FR2813654A1 - PROJECTOR FOR A MOTOR VEHICLE ASSOCIATED WITH PARKING LAMPS - Google Patents

Abstract

Projector comprising a housing (10) housing at least one reflector (14, 18) and at least one light source (16, 20), including a light guide element (30), a light incidence surface through which at the less the light emitted by a light source is coupled. The front end of the light guide in the light exit direction has an exit surface through which the light passes to meet at least one reflector (14, 18). The illumination of the reflector (14) reflects light in the direction of light output. The light exiting from the surface (40) of the light guide element (30) and reflected by the reflector (14) will at least partially fulfill the function of a parking light.

Description

State of the art

  The invention relates to a vehicle headlight comprising

  nant a housing housing at least one reflector with at least one light source associated for a light function and at least one other light source for producing parking lights and whose emitted light at least indirectly meets at least one reflector. Such a projector is known according to document DE 196 52 159 A1. This projector comprises a housing provided with at least

  a reflector with at least one associated light source for

  rer a light function. The projector also has an element

  Light guide ment with a light entry surface (incidence surface) on which the light emitted by at least one other light source arrives for injection. The light guide has a projector front surface facing the light exit direction. The light guide element is such that its light exit surface is traversed along this path by part of the light

  from its envelope surface. The light guide element is

  Thus, in a way, kills an elongated light source emitting light, which serves at least in part to fulfill the function of parking or position lights. The light-emitting surface of

  the light guide element directs the light directly into the

  rection of light output from the projector. The outlet surface of

  the light guide element is relatively small compared to the over-

  projector output side. If light only comes out of the light guide element, only a small area of the projector will be lit. This is why, if necessary, it is difficult to meet the

  conditions regarding the function of a parking light.

Advantages of the invention

  The object of the present invention is to remedy these in-

  suitable for this purpose a headlight of the type defined above

  above, characterized in that at least this other light source is installed separately with respect to at least one reflector, and the light

  emitted by the source is directed at least essentially in the direc-

  opposite to the direction of light output from the projector, to

counter at least one reflector.

  Thanks to the light emitted by at least one other light source, this light reflects at least one reflector from the projector, which creates a large illuminated surface. Due to the light emitted by at least this other light source and reflected by the reflector, we

  can thus fulfill the conditions concerning the function of parking lights

  tioning. According to other advantageous characteristics: - at least one other light source is provided at the front end of the housing turned in the direction of light output from the projector,

  - at least one other light source of at least one optical element

  that is in the form of a reflector and / or a lens which collects the light emitted by at least one other light source and directs it towards at least one reflector, - at least one other light source is protected by at least a

  cover element in the direction of light output of the pro-

ejector,

  - at least one other light source is installed remotely-

  from the front end of the housing facing the exit direction

  of light from the projector, and at the front end of the box

  third, at least one deflection installation is provided which receives light emitted by at least this other light source and directs it towards at least one reflector, - at least one light guide element comprises a light incidence surface by which is injected the light emitted by

  at least one other light source and in the area of an extreme

  front of the housing, directed in the direction of light output from the projector, at least one light-emitting surface is provided

  through which the light passes so as to meet at least one reflective

  tor, - at least one light guide element is produced in the form of a hollow guide with a reflective inner surface,

  - at least one light guide element is made of trans-

  parent and the deployment of light in it is done by re-

  total bending on the elements limiting the light guide, - at least one light guide element comprises at least one prism opposite the light exit orifice, this prism being traversed

  by the light deployed in the total guiding element towards the sur-

  outlet face, - at least one light guide element is installed along the bottom

  of the housing and the light outlet of this light guide member

  the light is turned upwards, - the width of the light guide element leaving its light incidence surface increases towards its exit surface, - part of the light exiting through the exit surface of the element

  light guide meets a glass transparent to the light

  using the light exit orifice of the headlamp to be reflected by it towards at least one reflector, - at least one light guide element comprises at least one other light exit surface towards which the light comes directly in the direction light output from the projector without encountering at least one reflector,

  - in the path of the beam of light penetrating through the sur-

  light entry face in at least one light guide element and / or in the path of the light beam leaving the light guide element through at least one light exit surface there is a color filter, - at least one light guide element is tinted,

  - the housing includes at least two juxtaposed reflectors and the

  light emitted by at least one other light source encountered at

minus two reflectors.

  Drawings The present invention will be described below with the aid of different embodiments shown schematically in the accompanying drawings in which: - Figure 1 is a vertical longitudinal section of a schematic representation of a headlamp corresponding to a first example embodiment of the invention with a first path of the light ray, - Figure 2 is a perspective front view of the projector, - Figure 3 is a vertical longitudinal section of the projector with a second ray path,

  - Figure 4 shows a projector in a vertical longitudinal section

  stalls with a third radius path,

  - Figure 5 is a vertical longitudinal section of a headlight

  corresponding to a second exemplary embodiment,

  - Figure 6 shows the projector in vertical longitudinal section cor-

  corresponding to a third embodiment, - Figure 7 shows the projector in vertical longitudinal section according to a variant with respect to the third embodiment,

  - Figure 8 shows the projector in vertical longitudinal section cor-

  corresponding to a fourth embodiment, - Figure 9 shows the projector in vertical longitudinal section according to a fifth embodiment,

  - Figure 10 shows the projector in a vertical longitudinal section

  wedge corresponding to a sixth embodiment.

  Description of the exemplary embodiments

  Figures 1 to 10 show vehicle headlights

  in particular of a motor vehicle having at least one light function

  neuse. The light function may for example be that of the dipped beam headlights and / or the main beam headlights. The projector includes a housing

  whose light exit orifice is covered by a transparent glass

  rent 12 in glass or plastic. The cover glass can

  be smooth so that the light passes through it without being practically invisible

  fluencée. Alternatively, the cover glass 12 may have at least places optical profiles for deflecting and / or dispersing the light passing through them. The housing 10 comprises at least one reflector 14, with which is associated a light source 16 placed in an opening of the

  top of the reflector. The reflector 14 with its light source 16 as-

  on the dipped beam or dipped beam function

  ment and high beam. In the embodiment shown in Figure 2, we have juxtaposed two reflectors; the light source 16 is associated with the first reflector; a second light source 20 is

  associated with the second reflector 18; this source is placed in an or-

  vertex at the top of the reflector 18. The first reflector 14 with the light source 16 can perform the function of low beam and the second reflector 18 with its light source 20, the function of high beam or vice versa. As a variant, the first reflector 14 and its light source 16 perform the function of low beam and high beam and the second reflector 18 with its light source 20 performs the function of fog lights or vice versa. The light sources 16, 20 can be incandescent lamps or gas discharge lamps. The reflectors 14, 16 reflect in the exit direction 13, the light emitted by each light source

  16, 20 so that this light passes through the cover glass 12.

  The projector further includes a light guide element.

  Mière 30 passing for example inside or outside the housing 10

  along the bottom 11 of the housing 10. The light element 30 can also

  ment follow a side wall or the upper wall of the housing 10. At its rear side of the housing 10 the light guide element 30 has a light entry surface 32. The light entry surface 32 is located in look of at least one other light source 34 whose emitted light is coupled at least in part through the light entry surface 32 in the light guide element 30. So that as large a part as possible of the light emitted by the light source 34 is directed towards the light entry surface 32 of the light guide element 30, a lens 36 can be provided between the light source 34 and the light entry surface 32. As a variant

  or in addition to the lens 36, on the side of the light source 34 oppo-

  on the light entry surface 32 a reflector 38 which surrounds it,

  bends the light from the light source 34 and directs it towards the light entry surface 32. As the light source 34, it is possible to use

  for example an incandescent lamp, a light emitting diode-

  cente, a luminescent tube, a neon tube or an electrolumi-

  nescente. The light source 34 can be point or correspond

  to the section of the light guide element 30, that is to say to be elongated.

  The light guide element 30 has at least one light exit surface 40 at the front edge of the housing 10 in the light exit direction 13, under the reflectors 14, 18. The light exit surface 40 is turned upwards so that the light exits therefrom so as to meet at least one of the reflectors 14, 18 so as to be reflected by it in the direction of light exit 13 and thus pass through the cover glass 12. The light exiting the light-emitting surface 40 of the light guide element 30 arrives

  diagonally forward, mainly in the opposite direction to the di-

  rection of light output 13 from the projector on at least one of the

  reflectors 14, 18. This ensures indirect lighting of at least one of the reflectors 14, 18. The light-emitting surface 40 of the guide element

  light 30 can also be found laterally next to the reflectors

  ters 14, 18 or above them.

  The light guide member 30 may be a hollow guide with reflective interior walls; the light injected into this guide is transmitted by reflection. The light guide member 30 is preferably a light-transparent material, plastic or glass. The path of the light in the light guide element 30 takes place by total reflection on the marginal surface of the light guide element 30. In the embodiments presented, there is only one light guide element 30 consisting of a flat body and section

  substantially rectangular. The light guide element 30 can also

  It must be made up of a large number of different optical fibers. The width of the light guide element 30 increases from the light entry surface 32 to its exit surface 40. The height

  of the light guide element 30 is substantially constant over its length

  LATIONS. Figure 1 shows the projector with the light guide element 30 according to a first embodiment; there is shown by way of example the path of a ray of light injected into the light guide element 30 and deploying therein. The light guide element 30 comprises, near its front end, at the level of the light exit surface 40, a prism 42 for example provided with a mirror surface, which directs the light deployed in the light guide element. light 30 on the light-emitting surface 40. The prism 42 is formed by an oblique surface 44 on the lower side of the light guide element 30 at its front end; this surface in

  bias 44 is provided with a reflective layer 46. The prism 42 reflects

  chit the light deployed in the light guide element 30, in an upwardly inclined direction on the light exit surface 40. The deflection of light on the light exit surface 40 of

  the light guide element 30 can be made through the same prism

  by total reflection. At the exit from the surface 40, the light is reflected

  fractured in the direction opposite to the light exit direction 13 to reach at least one of the reflectors 14, 18. The light exit surface 40 of the light guide element 30 may have at least places optical profiles through which light

  emitted is deflected and / or diffracted.

  FIG. 3 shows a first exemplary embodiment of the projector with another path of the ray of light developed in the light guide element 30. Part of the light reflected through the prism 42 and the light-emitting surface 40, coming out of

  the light guide element 30 arrives directly on the cover glass

  ture 12 and is reflected against its inner face and / or its outer face so that this light meets at least one of the reflectors 14, 18. The light which passes through the exit surface 40 of the light guide element 30 and arrives directly on at least one of the reflectors 14, 18 or is reflected by the cover glass 12 towards at least one

  reflectors 14, 18 will be reflected by at least one of these reflectors

  teurs 14, 18 so as to meet at least in part, the conditions relating to the parking light function as to the intensity

  lighting and visibility in different directions.

  In an alternative embodiment of the light guide element 30, as shown in FIG. 4, this comprises, in addition to the light exit surface 40, another light exit surface 48. This other exit surface 48 of the light guide element 30 is directed in the direction of light exit 13 from the projector; part of the light deployed in the light guide 30 exits through this

  exit; this light does not arrive on the prism 42 which is below

  under the other light exit surface 48. By this other light exit surface 48 of the light guide element 30, the light deploys directly in the exit direction 13 without meeting one of the reflectors 14, 18. This other light-emitting surface 48 of the light guide element 30 may be perpendicular to the direction

  longitudinal of the light guide element 30 so that this

  mine will come out practically without being deflected. This other exit surface

  light tie 48 can also be tilted to form a prism and refract the light emitted. The light exiting from this other light exit orifice 48 of the light guide element 30 can, to fulfill the conditions relating to the function of parking lights, such

  that the intensity of illumination and visibility, participate in addition to the

  light exiting through the light exit orifice 40 and reflected by at least one of the reflectors 14, 18. The other light exit surface 48 of the light guide element 30 may include optical profiles

  to deflect and / or diffract the light emitted.

  Figure 5 shows the projector with a light guide element 130 corresponding to a second embodiment; the construction is essentially identical to that of the first example of embodiment. The light guide element 130 has at its front end a prism 42 through which the light which deploys in the light guide element 130 is directed towards the light exit surface 40. The light guide element 130 comprises further at its front end, another prism 150 placed above the prism 42 and which is provided with a mirror surface. Part of the light reflected by the prism 42 leaves the light guide element 130 through the light-emitting surface 40. Another part of the light reflected by the prism 42 arrives on the other prism 150 which directs it towards the light exit surface 152 of the light guide member 130 through which the member exits in the light exit direction 13. Due to this

  another prism 150, in a projector according to the second example of realization

  No light from the light guide element 30 arrives on the cover glass 12 without having been previously reflected by at least one of the reflectors 14, 18. The light guide element 130 can also have another surface. light output 48 turned in the

  direction of light exit 13, and through which light also exits

  is lying. FIG. 6 shows a third exemplary embodiment of a projector with a light guide element 30. In this example, the construction corresponds practically to that of the first and second example. In the path of the beam, the light entering through the incidence surface 32 of the light guide element 30 is provided with a color filter 60. This filter colors the color arriving in the light guide element 30 so that at at least one of the reflectors 14, 18 is illuminated with tinted light. The color filter 60 can be a sheet which covers the light incidence surface 32 of the light guide element 30. The light which leaves the other light output surface 48 and / or the output surface light 152 of the light guide member 30 or 130 is tinted correspondingly. If the color filter 60 is orange, for sufficient lighting intensity, the light-emitting surface 48 and / or the surface

  light output 152 will serve as indicators. As an alternative to the

  tage of a color filter 60, it is also possible to provide tinting

  the light guide element 30, 130.

  FIG. 7 shows an alternative embodiment of the projection

  tor of FIG. 6. In this variant, instead of placing a color filter on the incidence surface 32, a color filter 62 is placed in the path of the beam of light leaving the exit surface and / or of the light exit surface 48 and / or the light exit surface 152 of the light guide member 30, 130. The color filter 62 can then be installed only in the path of the beam of light exiting the light exit 40, 48, 152 of the light guide member 30, 130 or of all light exit surfaces. It is also possible to provide a respective filter with different colors for the different light output surfaces 40, 48, 152. This allows the lighting of at least one of the reflectors 14, 18 with a color other than that of the light exiting from the light exit surfaces 48, 152. For example, the light exit surface 48 and / or the light exit surface 152 can be assigned a filter 62 of orange color which corresponds to the signal color required for the flashing function. The color filter 62 can be a

  colored sheet applied to the light-emitting surface respectively

tive 40, 48, 152.

  Figure 8 shows a fourth embodiment of the projector which does not include a light guide element. At least this other light source 34 as in the examples of

  previous realization, is installed near the rear side of the box

  tier 10 of the projector. At least this light source 34 cooperates with a reflector 38 and / or a lens 36 which strongly focuses the light emitted by the light source 34. At the front end of the

  housing 10 turned in the direction of light exit 13 from the projection

  tor, at least one deflection device 70 receives the light emitted by at least one light source 34 and directs the incidence light, inclined towards the front, at least essentially in the direction opposite to the

  light exit direction 13 from the headlamp, on at least one reflective

  tor 14. The deflection installation 70 may be a reflector or a prism or a mirror prism. The light directed onto the reflector 14 can be tinted using the means described above. Like at least one light source 34, the deflection installation 70 can also be provided below, above or next to the reflectors

14, 18.

  Figure 9 shows a fifth embodiment

  of the projector. As a variant of the exemplary embodiments described below

  above, it comprises at least one other light source 34 at the front end of the housing 10 facing the light output direction 13 of the projector. The light source 34 can be provided in

  below, above or next to the reflectors 14, 18. This light source

  neuse 14 includes at least one optical element in the form of a reflector 72 and / or a lens 74 or also in the form of a prism which collects the light emitted by the light source 34 and directs it at an angle towards the forward, essentially in the opposite direction to

  the light output direction 13 of the projector, on at least one

  flector 14. The reflector 72 forms a covering element which protects

  at least one light source 34 so that it is not visible

  visible from the outside when looking into the projector and provides only indirect lighting by the light directed towards the reflector 14 to be reflected by the latter. As a variant, part of the light emitted by at least one light source 34 can arrive directly on the projector. Figure 10 shows a sixth embodiment of the

  headlamp comprising at least one other light source 34 installed

  lée also at the front end of the housing 10; as a variant of the fifth embodiment described above, the light is emitted by at least one other light source 34 so that it is grouped on at least one reflector 14 and illuminates it. Source

  light 34 has no optical element.

Claims (14)

  1) Vehicle headlamp comprising a housing (10) housing at least   a reflector (14, 18) with at least one light source (16, 20) as-   associated for a light function and at least one other light source   neuse (34) for producing parking lights and the light emitted of which at least indirectly meets at least one reflector (14, 18), characterized in that at least this other light source (34) is installed separately from the at least one reflector (14, 18), and the light emitted by the source is directed at least essentially in the direction opposite to the direction of light exit (13) of the   projector, to meet at least one reflector (14, 18).   2) Projector according to claim 1, characterized in that at least one other light source (34) is provided at the front end of the housing (10) facing in the direction of exit from light (13) of the projector.   3) Projector according to claim 2, characterized in that   at least one other optical element is associated in the form of a   reflector and / or a lens to this other light source (34) and the light emitted by this source (34) is collected and directed towards at least a reflector (14, 18).   4) Projector according to any one of claims 2 or 3,   characterized in that at least one other light source (34) is protected by at least one covering element (72) in the direction of light output (13) of the projector.    ) Projector according to claim 1, characterized in that   at least one other light source (34) is installed remotely   from the front end of the housing (10) pointing in the direction of exit   tie light (13) of the projector, and at the front end of the housing (10), there is provided at least one return installation (70) which receives light emitted by at least   this other light source (34) and directs it towards at least one reflective (14, 18).   6) Projector according to claim 1, characterized by   at least one light guide element (30, 130) having an overlay   light incidence face (32) through which is injected the light emitted by at least one other light source (34) and in the region of a front end of the housing (10), directed in the direction of exit   light (13) from the projector, at least one exit surface is provided.   tie of light (40) through which the light passes so as to meet at least one reflector (14, 18).   7) Projector according to claim 6, characterized in that at least one light guide element (30, 130) is produced under the   shaped like a hollow guide with a reflective interior surface.   8) Projector according to claim 6, characterized in that at least one light guide element (30, 130) is made of transparent material and the deployment of light therein is by   total reflection on the elements limiting the light guide (30, 130).   9) Projector according to claim 6, characterized in that at least one light guide element (30, 130) comprises at least one prism (43) facing the light exit orifice (40), this prism being traversed by the light deployed in the total guide element   (30, 130) to the outlet surface (40).    ) Projector according to claim 6, characterized in that at least one light guide element (30, 130) is installed along the   bottom (11) of the housing (10) and the light exit orifice (40) of this element   The light guide (30, 130) is turned upwards.   11) Projector according to any one of claims 6 to 10,   characterized in that the width of the light guide element (30, 130) extending from its surface   of incidence of light (32) increases towards its exit surface tie (40).   12) Projector according to claim 6, characterized in that part of the light exiting through the exit surface (40) of the element   light guide (30) meets a window transparent to the light   the light output port of the projector to be reflected by   this towards at least one reflector (14, 18).   13) Projector according to claim 6, characterized in that   at least one light guide element (30) has at least one   the light-emitting surface (48) through which the light comes out   in the direction of light exit (13) from the projector without   meet at least one reflector (14, 18).   14) Projector according to claim 6, characterized in that in the path of the light beam penetrating through the light entry surface (32) in at least one light guide element (30, 130) and / or in the path of the light beam exiting the light guide element (30, 130) through at least one exit surface   of light (40, 48, 152) we have a color filter (60, 62).   15) Projector according to claim 6, characterized in that   at least one light guide element (30, 130) is tinted.   16) Projector according to claim 1, characterized in that the housing (10) comprises at least two reflectors (14, 18) juxtaposed and   the light emitted by at least one other light source (34) reflects   against at least two reflectors (14, 18).