• 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 ice 4 of a lighting and / or signaling system 1 for a motor vehicle, characterized in that it comprises a first zone 8 having a variable light transmission coefficient. The invention also covers a lighting and / or signaling device equipped with such ice. Application to motor vehicles.
    公开号:FR3025288A1
    申请号:FR1558031
    申请日:2015-08-28
    公开日:2016-03-04
    发明作者:Pierre Albou；Jean-Claude Puente；Olivier Ruat；Damien Chardaire
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    [0001] The technical field of the present invention is that of lighting and / or signaling devices for a motor vehicle, and more particularly ice-creams equipping such lighting devices and / or signaling devices for a motor vehicle, and more particularly ice-creams equipping such devices. devices. A projector mounted on a motor vehicle is conventionally composed of a housing closed by an ice thus delimiting an internal volume in which there is a bulb, a reflector and electric cables. The mechanical part 10 of these components is apparent through the ice and it is then necessary to hide this mechanical part. To do this, the prior art has proposed a retractable projector so as to make invisible the unsightly parts of the projector when the lighting control is inactive. However, this type of retractable system is reserved for high-end or sports vehicles because of the high cost that the retractable function generates. Moreover, this function involves movements implemented by mechanisms whose reliability must be ensured. This problem has also been solved by installing in the internal volume of the projector a mask whose function is to hide the mechanical part of the components mentioned above. The mask experiences a significant temperature range between cold and nocturnal conditions and day and sunny conditions where the mask receives sunlight. This solution then has the disadvantage of requiring a suitable dimensioning which results in an increase in mechanical tolerances to allow the mask to expand whatever the temperature that surrounds it. Moreover, these masks are generally made from a plastic whose surface tends to degrade rapidly under the action of the sun's rays when the rays of the latter are at least partially focused on the mask. Finally, the difference in temperature between the air outside the headlamp and the air present in the internal volume causes condensation on the ice of the water present in the air because the latter is likely to cool very suddenly. The projectors are then provided with an anti-humidity varnish or a system of ventilation of the internal volume of the projector, but the effectiveness of these solutions leaves something to be desired. In addition, the application of an anti-moisture varnish involves an additional cost and complicates the manufacturing process of such a projector and the ventilation system complicates the development, manufacture and installation of the projector. It is therefore necessary to find a reliable and inexpensive solution to hide the mechanical parts inside the projector and make invisible the condensation that forms on the ice inside the projector, without negatively impacting the lighting function dedicated to the projector.
    [0002] The object of the present invention is therefore to solve the disadvantages described above mainly by installing on a mirror of a motor vehicle headlight a system whose transparency is electrically controlled. The subject of the invention is therefore a part of a lighting and / or signaling device for a motor vehicle, this part being arranged to be visible from the outside of the device when this part is mounted on this device, characterized in that it comprises a first zone having a variable light transmission coefficient. By variable is meant the fact that the first zone can take at least two states in which the perception of the light beam is significantly different. It is preferentially envisaged that the variability is of the all-or-nothing type, that is to say a first case in which the light beam passes through the first zone without alteration and a second case in which the light beam does not cross the first zone. . In this second case, the first zone is opaque or reflective. In these two cases, the light beam does not cross the first zone but the invention covers the case where the outer rays are absorbed (opacity) as well as the case where the outer rays are returned or reflected, the latter case avoiding a heating of the room. The variability considered here is activated or deactivated electrically. The piece is visible when it is installed on the device in that it is apparent on examination of the device from outside the device. These include an ice, an intermediate screen or an internal component to the device.
    [0003] According to a first characteristic of the invention, the part is delimited by an inner face and an outer face and wherein the first zone covers the entirety of at least one of said faces. The region with variable light transmittance is thus formed by one of the two faces constituting the part, these faces being the parts of the part which extend in a concurrent and distinct plane with respect to the light source. According to a second characteristic of the invention, the part is delimited by the inner face and the outer face and the first zone partially covers at least one of said faces so as to delimit a second zone distinct from the first zone, the second zone having an invariable light transmission coefficient. It will be understood here that the area with variable light transmission coefficient does not occupy the entire face, the remaining part being formed by the part through which the light beam is not altered by a controllable device. Thus, part of the room and more specifically the second zone is substantially in line with the light source whereas the first zone may be adjacent to the second zone and thus make invisible to the user certain mechanical parts of the projector equipped with such a room. According to another characteristic of the invention, the first zone covers between 10% and 90% of the face concerned. This slice of value guarantees a good level of opacity or reflection while leaving the second zone of the room transparent. Advantageously, the first zone covers at least 30% of the face concerned. According to another characteristic of the invention, the first zone covers a periphery of the face in question. This periphery takes the form of one or more continuous or interrupted bands around the second zone whose luminous transmittance is invariable. This solution finds a particular advantage in hiding the condensation in the headlamp because it is on the outer edges of the part, that is to say at the periphery for example of the ice, that the temperature changes the most abruptly causing thus the formation of water droplets. According to yet another characteristic of the invention, the first zone 3025288 4 covers the inner face of the part. The inner face of the part, in particular the ice, is the face turned towards the housing of the lighting device. It is thus understood that the first zone is installed on the part but inside the projector so as to protect the device implementing the variability of the 5 external aggressions. As an exemplary embodiment, the variability of the light transmission coefficient of the first zone is operated by an electrochromic device, this term encompassing in particular in the description below an electronic ink comprising suspended particles (of the English "Suspended 10 particles device "). This electrochromic device behaves like a capacitor controlled by an electronic control device whose function is to apply to the electrochromic device an electric charge. This electrochromic device takes the form of a solid layer 15 of thickness between 500 nm and 10 pm of the face in question, advantageously 1 pm. By solidarity, for example means a bonding of the layer on the inner face or on the outer face. For example, a molecular adhesion is also meant after deposition in a vacuum, but any other means for connecting this layer to this face enters the field of the integral word. This layer comprises for example tungsten oxide particles in suspension, the position in the layer is reversible when an electric charge is applied thereto. The invention finds particular application when the piece is a transparent or translucent element constituting the lighting and / or signaling device. These include the ice which defines an internal volume of the device relative to the outside of the latter. The invention also finds an interesting application when the part is an intermediate screen, for example installed in the internal volume of the device. The invention also covers a lighting and / or signaling device 30 comprising a first source emitting a light beam installed in an internal volume delimited by a housing and a room according to any one of the characteristics mentioned above.
    [0004] Advantageously, the light beam crosses the first zone. It is thus possible to make the beam visible by driving the first zone. Preferably, the light beam crosses a second zone distinct from the first zone, the second zone having an invariable light transmission coefficient. This reduces the area covered by the first zone to the bare minimum necessary to hide the condensation or mechanisms of the internal components of the projector. In an improvement of the invention, the lighting and / or signaling device comprises a second source emitting a light beam, said first zone being installed in line with the light beam emitted by the second source. This second light source can be a town lamp, a flashing light or a dedicated daylight. Thus, the first controllable area can make apparent an additional function embedded in the lighting device without rendering transparent the rest of the room.
    [0005] The variability of the light transmission coefficient of the first zone is effected by an electrochromic device whose opacity or reflection is activated when the first light source is extinguished. The activation, that is to say the opaque or reflective character, or the deactivation, ie the transparent nature of the zone, are placed under the control of the ignition of the first light source. . In practice, if the user turns on for example its low beam, the first area becomes transparent so as not to hinder the passage of the light beam. Finally, the lighting and / or signaling device is adapted to be mounted adjacent to a bodywork of a vehicle, said body having a hue, and the lighting and / or signaling device is innovative in that the variability of the light transmission coefficient of the first zone is operated by an electrochromic device comprising particles of a hue identical to that of the vehicle body. A first advantage according to the invention resides in the possibility of masking the water droplets resulting from the condensation which forms in a motor vehicle headlamp. Another advantage lies in the possibility of avoiding the use of an additional part such as a mask because the controlled light transmission zone can be placed on the part so as to mask the mechanisms of the internal components of the projector. If, however, a mask is to be held in the projector, the invention extends its life by blocking sun rays that may burn the mask. Other characteristics, details and advantages of the invention will emerge more clearly from a reading of the description given below as an indication in relation to drawings in which: FIG. 1 is a sectional view of a device of FIG. 1 is a front view of the part of FIG. 1, FIG. 3 is a front view of the lighting device and FIG. or signaling according to the invention installed on a vehicle according to a first variant, FIG. 4 is a front view of the lighting and / or signaling device according to the invention installed on a vehicle in a second variant, FIG. 5 is a front view of the lighting and / or signaling device according to the invention installed on a vehicle according to a first mode of operation, FIG. 6 is a front view of the lighting device and or signaling according to the invention installed on a vehicle according to a second mode of operation. It should be noted that the figures detail the invention in detail, said figures can of course be used to better define the invention where appropriate. Figure 1 illustrates a lighting and / or signaling device or projector 1 dedicated to a motor vehicle. This device comprises a housing 2 which forms the rear part of the projector 1. This housing 2 is made from a plastic material and comprises a recessed area which forms an internal volume 3 open on one side. The internal volume 3 is closed by a part 4. The latter is for example a transparent or translucent element. According to an exemplary embodiment, the piece is an ice-cream, in particular made of a transparent material such as glass or a plastic such as polycarbonate. This piece 4 can also be an intermediate screen, that is to say a component installed in the internal volume 3.
    [0006] Inside the internal volume is installed a first source 5 emitting a light beam 6. This source is for example an incandescent lamp, a Xenon lamp or one or more light-emitting diodes. Part of the light beam passes directly through the workpiece 4 and another part of this beam is reflected by a reflector 7 mounted in the internal volume 3 around the first source 5. The workpiece 4 comprises a first zone 8 which has a coefficient of variable light transmission. It is understood here that this first zone 8 can be controlled so as to allow or prohibit the passage of a light beam therethrough. The control or control of the light transmission variability of the first zone is operated electrically. In this embodiment, the first zone 8 covers only part of the room 4. The room 4 comprises a second zone 9 distinct from the first zone 8 but adjacent to the latter. This second zone 9 is inert in the sense that its light transmission coefficient is invariable, that is to say incapable of changing under a voluntary action. It should be noted that the first source 5 and the reflector 7 are arranged so that the light beam passes through mainly or only the second zone 9 because the first zone 8n, the variability of the light transmission of which is controllable, is not intended to form 6. On the other hand, the first controlled zone 8 prevents the introduction of the external light rays 10 to the projector to penetrate inside the internal volume 3. This first zone therefore makes it possible to make the projector invisible. outside part of the internal volume. The piece 4, in particular the ice, has a curved shape and is delimited by an inner face 12 and an outer face 13. The inner face 12 is turned towards the internal volume while the outer face 13 is opposite to the inner face 12 In other words, the outer face 13 faces the external environment 3025288 8 to the projector 1. The piece 4 is finally delimited by a peripheral edge 14 which borders the workpiece 4 and which connects the inner face 12 to the outer face 13. The first zone 8 has a light transmission whose variability is implemented by means of an electrochromic device 11. In this embodiment, the electrochromic device 11 extends on the inner face 12 but the invention also covers the where the electrochromic device is installed against the outer face 13 or both against the inner face 12 and the outer face 13. The electrochromic device 11 takes the form of a layer of epai sseur 10 between 500nm and lOpm integral with the face concerned. Preferably, a thickness of 1 μm is perfectly adapted to the application. In practice, this layer is formed of a plurality of sub-layers which number for example three in number, not including transparent electrodes. In this embodiment, it is the inner face 12. This layer may be sprayed on all or part of the inner face 12 of the part 4. In general, the electrochromic device, and In particular, the layer of particles is affixed to the inner surface 12. Preferably, the electrochromic device is electrically controlled so as to become transparent when it is powered or when it receives an electrical discharge of power while it becomes opaque. or reflective when it is no longer electrically powered or when it receives a reverse electrical discharge to the electrical discharge of power. In this way, when the ignition of the vehicle is cut off and the projector is no longer powered, the electrochromic device is opaque or reflective.
    [0007] The water droplets 15 formed in the cold areas of the projector, for example at the periphery of the latter, are thus made invisible from the outside since the electrochromic device 11 blocks the field of view from the outside of the projector 1. It is therefore preferred to install the electrochromic device 11 at the outer periphery of the part 4 and adjacent to the wafer 14. Figure 2 more particularly illustrates this arrangement. The projector 1 is shown from the front, the piece 4, for example ice, being sealingly mounted on the housing 2. The part 4 is delimited by its external face 13, its inner face 12 and its peripheral edge 14. The first source 5 is also installed so as to cooperate with the reflector 7.
    [0008] The electrochromic device 11 is here installed against the outer face 13 of the part 4 and, as in the variant of Figure 1, covers the first zone 8 peripherally. Thus, the first zone 8 forms a strip which runs on the outer face 13 adjacent to the wafer 14. Thus, the second zone 9 is formed by a central part of the part 4 and this second zone is crossed by the beam light emitted by the first source 5. Figure 3 shows the lighting device and / or signaling 1 installed on a vehicle. According to this first variant, the first zone 8 covers the entirety of the part 4 by using the electrochromic device over the entire surface of the internal face or the external face of the part 4. This is a question here of a situation in which the electrochromic device is rendered opaque or reflective when the first source is extinguished. On the other hand, when the first source is powered, for example by switching on the town lamp, low beam or high beam function, the electrochromic device varies the light transmission coefficient so as to make room 4 and 20 transparent. allow the passage of the light beam provided by the first source. It is thus understood that the light beam intersects the first zone 8 at least at a time when its light transmission coefficient allows the passage of the beam, in other words when the first zone 8 is translucent, advantageously transparent.
    [0009] It will be particularly noted that the headlamp 1 is mounted adjacent a body 16 of a vehicle. In such a situation, the electrochromic device comprises particles that prohibit or allow the passage of the light beam. These particles are tinted so as to maintain an aesthetic uniformity between the bodywork 16 of the vehicle and the part 4. To do this, the hue of the particles is identical to the hue of the bodywork 16. FIG. 4 illustrates a second variant of the device This variant is close to those of FIGS. 1 and 2 in that the piece, for example ice or an intermediate screen, comprises a first zone 8 which has a light transmission coefficient. variable and a second zone 9 inert, that is to say whose light transmission coefficient is fixed or invariable.
    [0010] The second zone 9 takes a semicircle shape described substantially in the center of the room 4. This opening or zone devoid of electrochromic device is practiced at the right of the first source 5 so as to allow in all circumstances, that is, that is to say whatever the level of light transmission variability of the first zone 8, the passage of the light beam emitted by the first source 5. In this embodiment, the lighting and / or signaling device comprises a first source 5 which is a dipped beam. The surface covered by the first zone 8 is, in this example, equal to about 90% of the total surface of the face of the part which serves as a support for the electrochromic device, but the invention finds application at a coverage of 10%. , the latter being interesting when its value is at least 30%. Such an organization has a significant advantage. Indeed, the ease of application of the electrochromic device on the part offers possibilities for delimiting shapes that contribute to improving the exterior aesthetics of the vehicle. The fact that the part has, on the one hand a first zone whose light transmittance is variable or controllable, and secondly a second zone whose transmission coefficient is invariable, makes it possible to draw shapes in a trunk. 5 shows a third variant embodiment in which the lighting and / or signaling device 1 comprises at least a first source 5 and a second source 17. The second source 17 is installed in the internal volume of the projector 1, in an adjacent manner at the first source 5. This second source is here a daylighting device which can take the form of an incandescent lamp, a Xenon bulb or one or more light-emitting diodes. It is also noted that the projector 1 further comprises a third source 18 embedded in the internal volume of the projector 1, this third source being assigned to the flashing function.
    [0011] The first zone 8 is here opaque or reflective thanks to the activation of the electrochromic device, which makes it possible to hide the mechanisms of the first, second or third source, while the second zone 9 is transparent so as to free the passage the light source emitted by the second source 17. In this variant, the first zone 8 is located on the upper part of the part 4 and takes a triangular shape of which one of the sides forms a curve. In a complementary manner, the second zone 9 takes a generally curved shape. The aesthetic effect is thus close to an eyelid appearance.
    [0012] The area covered by the first zone 8 is, in this example, equal to about 50% of the total area of the face of the part 4 receiving the electrochromic device. FIG. 6 shows the lighting and / or signaling device 1 in a fourth variant corresponding to the ignition of the first source 5. The first zone 8 is here deactivated or controlled so as to make this first zone 8 transparent. The light transmission is thus controlled by an electrical control device so as to let the light beam 6 through the room 4. In this example, the entire surface of the room is released and the electrochromic device is invisible.
    [0013] In the case where the first zone supporting the electrochromic device extends over the entirety of the internal face or the external face of the part 4, the transition from the situation illustrated in FIG. 3 to the situation illustrated in FIGS. or 6 operates as follows. When neither source is energized, the electrochromic device is energized so as to render the first zone opaque or reflective, in the case of FIG. 3 the first zone covering the entirety of one of the faces of the part. . With regard to the variant of FIG. 5, when the second source is energized, the electrochromic device is controlled by stopping its power supply 30 so as to make transparent a zone determined advantageously to the right of the second source. With regard to the operating mode of FIG. 6, when the first source is powered, the electrochromic device is controlled by stopping its power supply so as to allow the beam to pass through the entire surface. of the room. Of course, the invention covers the case of a plurality of zones with a coefficient of variable light transmission. Indeed, the same part can take the position of Figures 3, 5 and 6. The room then has separate but adjacent areas each supporting an electrochromic device independently controllable from one area to another. Thus, the piece of the invention may comprise an area with a variable light transmission coefficient made transparent to the ignition of the second source, as well as another area with a variable light transmission coefficient made transparent at the moment of ignition. from the first source, these two zones being made opaque or reflective at the extinction of the first source and the second source. 15
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. Part (4) of a lighting and / or signaling device (1) for a motor vehicle, this part (4) being arranged to be visible from the outside of the device when this part is mounted on this device, characterized in that it comprises a first zone (8) having a variable light transmission coefficient, the part being characterized in that the variability of the light transmission coefficient of the first zone is operated by an electronic ink comprising suspended particles.
    [0002]
    2. Part according to any one of the preceding claims, wherein the part is a transparent or translucent element constituting the device, including an ice.
    [0003]
    3. A lighting and / or signaling device (1) comprising a first source (5) emitting a light beam (6) installed in an internal volume (3) delimited by a housing (2) and a room (4). ) according to any one of the preceding claims.
    [0004]
    4. Device according to claim 3, wherein the light beam (6) crosses the first zone (8).
    [0005]
    5. Device according to any one of claims 3 or 4, wherein the light beam (6) intersects a second zone (9) separate from the first zone (8), the second zone (9) having a light transmission coefficient invariable.
    [0006]
    6. Device according to any one of claims 3 to 5, comprising a second source (17) emitting a light beam, said first area (8) being installed in line with the light beam emitted by the second source (17). 30
    类似技术:
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    FR2605086A1|1988-04-15|Lighting devices with electrochromic screen, in particular for motor vehicles
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    同族专利:
    公开号 | 公开日
    EP2442016A2|2012-04-18|
    EP2442016A3|2012-08-08|
    FR2965889B1|2016-01-08|
    FR3025288B1|2018-08-24|
    FR2965889A1|2012-04-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2605086A1|1986-10-10|1988-04-15|Cibie Projecteurs|Lighting devices with electrochromic screen, in particular for motor vehicles|
    US4872745A|1987-02-18|1989-10-10|Toyoda Gosei Co., Ltd.|Cover for car lamps|
    DE8812322U1|1988-09-29|1988-12-08|Rohrer, Emil, 8901 Koenigsbrunn, De|
    US20020186568A1|2001-05-25|2002-12-12|Iiiume, L.L.C.|Headlight masking method and apparatus|
    DE20316660U1|2003-10-29|2003-12-24|Rank, Franz|Car has components, especially indicator or brake lights or head lamps, with surface layer whose color and optical density can be altered by adjusting electric field on electrochromic layer|
    DE102005058127A1|2005-11-30|2007-06-06|Schefenacker Vision Systems Germany Gmbh|Vehicle lamp e.g. motor vehicle rear lamp, has translucent mediums that are nontransparent in radiating direction of light which is transmitted from illuminants in translucent manner and in opposite direction of light|
    KR20090009465A|2007-07-20|2009-01-23|기아자동차주식회사|Led lamp floodlight quantity control device and the method which uses the variable glass|
    FR2927858A1|2008-02-26|2009-08-28|Peugeot Citroen Automobiles Sa|Illuminating headlight for motor vehicle, has intermittent screen housed in case and interposed in fixed position on path of light beam delivered by optical module for blocking or releasing path when headlight is not in or in service|WO2018091803A1|2016-11-21|2018-05-24|Psa Automoliles Sa|Lighting device comprising a screen with regions having different light transmission coefficients|FR2590965B1|1985-11-29|1989-02-17|Cibie Projecteurs|TWO-LIGHT SIGNAL LIGHT FOR VEHICLE SUCH AS A MOTOR VEHICLE|CN106796006B|2014-07-23|2020-06-12|美泰克太平洋公司|Fog lamp lens and assembly|
    AT516080B1|2014-07-28|2016-04-15|Zizala Lichtsysteme Gmbh|Cover for a lighting device|
    FR3041070A1|2015-09-14|2017-03-17|Peugeot Citroen Automobiles Sa|VEHICLE PROJECTOR|
    CN111237711A|2018-11-29|2020-06-05|深圳市绎立锐光科技开发有限公司|Light source system and lighting device|
    法律状态:
    2015-11-02| PLFP| Fee payment|Year of fee payment: 6 |
    2016-04-29| PLSC| Search report ready|Effective date: 20160429 |
    2016-10-28| PLFP| Fee payment|Year of fee payment: 7 |
    2017-10-31| PLFP| Fee payment|Year of fee payment: 8 |
    2018-10-30| PLFP| Fee payment|Year of fee payment: 9 |
    2019-10-31| PLFP| Fee payment|Year of fee payment: 10 |
    2021-07-09| ST| Notification of lapse|Effective date: 20210605 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1058296A|FR2965889B1|2010-10-12|2010-10-12|LIGHTING AND / OR SIGNALING DEVICE ICE WITH VARIABLE LIGHT TRANSMISSION COEFFICIENT|
    FR1058296|2010-10-12|
    FR1558031A|FR3025288B1|2010-10-12|2015-08-28|LIGHTING AND / OR SIGNALING DEVICE ICE WITH VARIABLE LIGHT TRANSMISSION COEFFICIENT|FR1558031A| FR3025288B1|2010-10-12|2015-08-28|LIGHTING AND / OR SIGNALING DEVICE ICE WITH VARIABLE LIGHT TRANSMISSION COEFFICIENT|
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