EP1605201A1 - Kfz-Signal- und/oder Beleuchtungseinrichtung mit einem Lichtleiter - Google Patents
Kfz-Signal- und/oder Beleuchtungseinrichtung mit einem Lichtleiter Download PDFInfo
- Publication number
- EP1605201A1 EP1605201A1 EP05291258A EP05291258A EP1605201A1 EP 1605201 A1 EP1605201 A1 EP 1605201A1 EP 05291258 A EP05291258 A EP 05291258A EP 05291258 A EP05291258 A EP 05291258A EP 1605201 A1 EP1605201 A1 EP 1605201A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- face
- lighting
- prisms
- signaling device
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/247—Light guides with a single light source being coupled into the light guide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/242—Light guides characterised by the emission area
- F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
Definitions
- the present invention relates to a lighting device and / or signaling equipment fitted to a motor vehicle, including at least one guide optical device capable of producing a homogeneous diffusion of light.
- This guide optical includes prisms that allow to deflect the light rays.
- the invention finds applications in the field of vehicles traveling on roads and, in particular, motor vehicles.
- the optical guide 5 is a cylinder of transparent material provided with prisms, which ensures the propagation of the light beam 4 from a end e1 close to the light source 3 to an end e2 opposite to the end e1.
- This optical guide 5 can have different shapes Geometric. It can, for example, form a circle, an arc or to be rectilinear. In the case of Figure 1, the optical guide 5 follows the shape of the protective glass 2 of the projector 1.
- the invention proposes a lighting and / or signaling device in which the optical guide comprises a serrated profile reflection face and a striated profile exit face.
- the optical guide comprises a serrated profile reflection face and a striated profile exit face.
- Such an exit face has the advantage of straightening an additional angle the light rays reflected by the reflection face, so as to obtain light rays coming out of the optical guide with a negative angle relative to the normal to the X axis (the negative sign is understood in relation to the mean direction of propagation of the light in the guide) , which offers a great flexibility in the choice of the exit angles of the light rays coming out of the optical guide.
- Figures 1 to 5 relate more specifically to the invention according to the first realization.
- Figures 7 to 9 relate more specifically to the invention according to the second realization.
- Figure 6 relates more specifically to the invention combining the first and second embodiments according to the invention.
- the invention will be described below with the aid of two examples, and in both cases, relates to a lighting or signaling device to guide optical system allowing a homogeneous and uniform diffusion of the light.
- the device of the invention may be a projector like that of FIG. well a signaling device. Whether it's a projector or a signaling device, the optical guide has characteristics ensuring a homogeneous and uniform appearance to the light at the exit of the guide optical. In the remainder of the description, a projector will be described, being understood that it can be also a signaling device.
- an example of an optical guide according to the invention which can be mounted in a projector of FIG. shown in FIG. 3.
- the device considered is a position light located in a headlamp at the front of a vehicle.
- the optical guide, in this example is curved and forms a circle or an arc. It is understood that the optical guide, according to the invention may have other forms such as, for example, rectilinear, curve with one or more curvatures ....
- FIG. 3 shows a sectional view of an optical guide intended to propagate a light beam emitted by the light source 3.
- the optical guide 5 has a circular section; it is well heard that it can also, in other embodiments, have a elliptical section, square, oval, even square etc.
- each prism 8 has a substantially triangular shape; each prism has a base 14, a facet 9 and a facet 10, flat and non-parallel.
- the facet 9 and the facet 10 of a prism 8 may be symmetrical with respect to a T axis perpendicular to the X axis of the optical guide, that is to say that they have dimensions and angles B and C identical, on both sides of the bisector T. It is said that the optical guide is symmetrical prisms.
- the facet 9 and facet 10 may also be asymmetrical, i.e. they have different dimensions and / or angles B and C. We say then that the optical guide is asymmetrical prisms.
- the bottom angle D a prism 8 is truncated. In other words, at least some of the angles of bottom D have a truncated area. This truncated area of the angle of bottom D forms a flat part 16.
- a flat part 16 is therefore a flat part of the bottom line curve 11 shown in dashed lines in FIG. the example of FIG. 3, the bottom line 11 coincides with the X axis of the optical guide 5.
- the flats 16 of the bottom angles D are preferably of geometrical shape of type rectangle. They can have different dimensions. These dimensions of flats can vary from one light guide to another. They can also be variable within the same optical guide. In this case, the flats 16 may have different dimensions for each bottom angle D associated with each prism. Some background angles D may also not 16.
- the optical guide 5 comprises at the same time bottom angles D with flats 16 and bottom corners D without flat, by example alternately.
- the size of the flats can be chosen in a decreasing manner from the end e1 towards the end e2 of the optical guide in order to propagate a maximum of light rays towards the end e2.
- the bottom angle D between two prisms 8 is truncated, which allows a light beam to propagate in the optical guide 5 without touching one of the facets 9 or 10 of the prism. Because of this, the radius light is reflected by the flat to the exit face FS so as to to be fully reflected. He then continues his spread in the guide optical.
- the invention also makes it possible to obtain, at the output of the optical waveguide, a flux light distributed, voluntarily, non-uniformly. In this case uneven distribution is controlled to achieve a particular visual effect, for example an alternation of illuminated and unlit areas.
- an optical guide 5 makes it possible to compensate for the decrease in the luminous flux traversing the optical guide between the end e1 and the end e2.
- Uniform or uniform but controlled distribution of the flow light is preferably obtained by means of flat dimensions variables and, more precisely, the width of the flats along the X axis variable.
- the size of the flats 16 is decreasing from the end e1 towards the end e2 of the optical guide 5. This reduction in the size of the flats 16 makes it possible to optimize the guiding the light rays propagating in the optical guide 5.
- a near the end e1, the size of the flats 16 is large, thus allowing much of the light rays not to meet facet 9 or 10 of prism and so to continue their spread towards the end e2.
- the dimension flats 16 is smaller and smaller until it is zero. There is then a large amount of light rays that meet one of the facets 9 or 10 of a prism. These light rays are then reflected towards the face of FS output of the optical guide 5.
- the size of the flats may be be growing from the end e1 to the end e2, or angles of flat bottom can alternate with bottom corners without flat, etc.
- the height 18 of a prism 8 increases in proportion to the decrease in the size of the flat 16 corresponding.
- the reflection face FR is contained between two curves, the along the optical guide. One of the curves is the bottom line 11 and the other curve is the curve Z.
- the two embodiments that have just been described allow both to achieve a decrease in the size of the flats.
- they offer the same light output and the same homogeneity of the light emitted by the optical guide 5 over its entire length.
- the choice of one or the other of these embodiments depends on the visual aspect, even aesthetic, wanted.
- FIG. 7 A first embodiment of this optical guide according to the invention is shown in FIG. 7.
- reflection carries the reference FR and the exit face bears the reference FS, with the same conventions as before.
- the reflection face FR of the guide optical may be identical / similar to the reflection face of the optical guide previously described.
- This reflection face is provided with a succession of prisms 8 placed one after the other so as to form a face to serrated profile.
- the prisms 8 may be identical and symmetrical one to others, as in the prior art, or else identical and asymmetrical or different from each other.
- the prisms 8 are asymmetrical, as shown in FIG. 7, a reflection is obtained at an angle of about 90.degree. ratio to the X axis for light rays having an angle of incidence of the order of 10 to 40 ° with respect to the X axis of the optical guide.
- an air prism 30 is formed by the background of prism that precedes prism 8 in transparent matter; this prism air 30 ensures rectification of the incident light beam.
- reflection face of the optical guide includes prisms in transparent material 8 interposed by air prisms 30, then these air prisms 30 change the trajectory of the light rays in straightening the rays of light before they meet a prism 8.
- trajectory light beam 17 adjusted with an angle of incidence E included between 10 and 40 ° with respect to the X axis of the optical guide.
- This light ray 17 is deflected and straightened along a path 18 by the air prism 30 before to be reflected by the facet 10 of the prism 8. It is then redirected, following the path 19, towards the exit face FS of the optical guide in one direction preferred overall perpendicular to the axis X of the guide.
- This light beam, of trajectory 21 has an angle of incidence E 'of approximately 5 ° relative to the X axis of the optical guide.
- This light ray is therefore in the configuration of a total reflection by the prism in matter 8.
- This ray 21 is reflected, by the facet 10 of the prism 8, at an angle of approximately 90 ° to the X axis to the FS exit face of the optical guide.
- the asymmetric prisms have the same effect on the light ray than symmetrical prisms.
- asymmetric prisms have a recovery effect, in addition of the reflection effect, when the light beam has an angle of incidence of 10 at 40 °.
- Asymmetric prisms therefore make it possible to increase the yield light towards the exit face 6 of the optical guide.
- the output face FS of the optical guide has a striated profile.
- the FS exit face has streaks that make it possible to straighten again the light rays at the exit of the guide optical.
- These striations are reliefs (bosses or hollows) made in the face output 6 of the optical guide. They can be of different shapes.
- these striations 24 each have a form of prism, that is to say that each stripe 24 has two facets 25 and 26, planes.
- a facet 26 of a streak and a facet 25 of a consecutive streak together form a bottom angle H of about 90 °.
- the facet 25 of a strip 24 forms, with the axis X of the optical guide, an angle of streak K of the order of 10 to 20 °.
- the streaks 24 of the FS exit face have a lower depth than the prisms 8 of the reflection face FR, this in order to keep the optical guide its guiding characteristics.
- the streaks form a bottom line 16 of the streaks.
- the bottom of each streak 24 (by opposition at the top of the streaks) forms with the bottom consecutive streaks a curve called bottom line 16 of the streaks.
- Streaks 24 are therefore contained between the bottom line 16 and a curve connecting the top of all the striations 24, these two curves generally following the profile of the guide.
- prism-shaped striations may be symmetrical or, at contrary, asymmetrical as shown in Figure 7.
- the streaks of the same guide optics are identical.
- the streaks are different, that is to say that they have a stripe angle K and / or an angle of bottom H which can vary between the end e1 of the guide and the end e2, so to allow an evolutionary reflection of light rays along the entire length of the guide.
- each streak 24 of the output face FS is located opposite a prism 8 of the FR reflection face.
- Streaks 24 of the FS output face therefore have a pitch identical to the pitch of the prisms 8 of the face reflection FR.
- the active areas of the FS exit face that is to say the facets 25 streaks 24, are located in face (at least partially opposite) of the active areas of the prisms 8 of the reflection face FR, that is to say the facets 10 of the prisms 8.
- the light beam of trajectory incoming 17 undergoes, as previously explained, a first reflection by the facet 10 of a prism 8. It is then refracted by the facet 25 of a streak 24 and out of the optical guide with a negative angle G relative to the normal N to the axis X. Similarly, the light ray 21 undergoes the same path from the facet 10 of the prism.
- the exit angle G thus obtained depends on course of the slope of the stripe 24. In the example of Figure 3, this exit angle G is of the order of -20 ° relative to normal N.
- This embodiment of the output face in prisms thus allows to send light rays in a direction impossible to reach by total reflection on the prisms of the reflection face when the exit face is smooth. It makes it possible to obtain a negative angle G of approximately -25 ° with respect to the normal N.
- each stripe 24 has an arcuate shape.
- each streak 24 forms a kind of dome forming, with the consecutive streak, a bottom angle H.
- the tangent at the base of the dome makes an angle K of 10 ° to 20 ° with respect to the X axis of the optical guide.
- Each stripe 24 of the output face FS is located opposite a prism 8 of the reflection face FR.
- Streaks 24 therefore have an identical pitch at the pitch of the prisms 8 of the reflection face FR.
- streaks 24 of the FS exit face are located opposite the active areas of the prisms 8 of the reflection face FR.
- This embodiment has the advantage of allowing a controlled distribution of light around the normal N, which allows to homogenize the appearance of the guide for an outside observer.
- two examples of light rays have been shown in Figure 8, which may have different directions at the output of the optical guide.
- the first example of a light ray is the light ray of incoming trajectory 17 having an angle of incidence E, from 10 to 40.degree. to the X axis.
- This light ray is first deflected by an air prism 30 then reflected by about 90 ° by a prism 8 to the output face FS.
- said light beam is subjected to refraction of a negative angle G with respect to the normal N (path 20).
- the second example of light ray is the trajectory radius incoming 21 having an angle of incidence E 'with the axis X.
- This light ray 21 undergoes a first reflection by a prism 8 of the reflection face FR.
- said light ray 21 undergoes refraction with a positive angle G relative to normal N (trajectory 23).
- This profile in domes of the output face FS thus makes it possible to distribute the light laterally in several directions.
- each streak 24 has a curved facet 28 and a plane facet 27, each curved facet 28 being consecutive to a flat facet 27.
- the curved facet 28 and the flat facet 27 of a streak consecutively together form a bottom angle H of the order of 90 °.
- the tangent to the curved facet 28 forms, along with the X axis of the optical guide, a streak angle K of the order of 10 to 20 °.
- the Striations are contiguous to each other, ie a streak is contiguous to the next streak.
- This third embodiment associates features of the first embodiment with features of the second embodiment, which makes it possible to optimize the guidance of the radii light through the optical guide, while guaranteeing good homogeneity of light and a sending of light in directions classically inaccessible.
- the first example of radius light 17 is refracted, by a streak 24 of the exit face 6, with a angle G negative relative to normal N.
- the second example of radius light 21 out of the optical guide with a negative angle G relative to the normal N different from the angle G formed by the light beam 20.
- the value of the exit angle G differs depending on the location on the streak. So we understand that the angle of output G varies depending on the location, on the facet 28 of the streak 24, the point of contact of the light ray with the streak. In other words, the value the angle of exit depends on the radius of curvature of the curved facet 28.
- FIG. 9B shows a variant of the embodiment of Figure 9A.
- the ridges 24 of the FS exit face form curved non-contiguous facet prisms. More precisely, each groove 24 has a curved facet 28 and a flat facet 27, each curved facet 28 being separated from the flat facet 27 of the streak The striations 24 are therefore separated from each other by a flat surface.
- the active zone of each streak 24, that is to say the curved facet 28 is placed opposite (at least partially) of the active area of the prism 8, that is to say the facet 10 of the prism in order to make refraction by the streaks as efficient as possible.
- the 29, in this variant makes it possible to propagate at the end e2, the light rays not refracted by streaks 24.
- the exit face 6 has ridges which make it possible to straighten the light rays at the output of the optical guide, that is to say to get them out of the optical guide with a negative angle relative to normal N to the X axis of the guide.
- the reflection face comprises prisms such as those described using the Figure 4 in particular. Associate the two embodiments of the invention on a same light guide is very advantageous.
- the streaks of the output face FS can be of different shapes, for example, in the form of prisms or domes or a combination of prisms and domes, as seen above with figures 7 and 8. They are located opposite the active areas of the prisms 8 of the face reflection.
- the prisms of the reflection face can be those described in FIG. 3, 4 or 5.
- the presence of flats 15 in the optical guide makes it possible a light beam, to propagate in the optical guide without touching a facets 9 or 10 of the prisms 8 of the reflection face FR.
- the light beam is reflected back to the exit side of the light guide, further in the guide, which distributes the luminous flux uniformly between the ends e1 and e2 of the optical guide.
- the examples described above, and, more generally, the light guides according to the invention have sections of circular preference, since such a section is the most appropriate in terms of optical guidance. This section is also very appropriate in terms of focusing of light. But the invention also light guides of different section, for example a section of conical shape, for example of elliptical, hyperbolic or parabolic, at least partially, or oval. Type sections parallelogram, square, rectangle are also possible but less interesting in terms of light guidance.
- streaks and / or prisms can have variable widths (ie, affect more or less the width of the face in question, either wholly or partially, either with a variable width along the length of the guide).
- the invention therefore proposes two light guide embodiments, alternatives, or cumulative, to have a better visual homogeneity of the guide once turned on and / or have more control over the orientation of the light emitted by the light guide.
- To cumulate the two achievements is very advantageous, because they contribute to the same goal, that of improving the visual light guides once lit.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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FR0406376 | 2004-06-11 | ||
FR0406375 | 2004-06-11 | ||
FR0406375A FR2871550B1 (fr) | 2004-06-11 | 2004-06-11 | Dispositif d'eclairage ou de signalisation a guide optique pour vehicule automobile |
FR0406376A FR2871551B1 (fr) | 2004-06-11 | 2004-06-11 | Dispositif d'eclairage ou de signalisation a guide optique pour vehicule automobile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1605201A1 true EP1605201A1 (de) | 2005-12-14 |
EP1605201B1 EP1605201B1 (de) | 2010-07-14 |
Family
ID=34942403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05291258A Active EP1605201B1 (de) | 2004-06-11 | 2005-06-10 | Kfz-Signal- und/oder Beleuchtungseinrichtung mit einem Lichtleiter |
Country Status (5)
Country | Link |
---|---|
US (1) | US7437050B2 (de) |
EP (1) | EP1605201B1 (de) |
JP (1) | JP2005353599A (de) |
AT (1) | ATE474184T1 (de) |
DE (1) | DE602005022254D1 (de) |
Cited By (6)
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FR2891891A1 (fr) | 2005-10-11 | 2007-04-13 | Valeo Vision Sa | Dispositif d'eclairage ou de signalisation a guide optique pour vehicule automobile |
EP1992868A1 (de) | 2007-05-15 | 2008-11-19 | Valeo Vision | Beleuchtungseinrichtung für Kraftfahrzeuge |
EP2476947A2 (de) | 2011-01-14 | 2012-07-18 | Valeo Vision | Vorrichtung zur Beleuchtung oder Signalisierung mittels Lichtwellenleiter für Kraftfahrzeug |
EP2662713A1 (de) * | 2012-05-07 | 2013-11-13 | Hella KGaA Hueck & Co. | Beleuchtungsvorrichtung für Fahrzeuge |
CN105445835A (zh) * | 2006-10-31 | 2016-03-30 | 莫迪里斯控股有限责任公司 | 照明装置及照明系统 |
FR3129122A1 (fr) | 2021-11-17 | 2023-05-19 | Valeo Vision | Module lumineux avec fonctions d’éclairage et de signalisation |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2891891A1 (fr) | 2005-10-11 | 2007-04-13 | Valeo Vision Sa | Dispositif d'eclairage ou de signalisation a guide optique pour vehicule automobile |
US7726854B2 (en) | 2005-10-11 | 2010-06-01 | Valeo Vision | Lighting or signal device with an optical guide for a motor vehicle |
CN105445835A (zh) * | 2006-10-31 | 2016-03-30 | 莫迪里斯控股有限责任公司 | 照明装置及照明系统 |
EP1992868A1 (de) | 2007-05-15 | 2008-11-19 | Valeo Vision | Beleuchtungseinrichtung für Kraftfahrzeuge |
EP2476947A2 (de) | 2011-01-14 | 2012-07-18 | Valeo Vision | Vorrichtung zur Beleuchtung oder Signalisierung mittels Lichtwellenleiter für Kraftfahrzeug |
US8820991B2 (en) | 2011-01-14 | 2014-09-02 | Valeo Vision | Lighting or signalling device with optical guide for motor vehicles |
EP2662713A1 (de) * | 2012-05-07 | 2013-11-13 | Hella KGaA Hueck & Co. | Beleuchtungsvorrichtung für Fahrzeuge |
FR3129122A1 (fr) | 2021-11-17 | 2023-05-19 | Valeo Vision | Module lumineux avec fonctions d’éclairage et de signalisation |
WO2023088826A1 (fr) | 2021-11-17 | 2023-05-25 | Valeo Vision | Module lumineux avec fonctions d'éclairage et de signalisation |
Also Published As
Publication number | Publication date |
---|---|
US7437050B2 (en) | 2008-10-14 |
ATE474184T1 (de) | 2010-07-15 |
DE602005022254D1 (de) | 2010-08-26 |
US20050276565A1 (en) | 2005-12-15 |
EP1605201B1 (de) | 2010-07-14 |
JP2005353599A (ja) | 2005-12-22 |
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