102020115790A1|2020-06-16|2021-12-16|HELLA GmbH & Co. KGaA|Lighting device and lighting method for vehicles|
    法律状态:
    2017-02-28| PLFP| Fee payment|Year of fee payment: 2 |
    2017-08-11| PLSC| Publication of the preliminary search report|Effective date: 20170811 |
    2018-02-26| PLFP| Fee payment|Year of fee payment: 3 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 5 |
    2021-11-12| ST| Notification of lapse|Effective date: 20211005 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1650964A|FR3047542B1|2016-02-08|2016-02-08|SCANNING LUMINOUS DEVICE, ESPECIALLY FOR MOTOR VEHICLES, EQUIPPED WITH A LIGHT RAY FOLDING ELEMENT, AND PROJECTOR INCLUDING SUCH LIGHTING DEVICE.|FR1650964A| FR3047542B1|2016-02-08|2016-02-08|SCANNING LUMINOUS DEVICE, ESPECIALLY FOR MOTOR VEHICLES, EQUIPPED WITH A LIGHT RAY FOLDING ELEMENT, AND PROJECTOR INCLUDING SUCH LIGHTING DEVICE.|
    EP17153395.3A| EP3203139A1|2016-02-08|2017-01-26|Scanning light device, in particular for a motor vehicle, provided with an element for bending light rays, and headlight comprising such a light device|
    US15/421,526| US10240744B2|2016-02-08|2017-02-01|Headlight with scanning light device|
    CN201710068900.3A| CN107044609A|2016-02-08|2017-02-08|Be provided with light folding element particularly for motor vehicles scan lamp device and include the headlight of the lamp device|
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