• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a light guide (2) comprising a transparent body (4) generally elongate in a main direction with an outer facet (12) forming with the environment of said body a diopter, a first row (16) of inclined facets (20) adapted to reflect the rays for their output, and at least a second row (14, 18) of reflection facets (24) smaller than the corresponding reflection facets (20) of the first row ( 16). The light reflected by the second row or rows completes the light beam from the first row. The widths of the first row and the second rows may gradually increase and decrease, respectively, from the light source so as to compensate for the progressive losses of light traveling through the light guide.
    公开号:FR3032512A1
    申请号:FR1550920
    申请日:2015-02-05
    公开日:2016-08-12
    发明作者:Lamberterie Antoine De；Christophe Valois
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to the field of light guides, particularly for a module and a lighting and / or signaling device for a motor vehicle. BACKGROUND OF THE INVENTION
    [0002] Patent document FR 2 871 550 A1 discloses a light guide for a lighting or signaling device for a motor vehicle, the guide comprising a transparent body generally elongated in a main direction with an outer surface forming with the environment of said body a diopter and reflection facets distributed along its outer surface. The reflection facets are of prismatic profile so as to deflect light rays traversing the guide by successive reflection on the diopter. This deflection allows the rays in question to meet the diopter with an angle of incidence less than the limit angle of total reflection and thus out of the body of the guide. The prismatic reflection facets have a variable profile along the guide so as to at least partially compensate for the progressive loss of light related essentially to their gradual exit. To do this, the prismatic profile may have a variable height and / or spacing. The adjacent prismatic facets may indeed be distant from each other, this distance may then decrease along the guide from the light source. The prismatic facets may have a variable height, this height increasing along the guide from the light source. The loss compensation solution disclosed in this teaching is interesting. However, it has the disadvantage that it is likely to form an irregular image given the variation of the pitch and / or the height of the prismatic facets along the guide.
    [0003] As a result, the compensation allowed by this solution is limited if it is desired to limit the effect of irregularity on the image produced. Patent document EP 1 780 463 A1 also discloses a light guide for a lighting or signaling device for a motor vehicle. Similar to the previous teaching, the transparent body of the guide includes reflection facets intended to bring rays of the guide along the latter. The reflection facets have a pseudo-prismatic profile ie they are curved and / or form a break so as to have different inclinations. The objective of this measure is to improve the homogeneity of the luminous flux for angles of view deviating from the main viewing angle, that is to say angles of view deviating from the axis longitudinal axis of the vehicle. Patent document EP 0 935 091 A1 also discloses a light guide 5 for a lighting or signaling device for a motor vehicle. Similar to the previous teachings, it comprises reflection facets distributed along its outer surface, these facets having a prismatic profile so as to deflect light rays traveling through the guide by successive reflection on the diopter. Similar to the first teaching mentioned above, it provides measures to compensate for the progressive loss of light along the guide. These measures consist essentially of varying the width of the prismatic facets along the guide, more particularly to increase gradually as one moves away from the entrance face of the guide illuminated by a light source. These measurements, however, have the disadvantage that the portions of prismatic facets with reduced widths produce a very narrow beam. In other words, the beam has a significant inhomogeneity for viewing angles deviating from the main viewing angle, that is to say angles of view deviating from the longitudinal axis of the vehicle.
    [0004] The object of the invention is to propose a light guide that overcomes at least one of the disadvantages mentioned above. More particularly, the object of the invention is to propose a light guide capable of producing a light beam that is as homogeneous as possible, more particularly still capable of producing a light beam whose homogeneity in the direction of the guide as well as transversally to the guide. is improved. The invention relates to a light guide comprising: a transparent body generally elongate in a main direction with an outer surface forming with the environment of said body a diopter; ray output means extending along the outer surface of the body and able to extend transverse to the body of the light rays propagating there; notable in that the ray output means comprises: a first row of consecutively arranged means; and at least a second row of means arranged consecutively, the distance separating two consecutive means of the first and / or of the second rows being variable along said row or rows. By means arranged consecutively means that the means in question are arranged consecutively along the outer surface of the guide.
    [0005] The means of the first and / or second row (s) are advantageously inclined reflection facets capable of reflecting the rays with a view to their exit. The reflection facets of the second row or rows are advantageously smaller than the corresponding reflection facets of the first row, that is to say the adjacent facets of the first row.
    [0006] The first row and the second row or rows are preferably parallel and side by side. The second row (s) is (are) adjacent to the first row in a transverse direction. The angle of inclination of the reflection facets of the first row and / or the row or rows is preferably constant. It may, however, vary along the body of the guide. The same goes for the size of these facets. According to an advantageous embodiment of the invention, the ray output means are prisms each formed a reflection facet and a connecting facet, the reflection and connecting facets of each prism being joined by one of their edges.
    [0007] The bonuses can have a V-shaped profile so that one of the facets of the prism, in this case the facet of reflection, is able to reflect by total reflection transversely to the main direction of the guide the rays reaching it. . The reflection facets can be flat, convex or concave. According to an advantageous embodiment of the invention, the first row comprises connecting facets 25 between the inclined facets so as to form prisms, and, preferably, said connecting facets form with perpendiculars to the main direction of the body and passing by said facets, respectively, an angle less than 30 °, more preferably less than 20 °, more preferably still less than 10 °. A connecting facet connects two consecutive inclined facets 30.
    [0008] 3032512 4 The profile of the reflection facets and the connecting facets is such that these facets form prismatic volumes. According to an advantageous embodiment of the invention, the connecting facets are adjacent to the respective reflection facets.
    [0009] According to an advantageous embodiment of the invention, the distance separating two consecutive means of the first row is zero and the distance separating two consecutive means of the second row or rows is variable along said row or rows. According to an advantageous embodiment of the invention, the distance separating two consecutive means 10 of the second row or rows is zero and the distance separating two consecutive means of the first row is variable along said row. According to an advantageous embodiment of the invention, the distance separating two consecutive means of the first row is variable along said row and the distance separating two consecutive means of the second row or rows is variable along said row or rows. According to an advantageous embodiment of the invention, the reflection facets of the second row or of at least one of the second rows are inclined facets whose length I is less than the length L of the corresponding inclined facets of the first row, the length I being preferably less than 30% of the length L, more preferably 50%, more preferably still 70%. According to an advantageous embodiment of the invention, the inclined facets of the second row or second rows are aligned with the corresponding inclined facets of the first row. According to an advantageous embodiment of the invention, the second row or rows comprise a first and a second connecting facet between the inclined facets, respectively; the first facets being generally parallel to the main direction of the body and the second facets forming with perpendiculars to the main direction of the body and passing through said facets, respectively, an angle less than 30 °, more preferably less than 20 °, more preferably Still less than 10 °. The first binding sources corresponding to a clipping or truncation of prismatic volumes formed by pairs of consecutive inclined facets and second connecting facets. According to an advantageous embodiment of the invention, the second connecting facets of the second row or rows are aligned with the connecting facets of the first row, respectively. According to an advantageous embodiment of the invention, the second connecting facets of the second row or rows have a height h less than the height H of the corresponding connecting facets of the first row, the height h being preferentially less than 30% of the height H, more preferably 50%, more preferably 70%. According to an advantageous embodiment of the invention, the width of the first row and / or of the second row or rows varies along the main direction of the body. According to an advantageous embodiment of the invention, the width of the first row decreases and the width of the or at least one of the second rows increases along the main direction of the body in a given direction. According to an advantageous embodiment of the invention, the width of the first row decreases and the width of the or at least one of the second rows increases along a first portion of the body in a given direction, and conversely along a second portion always in the same direction, said second portion being preferentially adjacent to the first. According to an advantageous embodiment of the invention, the reflection facets of the second row or rows are less than 70%, preferably 50%, more preferably 30% of the corresponding reflection facets of the first row.
    [0010] According to an advantageous embodiment of the invention, the guide comprises two second rows arranged on either side of the first row. According to an advantageous embodiment of the invention, the cumulative width of the first row and the second row or rows is essentially constant, preferably over more than 50%, more preferably 70%, more preferably still 90% of their length.
    [0011] According to an advantageous embodiment of the invention, the reflecting facets of the second row or rows are scattering rough facets. The invention also relates to a lighting and / or signaling module, comprising a light guide and at least one light source, remarkable in that the light guide is in accordance with the invention. According to an advantageous embodiment of the invention, the module comprises at least one light source at each end of the light guide. The invention also relates to a lighting and / or signaling device comprising a housing and a lighting module and / or signaling, remarkable in that the module is in accordance with the invention. The measures of the invention are advantageous in that they make it possible to generate a homogeneous light beam along the main direction of the light guide and also transversely, preferably perpendicularly, to this direction. Essentially, the first row may be configured to progressively compensate for light losses along the guide and thereby provide homogeneity along the main direction of the guide. The second row (s) make it possible to complete the light beam in a direction transverse to the main direction. The second row or rows may also participate in homogeneity along the main direction.
    [0012] Other features and advantages of the present invention will be better understood from the description and drawings in which: FIG. 1 is an illustration of a light guide according to the invention; - Figure 2 is a sectional view along II-II of the guide of Figure 1; FIG. 3 is a detail view of the rows of reflection facets of the light guide of FIGS. 1 and 2; FIG. 4 is an elevational view of the light guide of FIGS. 1 to 3, schematically illustrating the rows of reflection facets; - Figure 5 is a sectional view of the guide of Figures 1 to 4, illustrating the impact of the different rows of reflection facets on the light beam 30 produced; Figure 6 is an elevational view of a light guide according to a second embodiment, schematically illustrating the rows of reflection facets. Figure 1 illustrates a light guide according to the invention. The light guide 25 comprises a transparent body 4 extending in a main direction. It can extend straight, curved or a combination of both. Its section can take various forms, such as a circular, oval or polygonal shape. The transparent body 4 may be made of glass or plastic material such as in particular polycarbonate or plexiglass. It comprises an input face 6 at one of its two ends, in front of which is disposed one or more light sources 8. The light rays emitted by the light source (s) 8 penetrate the transparent material 4 of the light guide for s to propagate by transmission and successive reflections on the diopter formed by the outer surface of the body and the ambient air. Indeed, the transparent material body has a refractive index greater than that of the ambient air, typically of the order of 1.5 whereas that of air is 1. The light rays such as those represented by lines interrupted in Figure 1 meet the diopter with angles of incidence greater than the maximum angle of refraction (known by the law of Snell-Descartes). These rays are then reflected successively and propagate in the body 4 essentially in its main direction. The transparent body 4 comprises reflecting facets inclined on a portion of its outer surface. This portion may correspond to a fraction of the periphery of the body, for example less than a quarter, or even less than one fifth of the periphery. It may extend over all or most of the length of the body or, alternatively, over a reduced part only of the body, depending in particular on the intended application. These reflective facets 10 make it possible to deflect the spokes in directions transverse to the main axis of the guide and, consequently, to remove them from the guide, thus generating a light beam.
    [0013] The rays forming the light beam emerge from the body of the guide through a portion of the body substantially opposite the portion comprising the reflective facets 10. This portion is usually referred to as the exit face, the portion having the facets of reflection being usually referred to as the reflection face. FIG. 2 illustrates in more detail the reflection facets 10 intended to bring out the light rays from the body of the guide. This is a sectional view II-II of the guide of Figure 1. It can identify the outer surface 12 of the body 4 of the guide 2 forming the diopter. It can also be observed that the portion of reflective facets 10 comprises three zones: a first central zone 16 and two lateral zones 14 and 18, on either side of the central zone. The central zone 16 constitutes a first row of inclined reflective facets and the lateral zones 14 and 18 constitute second rows of reflecting facets of smaller size than those of the first row, as will be detailed hereinafter with reference to FIG. 3. Fig. 3 is an enlarged view of the reflecting facets 10 of the guide of Figs. 1 and 2. This is a view through the guide body of transparency, the material of the body being present above the relief. illustrated and the ambient air being present below said relief. The central row 16 corresponds to a first row of reflecting facets with the prismatic profile. More specifically, the first row 16 comprises inclined reflection facets 20 and connecting facets 22, a connecting facet 20 connecting two adjacent inclined facets. Each pair of inclined facets 20 and adjacent links 22 form a prismatic volume. The inclined facets 20 may all have substantially the same inclination angle. The connecting facets 22 are close to the perpendicular to the main direction of the body. They form with perpendiculars to the main direction of the body and passing through said facets, respectively, an angle less than 30 °, more preferably less than 20 °, more preferably still less than 10 °. The rays propagating through the material of the guide body and meeting one of the inclined facets 20 can then be reflected transversely towards the exit face of the body, opposite the face with the reflection facets 10.
    [0014] The lateral rows 14 and 18 correspond to second rows of reflecting facets. This is also inclined facets 24, similarly to the inclined facets 20 of the first row. These inclined facets 24 are, however, of substantially smaller size than those of the first row 16. They may be in alignment with the inclined facets of the first row, as can be seen in FIG. 3. The second rows also comprise connecting facets between the inclined facets 24. They comprise first connecting facets 28 extending essentially in the main direction of the guide, and second connecting facets 26 extending in a direction close to perpendicular to the main direction of the guide, similarly to the connecting facets 22 of the first row 16. Similar to the inclined facets of the first and second rows, the second connecting facets 26 of the second row or rows may be aligned with the connecting facets 22 of the first row . Each pair of inclined facets 24 is connected by a first connecting facet 28 and a second connecting facet 26. In other words, the first connecting facet 28 corresponds to the truncation of the prism formed by an inclined facet 24 and a second or second connecting facet 26 connected to the inclined facet by the first connecting facet 28. The second or second rows therefore comprise inclined facets corresponding to prisms whose apex is truncated. Similar to the reflection phenomena on the inclined facets of the first row, the rays propagating through the material of the guide body and meeting one of the inclined facets 24 can then be reflected transversely towards the exit face of the body, opposite the The inclined facets 20 of the first row 16 have a length L greater than the length I of the inclined facets of the second row or rows 14 and 18. The lengths L and I of the inclined facets correspond to measuring facets inclined in one direction in a plane including the main direction. The length I may be less than 30%, preferably 50%, more preferably 70% of the length L. The connecting facets 22 of the first row 16 have a height H greater than the height h of the second connecting facets 26 of the or the second rows 14 and 18. The heights H and h of the connecting facets 30 correspond to the measurement of the connecting facets in a direction in a plane comprising the main direction. The height h may be less than 30% of the height H, preferably 50%, more preferably 70%.
    [0015] 303 2 5 1 2 10 The first connecting facets 28 of the second row or rows 14 and 18 are longer as the inclined facets and the second connecting facets of the second row or rows are smaller than those of the first and second rows In practice, the arrangement of the reflection facets 10 as detailed in FIG. 35 has the effect that the inclined facets 24 of the second rows 14 and 18 reflect less luminous flux than those of the first rows 16. however, to complete the light beam, especially in areas deviating from its main direction. The width of the first row 16 can evolve along the guide, in particular increase as one moves away from the entrance face and the light source (s). In this case, the inclined reflective facets 20 see their width and thus their surface gradually increase. This makes it possible to compensate for the gradual decrease in the luminous flux propagating along the guide, linked to the exit of a portion of the rays in order to form the beam. The width of the second row or rows may also vary along the guide. It can evolve in the opposite direction to that of the first row, that is to say that it can decrease as the width of the first row increases. Indeed, the increase in width of the first row makes it possible to generate a beam whose homogeneity in a direction perpendicular to the main direction of the guide 20 becomes better, that is to say according to observation directions s' away from the main beam direction. The need to complete the beam with the second row or rows then becomes less important. Alternatively, the width of the second row or rows may remain constant while the width of the first row varies.
    [0016] FIG. 4 is an elevational view of the reflection facet surface 10 of the guide of FIGS. 1 to 3, schematically illustrating the evolution of the respective widths of the first and second rows 16 and 14/18, respectively . The left end corresponds to the input face 6 (Figure 1) of the guide and the light source or sources. It can be seen that the first row 16 has a width 13, and the second rows have widths 12 and 12. The width 13 of the first row 16 increases progressively from the left end corresponding to the light entry until at the opposite end. The widths and 12 of the second rows 14 and 18 may be equal and decrease respectively in proportion to the increase in the width of the first row 16, the cumulative width I remaining substantially constant. This arrangement thus makes it possible to compensate the gradual exit of rays by increasing the size of the prismatic reflection facets of the first row. The complement of the light beam by the second rows can then be progressively reduced in view of this increase in the size of the prismatic reflection facets of the first row. Figure 5 is a cross-sectional view of the body 4 of the light guide 2 of Figures 1 to 4. It illustrates the production of the light beam by the first and second rows 16 and 14/18, respectively. It can indeed be observed that the inclined reflecting facets 20 of the first row 16 essentially generate the central part of the light beam, centered on the optical axis of the lighting device. It can also be observed that the inclined reflective facets 24 of the second rows 14 and 18, these facets being of smaller size, complete the beam in particular in zones lateral to the optical axis.
    [0017] The first row 16 thus makes it possible to generate the central portion of the beam homogeneously along the guide by compensating for the variation in size of the inclined facets the gradual loss of luminous flux along the guide. The second row (s) make it possible to complete the beam, in particular in zones remote from the optical axis of the light guide and its associated module and device. This is particularly true for those portions of the guide where the size of the first-row reflection facets are smallest, especially where they are the narrowest. It should be noted that depending on the application considered, only one second row may be sufficient. The presence of two second rows, or even more, on either side of the first row, makes it possible to complete the beam on two opposite sides. It should also be noted that the second row or rows may be scattered rough facets. They can then comprise a large number of small reflecting facets oriented randomly in directions mostly in the rough facet. The light traversing the guide and meeting this or these rough facets is reflected in a large number of directions whose normal to the corresponding rough facet portion is the main component, and the energy of the incident ray is redistributed in a multitude of reflected rays . This is a diffuse reflection capable of completing the 3032512 12 light beam produced by the first row. The average size of the small reflecting facets of a rough row can be less than 1 mm, preferably 0.5 mm, more preferably 0.2 mm. FIG. 6 is an elevational view of the face of the reflection facets of a light guide 5 according to a variant of the guide of FIGS. 1 to 5. The reference numbers of the guide of FIGS. 1 to 5 are used here for the elements identical or corresponding, these numbers however being increased by 100 in order to clearly distinguish the two embodiments. FIG. 6 schematically illustrates the evolution of the respective widths of the first and second rows 116 and 114/118, respectively, of the guide 102, all other things being equal to those of the guide of FIGS. 1 to 5. It can be seen that the body 104 of the guide 102 comprises two inlet faces 106 and 130 at its two ends. The first row 116 of reflective facets has a reduced width at each of the two input faces, this width gradually increasing from the input faces to a central portion of the guide. The second rows 114 and 118 on either side of the first row 116 see their width evolve in the opposite direction, preferably so as to have a substantially constant total width. Other embodiments are possible, particularly with regard to the variations in size of the reflective facets of the first and second rows.
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. A light guide (2; 102) comprising: - a transparent body (4; 104) generally elongate in a main direction with an outer surface (12; 112) forming with the environment of said body a diopter; - ray output means extending along the outer surface of the body, able to emerge transversely from the body of light rays propagating there; characterized in that the ray output means comprises: - a first row (16; 116) of consecutively arranged means; and - at least one second row (14, 18; 114, 118) of means arranged consecutively, the distance separating two consecutive means of the first and / or the second row or rows being variable along said row or rows.
    [0002]
    2. Light guide (2; 102) according to claim 1, characterized in that the ray output means (14, 16, 18; 114, 116, 118) are prisms each formed a reflection facet (20, 24; 120, 124) and a connecting facet (22, 26, 28; 122, 126, 128), the reflection and connecting facets of each prism being joined by one of their edges.
    [0003]
    A light guide (2; 102) according to claim 2, characterized in that the connecting facets (22; 122) of the first row form with perpendiculars to the principal direction of the body and passing through said facets, respectively, an angle less than 30 °, more preferably less than 20 °, more preferably still less than 10 °.
    [0004]
    4. Light guide (2; 102) according to one of claims 1 to 3, characterized in that the distance separating two consecutive means of the first row is zero and the distance separating two consecutive means of the second row or rows is variable along said row or rows. 3032512 14
    [0005]
    5. Light guide according to one of claims 1 to 3, characterized in that the distance separating two consecutive means of the second row or rows is zero and the distance separating two consecutive means of the first row is variable along said row.
    [0006]
    6. Light guide according to one of claims 1 to 3, characterized in that the distance separating two consecutive means of the first row is variable along said row and the distance separating two consecutive means 10 of the second row or rows is variable along said one or more rows.
    [0007]
    Light guide (2; 102) according to one of Claims 2 to 6, characterized in that the reflection facets (24; 124) of the second row or of at least one of the second rows (14; 18; 114, 118) are inclined facets whose length I is less than the length L of the corresponding inclined facets (20; 120) of the first row (16; 116), the length I being preferably less than 30% of the length L, more preferably 50%, more preferably still 70%. 20
    [0008]
    Light guide (2; 102) according to claim 7, characterized in that the inclined facets (24; 124) of the second row or second rows (14,18; 114,118) are aligned with the inclined facets. corresponding (20; 120) of the first row (16, 116). 25
    [0009]
    9. Light guide (2; 102) according to one of claims 7 and 8, characterized in that the second row or rows (14, 18; 114, 118) comprise a first and a second connecting face (28, 26; 128, 126) between the inclined facets (24; 124), respectively; the first facets (28; 128) being generally parallel to the main direction of the body and the second facets (26; 126) forming with perpendiculars to the principal direction of the body and passing through said facets, respectively, an angle of less than 30; °, more preferably less than 20 °, more preferably still less than 10 °. 303 2 5 1 2 15
    [0010]
    10.Light guide (2; 102) according to claims 3 and 9, characterized in that the second connecting facets (26; 126) of the second row or rows (14,18; 114,118) are aligned with the connecting facets (22; 122) of the first row (16; 116), respectively.
    [0011]
    11. A light guide (2; 102) according to claims 3 and 9 or claim 10, characterized in that the second connecting facets (26; 126) of the second row or rows (14,18; 114,118). have a height h less than the height H of the corresponding connecting facets (22; 122) of the first row (16; 116), the height h being preferentially less than 30% of the height H, more preferably 50%, more preferentially still 70%.
    [0012]
    12. Light guide (2; 102) according to one of claims 1 to 11, characterized in that the width of the first row (16, 116) and / or the second row or rows (14, 18; 114, 118) varies along the main direction of the body (4; 104).
    [0013]
    13. Light guide (2; 102) according to one of claims 1 to 12, characterized in that the width of the first row (16; 116) decreases and the width of the or at least one of the second Rows (14, 18, 114, 118) increase along the main body direction (4; 104) in a given direction.
    [0014]
    14. Light guide (102) according to one of claims 1 to 13, characterized in that the width of the first row (116) decreases and the width of the or at least one of the second rows (114, 118) increases along a first portion of the body (104) in a given direction, and inversely along a second portion always in the same direction, said second portion being preferably adjacent to the first. 30
    [0015]
    15. Lighting and / or signaling module, comprising a light guide and at least one light source, characterized in that the light guide (2, 102) is in accordance with one of claims 1 to 14. 3032512 16
    [0016]
    16.Module according to claim 15, characterized in that it comprises at least one light source (8; 108) at each end of the light guide.
    [0017]
    17.Dispositif lighting and / or signaling comprising a housing and a lighting module and / or signaling, characterized in that the module is in accordance with one of claims 15 and 16.
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    FR2974616B1|2011-04-29|2015-12-25|Valeo Illuminacion|SIGNALING DEVICE WITH "STOP" AND "POSITION" FUNCTIONS USING A LIGHT GUIDE AND GENERATING A 3D EFFECT|
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    TWI500982B|2013-10-09|2015-09-21|Avision Inc|Dual-slope light guide, light source module and optical assembly for scanner|US6414302B1|1998-08-11|2002-07-02|Interface Studies Inc|High photon energy range reflected light characterization of solids|
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    DE102016118603A1|2016-09-30|2018-04-05|Automotive Lighting Reutlingen Gmbh|Automotive lighting device with a light guide|
    CZ2017773A3|2017-12-01|2019-06-12|Varroc Lighting Systems, s.r.o.|Lighting, in particular a signal light for motor vehicles|
    FR3090075B1|2018-12-18|2021-06-11|Valeo Vision|LIGHT MODULE WITH STYLE MASK|
    JP2022022651A|2020-06-30|2022-02-07|市光工業株式会社|Light guides for vehicles and lighting fixtures for vehicles|
    法律状态:
    2016-02-29| PLFP| Fee payment|Year of fee payment: 2 |
    2016-08-12| PLSC| Search report ready|Effective date: 20160812 |
    2017-02-28| PLFP| Fee payment|Year of fee payment: 3 |
    2018-02-26| PLFP| Fee payment|Year of fee payment: 4 |
    2019-02-28| PLFP| Fee payment|Year of fee payment: 5 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 6 |
    2021-02-26| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550920|2015-02-05|
    FR1550920A|FR3032512B1|2015-02-05|2015-02-05|LIGHT GUIDE WITH MEANS OF COMPENSATING FOR PROGRESSIVE LOSS OF LIGHT ALONG THE GUIDE|FR1550920A| FR3032512B1|2015-02-05|2015-02-05|LIGHT GUIDE WITH MEANS OF COMPENSATING FOR PROGRESSIVE LOSS OF LIGHT ALONG THE GUIDE|
    PCT/EP2016/052560| WO2016124770A1|2015-02-05|2016-02-05|Lightguide with means to compensate for gradual losses of light along the guide|
    EP16706984.8A| EP3254018B1|2015-02-05|2016-02-05|Lightguide with means to compensate for gradual losses of light along the guide|
    MX2017010114A| MX2017010114A|2015-02-05|2016-02-05|Lightguide with means to compensate for gradual losses of light along the guide.|
    US15/548,894| US10557613B2|2015-02-05|2016-02-05|Light guide with means to compensate for gradual losses of light along the guide|
    JP2017541281A| JP6423105B2|2015-02-05|2016-02-05|Light guide with means to compensate for the gradual loss of light along the guide|
    CN201680008859.4A| CN107208866B|2015-02-05|2016-02-05|Light guide with means for compensating progressive losses of light along the guide|
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