EP3851737A1 - Post-câblage à del avec composant optique - Google Patents

Post-câblage à del avec composant optique Download PDF

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Publication number
EP3851737A1
EP3851737A1 EP20152656.3A EP20152656A EP3851737A1 EP 3851737 A1 EP3851737 A1 EP 3851737A1 EP 20152656 A EP20152656 A EP 20152656A EP 3851737 A1 EP3851737 A1 EP 3851737A1
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EP
European Patent Office
Prior art keywords
mounting face
light emitting
lighting device
mounting
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
EP20152656.3A
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German (de)
English (en)
Inventor
designation of the inventor has not yet been filed The
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.)
Lumileds Holding BV
Original Assignee
Lumileds Holding BV
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 Lumileds Holding BV filed Critical Lumileds Holding BV
Priority to EP20152656.3A priority Critical patent/EP3851737A1/fr
Publication of EP3851737A1 publication Critical patent/EP3851737A1/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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof

Definitions

  • the present disclosure relates to a lighting device comprising at least one optical component in particular configured to adjust a ratio of an intensity of light such that the lighting element may be suitably employed as retrofit mimicking a halogen lamp e.g. for an automotive headlight.
  • the present disclosure further, relates to an automotive headlight.
  • Lighting devices such as halogen lamps have been standard light sources for automotive headlights for many years.
  • LED technology recent advances in LED technology and energy efficiency has spurred interest in finding suitable replacements for halogen lamps based on LED technology, such replacement being often referred to as LED retrofit.
  • LED retrofits have become popular in recent years, capabilities of LED retrofits in mimicking halogen lamps are not yet optimal.
  • a reason therefor lies in differing geometries of light emission regions of halogen lamps (filament) and e.g. LED dies (light emission surfaces).
  • intensity distributions of light emitted from LED arrangements of existing LED retrofits differ from corresponding intensity distributions of light emitted from halogen lamps and may result in light emission disturbing and endangering oncoming traffic when used in combination with existing headlight reflectors and optics.
  • An approach to mimic a halogen lamp filament is to arrange three rows of LEDs, in particular LED dies, on three respective surfaces (mounting faces) of an elongated, essentially cuboidal, mounting section to emit light in three respective directions. While such LED arrangement is suitable to mimic a near-field luminance profile of a halogen lamp, mimicking also a far-field luminance profile of a halogen lamp still remains a problem to be solved. It was found that in case of the three row arrangement, a superposition of usually Lambertian light intensity profiles of individual LEDs causes undesirable intensity peaks in lighting directions forming an angle of 45° with respective surface normals of adjacent mounting faces.
  • a lighting device comprising a mounting section comprising a first mounting face and a second mounting face arranged at an angle, in particular of 90° ⁇ 5°, in particular ⁇ 2°, with respect to the first mounting face; a first light emitting element arranged on the first mounting face and a second light emitting element arranged on the second mounting face; and an optical component configured to adjust a ratio of an intensity of light emitted from the first and second light emitting elements in a first lighting direction to an intensity of light emitted from the first and second light emitting elements in a second lighting direction, wherein the second lighting direction is along a surface normal of the first or second mounting face and the first lighting direction is at an angle, in particular of 45° ⁇ 5°, in particular ⁇ 2°, with respect to the second lighting direction.
  • an automotive headlight comprising such a lighting device.
  • Exemplary embodiments of the first and second aspects of the invention may have one or more of the properties described below.
  • the optical component is or comprises an optical element configured for at least partially absorbing, reflecting, and/or refracting light, in particular at least along the first direction.
  • the optical component may in an exemplary embodiment thus correspond to or comprise an optical absorption element, an optical reflection element, a prism, and/or an optical filter.
  • the optical component is configured to adjust the ratio of the intensity of light emitted in the first lighting direction to the intensity of light emitted in the second lighting direction by reducing the intensity emitted along the first lighting direction.
  • “along the first lighting direction” is to be understood as encompassing an angular distribution centered around the first direction of e.g. ⁇ 30° (a 60° cone angle), in particular of ⁇ 15°, in particular of ⁇ 10°.
  • the optical component is configured to adjust an angular intensity distribution of light emitted from the first and second light emitting elements reducing an intensity emitted at angles in between surface normals of adjacent mounting faces.
  • an intensity of light emitted under 45° ( ⁇ 30°) and/or 135° ( ⁇ 30°) is reduced, in particular without affecting a light intensity along the second lighting direction (and within an angular region centered around the second lighting direction of e.g. ⁇ 30° (a 60° cone angle), in particular of ⁇ 15°, and further in particular of ⁇ 10°).
  • an intensity distribution of light emitted from the lighting device is highly improved.
  • the lighting device when used in a vehicular, e.g. automotive, headlight, and is thus used with typical headlight optics, unwanted effects such as glare potentially disturbing oncoming traffic can be reduced.
  • the optical component thus helps to mitigate the otherwise existing undesirable intensity peaks and therefore allows for the inventive lighting device to not only suitably mimic an intensity distribution of a halogen lamp in the near-field but also in the far-field.
  • the first lighting direction forms a same angle with respect to the surface normal of the first mounting face and with respect to the surface normal of the second mounting face.
  • the first and the second mounting faces are adjacent mounting faces, i.e. are connected with each other by a portion of the mounting section at which no light emitting elements are mounted.
  • the first lighting direction is at an angle bisecting an angle formed by the surface normal of the first mounting face and the surface normal of the second mounting face.
  • the first mounting face and the second mounting face are arranged at an angle of 90° ⁇ 5°, in particular ⁇ 2°, with respect to each other, and the first lighting direction is at an angle of 45° ⁇ 5°, in particular ⁇ 2°, with respect to the surface normal of the first mounting face and at an angle of 45° ⁇ 5°, in particular ⁇ 2°, with respect to the surface normal of the second mounting face.
  • the optical component thus advantageously affects directions in which Lambertian emissions of respective light emitting elements could otherwise cause undesirable intensity peaks.
  • the mounting section corresponds to a member elongated along a corresponding longitudinal axis.
  • the first light emitting element corresponds to an arrangement of at least two first light emitting elements arranged on the first mounting face along the longitudinal axis of the mounting section.
  • the at least one second light emitting element corresponds to an arrangement of at least two second light emitting elements arranged on the second mounting face along the longitudinal axis of the mounting section.
  • the mounting section further comprises a third mounting face arranged adjacent to the second mounting face and opposing the first mounting face, and at least two third light emitting elements are arranged on the third mounting face along the longitudinal axis of the mounting section.
  • Such configuration with an elongated mounting section and corresponding longitudinal arrangements of light emitting elements advantageously enables mimicking properties of a filament of a halogen lamp in particular in the near-field.
  • the third mounting face is arranged at an angle of 90° ⁇ 5°, in particular ⁇ 2°, with respect to the second mounting face and is arranged essentially parallel (at an angle of 0° ⁇ 5°, in particular ⁇ 2°) with respect to the first mounting face. In this way, it becomes possible to arrange light emitting elements to emit light in three mutually orthogonal directions to advantageously mimic a corresponding property of a halogen lamp filament.
  • the first light emitting element, the second light emitting element, and/or the third light emitting element comprises a light emitting diode (LED), in particular an LED die.
  • LED light emitting diode
  • Use of LEDs advantageously enables provision of a highly efficient light source that can be designed e.g. in terms of light color and/or temperature to suitably match corresponding demands e.g. in the field of automotive headlights.
  • the optical component is configured to reduce the intensity of light emitted from the first and second light emitting elements in the first lighting direction by at least 10%, in particular by at least 17%, in particular by at least 25%, in particular by at least 30%, in particular by at least 35%, and in particular by at least 40%.
  • the optical component is thus advantageously suited to remove undesirable intensity peaks in areas in which for example side portions of Lambertian emission of corresponding light emitting elements are superimposed.
  • the optical component is arranged at the lighting device to not affect the intensity of light emitted from the first and second light emitting elements in the second lighting direction.
  • the optical component is configured to allow for transmission of light emitted from the first and second light emitting elements in the second lighting direction to at least 80%, in particular to at least 90%, in particular to at least 95%.
  • the optical component is arranged at the lighting device and/or configured to reduce intensity only where needed, i.e., in regions where overlapping intensity distributions of different light emitting elements undesirably cause intensity peaks, while at least essentially not affecting intensity in regions where the corresponding requirements are already fulfilled.
  • a driving current for driving the light emitting elements may be increased accordingly. It was found that an increase in driving current needed to cope with an intensity reduction along the first lighting direction can be kept within limits tolerable for light emitting elements such as LEDs.
  • the optical component is configured to reduce the intensity of light emitted from the first and second light emitting elements in the first lighting direction by absorbing and/or reflecting light emitted in the first lighting direction and/or by refracting light emitted from the first and second light emitting elements at least partially away from the first lighting direction.
  • at least a portion of the optical component where light intensity needs to be reduced may be made less transparent, for example 30-40% less transparent, for instance by applying an absorbing coating on a side of the optical component (e.g. a plane or curved glass or transparent plastic member) facing the mounting section.
  • the optical component may comprise an at least partially reflective portion facing the mounting section.
  • about 30% e.g.
  • a partially reflective portion may be made e.g. by sputtering aluminum.
  • the optical component comprises a partially reflective portion comprising aluminum.
  • the partially reflective portion comprises a dielectric mirror.
  • absorptive or reflective coating may for example be placed on an outside or inside of a glass bulb.
  • the optical component comprises an at least partially absorptive and/or at least partially reflective shield.
  • shield is to be understood as a device that reduces transmission of light emitted from the first and second light emitting elements in the first lighting direction.
  • the at least partially absorptive and/or at least partially reflective shield comprises glass or a transparent plastic and (e.g. provided with) an absorptive and/or reflective coating.
  • the coating is provided on a side of the shield facing the mounting section. In particular the latter arrangement turned out to be advantageous as it helps to prevent light from entering the shield (in a light guide mode of the shield) and to be undesirably guided to an exit portion where it could otherwise again cause undesirable light peaks.
  • the at least partially absorptive and/or at least partially reflective shield is at least partially curved, wherein a corresponding radius of curvature of the at least partially absorptive and/or at least partially reflective shield corresponds to a distance between the mounting section and the at least partially absorptive and/or at least partially reflective shield.
  • “corresponds to” is to be understood in that the radius of curvature is equal to said distance ⁇ 20%, in particular ⁇ 15%, in particular ⁇ 10%, in particular ⁇ 5%. It turned out that this form of the optical component is in particular advantageous in terms of efficiency regarding space and material requirements. It is noted that, e.g. as opposed to the use of a closed glass bulb provided with suitable absorptive and/or reflective coatings, use of the shield turned out to be advantageous as it advantageously allows transport of heat generated by the light emitting elements away from the lighting device.
  • the optical component is arranged at the lighting device and configured to at least partially block/absorb/reflect light.
  • the optical component may correspond to or comprise one or more prisms, e.g. a single larger prism or a plurality of smaller (e.g. Fresnel-) prisms that are arranged in close vicinity of light emission portions of the selected light emitting elements.
  • close vicinity is to be understood such that a gap, e.g. an air gap, is present between the one or more prisms and the corresponding light emission portions of the light emitting elements.
  • the optical component comprises a prism assigned to the (arranged in correspondence with the/arranged to collect light from the/arranged next to a light emitting portion of the) first light emitting element arranged on the first mounting face and/or to the third light emitting element arranged on the third mounting face.
  • the prism is arranged next to a light emitting portion of the light emitting elements arranged on the first, the second and/or the third mounting faces, a gap, e.g. an air gap, separating the prism and the light emitting portion of the light emitting elements.
  • an intensity distribution in particular of light emitted from the first (and/or third) light emitting element arranged on the first (and/or third) mounting face, may be made narrower to reduce an intensity in regions of overlap and to thus reduce the undesired intensity peaks.
  • an angle selective filter for example brightness enhancement optics such as e.g. Fresnel structures, may advantageously be employed.
  • the optical component comprises an angle selective filter assigned to the first light emitting element arranged on the first mounting face and/or to the third light emitting element arranged on the third mounting face and configured to allow for light transmission within an angular range smaller than an angular range of a light transmission from a light emitting surface of the first and/or third light emitting elements.
  • the angle selective filter comprises a prism array and/or a brightness enhancement film.
  • Figure 1 shows a headlight 100 with a reflector 120 to which an exemplary H7 halogen lamp 110 is mounted.
  • a filament 111 of halogen lamp 110 is placed at a focus of reflector 120 such that light 132 emitted from filament 111 is reflected by the reflector 120 along a main lighting direction 150.
  • a cover 121 may incorporate suitable optics for shaping the reflected light and to form light 133 leaving headlight 100.
  • Lamp 110 comprises a socket 114 mounted to reflector 120 via mounting portion 116. Pins 117a and 117b extend from socket 114 for power connection.
  • Bulb 113 extends from base portion 115 surrounding filament 111 and ends in a light blocking portion 112 which blocks direct light from filament 111.
  • Figure 2A shows a side-view of a retrofit lamp 1 (an example of a lighting device according to an exemplary embodiment), lamp 1 being oriented in correspondence with lamp 100 of Fig. 1 .
  • a body 13 extends in between a light blocking portion 12 and a socket 14, and serves in particular as heat sink for heat generated by light emitting diodes (LEDs, examples of light emitting elements) 11.
  • LEDs light emitting diodes
  • Two rows 11 of LEDs are respectively arranged on a first mounting face 18a and a second mounting face 18b of a mounting section 18 arranged on a support part 13a of body 13.
  • LEDs 11a, 11b, 11c, 11d and 11e form an arrangement 11 of at least two first light emitting elements arranged on the first mounting face 18a along a longitudinal axis of mounting section 18 which in the present example is parallel to the main lighting direction 150.
  • a further row 11 of LEDs is arranged on a third mounting face 18c opposing the first mounting face 18a (see Figs. 2B and 2C ).
  • Figure 2A further shows an at least partially absorptive and/or at least partially reflective shield (an optical component) 31 arranged at lamp 1 to reduce an intensity of light emitted from the LEDs arranged on the first and second mounting faces 18a, 18b in a direction at an angle of 45° ⁇ 30° with respect to the surface normal of the first mounting face 18a and with respect to the surface normal of the second mounting face 18b.
  • a further shield 31 is arranged to reduce overlapping intensities of light emitted from LEDs respectively arranged on the second mounting face 18b and a third mounting face 18c.
  • shields 31 may be supported by transparent support sections 33 attached to socket 14 and/or body 13 and/or to light blocking portion 12 (see Fig. 2A ).
  • shield 31 and support sections 33 may be comprised by an integral glass or transparent plastic member provided with a suitable absorption and/or reflection coating on a face of said member facing mounting section 18 to form an at least partially absorptive and/or at least partially reflective shield 31. It is noted that portions of shield 31 covering areas where light absorption/reflection is not desirable (covering the second direction) may be provided with a a broad band anti-reflection coating in order to minimize light losses.
  • Figure 2C shows a cross-sectional view of lamp 1 of Figs. 2A and 2B .
  • shield 31 to the right of the figure is centered around the first lighting direction 153, the first lighting direction being at an angle of 45° with respect to a second lighting direction 151 along the surface normal of the first mounting face 18a and to a further second lighting direction 155 along the surface normal of the second mounting face 18b.
  • the at least partially absorptive and/or at least partially reflective shield 31 is centered with respect to a virtual plane (in direction 153) including the longitudinal axis of the mounting section 18 (perpendicular to the drawing plane) and bisecting an angle formed by the surface normal of the first mounting face 18a and the surface normal of the second mounting face 18b.
  • shield 31 covers an angle of 45° ⁇ 30° with respect to the surface normal of the second mounting face 18b (an angular coverage of 60°).
  • the at least partially absorptive and/or at least partially reflective shield 31 covers an angular range of ⁇ 10°, in particular of ⁇ 20°, in particular of ⁇ 30° with respect to the virtual plane.
  • Figures 3A and 3B illustrate a further exemplary embodiment of an optical component 40 in form of respective prisms 40 arranged adjacent to the first light emitting element arranged on the first mounting face 18a and/or to the third light emitting element arranged on the third mounting face 18c.
  • an air gap 19 is formed between the at least one prism 40 and a light emitting surface of the first light emitting element arranged on the first mounting face 18a and/or a light emitting surface of third light emitting element arranged on the third mounting face 18c.
  • Prisms 40 deflect light (along deflecting directions 152, 158) from LED arrangements 11 on mounting faces 18a, 18c towards body 13 (away from the second lighting directions 151 and 157, i.e., away from the surface normals of the first and third mounting faces 18a, 18c).
  • the intensity along the first lighting direction 153 of 45° with respect to the surface normal of the second mounting face 18b is reduced.
  • Airgap 19 between respective light emitting surfaces of the LEDs 11 and prisms 40 advantageously helps to allow for the deflection.
  • prism 40 can be realized as a prism bar 40 attached to light blocking portion 12 and body 13 (see Fig. 3B ) at respective attachment sections 41, 43.
  • Figure 4 shows a further exemplary embodiment of an optical component 50 which is configured as angle selective filter (which may be referred to also as brightness enhancement optic) assigned to a respective LED arrangement 11 and configured to narrow respective light intensity profiles of LEDs to thereby reduce the projected light emitting area and to thus reduce intensity in regions of overlap between LEDs of neighbouring arrangements.
  • an intensity distribution 162 without optical component 50 is narrowed into intensity distribution 161 with optical component 50.
  • optical component 50 helps to reduce an intensity along a first lighting direction 153 at an angle of 45° with respect to the surface normal of the second mounting face 18b and to thereby suitably adjust the beam profile on the road.
  • the angle selective filter 50 is realized as an array of prisms 50a, 50b, 50c assigned to a respective arrangement 11 of LEDs, whereby an air gap 19 is present between the optical component 50 and light emitting surfaces of the respective LEDs.
  • the prism array 50 may be mounted to the lighting device 1 in a similar fashion as optical component 40 in Fig. 3B .
  • Lighting device 1 LED arrangement 11 LEDs 11a, 11b, 11c, 11d, 11e Light blocking portion 12 Body 13 Support part 13a Socket 14 Mounting section 18 Mounting face 18a, 18b, 18c Air gap 19 Shield 31 Support sections 33 Prism, prism bar 40 Attachment sections 41, 43 Angle selective filter 50 Prisms 50a, 50b, 50c Headlight 100 Halogen lamp 110 Filament 111 Light blocking portion 112 Bulb 113 Socket 114 Base portion 115 Mounting portion 116 Pins 117a, 117b Reflector 120 Cover 121 Light rays 132, 133 Main lighting direction 150 First lighting direction 153 Second lighting directions 151, 155, 157 Deflecting directions 152, 158 Intensity distribution with angle selective filter 161 Intensity distribution without angle selective filter 162 edge-to-edge distance of shield 31 d curvature radius of shield 31 R

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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)
EP20152656.3A 2020-01-20 2020-01-20 Post-câblage à del avec composant optique Pending EP3851737A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20152656.3A EP3851737A1 (fr) 2020-01-20 2020-01-20 Post-câblage à del avec composant optique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20152656.3A EP3851737A1 (fr) 2020-01-20 2020-01-20 Post-câblage à del avec composant optique

Publications (1)

Publication Number Publication Date
EP3851737A1 true EP3851737A1 (fr) 2021-07-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20152656.3A Pending EP3851737A1 (fr) 2020-01-20 2020-01-20 Post-câblage à del avec composant optique

Country Status (1)

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EP (1) EP3851737A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030227774A1 (en) * 2002-06-10 2003-12-11 Martin Paul S. Axial LED source
EP2037167A2 (fr) * 2007-09-13 2009-03-18 Koito Manufacturing Co., Ltd. Unité d'éclairage pour phare de véhicule et phare de véhicule
WO2012147024A1 (fr) * 2011-04-29 2012-11-01 Koninklijke Philips Electronics N.V. Dispositif d'éclairage à del présentant une structure de dissipation de chaleur supérieure
WO2015091462A1 (fr) * 2013-12-17 2015-06-25 Koninklijke Philips N.V. Lampe à del pour feux de route et feux de croisement
WO2017036900A1 (fr) * 2015-09-02 2017-03-09 Lumileds Holding B.V. Module de led et module d'éclairage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030227774A1 (en) * 2002-06-10 2003-12-11 Martin Paul S. Axial LED source
EP2037167A2 (fr) * 2007-09-13 2009-03-18 Koito Manufacturing Co., Ltd. Unité d'éclairage pour phare de véhicule et phare de véhicule
WO2012147024A1 (fr) * 2011-04-29 2012-11-01 Koninklijke Philips Electronics N.V. Dispositif d'éclairage à del présentant une structure de dissipation de chaleur supérieure
WO2015091462A1 (fr) * 2013-12-17 2015-06-25 Koninklijke Philips N.V. Lampe à del pour feux de route et feux de croisement
WO2017036900A1 (fr) * 2015-09-02 2017-03-09 Lumileds Holding B.V. Module de led et module d'éclairage

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