EP4198376A1 - Dispositif lumineux pour véhicule automobile - Google Patents

Dispositif lumineux pour véhicule automobile Download PDF

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Publication number
EP4198376A1
EP4198376A1 EP21215783.8A EP21215783A EP4198376A1 EP 4198376 A1 EP4198376 A1 EP 4198376A1 EP 21215783 A EP21215783 A EP 21215783A EP 4198376 A1 EP4198376 A1 EP 4198376A1
Authority
EP
European Patent Office
Prior art keywords
mask
luminous device
masks
lighting module
lighting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21215783.8A
Other languages
German (de)
English (en)
Inventor
Francois Bayle
Hui Jin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Priority to EP21215783.8A priority Critical patent/EP4198376A1/fr
Priority to CN202211616792.6A priority patent/CN116336414A/zh
Publication of EP4198376A1 publication Critical patent/EP4198376A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/06—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using crossed laminae or strips, e.g. grid-shaped louvers; using lattices or honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the present invention relates to a luminous device of a vehicle lamp of an automotive vehicle. More particularly, the present invention relates to a luminous device of a signaling lamp of an automotive vehicle.
  • a vehicle luminous device for example a pixelated tail lamp, known to a person skilled in the art is adapted to display a pictogram, visible from outside of the vehicle, at several meters.
  • Such luminous devices may be composed of a plurality of homogenous light emitting surfaces, a plurality of light source supports, a plurality of light sources, and a plurality of masks having a plurality of cavities through which the light emitted by the light sources is sent towards an outer lens.
  • the cavities of the masks separate light beams of each LED to make sure that one LED illuminates one pixel so that the shadowing effect can be prevented.
  • the light source supports, the light sources, and the masks are arranged in such a way that they cooperate to produce a good luminous homogeneity of the pixels over the plurality of surfaces/areas.
  • the cavities of the masks may act as physical barriers to reduce the light leakage between the adjacent light areas. It is necessary the masks have to follow the curvature of the outer lens. It is also necessary that the masks should be rigidly positioned and the tolerances between different parts of the lighting module should be maintained due to high optical requirements.
  • an object of the invention is to alleviate the above mentioned problems.
  • an object of the invention is to provide a curved interlocking mask structure having a plurality of masks for a vehicle luminous device, for example, a pixelated light module.
  • Another object of the present invention is to provide different locking mechanisms to provide a curved interlocking mask structure of the vehicle luminous device.
  • Another object of the present invention is to reduce the tooling cost for making the curved interlocking mask structure of the vehicle luminous device.
  • Another object of the present invention is to make the plurality of masks of the curved interlocking mask structure in a single mold and can be oriented along different directions in the vehicle luminous device to produce homogeneous lit aspect.
  • a luminous device for an automotive vehicle comprising: a plurality of lighting modules juxtaposed along a given direction; and an outer lens arranged to project a light beam emitted from the plurality of lighting modules.
  • Each lighting module comprises: a light source support mounted with a plurality of light sources on its first face and a mask disposed opposite to the first face of the light source support.
  • the mask comprises a plurality of cavities through which light rays emitted from the plurality of light sources are directed towards the outer lens.
  • the mask of each lighting module is provided with a locking means intended to connect masks of the plurality of lighting modules.
  • the plurality of masks can be interlocked by the locking means to provide an interlocking mask structure that can be rigidly positioned in the lighting module.
  • the locking means between the masks allow the masks to orient in different directions so that the light emitted by the light sources can be sent out in an efficient manner without light leakage between adjacent masks of the interlocking mask structure.
  • the locking means is a flexible connecting link.
  • Flexible means elastically flexible.
  • the locking means include at least one notch in the first lateral face of the mask and at least one protrusion in the second lateral face opposite to the first lateral face.
  • the at least one protrusion of a first mask can be engaged in the corresponding at least one notch of an identical mask juxtaposed horizontally along the given direction of the luminous device.
  • each mask can be molded independently and can be assembled together using the notches and protrusions to provide the interlocking mask structure. Hence, with this configuration, the process of molding can be simplified.
  • the outer lens is curved and the masks associated with the plurality of lighting modules are arranged in a curved manner to follow the curvature of the outer lens.
  • the molds of the masks are designed in such a way that when the masks are interlocked, the interlocked mask structure follows the curvature of the outer lens.
  • the molds are designed in such a way that lateral sides of the masks are not parallel to each other so that when the masks are interlocked, the interlocked mask structure follows the curvature of the outer lens.
  • each mask has a trapezoidal form.
  • the mold(s) can be designed such that when they interlock together, the interlocking structure follows the curvature of the outer lens.
  • the masks of the plurality of lighting modules have the same dimensions.
  • the tooling cost can be minimized or reduced by making the masks of the same dimensions.
  • each lighting module further comprises a diffusing screen and/or an opaque grid, which has cells separated by opaque portions, and each cell is positioned over one cavity of the mask of the corresponding lighting module.
  • the mask of each lighting module includes a first end, which faces the light source support, and a second end opposite to the first end, which faces the diffusing screen, and the opaque grid is arranged opposite to the diffusing screen.
  • the diffusion screen allows for improved homogeneity of the lit appearance of each pixel.
  • the opaque grid is made of a thermoplastic material such as polycarbonate (PC) or poly (methyl methacrylate) (PMMA) and may be in the form of a self-adhesive film. Thus, it will stick on to the diffusing screen.
  • the opaque grid can be made of injected thermoplastic material, and positioned in front of the diffusing screen by fixation means such as clips or screws.
  • fixation means such as clips or screws.
  • the diffusing screen and the opaque grid avoids light pollution from one pixel to another pixel of a pixel matrix, which is formed by the cavities of the pluralities of masks.
  • Each cavity defines one pixel of the pixelated lamp.
  • Each light source can be piloted individually by piloting means, so that a predefined pixelated image can be displayed.
  • the present invention also relates to a vehicle signaling lamp comprising at least one lighting module according to the present invention.
  • Vehicle luminous devices are associated with vehicles to perform different lighting and/or signaling functions and auxiliary functions.
  • a pixelated tail lamp one such luminous device, known to a person skilled in the art, is adapted to display a pictogram, visible from outside of the vehicle, at several meters.
  • the vehicle is a motor vehicle.
  • the luminous device according to an embodiment is a tail lamp of an automotive vehicle.
  • the tail lamp is a pixelated tail lamp.
  • a pictogram in particular can be displayed.
  • the vehicle luminous device comprises a plurality of lighting modules juxtaposed along a given direction, for instance, along a transverse direction of the vehicle; and an outer lens configured to project a light beam emitted from the plurality of lighting modules.
  • Fig.1 illustrates a lighting module of a vehicle luminous device, according to an embodiment of the present invention.
  • the luminous device includes one or more lighting modules.
  • the lighting module 1 comprises a longitudinal axis Az which extends from the front to the rear of the motor vehicle and which is parallel to the vehicle axis (not illustrated). It should be noted that lighting module 1 can be arranged in other orientations. In this case, the longitudinal axis Az has orientation corresponding substantially to the direction in which the lighting module 1 is intended to be observed.
  • Each lighting module 1 of the luminous device 3 comprises a light source support 10 mounted with a plurality of light sources 11 on its first face, and a mask 12 disposed opposite to the first face of the light source support 10.
  • the light source support 10 is a plane electronic holder.
  • the light source support 10 extends along a transverse axis Ax that is perpendicular to the longitudinal axis Az of the lighting module 1.
  • the light source support 10 is a printed circuit board, otherwise known as PCB.
  • the lighting module 1 comprises two light source supports 10 positioned with an angle between them, as it is visible on Fig.1 .
  • light sources 11 are semiconductor light sources, for instance, light emitting diodes (LEDs).
  • the LEDs may be OLEDs (organic LEDs), AMOLEDs (Active-matrix-organic-LEDs) or FOLEDs (flexible OLEDs).
  • the mask 12 comprises a plurality of cavities 14 through which light rays emitted from the plurality of light sources 11 are directed towards the outer lens 19. For clarity, only some of the cavities 14 have been referenced in Fig.1 .
  • the mask 12 of each lighting module 1 are provided with a locking means intended to juxtapose and connect masks of the plurality of lighting modules 2 along a transverse axis (not shown in Figures) of the luminous device 3.
  • the light sources 11 are configured to emit light rays that will pass through cavities 14 of the mask 12. Each light source 11 is arranged opposite a single cavity.
  • the mask has two ends, a first end of which faces the first face of the support 10 and a second end of which is opposite the first end, facing a diffusing screen 17.
  • Each mask 12 includes cavities 14 bounded by partitions that form the walls of the cavities.
  • the cavities form an array of pixels.
  • the pixel array allows a pictogram or moving image to be formed by turning on the appropriate light sources 11 for the pictogram or moving image to be formed.
  • the luminous device 3 can display a suitable pictogram visible at several meters to warn a vehicle behind the motor vehicle. This improves the safety of the occupants of the motor vehicle and provides early warning or other information to the following vehicle or a pedestrian or a bicycle etc.
  • the lighting module 1 further comprises an opaque grid 18, which has cells/apertures 180 separated by opaque portions, and each cell is positioned over one cavity 14 of the mask of the corresponding lighting module 1.
  • the apertures have the same shape as pixels. Thus, in the same way as the pixels, they have hexagonal shape.
  • the set of apertures also form a honeycomb.
  • the apertures and the pixels could have other forms, for example square, rectangle, triangle or other polygons, or circle, ellipse, oval. The form may be different from one aperture and/or pixel to another one.
  • they are arranged in a matrix.
  • the apertures 180 have the same shape as the pixels.
  • the mask 14 of the lighting module 1 includes a first end, which faces the light source support 10, and a second end opposite to the first end, which faces the diffusing screen 17, and the opaque grid 18 is arranged opposite to the diffusing screen 17.
  • the diffusing screen 17 allows for improved homogeneity of the lit appearance of each pixel.
  • the diffusing screen 17 is grain structure or white. It mixes the light rays from the light sources 11 that pass through the cavities 14 to have homogeneous light.
  • the diffusing screen 17 is made of a plastic material, such as PC or PMMA.
  • the opaque grid 18 is made of polycarbonate and in the form of self-adhesive film. Thus, it will stick on the diffusing screen 17.
  • the diffusing screen 17 and the opaque grid 18 avoids light pollution from one pixel to another pixel of the pixel matrix.
  • the lighting module 1 is provided with two supports 10 each comprising a plurality of light sources 11 and two masks 14, each of which is arranged to one of the supports 10.
  • Two supports 10 form a certain angle between them. This makes it possible to adapt to the curved shape of the luminous device 3 in which the lighting modules 1 are integrated. It should be noted that using several supports instead of single support reduces the manufacturing cost of the lighting module 1. Indeed, since the dimensions of the luminous device 3 are large, it is economical to manufacture smaller supports instead of a single large support.
  • the exemplary lighting module depicted in the Fig.1 includes two diffusing screens and two opaque grids. However, it is understood by a person skilled in the art that the present invention is not limited to two supports, two diffusing screens, and two opaque grids in the lighting modules. The lighting module could comport more than two of these elements, and/or other additional elements.
  • the luminous device 3 when assembled with the plurality of lighting modules 1, the masks 12 of the lighting module 1 have to be properly arranged such that the masks 12 should be rigid and the tolerances between different parts of the luminous device 3 is maintained.
  • the present invention provides a curved interlocking mask structure formed by connecting the masks 12 of the lighting modules 1 of the luminous device 3.
  • the mask 12 of each lighting module 1 is provided with a locking means intended to juxtapose and connect masks 12 of the plurality of lighting modules 1 along a transverse axis of the luminous device 3.
  • the plurality of masks 12 can be interlocked by the locking means to form the interlocking mask structure that can be rigidly positioned in the luminous device 3.
  • Fig.2a illustrates an unassembled state of curved interlocking mask structure having a plurality of masks for a vehicle luminous device, according to an embodiment of the invention.
  • Fig.2b illustrates an assembled state of a curved interlocking mask structure having a plurality of masks for a vehicle luminous device, according to an embodiment of the invention.
  • the masks 12 of the lighting module 1 may be interlocked by locking means formed integrally with each mask 12.
  • the locking means formed with each mask 12 includes at least one notch 115 on its a first lateral side 105 and at least one protrusion 120 on its a second lateral side 110 opposite to the first lateral face 105.
  • each mask 12 is formed with two notches 115 on its first lateral side 105 and two protrusions 120 on its second lateral side 110.
  • each 12 mask may include plurality of notches and plurality of protrusions, without any limitation.
  • each mask 12 can be molded independently and can be assembled together using the notches 115 and protrusions 120 to provide the interlocking mask structure. Hence, with this configuration, the process of molding can be simplified.
  • Fig.3a illustrates a curved interlocking mask structure having a plurality of masks for a vehicle luminous device, according to another embodiment of the invention.
  • the masks of the lighting module may be interlocked by locking means, which is a flexible connecting link 125, and is elastically flexible.
  • the curved interlocking mask structure according to this embodiment includes a plurality of masks 12 in which adjacent masks are connected by a flexible connecting link 125, as can be seen in the Fig.3a .
  • the masks 12 of this embodiment may be injected in the same mold and demolding axis of the masks are in the same direction.
  • Fig.3b illustrates a mold position of a pair of masks of the curved interlocking mask structure shown in Fig.3a .
  • a demolding axis A of a first mask is in the same direction as a demolding axis B of a second mask, and both the masks are connected using the flexible connecting link 125.
  • the flexible connecting links enable the injection of the masks in the same mold.
  • the links 125 are connected to the two adjacent masks 12 respectively on one edge between two faces of each of these masks, comprising the lateral facing faces of said two masks. This configuration ensures an easier molding as there is no gap between the mask and the link in direction of the respective demolding axis A and B.
  • Fig.3c illustrates an assembly position of a pair of masks of the curved interlocking mask structure shown in Fig.3a .
  • a demolding axis A of a first mask and a demolding axis B of a second mask are oriented in different directions, and both the masks are connected using the flexible connecting link 125.
  • a single flexible connecting link is shown in the figures to connect the two adjacent masks, it is understood to a person skilled in the art that adjacent masks may be connected using more than one flexible connecting link.
  • the masks 12 can be oriented in different directions, and thus the homogenous-lit aspect can be realized. According to this embodiment, it is possible to make the interlocking mask structure using a single mold, thereby reducing the tooling cost.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP21215783.8A 2021-12-17 2021-12-17 Dispositif lumineux pour véhicule automobile Pending EP4198376A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21215783.8A EP4198376A1 (fr) 2021-12-17 2021-12-17 Dispositif lumineux pour véhicule automobile
CN202211616792.6A CN116336414A (zh) 2021-12-17 2022-12-15 用于机动车的发光设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21215783.8A EP4198376A1 (fr) 2021-12-17 2021-12-17 Dispositif lumineux pour véhicule automobile

Publications (1)

Publication Number Publication Date
EP4198376A1 true EP4198376A1 (fr) 2023-06-21

Family

ID=78957565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21215783.8A Pending EP4198376A1 (fr) 2021-12-17 2021-12-17 Dispositif lumineux pour véhicule automobile

Country Status (2)

Country Link
EP (1) EP4198376A1 (fr)
CN (1) CN116336414A (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660461A (en) * 1994-12-08 1997-08-26 Quantum Devices, Inc. Arrays of optoelectronic devices and method of making same
US20050083691A1 (en) * 2003-10-21 2005-04-21 Lightshapes Inc. Modular lighting assembly
DE102004020493A1 (de) * 2004-04-26 2005-11-17 Schefenacker Vision Systems Germany Gmbh & Co. Kg Lichtverteilungsbaugruppe mit einer Vielzahl von Modulen
US20180312102A1 (en) * 2017-04-27 2018-11-01 Lg Electronics Inc. Vehicle lamp using semiconductor light emitting device
FR3097936A1 (fr) * 2019-06-28 2021-01-01 Valeo Vision Dispositif lumineux pour véhicule automobile
US20210108770A1 (en) * 2019-10-14 2021-04-15 Teknoware Oy Light module, and method and arrangement for assembling a lighting device of a vehicle from the light modules

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660461A (en) * 1994-12-08 1997-08-26 Quantum Devices, Inc. Arrays of optoelectronic devices and method of making same
US20050083691A1 (en) * 2003-10-21 2005-04-21 Lightshapes Inc. Modular lighting assembly
DE102004020493A1 (de) * 2004-04-26 2005-11-17 Schefenacker Vision Systems Germany Gmbh & Co. Kg Lichtverteilungsbaugruppe mit einer Vielzahl von Modulen
US20180312102A1 (en) * 2017-04-27 2018-11-01 Lg Electronics Inc. Vehicle lamp using semiconductor light emitting device
FR3097936A1 (fr) * 2019-06-28 2021-01-01 Valeo Vision Dispositif lumineux pour véhicule automobile
US20210108770A1 (en) * 2019-10-14 2021-04-15 Teknoware Oy Light module, and method and arrangement for assembling a lighting device of a vehicle from the light modules

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