EP0828112A1 - Signal light producing the required color light by additive synthesis - Google Patents

Abstract

The warning lights use a parabolic segmented mirror to produce bands of light (21,23) which then enter a dividing element (12). The dividing element (12) consists of alternate segments (18,20) each having a curved forward face to cause convergence to focal points (F) in a plane (P). A colouring element (22) is situated in the plane (P) and consists of alternate colour filters (28,30) which are respectively narrow and wide and coloured green and red. After passing through the filters the light is divergent and recombines to form white light as required by regulation.

Description

The invention relates to signaling lights, especially for a motor vehicle.

We know from document EP-0 211 742, in the embodiment shown in Figure 5 of this document, a motor vehicle light comprising a light source and a blade extending in the path of the light beam. The blade has an upstream face with profiled facets of curved section parallel to each other. These facets are adapted to split the beam into a first set of beams elementary and a second set of beams elementary, each elementary bundle being converge. The upstream side of the blade carries filters coloring, for example of green color, extending in the path of the elementary beams of the first set. The downstream side of the blade carries other filters of coloring, for example red, extending especially in the path of the elementary beams of the second set, except on parallel lines corresponding to the path of the elementary green beams of the first set. Downstream of the blade, the two green and red elementary beam sets add together according to a synthesis process additive to constitute a unique color beam white. When the light is not in use, the face downstream of the blade, mostly red, gives the fire a general appearance of red color while the fire in service produces a white beam. The blade has a complex and precise structure including diopters and colored filters to achieve both convergence of each of the elementary beams and their coloring according to the respective colors. The making this blade is relatively difficult and expensive. In addition, this blade structure limits the possibilities of arrangement of filters and dioptres.

Document DE-42 28 928 presents a traffic light signage including a first colored blade in ground and bearing dioptres alternated with slits crossing the thickness of the blade. The fire includes a second blade colored in the mass in another color and wearing dioptres alternated with bands leaving unchanged the orientation of the beam. The beams crossing the diopters of the first blade are colored and made convergent, and then cross the bands of the second blade. The beams crossing the slots of the first blade then cross the diopters of the second blade to be colored and rendered in turn converging.

However, in this document, fire requires large colored filters. Since then, the amount of material required in both colors precise is itself important. In addition, the blade further back is thus made easily visible from outside the fire, which can lead to poor aesthetics for fire in the extinguished state. In particular, the monochrome aspect in the off state is not very satisfactory. In addition, the important differences thick on the downstream blade make it difficult to to manufacture.

An object of the invention is to reduce the amount colored material required for the filters, and improve the aesthetics of the extinguished fire. Another purpose of the invention is to provide new possibilities for arrange filters and dioptres.

In order to achieve this goal, provision is made according to the invention a signaling light in particular for motor vehicle, comprising a light source adapted to emit a light beam, an organ splitter suitable for dividing the beam into a first set of elementary beams and a second set of elementary beams configured so that the first and second bundle sets elementals add up to each other, and an organ of distinct coloring of the dividing organ and bearing a first set of coloring filters arranged in the path of the elementary beams of the first set, fire comprising a second set of filters coloring arranged in the path of the beams elementaries of the second set, in which the organ the second set of filters coloring.

So at least some of the filters can have very small dimensions. The quantity of colored material required in the color exactly required is therefore moderate. In addition, the aesthetics of fire extinguished, in particular if necessary its monochrome aspect, is improved. In addition, this fire offers many and new possibilities to arrange filters and dioptres. In addition, the coloring member does not have significant differences in thickness on its wall, this which was the case in document DE-42 28 928 and led to manufacturing difficulties.

Preferably, the coloring member extends to distance from the dividing organ.

In the fire according to the aforementioned document EP-0 211 742, the facets achieving the convergence of elementary beams have a focal length important so that the focal plane of the facets found downstream of the downstream face of the single blade. he it follows that the lines left colorless on the face downstream, between the red filters for the route of elementary green beams of the first set, have a large width. These colorless lines are therefore easily visible between the red filters when the fire is not in service. Therefore, the red filters and colorless lines give the fire a imperfect red monochrome appearance.

According to a preferred embodiment of the invention, the dividing member comprises a first set of elements adapted to make each converge elementary bundle of the first set and having foci arranged along a focal surface generally perpendicular to an axis of fire, the coloring organ having a blade generally extending perpendicular to the axis and in the vicinity of the surface focal.

So the elementary beams of the first together each have a reduced width at the level of the coloring organ. Therefore, the parts of the coloring member located in the path of these beams can occupy a very small area. This organ therefore produces an improved monochrome appearance when the fire is not in service.

Advantageously, the coloring member is located on the focal surface.

So we can minimize the dimension of parts of the coloring member located in the path bundles from the first set.

Advantageously, the set of filters coloring includes portions colored in the mass.

Advantageously, the portions colored in the mass have an upstream facet and a downstream facet, the upstream facet having an area greater than the area of the downstream facet.

Thus, we reduce the part of the colored portions visible from outside the fire, and it is further improved the monochrome aspect of fire.

Advantageously, the fire includes a base, the coloring member being fixed to one end of the base and closing the interior of the fire.

Thus, the coloring member acts as ice.

In the aforementioned document EP-0 211 742, in the embodiment of Figure 8, the body of coloring includes first coloring filters made of a first material having a first color, for example red. These filters are conformed to straight bands parallel to each other, occupying all the thickness of the organ. The coloring member comprises also second coloring filters constituted in a second material having a second color, by green example, also in the form of bands. The first and second bands are alternated between them. The upstream face of the organ oriented towards the source is formed by convex cylindrical facets profiles, respectively associated with filters for divide the incident beam emitted by the source into different elementary beams each passing through a coloring filter. Downstream of the screen, the summary additive colored elementary beams respectively in red and in green produces a beam White. However, green filters have a downstream side narrow compared to the wide downstream face of red filters, so the extinguished fire looks overall red monochrome. We equip the organ with coloring of a peripheral frame formed in the red material and extending in continuity of material with the red filters. So to make such a organ by means of two colored plastics in red and green respectively, the red part of the organ, red filters and frame, at by means of a single injection by a single nozzle injection opening into the mold cavity and associated with this material. However, to achieve the green filters, it is then necessary to inject individually each of the green bands between the red stripes. Generally, we therefore have in the mold as many injection nozzles associated with the green matter that there are green filters to form. he it follows that the structure of the mold is relatively complex and expensive.

In order to overcome these drawbacks, provision is made also, according to the present invention, a fire in which the coloring member has a generally planar shape, the filters of the first set being made up of a first material having a first color, and the filters of the second set being made up of a second material having a second different color of the first color, the filters of the first set being alternated with the filters of the second set in a direction generally parallel to a plane of the coloring member, the coloring member comprising a first junction part in continuity of material with the filters of the first set and common to them, the coloring member comprising a second part of junction in continuity of material with the filters of the second set and common to these.

Thus, the second junction part ensures a continuity of material of the filters of the second set between them. Therefore, the filters of the second set can be made with a single injection per a common single injection nozzle for all of these filters. So we simplify the mold structure for manufacturing the coloring member.

Advantageously, the second junction part includes a layer extending parallel to the member staining in excess of the filters of the first set.

So the presence of the second part of joining does not involve truncating the first part of junction, for example if the latter has the form of a frame as above. In addition, this layer provides a mechanical reinforcement of the coloring organ, which increases its solidity.

Advantageously, the layer defines a face free from the coloring organ.

Thus, the manufacture of the coloring member with the layer is particularly simple. Moreover, when the organ is part of a traffic light, the organ can be arranged with the layer on the face upstream of the organ, so that it is barely visible from the outside and does not alter the appearance of the fire when it is off.

Advantageously, the layer has a thickness significantly less than one dimension of filters of the first set following a direction generally perpendicular to the plane of the organ of coloring.

So the colored layer changes very moderately the transmission coefficient of the filters of the first together. In addition, the color dot resulting from the successive crossing of the colored layer and filters of the first set by the associated light rays is very close to the color point associated with only filters of the first set. Additive synthesis for production of the regulatory beam of fire is therefore practically unchanged.

• l'épaisseur de la couche est inférieure ou égale à environ 0,5 fois ladite dimension des filtres du premier ensemble ;
• les filtres du premier ensemble sont colorés en une couleur ayant pour coordonnées trichromatiques x = 0,666 et y = 0,330, et la couche est colorée en une couleur ayant pour coordonnées trichromatiques x = 0,435 et y = 0,413 ;
• les filtres du deuxième ensemble sont constitués par des bandes rectilignes ayant chacune une longueur supérieure à 0,5 fois une dimension de l'organe de coloration parallèlement à ces bandes ;
• les filtres du deuxième ensemble sont distants les uns des autres et disposés suivant une matrice comprenant plusieurs lignes et plusieurs colonnes ; et
• les premier et deuxième matériaux sont des matières plastiques.

The fire according to the invention may also have one or more of the following characteristics:

• the thickness of the layer is less than or equal to approximately 0.5 times said dimension of the filters of the first set;
• the filters of the first set are colored in a color having the trichromatic coordinates x = 0.666 and y = 0.330, and the layer is colored in a color having the trichromatic coordinates x = 0.435 and y = 0.413;
• the filters of the second set consist of rectilinear bands each having a length greater than 0.5 times a dimension of the coloring member parallel to these bands;
• the filters of the second set are distant from each other and arranged in a matrix comprising several rows and several columns; and
• the first and second materials are plastics.

According to the invention, a mold is also provided. injection for the manufacture of a coloring member optics according to the invention, comprising a cavity injection into which only two nozzles open injection, these nozzles being adapted to allow injection into the cavity of two respective materials having different colors.

• la figure 1 est une vue en coupe axiale suivant un plan horizontal d'un feu selon l'invention;
• la figure 2 est une vue en coupe axiale du même feu suivant le plan axial vertical II-II de la figure 1;
• la figure 3 est une vue partielle en coupe à plus grande échelle de l'organe diviseur et de l'organe de coloration de la figure 2;
• la figure 4 est une vue partielle en coupe à plus grande échelle de l'organe de coloration;
• la figure 5 est une vue analogue à la figure 3 montrant une première variante de réalisation du feu;
• la figure 6 est une vue analogue à la figure 3 montrant une deuxième variante de réalisation du feu;
• la figure 7 est une vue en coupe axiale analogue à la figure 1 montrant une troisième variante de réalisation du feu;
• la figure 8 est une vue en coupe axiale du même feu suivant le plan vertical VIII-VIII de la figure 7;
• la figure 9 est une vue en coupe axiale analogue à la figure 2 montrant une quatrième variante de réalisation du feu;
• la figure 10 est une vue partielle de la face amont de l'organe diviseur montrant une cinquième variante de réalisation du feu;
• la figure 11 est une vue partielle de la face amont de l'organe de coloration de la cinquième variante de réalisation ;
• la figure 12 est une vue analogue à la figure 3 montrant une sixième variante de réalisation ;
• la figure 13 est une vue partielle en coupe à plus grande échelle de l'organe de coloration de la figure 12;
• la figure 14 est une vue en perspective de l'organe de coloration représenté aux figures 12 et 13 ;
• la figure 15 est une vue en perspective et en coupe à plus grande échelle de l'organe de coloration de la figure 14 ;
• la figure 16 est un diagramme de représentation de couleurs en coordonnées trichromatiques, pour l'organe des figures 14 et 15 ;
• la figure 17 est une vue schématique en coupe d'un moule pour la fabrication de l'organe des figures 14 et 15;
• la figure 18 est une vue analogue à la figure 5 montrant une septième variante de réalisation du feu ; et
• la figure 19 est une vue analogue à la figure 6 montrant une huitième variante de réalisation du feu.

Other characteristics and advantages of the invention will become apparent on reading the following description of a preferred embodiment and variants, given by way of nonlimiting examples. In the accompanying drawings:

• Figure 1 is an axial sectional view along a horizontal plane of a light according to the invention;
• Figure 2 is an axial sectional view of the same light along the vertical axial plane II-II of Figure 1;
• Figure 3 is a partial sectional view on a larger scale of the dividing member and the coloring member of Figure 2;
• Figure 4 is a partial sectional view on a larger scale of the coloring member;
• Figure 5 is a view similar to Figure 3 showing a first alternative embodiment of the light;
• Figure 6 is a view similar to Figure 3 showing a second alternative embodiment of the light;
• Figure 7 is an axial sectional view similar to Figure 1 showing a third embodiment of the light;
• Figure 8 is an axial sectional view of the same light along the vertical plane VIII-VIII of Figure 7;
• Figure 9 is an axial sectional view similar to Figure 2 showing a fourth embodiment of the light;
• Figure 10 is a partial view of the upstream face of the dividing member showing a fifth embodiment of the light;
• Figure 11 is a partial view of the upstream face of the coloring member of the fifth embodiment;
• Figure 12 is a view similar to Figure 3 showing a sixth alternative embodiment;
• Figure 13 is a partial sectional view on a larger scale of the coloring member of Figure 12;
• Figure 14 is a perspective view of the coloring member shown in Figures 12 and 13;
• Figure 15 is a perspective view in section on a larger scale of the coloring member of Figure 14;
• FIG. 16 is a diagram of representation of colors in trichromatic coordinates, for the member of FIGS. 14 and 15;
• Figure 17 is a schematic sectional view of a mold for the manufacture of the member of Figures 14 and 15;
• Figure 18 is a view similar to Figure 5 showing a seventh alternative embodiment of the light; and
• Figure 19 is a view similar to Figure 6 showing an eighth alternative embodiment of the light.

Referring to Figures 1 to 4, we will describe a signaling light which is a reversing light intended for a motor vehicle. It could alternatively be a brake indicator light, a brake indicator light change of direction, or rear light of fog.

The light comprises a base 2 having a rear portion in general paraboloid shape, the front internal 4 of this portion being reflective so that it constitutes a mirror. This portion defines an axis 5 of the base and the fire. The base has a front portion tubular 6. The fire has a light source 8 constituted by a bulb adapted to emit a beam luminous, extending opposite the mirror 4 and located at a mirror focus. Figure 1 is a sectional view of the fire horizontal while Figure 2 is a sectional view vertical. In a manner known per se, the mirror 4 has ridges 10 with convex curved cross section, inscribed in vertical planes parallel to each other. The paraboloid shape of the mirror 4 reflects the component vertical of each light ray emitted by the source 8 in a direction parallel to axis 5. The streaks 10 of the mirror 4 scatter in the horizontal direction the horizontal components of the rays emitted by the source 8. Consequently, the reflected light rays by the mirror 4 are inscribed in plans essentially horizontal parallel to axis 5. In the following the presentation, the propagation of the reflected beam towards the front of the light will define the downstream directions and upstream.

The fire has a first flat blade transparent colorless 12, glass or other material plastic, extending downstream of the mirror 4 and the source 8 perpendicular to the axis 5. This blade 12 has a flat downstream face 16 and an upstream face 14. This face upstream has profiled facets 18, 20 with cross-section convex arcuate arc, or gadroons, extending in relief of the upstream face. These profiled facets are all identical, mutually parallel and adjacent to each other. Profiled facets extend in the horizontal direction. Profiled facets are referenced alternately 18, 20, the facets profiles 18 constituting a first set and the profiled facets 20 constituting a second set. Each profiled facet 18, 20 constitutes for the vertical components of the light rays which strike a converging lens having a focal point F located downstream of the downstream face 16 of the blade 12. The foci F are therefore in this case arranged in a focal plane P perpendicular to axis 5, located downstream of the downstream face 16 of the blade.

The incident beam striking the upstream face 14 of the blade includes the light rays coming from the mirror 4. We will denote by "elementary beam" 21, 23 all of the light rays of this beam coming from the mirror 4 which strike the same facet profile 18, 20. The incident beam therefore comprises a first set of elementary beams 21 striking the profiled facets 18 of the first set, and a second set of elementary beams 23 striking the profiled facets 20 of the second set. As the shows figure 3, in the elementary bundle 21, 23 received by each profiled facet, the vertical component is parallel to axis 5. The profiled facet 18, 20 transforms this elementary beam 21, 23 with components vertical parallel to each other in a beam elementary in which the vertical components of rays converge at focus F. Downstream of each focus F, the elementary beam 21, 23 becomes divergent, then even further downstream and not shown on the Figure 3, the elementary beams 21, 23 of the two sets are added together according to a process of additive synthesis to constitute a homogeneous beam unique.

Thus, the blade 12 constitutes a dividing member suitable for dividing the beam reflected by the mirror 4 into a first set of elementary beams 21 and a second set of elementary beams 23 configured so the first and second sets of elementary beams add up to each other. The profiled facets 18 constitute a first set elements adapted to make each beam converge elementary 21 of the first set, and the facets profiles 20 constitute a second set of elements adapted to make each elementary beam converge 23 of the second set.

The light also has a second flat blade transparent 22 or coloring screen, glass or plastic, extending perpendicular to the axis 5 of the beam, parallel to the first blade 12, in downstream and away from the first blade, and having upstream 24 and downstream 26 flat faces. This second blade 22 extends in the focal plane P of the first plate 12, the focal plane P being located midway between the upstream faces 24 and downstream 26 of the second blade.

The second blade 22 includes portions colored in the mass which constitute wide bands 28 and narrow bands 30 parallel to each other, alternating along the plane of the blade and contiguous. The bands 28, 30 extend horizontally and parallel to the profiled facets 18, 20 of the first blade 12, in look at these. The bands 28, 30 are colored from the upstream face 24 of the blade to its downstream face 26. Thus, the colored bands 28, 30 have a upstream facet external to the blade and a downstream facet external to the blade. The junction between the strips adjacent is formed by side interfaces internal horizontal planes, perpendicular to upstream and downstream facets, and parallel to axis 5.

The narrow bands 28 are colored green and the wide bands 30 in red as shown in Figure 4 on which the colors according to the conventional representation recommended by the Office of United States Patents. The second blade 22 is arranged so that the focal points F are in the center green and red bands. The narrow green stripes 28 are arranged opposite the profiled facets 18 of the first set. The narrow green bands 28 are therefore crossed by the elementary beams 21 of the first together they color green. Wide bands reds 30 are arranged opposite the profiled facets 20 of the second set, and are crossed by the elementary bundles 23 of the second set they color red. Due to the convergence of elementary beams 21, 23, only a central region wide red bands 30 is crossed by elementary bundles 23 of the second set.

The narrow bands green 28 and wide red 30 thus constitute coloring filters. The narrow green bands 28 define a first set of filters associated with the first set of beams elementary 21, and wide red bands 30 define a second set of filters associated with the second set of elementary beams 23. The second blade 22 constitutes a coloring member comprising a first set of coloring filters 28 arranged in the path of the elementary beams 21 of the first set, and a second set of filters coloring 30 arranged in the path of the beams elementary 23 of the second set. The organ of coloring 22 is distinct from the dividing member 20 and extends away from it.

The addition of the elementary green beams 21 and red 23 by additive synthesis downstream of the second blade 22 provides a white beam. The elementary beams 21 of the first set converge in the vicinity of the corresponding foci, the source 8 is not strictly punctual. The location of foci F in the center of the narrow bands green 28 allows these bands to be given a width, know a dimension along the plane of the blade and perpendicular to axis 5, very narrow. It follows that the narrow green bands 28 are barely visible for an outside observer when the fire is not in service. The red monochrome appearance imparted to the fire by wide red bands 30 is therefore of good quality.

• pour le rouge, x = 0,666, y = 0,330; et
• pour le vert , x = 0,366, y = 0,449.

The colors used can be, for example, those corresponding to the following trichromatic coordinates:

• for red, x = 0.666, y = 0.330; and
• for green, x = 0.366, y = 0.449.

In this case, the profiled facets 18, 20 are identical, in particular of the same dimensions, so that the amount of light passing through the profiled facets 18 is the same as the amount of light passing through profiled facets 20. Other examples of color combinations in document EP-0 211 742.

The second blade 22 is fixed to the end of the front portion 6 of the base 4 with the interposition of a seal not shown. This blade closes thus the interior of the fire. It therefore acts as fire exit glass.

Figure 5 shows a first variant of realization of the fire. Elements that differ from what just described carry references increased by hundred. This variant differs from the above only by the shape of the narrow green bands 128 and large red 130. This time, the junction between the adjacent strips 128, 130 is formed by flat internal side interfaces inclined by relative to the upstream and downstream faces 24, 26, and relative to axis 5. Thus, the narrow green bands 128 have in cross section a tapering conical shape towards the downstream face 24. The upstream facet of these strips has an area larger than the area of their downstream facet. In addition, the second blade 22 is located still at the focal plane P of the first blade 12, but this plane P passes through the downstream face 26 of the second blade 22 and therefore by the downstream facets of the bands 128, 130. By therefore, the downstream facet of each narrow green band 128 corresponds to the beam path location elementary 21 where this beam is the narrowest. We can so give this downstream facet a width particularly reduced, in order to further improve the red monochrome aspect of the fire. If necessary, it is not harmful that this variant leads to back to give a relatively large width to the upstream facet of the narrow green bands 128 since these upstream facets are hardly visible from the outside fire.

Figure 6 shows a second variant of realization of the fire of figures 1 and 2. The elements different bear references increased by two cents. This variant is distinguished only by the forms profiled facets or gadroons. On the face upstream 14 of the first blade 12, the elements 218 of the first set associated with the first set of elementary beams 221 are still formed by contoured convex facets in relief. But this time, elements 220 of the second set associated with second set of elementary beams 223 are formed by profiled facets with curved section in circular arc, hollow concaves, of the same curvature and same width as the facets 218 profiled in relief. These hollow profiled facets 220 constitute in the vertical planes of diverging lenses. The same amount of light passes through the facets 218 and facets 220.

Thus, each contoured facet in relief 218 transforms the associated elementary beam 221 into a elementary beam in which the components vertical rays converge at focal point F. And each facet 220 hollow profile transforms the beam elementary 223 associated in an elementary bundle in which the vertical components of the rays diverge.

As before, the narrow green bands 28 and large reds 30 color the beams elementaries 221, 223 of the first and second sets of beams. Downstream of each focal point F, the beams elementary 221 of the first set become divergent and then further downstream the beams elementaries 221, 223 of the two sets add up between them to form a single homogeneous beam White. Due to the divergence of the beams elementary 223 of the second set, the largest part of each wide red strip 30 is crossed by the associated beam 223. Hollow facets 220 can be configured to optimize the area of wide red bands 30 crossed by the beams 223.

In Figure 6, the upstream face 14 of the blade 12 may have slope breaks at the junction between profiled facets 218 and 220 depending on their radii of curvature and their dimensions.

Figures 7 and 8 show a third alternative embodiment of the light of Figures 1 and 2. The different elements carry references increased by three hundred. This time, the mirror 304 is smooth and devoid of streaks. This mirror reflects the beam divergent emitted by source 8 into a ray beam parallel to the axis 5. The first blade 12 is identical to that of FIG. 1. The upstream face 24 of the second blade 22 has profiled facets in relief or gadroons 330, similar to those of the first blade. These facets 330 are parallel to each other and oriented in a common vertical direction perpendicular to the horizontal common direction of the profiled facets 18, 20 of the first blade 12. The process of dividing the beam, coloring of the elementary beams and additive synthesis takes place in an identical way to what precedes. The profiled facets 330 of the second blade 22 ensure dispersion in the direction horizontal of the beam transmitted by the first plate 12. Thus, the coloring member 22 includes means for scattering of light rays transmitted by the organ divider 12.

Figure 9 shows a fourth variant of realization of the fire of figures 1 and 2. The elements different bear references increased by four cents. In this variant, the base 2 is devoid of mirror, its rear portion 404 being non-reflective. The second blade 22 is identical to that of FIG. 1. The profiled facets in relief 418, 420 of the first blade 12 are this time arranged on the downstream face 16 of this blade. The upstream face 14 of the first blade 12 presents Fresnel 433 patterns, known in themselves, so that this upstream face transforms the beam divergent emitted by source 8 into a ray beam parallel to axis 5. The downstream face 16 of the first blade 12 divides the beam into two sets of elementary converging beams. The coloring of elementary bundles and their addition takes place like before.

Figures 10 and 11 show a fifth alternative embodiment of the light of Figures 1 and 2. The different elements carry references increased by five hundred. In this variant, the mirror of the base is smooth. The mirror reflects the divergent beam emitted by the source in a beam with rays parallel to axis 5. Referring to Figure 10, this time, the facets 518, 520 of the upstream face 14 of the first blade 12 defining the elements of the first and second sets are generally spherical, here toric by presenting different radii of curvature according to horizontal and vertical directions for make a wider beam in the direction horizontal than vertical. The facets 518, 520 are in relief. The facets 518 and 520 are arranged in several rows and several columns following two nested square matrices. The facets 518 have in elevation a rectangular shape, here square. The facets 518 of the first set are distant from each other others. The facets 520 of the second set are joined by their edges. Each facet 518 is adjacent by its four sides with four facets 520, and reciprocally. The sides of the facets and their alignment directions extend along directions horizontal and vertical. Each facet 518, 520 constitutes a convex converging lens which transforms an elementary beam with rays parallel to the axis from the mirror into an elementary ray beam converge at a focal point of the lens. The facets 518 of the first set and those 520 of the second set here have dimensions adapted so that the same quantity of light passes through the green and red filters.

In addition, with reference to Figure 11, the colored portions or filters 528, 530 of the second slide 22 this time have a rectangular shape, here square, in elevation. The first and second sets of filters are arranged in two nested square matrices one inside the other. The 530 filters of the second set are large and meet at their edges, whereas the filters 528 of the first set are of small in size and distant from each other. So the green filters extend over a red background. The sides of filters and the alignment directions are vertical and horizontal. The homes of spherical facets 518 from first set is in the center of the green filters 528 of the first set. So we can give these green filters 528 a very small area. In this variant, division, coloring and addition of elementary beams are carried out simultaneously according to the vertical and horizontal directions. The dimensions facets 518, 520 and coloring filters 528, 530 are chosen to provide the proportion of flows bright green and red necessary to obtain the White color.

We will now describe with reference to Figures 12 to 15 a sixth alternative embodiment of the fire in which the different elements have numerical references increased by six hundred.

This time, the screen or coloring organ 22 further includes a rectangular frame 640 flat extending around the periphery of the wide red bands 30. The frame 640 has two long horizontal sides, parallel to the wide red bands 30, and two sides short vertical perpendicular to wide bands red. The wide red bands 30 have their ends terminals adjoining the short vertical sides of the frame. The wide red bands 30 and the frame 640 are made of a first plastic material such as polymethyl methacrylate, colored red. The framework 640 extends in continuity of material with the strips large red 30. In other words, it is in one piece or even in one piece with these bands. The 640 frame forms a junction with the wide strips red 30. The downstream face of the frame defines part of the downstream face 26 of the screen.

In this light, the bands 28, 30 have a length greater than or equal to 0.5 times the length of the organ of coloring or screen 22.

The screen 22 also has a thin layer 642 of planar shape extending parallel to the plane general screen. This thin layer 642 is contiguous with the upstream face of the frame 640, wide red bands 30 and narrow bands 28 and defines a free upstream face of screen 22, layer 642 being intended to be oriented towards light source 608. The layer extends thicker than frame 640, with bands wide red 30 and narrow green stripes 28. The thin layer 642 and the narrow green bands 28 are made of a second plastic material, by example a polymethyl methacrylate, colored green. Thin layer 642 extends in continuity of material with the narrow green bands 28. In other words, it is in one piece or in one piece with these bands.

The following dimension is called "thickness" here a direction perpendicular to the plane of the screen 22. We denotes by "c" the uniform thickness of the thin layer 642, by "f" the uniform thickness of the wide strips 30 and narrow 28, and by "e" the total thickness of the screen. We therefore has the following equality e = c + f. We choose c from so that c is significantly less than f, and preferably less than or equal to about 0.5 f. By example, c will be approximately 0.8mm, and f will be approximately 2 mm.

• pour les bandes larges rouges 30 seules : x = 0,666 et y = 0,330 ;
• pour la couche 642 seule : x = 0,435 et y = 0,413.

Each of the first and second plastic materials is evenly colored. For example, the color of each plastic material and the thicknesses of the thin layer 642 and of the bands are chosen to obtain the following respective colors in trichromatic coordinates:

• for the wide red bands 30 only: x = 0.666 and y = 0.330;
• for layer 642 alone: x = 0.435 and y = 0.413.

The dots corresponding to the two colors of the layer 642 alone and wide red bands 30 alone are plotted on the graphical representation diagram colors in trichromatic coordinates of the figure 16. This representation includes a domain D defining the region of white color. The colour green corresponding to thin layer 642 alone is located in this area D. The thin layer therefore has a colorless appearance.

The elementary beams 21 of the second together pass through thin layer 642 then the strips narrow green 28. They are colored in a green located outside domain D, having trichromatic coordinates x = 0.406 and y = 0.426.

The elementary beams 623 of the first together pass through thin layer 642 and then the strips large red 30. This double crossing produced by subtractive synthesis a color very close to the red color of the wide red bands 30, having for trichromatic coordinates x = 0.664 and y = 0.332 as shows the diagram where the points were taken associated. Therefore, the coloring of the beams elementary 23 of the first set is practically unchanged compared to the situation in which thin layer 642 would be absent. In addition, the transmission coefficient of screen 22, at the level of red bands 30 or green bands 28, is very little decreased by comparison with this same situation.

• le symbole "o" représente la couche verte 642 seule ;
• le symbole "Δ" représente la couche verte 642 + les filtres rouges 30 ;
• le symbole "⋄" représente la couche verte 642 + les filtres verts 28 ;
• le symbole "□" représente les filtres rouges 30 ; et
• le symbole "
  
  " représente la couleur résultante du faisceau du feu.

In figure 16:

• the symbol "o" represents the green layer 642 alone;
• the symbol "Δ" represents the green layer 642 + the red filters 30;
• the symbol "⋄" represents the green layer 642 + the green filters 28;
• the symbol "□" represents the red filters 30; and
• the symbol "
  
  "represents the resulting color of the light beam.

The color of the beam emerging from the fire after additive synthesis between the elementary beams of first and second sets so colored individually, has been shown in the diagram. It is located in domain D. Consequently, the presence of thin layer 642 on the entire upstream face 24 of screen 22 nevertheless authorizes an additive synthesis suitable of the elementary beams to obtain the regulatory beam required, here the color white. The thin layer 642 practically does not change the appearance of the fire in the extinguished state, in comparison with the situation in which the thin layer would be absent.

The thin layer 642 ensuring continuity of material of the thin green strips 28 between them, the screen 22 can be manufactured by injection using a mold 644 shown schematically in Figure 17, which has a mold cavity 646 into which open out only two injection nozzles 648, 649. The first nozzle 648 is associated with an injection circuit of the first colored plastic in the first color, here red, to define the 640 frame and the wide bands 30. The second nozzle 649 is associated with a second plastic injection system colored in the second color, here green, with a view to define thin layer 642 and narrow green stripes 28. One can therefore in particular form the frame 640 and all the wide red bands 30 by means of an injection single first material with a single nozzle 648 and then form the thin layer 642 and all the narrow bands green 28 by means of a single injection of the second material with a single injection nozzle 649. The mold has therefore a particularly simple structure.

In addition, the presence of the thin layer 642 improves the mechanical resistance of the screen 22.

• couche 642 seule : x = 0,502 et y = 0,481 ;
• couche 642 et bandes étroites 28 : x = 0,489 et y = 0,501;
• bandes larges 30 seules : x = 0,666 et y = 0,330 ; et
• couche 642 et bandes larges 30 : x = 0,666 et y = 0,334.

The above example is particularly suitable for a reversing light. For a change of direction indicator, we will for example have the following colors in trichromatic coordinates:

• layer 642 alone: x = 0.502 and y = 0.481;
• layer 642 and narrow bands 28: x = 0.489 and y = 0.501;
• wide bands only 30: x = 0.666 and y = 0.330; and
• layer 642 and wide bands 30: x = 0.666 and y = 0.334.

Figure 18 shows a seventh variant of realization of the fire. This variant differs from the sixth variant only by the shape of the bands narrow green 128 and wide red 130. This time, the junction between adjacent strips 128, 130 east formed by flat internal side interfaces inclined relative to the upstream and downstream faces 24, 26, and relative to axis 5. So the narrow green bands 128 have a conical shape in cross section tapering towards the downstream face 24. The upstream facet of these bands has an area greater than the area of their downstream facet. This seventh variant with a layer 642 combines the characteristics of the first and sixth variants.

Figure 19 shows an eighth variant of realization of the fire of figures 1 and 2. The elements different bear references increased by eight cents. This variant differs from the sixth variant only by the shape of the profiled facets or gadroons. On the upstream face 14 of the first blade 12, the elements 818 of the second set associated with the second set of elementary beams 821 are still formed by convex profiled facets in relief. But this time, the 220 elements of the first set associated with the first set of elementary beams 823 consist of profiled facets with cross-section arc-shaped curve, hollow concaves, similarly curvature and the same width as the facets 818 raised profiles. These hollow profiled facets 820 constitute in the vertical planes of the lenses divergent. The same amount of light passes through facets 218 and facets 220.

Thus, each contoured facet in relief 818 transforms the associated elementary beam 221 into a elementary beam in which the components vertical rays converge at focal point F. And each facet 220 hollow profile transforms the beam elementary 223 associated in an elementary bundle in which the vertical components of the rays diverge.

As before, the narrow green bands 28 and large reds 30 color the beams elementaries 221, 223 of the second and first sets of beams. Downstream of each focal point F, the beams elementary 221 of the second set become divergent and then further downstream the beams elementaries 221, 223 of the two sets add up between them to form a single homogeneous beam White. Due to the divergence of the beams elementary 223 of the first set, the largest part of each wide red strip 30 is crossed by the associated beam 823. The hollow facets 820 can be configured to optimize the area of wide red bands 30 crossed by the beams 223.

In FIG. 19, the upstream face 14 of the blade 12 may have slope breaks at the junction between profiled facets 218 and 220 depending on their radii of curvature and their dimensions. This eighth variant provided with a layer 642 combines the characteristics of the second and sixth variants.

In a ninth variant, the fire will conform to the third variant and in addition will include a layer thin continuous similar to that of the sixth variant, the gadroons extending over this thin layer.

In a tenth variant, the fire will conform to the fourth variant and in addition will include a layer thin continuous similar to that of the sixth variant.

In an eleventh variant, the fire conforms to the fifth variant and in addition the screen has a frame and a thin layer similar to those of the sixth variant. The frame extends in continuity of material with the red filters of the first set, and the layer thin extends in continuity of material with filters greens from the second set.

The variants which have just been described may be combined with respect to their compatible characteristics.

The dividing organ and the coloring organ distinct from each other provide a total of four faces, which allows to multiply the possibilities of arrangement of the dividing means and filters coloring on these faces, according to the desired functions. In addition, it follows that the size of the filters coloring is independent of the dimension of the facets beam division with regard to constraints of arrangement of filters and facets. We may in particular provide small green filters dimension and associated dimension facets important to preserve the relative amount of light associated with each color for additive synthesis.

Of course, we can bring to the invention many modifications without departing from the framework of this one.

Thus, in the traffic light of FIG. 3, the organ of coloring may be located not necessarily on the focal plane P, but downstream or upstream thereof, at a distance from the focal plane P less than the distance separating the divider 12 from the focal plane P, namely focal length.

In the light of Figure 1, the coloring 22 may include dispersing means of the beam, for example on its downstream face.

The dividing body may leave the elementary bundles of the second set, the organ of coloring comprising a second set of elements adapted to make each beam converge or diverge elementary of the second set.

The profiled facets associated with the first set of elements may have dimensions different from those associated with the second set elements.

Generally, the streaks of the mirror will be advantageously non-parallel to the profiled facets.

The divider can be configured so that the foci F are not coplanar and constitute a non-planar focal surface but generally perpendicular to axis 5. The coloring organ will then advantageously extend in the vicinity of this area.

The fire may include glass attached to a end of the base and shutter the fire downstream of the organ of coloring. This ice may present means of beam scattering.

The fire according to the invention can be put in works in fields other than vehicles automobiles. It could for example be a fixed light.

Claims (32)

Signaling light especially for vehicle automobile, comprising a suitable light source (8) emitting a light beam, a dividing member (12) suitable for dividing the beam into a first set of elementary beams (21; 221) and a second set elementary beams (23; 223) configured so that the first and second bundle sets elementals add up to each other, and an organ of coloring (22) distinct from the dividing member (12) and carrying a first set of coloring filters (28; 128; 528) arranged in the path of the beams elementaries (23; 223) of the first set, fire comprising a second set of coloring filters (30; 130; 530) arranged in the path of the beams elementary (23) of the second set, characterized in that the coloring member (22) carries the second set of coloring filters (30; 130; 530). Light according to claim 1, characterized in that the coloring member (22) extends away from the dividing member (12). Light according to claim 2, characterized in that the dividing member (12) includes a first set of elements (18; 218; 518) adapted to make converge each elementary beam (21; 221) of the first set and having foci (F) arranged following a focal surface (P) generally perpendicular to a axis (5) of the fire, the coloring member (22) comprising a blade generally extending perpendicular to the axis (5) and in the vicinity of the focal surface (P). Light according to claim 3, characterized in that the coloring member (22) is located on the focal surface (P). Fire according to one of claims 3 to 4, characterized in that the dividing member (12) comprises a second set of elements (20; 520) adapted to make converge each elementary beam (23) of the second together. Fire according to one of claims 3 to 4, characterized in that the dividing member (12) comprises a second set of elements (220) adapted to make diverge each elementary beam (223) from the second together. Fire according to one of claims 5 to 6, characterized in that the dividing member (12) has a blade extending perpendicular to an axis (5) of the light, elements adapted to make each beam converge elementary of the first set and associated elements to each elementary bundle of the second set including facets (18, 20; 218, 220; 518, 520) of a face (14) of the blade. Light according to claim 7, characterized in that the facets (18, 20; 218, 220) are profiled, parallel to each other and with curved section. Light according to claim 8, characterized in that at least some of the facets (18, 20; 218, 220) are in relief. Fire according to claim 8 or 9, characterized in that some of the facets (18, 20; 218, 220) are hollow. Fire according to one of claims 8 to 10, characterized in that the profiled facets (18) of the first set and the profiled facets (20) of the second set are all identical. Fire according to one of claims 8 to 11, characterized in that it comprises a mirror (4) having streaks (10) inscribed in parallel planes between them and not parallel to the profiled facets (18, 20; 218, 220). Fire according to one of claims 8 to 11, characterized in that the coloring member (22) comprises means (330) for dispersing the rays light transmitted by the dividing member (12). Light according to claim 13, characterized in that the coloring member comprises a blade (22) extending perpendicular to an axis (5) of the light, the dispersing means comprising on one face (24) of the blade of profiled facets (330) parallel to each other, with curved section, and extending in a direction perpendicular to the profiled facets (18, 20) of the dividing member (12). Light according to claim 7, characterized in what the facets (518, 520) are of general shape spherical. Light according to claim 15, characterized in that the filters (28) of the second set are distant from each other and arranged in a matrix comprising several lines and several columns. Fire according to one of claims 3 to 4, characterized in that the coloring member (22) includes a second set of elements suitable for making converge each elementary beam (23) of the second together. Fire according to one of claims 3 to 4, characterized in that the coloring member (22) includes a second set of elements suitable for making diverge each elementary beam (23) from the second together. Fire according to claim 17 or 18, characterized in that the elements of the second set include facets of a face (14) of the blade. Fire according to one of claims 1 to 19, characterized in that at least one of the first and the second set of coloring filters (28, 30; 128, 130; 528, 530) includes colored portions in the mass. Light according to claim 20, characterized in that the colored portions in the mass (128, 130) have an upstream facet and a downstream facet, the downstream facet having an area less than one area of the upstream facet. Fire according to one of claims 1 to 21, characterized in that the dividing member (12) comprises a upstream face (14) having Fresnel patterns (433). Fire according to one of claims 1 to 22, characterized in that the coloring member (22) has a generally planar shape, the filters (30) of the first together being made of a first material having a first color, and the filters (28) of the second together being made of a second material having a second color different from the first color, the filters (30) of the first set being alternated with the filters (28) of the second set according to a direction generally parallel to a plane of the organ of coloring, the coloring member comprising a first junction part (40) in continuity with material with filters (30) of the first set and common to these, the coloring member comprising a second junction part (642) in continuity with material with filters (28) of the second set and common to these. Light according to claim 23, characterized in that the second joining part (642) comprises a layer extending parallel to the organ of extra coloring compared to filters (30) of the first set. Light according to claim 24, characterized in that the layer (642) defines a face (24) free of the coloring organ. Light according to claim 25, characterized in that the layer (642) defines a free face (24) of the member (22) oriented towards the source (8). Fire according to any one of claims 24 to 26, characterized in that the layer (642) has a thickness (c) substantially less to a dimension (f) of the filters (30) of the first set in a direction generally perpendicular to the plan of the coloring organ. Light according to claim 27, characterized in that the thickness (c) of the layer (642) is less than or equal to about 0.5 times said dimension (f) filters (30) of the first set. Fire according to any one of claims 24 to 28, characterized in that the filters (30) of the first set are colored in one color having trichromatic coordinates x = 0.666 and y = 0.330, and the layer (642) is colored in one color having trichromatic coordinates x = 0.435 and y = 0.413. Fire according to any one of claims 23 to 29, characterized in that the filters (30) of the first set consist of bands straight each having a length greater than 0.5 times a dimension of the coloring member (22) parallel to these bands. Fire according to any one of claims 23 to 31, characterized in that the first and second materials are plastics. Fire according to one of claims 1 to 30, characterized in that it comprises a base (2), the member coloring (22) being fixed to one end of the base and closing the interior of the fire.

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