• 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:
    A light emission module, especially for a motor vehicle. The module comprises: - a substrate (14) comprising a main portion (20) curve extending in a longitudinal direction (D), - a plurality of electroluminescent elements (16) arranged on the substrate and configured to emit light rays when powered with electrical power, the electroluminescent elements being distributed along said longitudinal direction, and - a control assembly (34) adapted to regulate the electrical energy supplied to the electroluminescent elements, the control assembly having a mode of operation wherein the control assembly is configured for supplying the electroluminescent elements (16) with respective energies and / or electric powers determined at least as a function of respective principal light emission directions (dp1, ..., dp6) of the electroluminescent elements for obtaining at least two maximum light intensities emitted by the elements in the corresponding main direction of emission which are different along said longitudinal direction (D) of the substrate.
    公开号:FR3056705A1
    申请号:FR1659231
    申请日:2016-09-28
    公开日:2018-03-30
    发明作者:Patrice Collot；Vincent Godbillon；Franck MILLON；Jean-Didier KINFACK；Lothar Seif；Arnaud ABALA；Lingxuan ZHU；Natacha AUDY
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    The field of the invention relates to light emission devices for a motor vehicle, and in particular to lighting and / or signaling devices.
    In known manner, a large number of these devices comprise a light emission module provided with a plurality of electroluminescent elements forming the light emission heart of the device.
    In certain applications, in particular for signaling devices, the devices have a curved profile, that is to say a curve, so as to follow the shape of the bodywork at the level of which they are received.
    This geometric configuration results in numerous constraints on the design of the devices.
    Indeed, in addition to considerations of homogeneity of the light rendering obtained which must result in a difficulty or even an impossibility for the observer to distinguish the electroluminescent elements in a unitary manner within it, this type of device is subject to regulations which impose in particular to the device for presenting a spatial distribution of given light intensity, within which for at least certain directions, the light intensity emitted by the device has a value greater than a predetermined minimum value and / or less than a predetermined maximum value .
    However, obtaining a device that is both curved and having this property is not easy.
    A solution commonly used to achieve this result consists in having a substrate receiving the electroluminescent elements in the form of a plurality of flat plates which are disjoint from each other and oriented substantially orthogonally to the preferred emission direction envisaged.
    This solution itself has drawbacks, in particular in terms of compactness and complexity. Indeed, due to the curve of the device, these plates must have a relative staircase arrangement, which results in a large occupied volume and by the presence of numerous connection and fixing elements for the plates within the device, in addition to possible phenomena of masking of the electroluminescent elements by the neighboring substrates.
    In practice, this makes this solution difficult to apply in certain cases, or even unusable.
    Also, the invention aims to propose a light emission module and a light emission device which does not have these drawbacks.
    To this end, the invention relates to a light emission module, in particular for a motor vehicle, comprising:
    - a substrate comprising a curved main portion extending in a longitudinal direction,
    - a plurality of electroluminescent elements arranged on the substrate and configured to emit light rays when supplied with electrical energy, and
    a control assembly adapted to regulate the electrical energy supplied to the electroluminescent elements, the control assembly having an operating mode in which the control assembly is configured for the supply to the electroluminescent elements of electrical energy and / or powers respective ones determined at least as a function of respective main directions of light emission of the light-emitting elements for obtaining at least two maximum light intensities emitted by the light-emitting elements in the corresponding main direction of emission which are different along said direction longitudinal of the substrate.
    According to one aspect of the invention, in said operating mode, the control assembly is configured to regulate the intensity of the electric current supplied to the electroluminescent elements for obtaining said different maximum light intensities.
    According to one aspect of the invention, the substrate further comprises a plurality of tabs extending from the main portion, the tabs being distributed along the longitudinal direction.
    According to one aspect of the invention, the tongues are substantially planar.
    According to one aspect of the invention, the electroluminescent elements are arranged on the tongues, the electroluminescent elements arranged on a given tab forming a group of electroluminescent elements.
    According to one aspect of the invention, in the operating mode, the control assembly is configured to regulate the electrical energy supplied to the electroluminescent elements to obtain maximum light intensities provided by the substantially identical electroluminescent elements within d 'a given group.
    According to one aspect of the invention, at least two electroluminescent elements have different operating characteristics so that the maximum light intensities respectively emitted by said two electroluminescent elements are different at a given electric power supplied, the electric energy supplied to a light emitting element given also being determined from the operating characteristics of said electroluminescent element.
    According to one aspect of the invention, in said operating mode, for at least part of the length of the substrate along said longitudinal axis, the control assembly is configured to regulate the energy and / or the electric power supplied to the elements electroluminescent so that the respective light intensities of the electroluminescent elements go increasing in a given direction of travel of said part of the length of the substrate.
    According to one aspect of the invention, the control assembly comprises a plurality of control modules respectively associated with at least one electroluminescent element and respectively configured to regulate the energy and / or the electric power supplied to the associated electroluminescent element or elements.
    According to one aspect of the invention, the control modules are arranged in contact with the substrate and are distributed along the substrate.
    According to one aspect of the invention, for at least part of the electroluminescent elements, each electroluminescent element of said part has a main direction of light emission angularly offset from a normal to the substrate at a zone of said substrate receiving the electroluminescent element considered.
    According to one aspect of the invention, all or part of the light-emitting elements of said part has a main direction of light emission substantially parallel to a local plane tangential to the substrate at the level of said zone receiving the light-emitting element in question.
    According to one aspect of the invention, the light emission module further comprises a diffusion screen arranged facing the electroluminescent elements and intended to form a surface illuminated from the light rays emitted by the electroluminescent elements.
    According to one aspect of the invention, the diffusion screen, the substrate and the electroluminescent elements are configured so that said illuminated surface is substantially homogeneous.
    The invention further relates to a lighting and / or signaling device for a motor vehicle, comprising a light emission module as defined above.
    According to one aspect of the invention, the vehicle extends along an axis, the control assembly being configured to, in said operating mode, regulate the energy and / or the electric power supplied to said electroluminescent elements so that the lighting and / or signaling device has a spatial distribution of light intensity having, for a plurality of directions, a light intensity emitted in each of said directions having a value greater than a predetermined minimum value and / or a value less than a value predetermined maximum.
    According to one aspect of the invention, the vehicle extending along an axis, the control assembly being configured to, in said operating mode, regulate the energy and / or the electric power supplied to said electroluminescent elements so that the the maximum light intensity respectively emitted by all or part of the light-emitting elements is greater the smaller the angle formed between the main direction of emission of the light-emitting element considered and the axis of the vehicle.
    The invention will be better understood on reading the detailed description which follows, given solely by way of example and made with reference to the appended Figures, in which:
    Figures la and lb are schematic illustrations of a light emitting device according to the invention;
    Figure 2 illustrates a front view of part of a light emission module of the device of Figure 1;
    Figure 3 illustrates a top view of part of the light emission module according to the invention; and
    Figure 4 illustrates a diffusion screen of a light emission module according to the invention.
    Figures la and lb illustrate a light emission device 2 according to the invention, hereinafter device 2.
    The device 2 is configured to emit light.
    In the context of the invention, the device 2 is advantageously intended to be integrated into a motor vehicle. In other words, it is a light emitting device for a motor vehicle.
    Advantageously, the device 2 is a lighting and / or signaling device for a motor vehicle.
    It is for example configured to implement one or more photometric functions.
    A photometric function is for example a lighting and / or signaling function visible to a human eye. It is noted that these photometric functions can be the subject of one or more regulations establishing requirements for colorimetry, intensity, spatial distribution according to a so-called photometric grid, or even ranges of visibility of the light emitted.
    The device 2 is for example a lighting device and then constitutes a vehicle headlight - or headlight - intended to be arranged at the front of the vehicle. It is then configured to implement one or more photometric functions, for example chosen from a low beam function called "code function", a high beam function called "road function", an anti-fog function.
    Alternatively or in parallel, the device is a signaling device intended to be arranged at the front or at the rear of the vehicle.
    When it is intended to be arranged at the front, the photometric functions that it is configured to implement (possibly in addition to that (s) that it implements as a lighting device) include a direction change indication function, a daytime running light function known by the acronym DRL, for "Daytime Running Light", a position light function, a front light signature function, a so-called "Side function -Marker ", which can be translated by side signaling.
    When it is intended to be arranged at the rear, these photometric functions include a reversing indication function, a stop function, a fog function, a direction change indication function, a rear light signature function, a lantern function, a “Side-Marker” function.
    Alternatively, the device 2 is provided for lighting the passenger compartment of a vehicle and is then intended to emit light mainly in the passenger compartment of the vehicle.
    In what follows, the device 2 is described without limitation in a configuration in which it is intended to emit light outside the vehicle and is a rear signaling device.
    Referring to Figures la and lb, the device 2 comprises a housing 4 and a closing glass 6 cooperating with each other to internally delimit a cavity 8. The device 2 also comprises a light emission module 10 according to the invention, hereinafter module 10.
    In the context of the invention, the device 2 is curved, or curved. In other words, seen from above, at least the glass 6 is curved, here to match the shape of the vehicle body at the region to which the device 2 is intended to be arranged. The leftmost portion of the device in Figure lb is for example intended to be arranged on the outside of the vehicle, the right part being inversely oriented towards a median plane of the vehicle.
    Fe module 10 is arranged in whole or in part in the cavity 8. In certain embodiments, the device 2 optionally includes a receiving housing for receiving the module 10. This housing is for example arranged in the housing 4. This housing is advantageously closed . It is for example defined by an envelope forming a rear portion of this housing, and by a diffusion screen described below or an element on which the diffusion screen is formed, which cooperates with said envelope. Fes internal walls of this housing other than the screen are for example reflective and / or diffusing for the light emitted by the module 10 which reaches them (the screen being diffusing but not reflective, as described below).
    The module 10 is configured to emit light. Advantageously, as in the example of Figures 1a and 1b, it is arranged to emit light in the direction of the closing glass (which is transparent for at least part of this light emitted by the module 10).
    In the context of the invention, the device 2 is configured to present a spatial distribution of light intensity having, for at least a plurality of given directions, minimum and / or maximum values. In other words, in these directions, the light intensity emitted by the device 2 must be greater and / or less than a predetermined threshold value (this or these values are for example defined for each direction considered). The threshold values are for example defined by one or more regulations. Such a direction P is illustrated in FIG. 1b, and is for example a horizontal direction (in the sense of the orientation of the device 2 within the vehicle) parallel to an axis of movement X (horizontal) of the vehicle along which the vehicle s range and according to which the light intensity emitted by the device 2 must be greater than a given threshold value. This direction P can be seen as a preferred emission direction (among a plurality).
    These considerations of intensity distribution translate into strong constraints on the module 10 in terms of light intensity emitted as a function of the direction considered.
    With reference to FIGS. 1a, 1b and 2, the module 10 comprises a substrate 14, electroluminescent elements 16 and a screen 18.
    The substrate 14 forms a support for the electroluminescent elements 16.
    In addition, it is configured to convey electrical energy to the electroluminescent elements 16 for the generation of light rays by them. To this end, it comprises means for conveying electrical energy configured for the connection of the elements 16 to a source of electrical energy. These means include, for example, metal or metallized connection elements, such as copper tracks or wires.
    Note that Figure 2 illustrates two substrates 14 arranged in contact with each other. They can be seen as belonging to separate modules 10 that comprises the device 2. In this configuration, the respective screens 18 of the modules 10 are for example formed on the same part. As also illustrated in this Figure, the substrate 14 is arranged substantially horizontally relative to the orientation of the vehicle (upper substrate), or is inclined relative to the horizontal (lower substrate).
    The substrate 14 has a general polygonal shape, such as rectangular. It extends along a longitudinal direction, or path D. This direction or path can be curved, for example to account for a curve of the substrate and / or to take into account the geometric configuration of the substrate, the shape of which is optionally curved, for example bent (as illustrated for the lower substrate in Figure 2). This curvature is for example the result of a bending of the substrate (or a portion of the substrate).
    The substrate 14 has a contour C having edges whether rectilinear or not.
    The substrate 14 comprises a main portion 20 and tabs 22.
    The main portion 20 is delimited externally by the contour C and gives the substrate 14 its general appearance. It is in the general form of a polygonal plate, such as rectangular, the thickness of which is small relative to its other dimensions. Its angles are optionally rounded.
    The portion 20 is formed by the entirety of the substrate with the exception of the tabs 22 described below.
    Advantageously, the main portion 20 is flexible. More specifically, it is adapted to deform elastically, in particular under the effect of a bending force, such as a bending tending to bring its longitudinal ends closer to one another and applied normally to one face of the substrate. .
    This allows in particular the main portion and the substrate to be curved, in particular to be arranged substantially parallel to the closing glass 6 and / or to the rear wall of the housing 4 when the device 2 is curved. In other words, the main portion advantageously has a curve, for example identical to that of the closing glass and / or that of the screen 18 over all or part of its length.
    The tongues 22 are in the form of languages of matter. They extend from the main portion. More specifically, they each extend from an internal edge of the main portion. In other words, they do not extend from an outer edge of the substrate 14, that is to say from the edge turned towards the outside of the substrate 14.
    These tongues are for example formed by cutting the substrate, which initially has a solid surface.
    The tongues 22 are connected to the main portion 20 by an edge 22B of connection (dotted on certain tongues of Ligure 2), and their other edges are free, that is to say disjoint from the substrate 14. The edge of connection 22B for example came out of the box with the main portion.
    Advantageously, the tongues have a generally polygonal shape, such as rectangular, all or part of the angles of which are optionally rounded. The connection edge 22B corresponds to at least one side of this polygon, the other sides forming free edges.
    Advantageously, they have substantially identical dimensions, at least for part of them. It is noted that for reasons of bulk or shape of the substrate, the end tongues may have to have dimensions or even a shape different from those of the tongues which are not proximal relative to the ends of the substrate.
    The tongues 22 are substantially flat. In addition, advantageously, they are arranged to remain substantially flat in the event of elastic bending of the main portion.
    Figure 3 illustrates the geometric configuration of the tabs in such a bent configuration. In this configuration, the tongues extend substantially in a plane tangent locally to the main portion.
    The tongues are advantageously made from the same material as the rest of the substrate 14. Their flatness, in particular in the flexed configuration of the main portion, has the effect of limiting the transmissions of bending forces printed on the main portion to the components arranged on the tongues and / or the welds making said components integral with the surface of said tongues ,.
    The substrate 14 comprises for example a plurality of tabs 22 arranged consecutively along the substrate. They are for example thus arranged in an aligned manner along a longitudinal direction of the substrate.
    They have for example the same spatial orientation. For example, as illustrated in FIG. 2, their connection edge 22B forms a longitudinal end of the proximal tongues relative to the same end of the substrate, the opposite edge being turned towards the tongue 22 coming next in the direction of travel of the substrate from this end. towards the other end.
    Preferably, the connection edge 22B of the tongues is substantially parallel to the local axis of curvature of the substrate. In this way, the tongues are only slightly if not mechanically constrained by the bending force of the substrate 14.
    It is noted that the substrate may comprise a line of tongues as illustrated in FIG. 2, or else a plurality of lines of tongues extending parallel to one another and offset from each other transversely to this longitudinal direction.
    The substrate is for example made from a composite of reinforced epoxy resin, typically with glass fibers. For example, it is made from a material commonly called PCB FR4 (PCB being the English acronym for Printed Circuit Board, which means printed circuit).
    It advantageously has a thickness of between 0.3 mm and 1.6 mm. This configuration, combined with the presence of openings (the outline of the tongues) made in the surface of the substrate, makes it possible to promote the flexibility of the substrate and makes it possible to dispense with expensive materials commonly used to form flexible substrates.
    As described below, the electroluminescent elements 16 are arranged on a given face 24 of the substrate. Advantageously, this face 24 is adapted to reflect at least part of the light coming from the elements 16 and reaching them.
    For example, for this purpose, this face is white.
    Advantageously or in parallel, this face 24 is further configured to diffuse at least part of the light coming from the elements 16 and reaching it.
    For example, for this purpose, it has adapted asperities.
    The electroluminescent elements 16 are each configured to emit light when supplied with electrical energy appropriately. These elements 16 form the light-emitting core of the module 10.
    Advantageously, these elements 16 are semiconductor electroluminescent elements adapted to generate photons by electroluminescence. Advantageously, each element 16 of at least a part of the elements 16 that comprises the module 10 is formed from a light-emitting diode. For example, all of them are. Here we mean "formed from" that the light emitting structure that element 16 includes is a light emitting diode, sometimes called an LED chip.
    Advantageously, in certain embodiments, at least a part of the light-emitting elements 16 comprises a diode and a housing 26 in which the corresponding diode is arranged. Boxes 26 are sometimes called "packages", which comes from English and can be translated as box.
    The arrangement of the diode within the housing is chosen to obtain a main direction of emission of the corresponding diode which is chosen at given orientation of the associated housing 26. This main direction corresponds to the direction in which the element 16 considered emits a maximum light intensity.
    The electroluminescent elements 16 are arranged on the substrate. As indicated above, they are arranged on the same face 24 of the substrate. This face 24 faces the screen 18 and the closing glass 6.
    To this end, the boxes 26 are fixed on the face 24.
    In the context of the invention, the electroluminescent elements are advantageously arranged on the tongues 22 of the substrate. For example, they are arranged thereon at the rate of two or more than two per tab, for example at the rate of 4, 6, 8, 10 or more per tab. The elements 16 arranged on a given tab form a group of electroluminescent elements.
    The elements 16 are advantageously arranged in one or more lines on the substrate. These lines are advantageously each parallel to the longitudinal direction D of the substrate (which can be curved depending on the configuration of the substrate 14 considered).
    In the example of the Figures, the elements 16 are thus arranged in two parallel lines.
    Advantageously, the distance separating two consecutive elements 16 along the substrate is substantially constant.
    Advantageously, for at least part of the elements 16, each element 16 is associated with at least one element 16 being located at substantially the same long location on the substrate. In other words, the corresponding electroluminescent elements are also arranged in columns each comprising at least two elements 16.
    Advantageously, for at least part of the elements 16, the elements 16 are configured to present a main direction of emission angularly offset from the direction normal to the substrate at the area of the substrate carrying the element 16 considered. In other words, this direction does not correspond to the local normal to the substrate.
    For example, the elements 16 are configured to emit light in a preferred main direction understood angularly between a plane parallel to a local plane tangential to the corresponding substrate area and the local normal to the substrate.
    Advantageously, the corresponding elements 16 are configured to emit light in a preferred direction lying in a plane substantially parallel to the local plane tangential to the zone of the corresponding substrate. In other words, as illustrated in Figure 3, the electroluminescent elements are configured so that this direction is parallel to the tongue 22 on which they are located.
    The corresponding elements 16 are for example light-emitting diodes known under the English name of "Side-LED", which can be translated by "Side LED".
    In practice, the desired main direction is obtained by arranging the diode within the corresponding housing 26 in an appropriate manner.
    It is noted that these configurations can be combined, the module 10 comprising elements 16 parallel to the local tangential plane to the substrate considered and / or others emitting angularly between the plane parallel to the local tangential plane and the normal to the zone considered.
    It is further noted that, alternatively or parallel to the presence of the electroluminescent elements having a main direction of emission as above, the module 10 can include electroluminescent elements whose main direction corresponds substantially to the local normal to the substrate.
    In Figure 3, the main directions oriented parallel to the tangential local plane have the references dp3 to dp6 and the associated local normals are of references neither oc3 to nor oc6 . The main directions having a configuration simply inclined with respect to the corresponding normal other are referenced dpi and dp2 (the associated local normals are of reference neither oc i and ni oc2 ).
    In certain embodiments, the module 10 only comprises elements 16 having a main direction parallel to the local tangential plane.
    The module 10 is for example configured to emit white, or even red or amber light. Other colors are possible depending on the intended application.
    It is noted that the module 10 can include elements 16 configured to emit light of white color, others of amber color and / or others of red color.
    The elements 16 each have operating properties which define, for a given electrical energy or electrical power received, the light intensity and the color that they provide.
    In practice, in known manner, these operating properties cannot be finely controlled during the manufacture of the electroluminescent elements, so that diodes having the same product reference, for example a supplier reference, may however have at least light intensities data substantially different from each other at a given electrical power.
    This aspect is at the origin of the process known as of “binning” (which comes from English and can be translated by final sorting), which is a sorting of the elements produced according to their operating properties in different categories, or “ bins ”, within which the elements have similar operating properties. It is thus possible to obtain elements 16 having similar, or even substantially identical, operating properties.
    In the context of the invention, advantageously, at least a part of the elements 16 has distinct operating properties at given electrical energy or electrical power. This minimizes the cost of the device 2, the use of only elements belonging to a given bin being more expensive.
    The screen 18 is configured to present a surface illuminated from the light emitted by the elements 16. In addition, it is configured to diffuse at least part of the light received from and passing through the photoemissive elements.
    Preferably, together with the substrate 14 and the photoemissive elements, the screen is configured to present a substantially homogeneous illuminated surface. By homogeneous, it is meant that the photoemissive elements cannot be distinguished with the naked eye within this surface lit by an observer whose gaze is directed towards the screen.
    In practice, this property results - all other things being equal - from the combination of the density of distribution of the light-emitting elements on the substrate and the distance between the substrate and the screen.
    Advantageously, for this purpose, for at least some of the photoemissive elements and advantageously for all, the distance between two adjacent photoemissive elements is less than or equal to the distance which separates them from the screen, and advantageously less than 70% of the latter. .
    Note that homogeneity can be quantified.
    For example, by denoting it H, it can be determined from or as a minimum between on the one hand a local uniformity L U and a global uniformity G U.
    The overall uniformity is for example determined from the relationship:
    GU = 100 * (1 Avg (L ROI ) where ROI denotes the illuminated surface presented by the screen and U RO i denotes the luminance of the illuminated surface (σ denotes the standard deviation and Avg the average).
    Local uniformity is for example determined as follows. Consider a pixel X of the illuminated surface, the square region of side n (for example n pixels) centered on X, as well as 8 adjacent square regions of side n, these regions being respectively centered on pixels X, each located at a distance n from the point X. The points Xi are for example regularly distributed around X.
    We define the local contrast l_c as a function of n according to the relation
    Z_c (n) = max vxeR0I (max i = 1 ..... 8 ° ù M and Mi are the average luminances of the pixels of the region centered on X, on the Xi considered respectively.
    The magnitude MSlocal contrast is determined as the maximum of the local contrasts l_c (n) for n = 2p + l, with p ranging from 1 to 20, and the magnitude L_U is determined according to the relation L_U = 100 (12MSlocal_contrast).
    It is noted that in certain embodiments in which the device 2 comprises two relatively distinct zones, the overall homogeneity is for example determined as a minimum of the respective homogeneities of the two regions.
    Furthermore, it can be determined as a linear combination (or alternatively, as a minimum) of the homogeneity considered along various axes.
    Also, within the framework of the invention, the homogeneity H is advantageously greater than 85%.
    Note that the screen 18 is at least partially transparent in the light of the elements 16.
    Several configurations are envisaged to obtain the diffusing effect of the screen 18.
    In a first configuration, the screen 18 is said to broadcast "in the mass". In other words, it is made from a diffusing material. This type of material is sometimes called opalescent.
    Alternatively, the screen has a surface provided with microstructures 28 provided for diffusing the light from the photoemissive elements. They are advantageously provided for diffusing light by transmission diffraction.
    These microstructures 28 are for example formed in the surface of the external face of the screen, that is to say of the face facing the closing glass. They are present on the entire surface of the screen (they are illustrated on only part of the screen 18 in Figure 4 for clarity).
    Advantageously, the microstructures 28 are obtained by injection.
    These microstructures are, for example, in the form of depressions or protrusions formed in the surface of the face of the screen. They have characteristic dimensions of an order of magnitude between that of the wavelength of the light emitted by the elements 16 and 100 times the latter.
    Screen 18 has a general polygonal shape, such as rectangular. It has for example a strip shape. Its angles are optionally rounded.
    The screen is arranged opposite the face of the substrate 14 carrying the photoemissive elements 16. It is located away from this face and the photoemissive elements.
    The screen is located at a distance from the substrate, for example between 20 mm and 90 mm.
    Advantageously, the screen 18 is curved. Preferably, it has a curve identical to that of the substrate over at least part of its length. In other words, the screen, or more specifically its face carrying the microstructures, is arranged in a manner substantially parallel to at least part of the main portion of the substrate (that is to say of the large face of the latter turned towards the screen). In this way, for at least some of the elements 16, all the photoemissive elements considered are all substantially the same distance from the screen 18.
    It is noted that optionally, as illustrated in FIG. 4, the screen 18 is carried by an element 30 belonging to the module 10. Besides the screen 18, this element 30 comprises a fixing portion 32 surrounding the screen on at least one part of its periphery. This portion 32 is provided for fixing the element 30 within the volume 8, and optionally within the housing 12, as well as for gripping the element 30.
    Note that the element 30 may include several screens, as illustrated in Figure 4. In this Figure, it comprises a first substantially horizontal screen and a second screen 18 2 of angled shape extending from the first in an inclined manner relative to horizontally.
    In the context of the invention, in addition to the elements described above, the module 10 also comprises a control assembly 34 for controlling the electroluminescent elements 16.
    The control assembly 34 is configured to regulate the electric energy and / or the electric power supplied to the elements 16 to turn them on and off and to control the light intensity emitted by each of them.
    The control assembly 34 advantageously comprises a plurality of control modules 36 distributed along the substrate. Each module is coupled to a plurality of elements 16 for controlling them.
    For example, a given control module is associated with the elements 16 arranged on a given tongue. The control module is located, for example, on the tongue itself, for example on the face opposite to the face 24, or near the tongue on the main portion 20.
    These modules include for example a programmable microcontroller, such as an integrated circuit of the ASIC type, for "application-specific integrated circuit", which means integrated circuit specific to an application, or an integrated regulator, or a regulator produced by means of components. discreet ..
    According to the invention, the control assembly 34 has an operating mode in which it is configured to control the supply to the electroluminescent elements of respective electrical energies (or powers) determined at least as a function of the main direction of emission of the electroluminescent elements for obtaining at least two maximum light intensities emitted by the electroluminescent elements in the corresponding main direction which are different.
    Here, it is understood that this operating mode constitutes a true intentional operating mode of the device and which can be maintained over time, and not simply a transient state of the device, for example when it is started up.
    In addition, in this operating mode, the elements 16 considered are kept on. This operating mode can advantageously be selectively activated and deactivated.
    To this end, advantageously, the control assembly 34 is configured to implement this functionality by controlling the intensity of the electric current supplied to the elements 16. In other words, these different light intensities result at least from the regulation of the current supplied to the elements 16 by the set 34.
    Advantageously, in this operating mode, for at least part of the elements 16, the control assembly 34 is configured for the supply to the elements 16 considered of respective electrical powers resulting in a maximum light intensity emitted all the more important as the angular difference between the main direction of emission of the module considered and the X axis of the vehicle is small. In other words, the closer the emission direction of an element 16 among those considered, to the X axis, the higher the maximum light intensity at which its emission is controlled by the assembly 34. This makes it easier to obtain an intensity distribution that complies with regulatory requirements in configurations where it would be impossible if all the sources were controlled so as to all present the same light intensity.
    In an embodiment such as that of the Figures, for at least a portion of the length of the substrate, this results in a maximum light intensity of the elements 16 going increasing along the longitudinal direction D traversed from one end of said portion to the other .
    In general, advantageously, in certain embodiments, the control assembly 34 is configured to control the elements 16 so that the light intensity emitted by them is increasing from one element to the consecutive element and / or at least from one tab to another, in a direction of travel of the substrate on at least a portion of the substrate. Preferably, the light intensity levels provided by the elements 16 are defined so that the difference between two consecutive light intensities is small enough to be indistinguishable to the human eye. This allows to act on the distribution of light intensities without prejudice to the uniformity of the system.
    It is noted that the electrical power determined for a given element 16 is determined as a function of its operating properties, which in particular condition the light intensity of the element 16 at given electrical power. Therefore, the exact configuration of the assembly 34 for obtaining the first mode of operation is highly variable depending on the population of elements 16 that the system comprises.
    Also, for two elements 16 having similar operating properties, for example two elements having identical product references and belonging to the same category or “bin”, obtaining distinct maximum light intensities is implemented by supplying the elements of respective respective electrical intensities. Conversely, this only difference in intensity of the electric current can lead to identical maximum intensities for elements 16 with different operating properties.
    Advantageously, in certain embodiments, in the first mode of operation, the control assembly 34 is configured so that the elements 16 arranged on a given tongue 22 have substantially identical maximum light intensities.
    Advantageously, the control assembly 34 has at least one other selectively activatable operating mode.
    For example, it includes at least one operating mode from among:
    an operating mode in which the electrical powers supplied to the elements 16 are configured so that the maximum light intensities of the elements 16 are substantially identical, and an operating mode in which the control assembly 34 commands the elements to implement a light sequence during which all or part of the elements 16 is sequentially and / or simultaneously on and / or off.
    For example, one or the other of these modes is implemented in response to the detection of an event occurring at the level of the vehicle, such as the ignition of the vehicle, the opening of a door that it includes either the actuation of a direction change indication command.
    The operation of the device 2 will now be described with reference to the Figures.
    When the device 2 is started up, the control assembly 34 controls the supply of elements 16 with electrical energy, which results in their ignition.
    When the operating mode described above is implemented, for example by default, the assembly 34 regulates the electrical energy supplied so that the maximum intensities of at least two elements 16 are distinct, and advantageously by applying all or part of the intensity patterns described above.
    Another operating mode is for example consequently implemented, for example in response to the detection of an event at the vehicle level.
    The invention has several advantages.
    First of all, it makes it easy to obtain a distribution of light intensities that comply with regulatory requirements in a simple manner. In particular, this is particularly simple when this arrangement results from a control of the intensity of the electric current supplied to the electroluminescent elements.
    This is particularly advantageous for a curved device 2, for which obtaining a distribution of light intensities in accordance with regulatory requirements is not easy to reconcile with a homogeneous aspect of the device.
    权利要求:
    Claims (17)
    [1" id="c-fr-0001]
    1. Light emission module, in particular for a motor vehicle, comprising:
    - a substrate (14) comprising a main portion (20) curved extending in a longitudinal direction (D),
    - a plurality of electroluminescent elements (16) arranged on the substrate and configured to emit light rays when supplied with electrical energy, and
    - a control assembly (34) adapted to regulate the electrical energy supplied to the light-emitting elements, the control assembly having an operating mode in which the control assembly is configured for the supply to the light-emitting elements (16) of respective energies and / or electrical powers determined at least as a function of main directions of light emission (dpi, ..., dp6) respective of the light-emitting elements for obtaining at least two maximum light intensities emitted by the light-emitting elements according to the corresponding main direction of emission which are different along said longitudinal direction (D) of the substrate.
    [2" id="c-fr-0002]
    2. light emission module according to claim 1, wherein, in said operating mode, the control assembly (34) is configured to regulate the intensity of the electric current supplied to the electroluminescent elements for obtaining said light intensities different maximums.
    [3" id="c-fr-0003]
    3. Light emission module according to claim 1 or 2, wherein the substrate further comprises a plurality of tabs (22) extending from the main portion, the tabs being distributed along the longitudinal direction.
    [4" id="c-fr-0004]
    4. Light emission module according to claim 3, wherein the tongues are substantially planar.
    [5" id="c-fr-0005]
    5. Light emission module according to claim 3 or 4, wherein the electroluminescent elements (16) are arranged on the tongues (22), the electroluminescent elements arranged on a given tab forming a group of electroluminescent elements.
    [6" id="c-fr-0006]
    6. light emission module according to claim 5, wherein, in the operating mode, the control assembly (34) is configured to regulate the electric energy supplied to the electroluminescent elements for obtaining maximum light intensities provided by the substantially identical light-emitting elements within a given group.
    [7" id="c-fr-0007]
    7. Light emission module according to any one of the preceding claims, in which at least two electroluminescent elements have different operating characteristics so that the maximum light intensities respectively emitted by said two electroluminescent elements are different at a given supplied electrical power. , the electrical energy supplied to a given electroluminescent element (16) being also determined from the operating characteristics of said electroluminescent element (16).
    [8" id="c-fr-0008]
    8. Light emission module according to any one of the preceding claims, in which in said operating mode, for at least part of the length of the substrate along said longitudinal axis, the control assembly (34) is configured to regulate the energy and / or the electric power supplied to the electroluminescent elements so that the respective light intensities of the electroluminescent elements go increasing according to a given direction of travel of said part of the length of the substrate.
    [9" id="c-fr-0009]
    9. Light emission module according to any one of the preceding claims, in which the control assembly (34) comprises a plurality of control modules (36) respectively associated with at least one electroluminescent element and respectively configured to regulate the energy and / or electrical power supplied to the associated electroluminescent element or elements.
    [10" id="c-fr-0010]
    10. Light emission module according to claim 9, in which the control modules are arranged in contact with the substrate and are distributed along the substrate.
    [11" id="c-fr-0011]
    11. Light emission module according to any one of the preceding claims, in which, for at least part of the light-emitting elements (16), each light-emitting element of said part has a main direction of light emission angularly offset by normal (neither ocb ..., nor oc6 ) to the substrate at a region of said substrate receiving the electroluminescent element considered.
    [12" id="c-fr-0012]
    12. Light emission module according to claim 11, in which all or part of the electroluminescent elements (16) of said part has a main direction of light emission substantially parallel to a local plane tangential to the substrate at said area receiving l 'electroluminescent element considered.
    [13" id="c-fr-0013]
    13. Light emission module according to any one of the preceding claims, further comprising a diffusion screen (18) arranged facing the electroluminescent elements and designed to form a surface illuminated from the light rays emitted by the electroluminescent elements.
    [14" id="c-fr-0014]
    14. Light emission module according to claim 13, wherein the diffusion screen (18), the substrate (14) and the electroluminescent elements (16) are configured so that said illuminated surface is substantially homogeneous.
    [15" id="c-fr-0015]
    15. Lighting and / or signaling device for a motor vehicle, comprising a light emission module (10) according to any one of the preceding claims.
    [16" id="c-fr-0016]
    16. A lighting and / or signaling device according to claim 15, the vehicle extending along an axis (X), the control assembly (34) being configured for, in said operating mode,
    5 regulate the energy and / or the electric power supplied to said electroluminescent elements (16) so that the lighting and / or signaling device has a spatial distribution of light intensity having, for a plurality of directions, a light intensity emitted according to each of said directions having a value greater than a predetermined minimum value and / or a value less than a predetermined maximum value.
    10
    [0017]
    17. Lighting and / or signaling device according to claim 15 or 16, the vehicle extending along an axis (X), the control assembly (34) being configured to, in said operating mode, regulate the energy and / or electric power supplied to said light-emitting elements so that the maximum light intensity respectively emitted by all or part of the light-emitting elements (16) is greater the greater the angle formed between the
    15 main direction of emission of the electroluminescent element in question and the vehicle axis (X) is small.
    1/2
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    同族专利:
    公开号 | 公开日
    US10165641B2|2018-12-25|
    KR20180035160A|2018-04-05|
    EP3339094A1|2018-06-27|
    FR3056705B1|2020-07-24|
    CN107871806A|2018-04-03|
    US20180092180A1|2018-03-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0531185A1|1991-09-02|1993-03-10|Valeo Vision|Supporting structure, especially for signalling lights of motor vehicles, and its manufacturing process|
    US20030193815A1|2002-04-11|2003-10-16|Esam Co., Ltd.|Side mirror cover and cover lamp to be used therefor|
    DE102006031345A1|2006-07-06|2008-01-10|Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH|Shapely flexible lighting system|
    EP1914116A2|2006-10-20|2008-04-23|Ichikoh Industries, Ltd.|Ligthing fixture for vehicle|
    JP2011187331A|2010-03-09|2011-09-22|Stanley Electric Co Ltd|Headlight for vehicle|
    EP2671756A2|2012-06-08|2013-12-11|LG Innotek Co., Ltd.|Lamp unit and vehicle using the same|
    US20030147253A1|2002-02-06|2003-08-07|Jack Shy|Curved warning light device for attaching to vehicle|
    KR20060034274A|2003-07-09|2006-04-21|코닌클리케 필립스 일렉트로닉스 엔.브이.|Electroluminescent display device with duty cycle control|
    FR2962877B1|2010-07-13|2014-03-21|Valeo Vision|METHOD FOR CONTROLLING LIGHT EMITTING DIODES|
    FR2989647B1|2012-04-23|2015-02-27|Peugeot Citroen Automobiles Sa|MULTIFUNCTIONAL OPTICAL VEHICLE OPTICAL BLOCK WITH LIGHT SOURCES AND CONTROLLED LIGHT INTENSITY|
    US20140265934A1|2013-03-15|2014-09-18|Federal-Mogul Corporation|Vehicle interior lighting|
    US10064259B2|2016-05-11|2018-08-28|Ford Global Technologies, Llc|Illuminated vehicle badge|FR3056678B1|2016-09-28|2020-07-24|Valeo Vision|IMPROVED LIGHT EMISSION MODULE FOR MOTOR VEHICLES|
    CN108644735B|2018-04-25|2020-03-20|东风汽车有限公司|Dynamic signal lamp and control method thereof|
    US11131438B2|2018-12-19|2021-09-28|Valeo North America, Inc.|IR illuminator with secondary function|
    DE102019219721A1|2019-12-16|2021-06-17|Vosla Gmbh|LED light strips and vehicle light|
    法律状态:
    2017-09-29| PLFP| Fee payment|Year of fee payment: 2 |
    2018-03-30| PLSC| Publication of the preliminary search report|Effective date: 20180330 |
    2018-09-28| PLFP| Fee payment|Year of fee payment: 3 |
    2019-09-30| PLFP| Fee payment|Year of fee payment: 4 |
    2020-09-30| PLFP| Fee payment|Year of fee payment: 5 |
    2021-09-30| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1659231A|FR3056705B1|2016-09-28|2016-09-28|IMPROVED CONTROL LIGHT EMISSION MODULE ESPECIALLY FOR MOTOR VEHICLES|
    FR1659231|2016-09-28|FR1659231A| FR3056705B1|2016-09-28|2016-09-28|IMPROVED CONTROL LIGHT EMISSION MODULE ESPECIALLY FOR MOTOR VEHICLES|
    EP17190846.0A| EP3339094A1|2016-09-28|2017-09-13|Light-emitting module with improved control, in particular for motor vehicle|
    KR1020170124142A| KR20180035160A|2016-09-28|2017-09-26|Light emission module with enhanced control in particular for a motor vehicle|
    CN201710889542.2A| CN107871806A|2016-09-28|2017-09-27|The light emitting module that enhancing particularly for motor vehicles controls|
    US15/718,111| US10165641B2|2016-09-28|2017-09-28|Light emission module with enhanced control in particular for a motor vehicle|
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