![]() LIGHT-EMITTING LIGHT MODULE AND DEVICE FOR MOTOR VEHICLE
专利摘要:
Module for transmitting (1) at least one light beam along an optical axis (A) for a motor vehicle, said device comprising first (3) and second (4) light sources, first (5) and second (6) ) optical collectors adapted to collect the light emitted by said first and second light sources respectively and to redirect the collected light along convergent directions (D5, D6), said module being characterized in that: • at least one of the first and second light source is oriented, so as to emit light in a global direction of emission (D3, D4) deviating from the optical axis; and the collector associated with the at least one oriented light source has at least partially an asymmetrical configuration extending the collector along the optical axis (A). 公开号:FR3048065A1 申请号:FR1651459 申请日:2016-02-23 公开日:2017-08-25 发明作者:Simon Gousset-Rousseau 申请人:Valeo Vision SA; IPC主号:
专利说明:
Module and lighting device with reduced space requirement for a motor vehicle Background of the invention The present invention relates to a module and a device for emitting a light beam and to an associated projector. A preferred application of the invention relates to the automotive industry for the production of lighting devices, including vehicle headlamps. It is known modules emitting a light beam with a cutoff profile, especially for motor vehicles. It is in particular known modules comprising two optical collectors adapted to collect the light emitted by light sources and to redirect the collected light to a focal region where there is a cutoff element configured to generate the cutoff profile of the light beam to be projected by means of a lens. In the modules known to those skilled in the art, the associated light sources and collectors are oriented toward the cut-off element aligned along the optical axis of the device, as described in the patent document FR2934667. Such a configuration is disadvantageous in that it does not improve the compactness of the entire device. Indeed, the congestion of the collectors and the presence of the cut-off element between the two collectors limit the approximation of the optical sources, one with respect to the other. Beyond a certain approximation, the end of the collectors oriented towards the cutoff element collides with the cutoff element. This is particularly disadvantageous for the realization of low opening systems with the use of a thin lens in which the collimator must be brought as close as possible to the plane comprising the cut-off element. Several congestion constraints related to the collector also limit the possibility of making more compact lighting systems for existing motor vehicles. First, the collector must be of sufficient size to collect a maximum luminous flux from the light source. Secondly, the draw of the collector for redirecting the light to a focal region must be larger than the size of the surface of the light source to allow proper focusing in the focal region. Third, the inlet surface of the collector must be far enough away from the light source due to thermal stresses. Object and summary of the invention The present invention makes it possible to overcome the disadvantages of the devices known from the prior art by taking into account the constraints set out above, according to an ingenious approach that goes against conventional solutions and which consists in orienting at least one of the light sources. and the collector associated with this source, in a direction deviating from the optical axis of the device and in particular departing from the breaking element, rather than in a direction pointing towards this element. Given the singular orientation of the source and the associated collector, the latter is adapted such that it redirects the rays from the light source to a focal region. Thus, the present invention is directed to a module for emitting a light beam along an optical axis, in particular for a motor vehicle. This device comprises at least a first and at least a second light source as well as at least a first and at least a second optical collector adapted to collect the light emitted by said at least a first and at least a second light sources respectively and to redirect collected light in converging directions. Advantageously, the beam is a cut-off beam. According to the principle of the invention, at least one of said at least one first and said at least one second light source is oriented, so as to emit light in a global direction of emission deviating from the optical axis, the collector associated with said oriented light source or sources, has at least partially an asymmetrical configuration extending the collector along the optical axis. The invention thus makes it possible to bring the two light sources closer to one another, and consequently to reduce the size of the device in its vertical dimension (that is to say in one direction perpendicular to its optical axis). Other features, optional and non-limiting, are set out below, being noted that they can be implemented separately or in any combination between them. The global direction of emission of the light sources forms with the optical axis an emission angle of between 5 ° and 15 °. Said at least one first and at least one second collector are adapted to redirect the light over at least one focal region. Said at least one first and at least one second collector are adapted to redirect the light over the same focal region. - The collector and / or collectors comprise a collection portion oriented in the overall direction of emission of the associated light source, so as to collect and collimate the light from the light source. - The collector and / or collectors are adapted to collimate light rays from the light source in a direction forming a collimation angle ac non-zero with respect to the optical axis. Said at least one first and / or at least one second collector comprises an output surface forming a diopter, the surface being configured to focus the collimated light towards the focal region. - The output surface is inclined in a tilting direction forming with the optical axis of the collector an inclination angle as between 5 ° and 20 °. - The module further comprises a cutoff element, configured to give the beam a cutoff profile. - The cutting element is reflective. - The cutoff element is disposed along the optical axis between said at least a first and at least a second collector. Said at least one first light source and said at least one first collector are intended to provide a first cut-off beam for code-type lighting. Said at least one second light source and said at least one second collector are intended to complete the first beam so as to obtain a second beam for road-type lighting. At least one of said at least one first and at least one second light source comprises a light-emitting diode. The light sources and the collectors are arranged symmetrically with respect to the optical axis. The module comprises a plurality of first and second light sources and a plurality of first and second collectors respectively associated with the first and second light sources, and in which the first collectors are in continuity of material and / or the second collectors are in continuity with each other; matter, with each other, respectively. - The module further comprises a projection lens which may be configured to be common to the plurality of first and second collectors. Another aspect of the embodiments of the invention relates to a transmission device for a lighting system of a motor vehicle, the transmission device comprising at least one transmission module according to the invention according to the invention. one or more of the features described above. According to a feature of the invention, the device is a front projector of a motor vehicle. Another object of the invention is a motor vehicle equipped with at least one transmission device according to the invention, said device comprising at least transmission module, as described above. BRIEF DESCRIPTION OF THE DRAWINGS Other characteristics, details and advantages of the invention will emerge on reading the description given with reference to the appended drawing, given by way of example and which shows schematically in FIG. lighting for a motor vehicle according to a particular embodiment of the invention. The term "parallel" or the concept of axes includes here in particular with manufacturing tolerances or mounting: substantially parallel directions or substantially merged axes within this framework. Detailed description of an embodiment Figure 1 is a sectional representation of a lighting module or emission of at least one light beam for a motor vehicle according to a particular embodiment of the invention. In this representation, the section is made in a vertical plane (Ο, X, Z) of an orthonormal local coordinate system {O, X, Y, Z} where the axis OX indicates a horizontal direction, parallel to the optical axis A of the module, while the axis OZ designates a vertical direction perpendicular to the axis OX. The transmission module illustrated in FIG. 1 is intended to produce two light beams for the implementation of two distinct lighting modes: (i) a lighting having a cut-off profile to avoid dazzling the vehicles moving in the direction inverse (corresponding to a "codes" type of lighting mode), and (ii) lighting without a cut-off profile (corresponding to a "full-beam" or "high beam" type of lighting mode). The transmission module 1 comprises a first set consisting of a first light source 3 and a first optical collector 5, the first optical assembly being intended to provide a first light beam. The transmission module 1 further comprises a second set consisting of a second light source 4 and a second optical collector 6, the second optical assembly being intended to provide a second light beam. A convergent lens 10 is disposed along the optical axis A, so as to project the optical beams from the collectors and perform one of the two lighting modes provided according to the ignition of one or both light sources 3, 4. A cutoff element 8 is disposed between the first and second assemblies, along the optical axis A of the projector, to provide the desired cutoff profile. The cuts produced by the cut-off element 8 can have any orientation in the space. The cut-off profile preferably refers to the formation of an output beam that is not uniformly distributed around the optical axis due to the presence of a zone of least light exposure, this zone being substantially delimited by a cut-off profile. which can be formed by at least two, and in particular three line segments forming an angle between them or have a more complex shape in turns such as cuts known under the English word "kink". The resulting lighting is called "code lights". The cutoff element 8 is reflective. It is constituted, for example, by a metal plate called folder. In other words, the first light source 3 and the first collector 5 are intended to provide a first cut-off beam for code-type lighting, while the second light source 4 and the second collector 6 are intended to complete the first beam to obtain a second beam to achieve road lighting. In the present example, each light source 3, 4 consists of a light-emitting diode. However, in other embodiments, a plurality of transmitting elements may be combined to form any one of the first and second light sources so as to emit a higher optical power light output at the projector output. Each emission element may consist, for example, of a light-emitting diode or a laser diode. The first 5 and second 6 collectors are adapted to collect the light emitted by the first 3 and second 4 light sources respectively, collimate and redirect the collected light according to first DI and second directions D2 converging towards the optical axis A. For this, here, the first collector 5 comprises a collection portion 50, configured to collect the light from the first light source 3. Similarly, the second collector 6 comprises a collection portion 60, configured to collect light from the second light source 4. Each collector is adapted to guide the collected light and to collimate it in a direction of collimation forming with the optical axis A a collimation angle ac, whose absolute value is non-zero and preferably between 0 ° and 15 ° . In alternative embodiments, the value of this collimation angle can be adapted to each collector respectively, so that the collimation direction D5 of the first collector 5 and the collimation direction D6 of the second collector 6 respectively form a first collimation angle. O5 and a second collimation angle θς6 with the optical axis A. The light collected is guided inside the collector and collimated after reflection on the diopter formed by the side walls of the collector and the ambient air. Each of the first 5 and second 6 optical collectors may comprise a transparent material of refractive index greater than or equal to 1.41 having properties suitable for the propagation of light, such as PMMA (polymethyl methacrylate) or polycarbonate PPC (polypropylene carbonate). According to one particularity of the invention, the first 3 and second 4 light sources are oriented, so as to emit light according to first D3 and second D4 global directions of emission respectively. These directions deviate from the optical axis A in the direction of propagation of the light (towards the lens 10) and each form, with the optical axis A, an emission angle Oe3 and Oe4, respectively, the absolute value of which is preferably between 5 ° and 15 °. This particular orientation makes it possible to minimize the spacing H vertically separating the first 3 and second 4 light sources. This is particularly advantageous for reducing the vertical bulk of the module compared with conventional solutions of the prior art, where the sources are oriented to emit light towards the optical axis A. The first collector 5 associated with the first light source 3 is oriented substantially in the first overall direction of emission D3 forming a first emission angle (¾ with the optical axis A, so as to collect the maximum of light from the first light source 3. Similarly, the second collector 6 associated with the second light source 4 is oriented substantially along the second overall direction of emission D4 forming a second transmission angle cte4 with the optical axis A, so as to collect the maximum of light coming from the second light source 4. In the embodiment described here, the two associated light sources and collectors are oriented symmetrically with respect to the optical axis A, so that the first and second emission angles have the same value (ae3 = 0 ^ 4) which will be designated later by ο, this value being preferably between 5 ° and 15 °. However, in alternative embodiments, the two associated light sources and collectors may be oriented at angles ae 3 and O 4 of distinct values, the value of these angles being adjustable as a function of the optical properties and the geometrical configuration each collector. According to one particularity of the invention, the first 5 and second 6 collectors have, at least partially, an asymmetrical configuration lengthening the collector 5, 6 along the optical axis A. As illustrated by way of example in FIG. , each of the two collectors has asymmetric stretching in the direction of a focal region and more particularly of a focal point F of the lens, on the part of the collector closest to the optical axis, so as to focus the light towards the optical axis A, preferably on the focal point F. To better appreciate the asymmetrical nature of the shape of the collector, a shaded area representing a symmetrical shape has been superimposed on the first collector 5 in FIG. The asymmetrical shape of the collector is provided to redirect the light on the same focal point F located along the optical axis A, near one end of the cutoff element 8. The first and second collectors are adapted to redirect the light on this same focal point F, in particular as a function of the values of the emission angle θ 0 and the collimation angle θ. It will be noted that the higher the value of the collimation angle φ1, in an upper limit preferably fixed at 15 °, the stronger the asymmetry of the collimator, so as to redirect the light towards the focus F of the lens of projection 10. Such dissymmetry is accompanied by Fresnel losses by internal reflection on the diopter formed by the collimator and the air (ambient environment). These losses are all the higher as the dissymmetry is strong. Therefore, we will take care to optimize the degree of asymmetry of the collector, so as to limit the attenuation of the light beam from the collector. The choice of the value of the emission angle ae and the value of the collimation angle θ is a compromise between the following points. First, the emission angle and the collimation angle ac have values preferably comprised between 5 ° and 15 °, and between 0 ° and 15 ° respectively, so that the overall direction of emission and the collimation direction are neither parallel to the optical axis A nor directed towards the cut-off element 8 in the direction of propagation of light. In the case where these values are distinct, it will be noted that the higher the angle of emission has a value close to that of the collimation angle, the more the collection portions 50, 60 of the collectors have the effect of collecting the light. . In the limiting case where the emission angle α has a value equal to that of the collimation angle ac, the overall emission direction of the light source coincides with the collimator collimation direction associated with the light source. . The lower the value of the collimation angle, the more the direction of collimation tends to be parallel to the optical axis A. Therefore, less light will be collected by the collection area of the collector and the collector will be able to collide with the cutoff element 8. In a particular embodiment, given by way of illustration and not limitation, the light sources are inclined with respect to the optical axis A, so that the value of the overall emission angle of the light sources goose is equal to 5. °. The collectors are oriented and designed so that the value of the collimation angle is non-zero but close to 0 °, for example, equal to 1 °. Thus, each collector begins to fold the light by bringing the light rays closer to the optical axis, while avoiding the collimator to collide with the cut-off element 8. The asymmetric geometry of the collector is accordingly planned to complete the redirection of the light towards the focus F of the lens 10. Each of the first and second manifolds comprises an outlet surface 52 forming a diopter with the ambient air, said surface being configured to redirect the collimated light to the focal region and more particularly to focus it on the focal point F of the projection lens 10 The crossing of this diopter allows the collimated light to exit the collector in a generally focused manner. The geometry of the output surface 52 of the collector is determined according to the global emission directions of light sources, so as to fold the light rays from the collector to an edge of the folder 8 in the focal region and more particularly on the same focal point F. More specifically, the exit surface 52 is inclined in a direction pointing towards the optical axis A, in the propagation direction of the light, so that the exit angle α formed between the tangent to the exit surface and the perpendicular to the direction of collimation is: where nair denotes the refractive index of the air, n denotes the refractive index of the transparent material constituting the collimator, Dh denotes the height between the point of tangency at the exit surface and the plane comprising the breaking element and D denotes the distance between the point of tangency and the focal point F. The exit angle as is preferably between 5 ° and 20 °. A reduction in the bulk is advantageously obtained, since the value of the collimation angle is greater than 0 °. When the value of this angle exceeds 5 °, the losses of Fresnel generated by the inclination of the exit surface 52 necessary to fold the rays towards the focal region become predominant. In a particular embodiment (not shown), the module according to the invention comprises a plurality of first and second light sources respectively associated with first and second collectors and a single projection lens common to all of the first and second collectors. illuminating through the lens. Advantageously, the first and second collectors are in continuity of material on either side of the optical axis A, so as to form a single-block structure, on each side of the breaking element 8.
权利要求:
Claims (18) [1" id="c-fr-0001] claims 1. Module for transmitting (1) at least one light beam along an optical axis (A) for a motor vehicle, said device comprising at least a first (3) and at least a second (4) light source, from at least one first (5) and at least one second (6) optical collectors adapted to collect the light emitted by said at least one first and said at least one second light source respectively and to redirect the collected light along convergent directions (D5, D6), said module being characterized in that: • at least one of said at least one first and said at least one second light source is oriented, so as to emit light in a global direction of emission (D3 , D4) deviating from the optical axis (A); and the collector associated with the at least one oriented light source has at least partially an asymmetrical configuration extending the collector along the optical axis (A). [2" id="c-fr-0002] 2. Module according to claim 1, wherein said global transmission direction (D3, D4) forms with the optical axis (A) an emission angle (Oe3, Oe4; 0 ^) of between 5 ° and 15 °. . [3" id="c-fr-0003] 3. Module according to any one of claims 1 to 2, wherein said at least a first and at least a second collectors are adapted to redirect the light on at least one focal region. [4" id="c-fr-0004] 4. Module according to any one of claims 1 to 3, wherein said at least a first and at least a second collectors are adapted to redirect the light on the same focal region. [5" id="c-fr-0005] 5. Module according to any one of claims 1 to 4, wherein the and / or collectors comprise a collection portion (50, 60) oriented in the overall direction of transmission (D3, D4) of the associated light source. , so as to collect and collimate the light from said light source. [6" id="c-fr-0006] 6. Module according to claim 5, wherein the and / or the collectors (5, 6) are adapted to collimate light rays from said source (3, 4) in a direction (D5, D6) forming a collimation angle (α ^, α ^; Oc) non-zero with respect to the optical axis (A). [7" id="c-fr-0007] Module according to any one of claims 4 to 6, wherein said at least one first and / or at least one second collector comprises an exit surface (52) forming a diopter, said surface being configured to focus the collimated light towards said focal region. [8" id="c-fr-0008] 8. Module according to claim 7, wherein said outlet surface (52) is inclined in a direction of inclination forming with the optical axis of the manifold an inclination angle (as) between 5 ° and 20 °. [9" id="c-fr-0009] 9. Module according to any one of claims 1 to 8, further comprising a cutoff element (8), configured to give the beam a cutoff profile. [10" id="c-fr-0010] 10. Module according to claim 9, wherein said cut-off element (8) is reflective. [11" id="c-fr-0011] Module according to any one of claims 9 and 10, wherein said cut-off element (8) is disposed along the optical axis (A) between said at least one first (5) and at least one second (5). 6) collectors. [12" id="c-fr-0012] Module according to any one of claims 9 to 11, in which: said at least one first light source (3) and said at least one first collector (5) are intended to provide a first cut-off beam for illumination. of type code, and • said at least one second light source (4) and said at least one second collector (6) are intended to complete the first beam so as to obtain a second beam for road lighting. [13" id="c-fr-0013] 13. Module according to any one of claims 1 to 12, wherein at least one s said at least a first (3) and at least a second (4) light sources comprises a light emitting diode. [14" id="c-fr-0014] 14. Module according to any one of claims 1 to 12, wherein said light sources (3, 4) and said collectors (5, 6) are arranged symmetrically with respect to the optical axis (A). [15" id="c-fr-0015] 15. Transmission module according to any one of claims 1 to 14, comprising a plurality of first and second light sources and a plurality of first and second collectors respectively associated with the first and second light sources, and wherein the first collectors are in continuity of material and / or the second collectors are in continuity of material, with each other, respectively. [16" id="c-fr-0016] The transmitting module according to claim 15, further comprising a projection lens (10) common to said plurality of first and second collectors. [17" id="c-fr-0017] 17. Transmission device comprising at least one transmission module according to any one of claims 1 to 16. [18" id="c-fr-0018] 18. Transmission device according to claim 18, characterized in that said device is a front projector of a motor vehicle.
类似技术:
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同族专利:
公开号 | 公开日 EP3211294B1|2021-11-10| US10161587B2|2018-12-25| CN107101153B|2021-03-05| CN107101153A|2017-08-29| EP3211294A1|2017-08-30| FR3048065B1|2019-11-29| US20170241608A1|2017-08-24|
引用文献:
公开号 | 申请日 | 公开日 | 申请人 | 专利标题 DE102007052696A1|2007-01-11|2008-07-17|Zizala Lichtsysteme Gmbh|Total reflection lens system for a headlamp or light unit of a motor vehicle injects light from a total reflecting lens element into a lens element partially via a limiting surface of the lens element | WO2011154470A1|2010-06-09|2011-12-15|Automotive Lighting Reutlingen Gmbh|Attachment optical unit composed of transparent material for concentrating light, lens array comprising at least one such attachment optical unit and light module comprising such a lens array| DE102011013211A1|2011-03-05|2012-09-06|Automotive Lighting Reutlingen Gmbh|Motor vehicle headlight with a multi-function projection module| DE102014205994A1|2014-03-31|2015-10-01|Automotive Lighting Reutlingen Gmbh|Light module with semiconductor light source and attachment optics and motor vehicle headlights with such a light module| US5813743A|1995-03-27|1998-09-29|Fuji Photo Film Co., Ltd.|Lighting unit| DE102008036192B4|2008-08-02|2012-05-03|Automotive Lighting Reutlingen Gmbh|Automotive lighting device| US20100135036A1|2008-12-02|2010-06-03|Harison Toshiba Lighting Corp.|Vehicle lighting device| AT512246B1|2011-11-22|2014-02-15|Zizala Lichtsysteme Gmbh|LED PROJECTION MODULE AND HEADLIGHTS WITH MODULE| AT512591B1|2012-03-12|2014-06-15|Zizala Lichtsysteme Gmbh|Vehicle headlight with laser light source| JP5955110B2|2012-06-05|2016-07-20|株式会社小糸製作所|Vehicle lighting| DE102013207850A1|2013-04-29|2014-10-30|Automotive Lighting Reutlingen Gmbh|Light module for a motor vehicle headlight|US10851959B2|2017-11-22|2020-12-01|Stanley Electric Co., Ltd.|Vehicle headlight| US10632907B2|2018-09-10|2020-04-28|Ford Global Technologies Llc|Vehicle lamp assembly for the passenger compartment having a first and second optic for functional lighting| EP3657067B1|2018-11-23|2021-08-18|Valeo Iluminacion, S.A.|Automotive lighting device and method for manufacturing an automotive lighting device|
法律状态:
2017-02-28| PLFP| Fee payment|Year of fee payment: 2 | 2017-08-25| PLSC| Publication of the preliminary search report|Effective date: 20170825 | 2018-02-26| PLFP| Fee payment|Year of fee payment: 3 | 2019-02-28| PLFP| Fee payment|Year of fee payment: 4 | 2020-02-28| PLFP| Fee payment|Year of fee payment: 5 | 2021-02-26| PLFP| Fee payment|Year of fee payment: 6 |
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申请号 | 申请日 | 专利标题 FR1651459A|FR3048065B1|2016-02-23|2016-02-23|LIGHT-EMITTING LIGHT MODULE AND DEVICE FOR MOTOR VEHICLE| FR1651459|2016-02-23|FR1651459A| FR3048065B1|2016-02-23|2016-02-23|LIGHT-EMITTING LIGHT MODULE AND DEVICE FOR MOTOR VEHICLE| EP17157076.5A| EP3211294B1|2016-02-23|2017-02-21|Lighting device and module with reduced footprint for motor vehicle| CN201710098243.7A| CN107101153B|2016-02-23|2017-02-22|Lighting module and device for a motor vehicle with reduced dimensions| US15/439,196| US10161587B2|2016-02-23|2017-02-22|Lighting module and device with reduced size for automobile vehicles| 相关专利
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