EP3961085A1 - Systèmes d'éclairage pour phare de vèhicule - Google Patents

Systèmes d'éclairage pour phare de vèhicule Download PDF

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Publication number
EP3961085A1
EP3961085A1 EP20192564.1A EP20192564A EP3961085A1 EP 3961085 A1 EP3961085 A1 EP 3961085A1 EP 20192564 A EP20192564 A EP 20192564A EP 3961085 A1 EP3961085 A1 EP 3961085A1
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EP
European Patent Office
Prior art keywords
light
lens
protrusion
lighting system
automotive 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
EP20192564.1A
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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 LLC
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Lumileds LLC
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 LLC filed Critical Lumileds LLC
Priority to EP20192564.1A priority Critical patent/EP3961085A1/fr
Priority to EP21849047.2A priority patent/EP4189280A1/fr
Priority to US18/018,828 priority patent/US12018807B2/en
Priority to CN202180066859.0A priority patent/CN116324271A/zh
Priority to PCT/US2021/044038 priority patent/WO2022026911A1/fr
Publication of EP3961085A1 publication Critical patent/EP3961085A1/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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • 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
    • F21S41/10—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
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources

Definitions

  • the present invention relates in general to the field of automotive front-lighting, and in particular to an automotive lighting system for a vehicle.
  • LEDs Light Emitting Diodes
  • Advances in manufacturing have led to the emergence of chip-sized LED packages or modules in which a plurality of LEDs is packaged together, like a matrix comprising one or more rows of LEDs.
  • Such LED packages or modules typically produce a Lambertian luminous distribution centered about an optical axis of the package or module.
  • a lens is used to image a light distribution or a light pattern generated by the light source (for example a LED matrix) into the far field.
  • LEDs or pixels of the light source located at a periphery of the lens are typically spaced apart by a larger distance from the respective in-coupling portions of the light entrance surface of the lens, as compared with those LEDs or pixels of the light source located at a center of the lens. This results in a very large loss of light or an extremely low efficiency of light in-coupling at least at the edges of the lens.
  • any inhomogeneity or intensity structure produced by the light source will be projected and reproduced in the far field.
  • matrix systems a problem will arise where gaps between the individual LEDs or pixels of the light source are imaged as black lines in the far field.
  • an automotive lighting system for use in a vehicle which is distinguished by an improved performance, where performance is assessed at least on the illumination homogeneity and the efficiency of light in-coupling.
  • the present invention provides an automotive lighting system for use in a vehicle, so as to eliminate or at least alleviate one or more of the above mentioned shortcomings or disadvantages.
  • an automotive lighting system for use in a vehicle.
  • the automotive lighting system comprises a light source, a first lens and a second lens.
  • the light source comprises a first sub light source
  • the first lens comprises a light entrance surface and a light exit surface. From the perspective of propagation, light is firstly emitted out from the light source, for example from the first sub light source, then incident onto the first lens (for example onto the light entrance surface thereof), and refracted out thereby towards the second lens. After that, the second lens receives light refracted out from the first lens and helps to project it towards a road in front of the vehicle, thus providing lighting in front of the vehicle.
  • the light entrance surface of the first lens is provided with a first protrusion to receive light from the first sub light source.
  • first protrusion is located at a periphery of the light entrance surface of the first lens with respect to an optical axis of the automotive lighting system. For example, if the first lens is shaped to have a circular contour and the optical axis passes through the first lens at the circle's center, the first protrusion can be disposed at the circumference of such a circular first lens.
  • a first protrusion is introduced at a periphery of the light entrance surface of the first lens.
  • the light source especially the first sub light source
  • light will be incident firstly at the first protrusion provided on the light entrance surface of the first lens, pass therethrough such as by total internal reflections, and then enters the first lens.
  • more light coming out of the light source can be in-coupled into the first lens because of the extra light in-coupling element - the first protrusion, which is positioned ahead of the first lens so as to reduce the bigger distance existing otherwise between the light source and the first lens at an edge of the light entrance surface of the first lens if no protrusion is provided, thus leading to an increased efficiency of light in-coupling.
  • the first sub light source is located at an off-axis position with respect to the optical axis of the automotive lighting system, as similar to the first protrusion. This is beneficial for allowing a higher percentage of light from the first sub light source entering the first protrusion, again helping to increase the efficiency of light in-coupling furthermore.
  • the light source comprises a plurality of second sub light sources, which are distributed in an array along with the first sub light source.
  • the light entrance surface of the first lens is provided correspondingly with a plurality of second protrusions, which are distributed in an array along with the first protrusion across the light entrance surface of the first lens, where each of the plurality of second protrusions is configured to receive light from a respective one of the plurality of second sub light sources.
  • a matrix light pattern (such as a matrix high beam light pattern, where the light source acts to emit a high beam) can be provided by the proposed automotive lighting system of the present invention, where each pair of sub light source and its respective protrusion acts as a matrix pixel.
  • the first protrusion comprises a first light entrance face and a first light exit face opposite thereto, wherein the first light exit face of the first protrusion is in contact with the light entrance surface of the first lens. That is to say, the first light exit face of the first protrusion is a contact interface between the first protrusion and the first lens, where light is coming out from the upstream first protrusion and enters the downstream first lens.
  • the first protrusion is contiguous to the first lens at the first light exit face thereof, meaning that the first light exit face of the first protrusion is invisible in an external view of the automotive lighting system as assembled.
  • the first light exit face of the first protrusion is 1 to 4 times larger than the first light entrance face of the first protrusion. This helps to reduce the possibility that light is refracted out from the first lens after passing through the first protrusion. Thus, more light will be totally internal reflected into the first lens, helping to provide a higher efficiency of light use.
  • the light entrance surface of the first lens is shaped to be convex towards the light source and has its center located at the optical axis of the automotive lighting system.
  • the first light entrance face of the first protrusion is located at a same position as the center of the light entrance surface of the first lens.
  • the first light entrance face of the first protrusion keeps flush with the center of the first lens' light entrance surface.
  • an automotive lighting system for use as well in a vehicle.
  • the automotive lighting system for use in a vehicle comprises a light source, a first lens and a second lens too.
  • the first lens comprises a light entrance surface and a light exit surface
  • the first lens is configured to receive light from the light source at the light entrance surface and refract it onto the second lens
  • the second lens is configured to receive light from the first lens and project it towards a road in front of the vehicle.
  • the light source comprises not only a first sub light source but also a second sub light source
  • the light entrance surface of the first lens is provided not only with a first protrusion to receive light from the first sub light source but also with a second protrusion to receive light from the second sub light source.
  • the first protrusion in the above proposed automotive lighting system for a vehicle, comprises a first light entrance face and, opposite thereto, a first light exit face in contact with the light entrance surface of the first lens.
  • the second protrusion located at any position of the light entrance surface of the first lens, comprises a second light entrance face and, opposite thereto, a second light exit face in contact with the light entrance surface of the first lens.
  • a partial overlapping exists between the first light exit face of the first protrusion and the second light exit face of the second protrusion, such that the second lens projects light from the first and second sub light sources on the road in front of the vehicle as a light pattern with a first maximum light intensity I max1 , a second maximum light intensity I max2 , and a minimum light intensity I min between the first maximum light intensity I max1 and the second maximum light intensity I max2 , where I min /I max1 > 90% and I min /I max2 > 90%.
  • two protrusions i.e., the first and second protrusions
  • light exit faces of the two protrusions i.e., the first light exit face of the first protrusion and the second light exit face of the second protrusion
  • the partial overlapping between the light exit faces of the two protrusions helps to render the final light pattern projected by the second lens in front of the vehicle from the first and second sub light sources to have a uniform distribution of light intensity.
  • the final light pattern projected by the above automotive lighting system is a superposition result of two sub light patterns, which are projected by the second lens from the first and second sub light sources respectively.
  • a first maximum light intensity I max1 exists around the center of the first sub light pattern from the first sub light source
  • a second maximum light intensity I max2 exists around the center of the second sub light pattern from the second sub light source
  • a minimum light intensity I min exists between the first maximum light intensity I max1 and the second maximum light intensity I max2 , where I min /I min1 >90% and I min /I max2 >90%.
  • the partial overlapping between the first light exit face of the first protrusion and the second light exit face of the second protrusion is less than half of the first light exit face of the first protrusion and further less than half of the second light exit face of the second protrusion.
  • overlapping between the two protrusions, specifically between the light exit faces thereof is kept to be less than 50 percent of each light exit face.
  • At least one of the first light entrance face of the first protrusion and the second light entrance face of the second protrusion comprises a flat face perpendicular to an optical axis of the automotive lighting system.
  • the first protrusion and/or the second protrusion are provided with a flat light entrance face perpendicular to the optical axis of the automotive lighting system. This helps to keep the distance between each protrusion and its respective sub light source to be constant and preferably to be relatively small for example across the light entrance surface of the first lens, thus being beneficial for providing a high efficiency of light in-coupling across the whole light entrance surface of the first lens.
  • At least one of the first light entrance face of the first protrusion and the second light entrance face of the second protrusion is designed in a rectangle, round, triangle, or polygon contour.
  • at least one of the first light exit face of the first protrusion and the second light exit face of the second protrusion is designed in a rectangle or trapezoidal contour.
  • the first protrusion comprises a curved side face being contiguous to the first light entrance face at one end and to the first light exit face at the other end.
  • the first protrusion can be provided with a cylindrical side surface.
  • the second protrusion comprises a curved side face being contiguous to the second light entrance face at one end and to the second light exit face at the other end.
  • the second protrusion comprises a cylindrical side surface too.
  • the first protrusion comprises more than two flat side faces each being contiguous to the first light entrance face at one end and to the first light exit face at the other end.
  • the first protrusion can be provided with a prismatic side surface.
  • the second protrusion comprises more than two flat side faces each being contiguous to the second light entrance face at one end and to the second light exit face at the other end.
  • the second protrusion comprises a prismatic side surface too.
  • At least one of the flat side faces of the first or second protrusion encloses an acute angle with respect to the light entrance surface of the first lens, thus helping to ensure the partial overlapping between the light exit faces of the two protrusions.
  • the automotive lighting system for a vehicle proposed above in the first or second aspect of the present invention also comprises a third lens.
  • the third lens is configured to receive light from the light exit surface of the first lens and project it onto the second lens.
  • the third lens is located at an optically midway position between the first lens and the second lens, which is beneficial for providing a greater flexibility for example in beam shaping.
  • the present inventors have found that the above two configurations, involving the periphery position of at least one protrusion and the partial overlapping between light exit faces of two protrusions respectively, can be combined as well into one single automotive lighting system, and such an alternative aspect shall be encompassed as well within the scope of the present invention. Besides, this also renders it easy for a skilled person in the art to consider combining those preferred or optional improvements as made to each configuration of the automotive lighting system in the first or second aspect of the present invention in any feasible ways.
  • an automotive lighting system is proposed for use for example in a vehicle, according to a first aspect of the present invention.
  • the automotive lighting system 1 comprises a light source 11, a first lens 12 and a second lens 13, wherein the light source 11 comprises at least a first sub light source 111, such as an LED.
  • the first sub light source 111 is located at an off-axis position with respect to the optical axis L of the automotive lighting system 1, for example close to an upper edge of the first lens 12.
  • a first protrusion 141 is further provided on the light entrance surface 121 of the first lens 12, especially at a periphery thereof.
  • the first protrusion 141 is located at an upper edge of the light entrance surface 121 of the first lens 12. In this way, light emitted by the light source 11, especially by the first sub light source 111, is incident onto the first protrusion 141 before entering the first lens 12 at an optically downstream position.
  • the first protrusion 141 comprises a first light entrance face 1411 (i.e., the right face in the drawing) and a first light exit face 1412 ( i.e., the left face in the drawing), where light from the first sub light source 111 is incident firstly onto the first light entrance face 1411, refracted thereby, and gets inside the first protrusion 141.
  • light may undergo several times of total internal reflection while propagating within the first protrusion 141, and gets refracted out leftwards for example at the first light exit face 1412 of the first protrusion 141, thereby entering the first lens 12.
  • the in-coupling surface for the light from the first sub light source 111 is obviously moved forwards in an optically upstream direction, i.e., from the light entrance surface 121 of the first lens 12 to the first light entrance face 1411 of the first protrusion 141.
  • This forward moving of the in-coupling surface compensates nicely the larger distance at the edge of the first lens 12 that would exist otherwise between the first sub light source 111 and the light entrance surface 121 of the first lens 12 if no protrusion is provided, for example due to a curvature in the light entrance surface 121 of the first lens 12 (especially being convex in the optically upstream direction). This finally helps to increase the efficiency of light in-coupling from the light source 11 into the first lens 12, and to reduce the light loss at the edge of the first lens 12.
  • the present inventors have also found that a maximum efficiency of light in-coupling can be obtained, if the first light exit face 1412 of the first protrusion 141 is chosen to be 1 to 4 times larger than the first light entrance face 1411 of the first protrusion 141.
  • a plurality of first protrusions 141 can be introduced, which are for example equally spaced along a periphery of the light entrance surface 121 of the first lens 12, so as to increase the efficiency of light in-coupling and accordingly reduce the light loss at the edges of the automotive lighting system 1.
  • the second lens 13 light from the light source 11 (such as from the first sub light source 111) is projected onto a road in front of the vehicle after passing through the first protrusion 141 and the first lens 12.
  • the second lens 13, located at an optically last position in the automotive lighting system 1, comprises a projection lens.
  • the light source 11 also comprises one or more second sub light sources 112, such as two LEDs in the drawing.
  • the first sub light source 111 and the second sub light sources 112 can be distributed in an array, such as in a column perpendicular to the optical axis L of the automotive lighting system 1.
  • one or more second protrusions 142 are introduced as well on the light entrance surface 121 of the first lens 12, where each of the second protrusions 142 is configured to receive light from a respective second sub light source 112. As illustrated in Fig.
  • each second protrusion 142 is deployed at a same position as its respective second sub light source 112, which ensures a larger efficiency of light in-coupling from each second sub light source 112 into the respective second protrusion 142 and gives a minimum loss of light across the whole light entrance surface 121 of the first lens 12.
  • the left light exit face of the second protrusion 142 is set to be 1 to 4 times larger than the right light entrance face of the second protrusion 142, a maximum efficiency of light in-coupling can be obtained from the second sub light source 112 into the respective second protrusion 142.
  • first light sources 111 being one
  • second light sources 112 being two
  • the number of the first light sources 111 or the second light sources 112 can be any other numbers as well, distributed for example in an array perpendicular to the optical axis L of the automotive lighting system 1.
  • the respective first and second protrusions 141, 142 can be provided across the light entrance surface 121 of the first lens 12 in a similar array distribution.
  • FIG. 2 an automotive lighting system according to another embodiment of the present invention is illustrated. Most of the components in the automotive lighting system 1 of Fig. 2 keep the same as in the automotive lighting system 1 of Fig. 1 , and thus the same reference numbers are used to indicate the same elements. Differences between the automotive lighting systems 1 of Fig. 1 and Fig. 2 are reflected in the following two aspects.
  • a third lens 15 is introduced, such as at an optically midway position between the first lens 12 and the second lens 13, which third lens 15 is configured to receive light from the first lens 12 and redirect it onto the second lens 13.
  • the third lens 15 With the incorporation of the third lens 15, more flexibility can be provided for example in shaping of the light beam as projected finally by the automotive lighting system 1 in front of the vehicle.
  • the light entrance surface 121 of the first lens 12 is symmetrically convex in the optically upstream direction, especially has its center C located at the optical axis L of the automotive lighting system 1. Furthermore, as seen in Fig. 2 , in a direction parallel to the optical axis L of the automotive lighting system, i.e., the horizontal direction in the drawing, the first light entrance face 1411 of the first protrusion 141 is located at the same position as the center C of the light entrance surface 121 of the first lens 12.
  • first light entrance face 1411 of the first protrusion 141 is spaced apart from the respective first sub light source 111 by such a distance that equals the one between the center C of the light entrance surface 121 of the first lens 12 and the respective second sub light source 112 located at the optical axis L of the automotive lighting system 1.
  • This kind of flush-positioned configuration between the center C of the light entrance surface 121 of the first lens 12 and the first light entrance face 1411 of the first protrusion 141 is helpful to keep the efficiency of light in-coupling to be uniform across the light entrance surface 121 of the first lens 12, and thus beneficial for obtaining a uniform intensity distribution in the final light pattern projected in front of the vehicle.
  • the flush-positioned configuration as mentioned above applies as well between the center C of the light entrance surface 121 of the first lens 12 and the light entrance face of the second protrusion 142, and no detailed explanation will be repeated herein for the sake of conciseness.
  • an automotive lighting system is proposed for use for example in a vehicle, according to a second aspect of the present invention.
  • Most of the components in the automotive lighting system 1 of Fig. 3 keep the same as in the automotive lighting system 1 of Fig. 1 , and thus the same reference numbers are used to indicate the same elements, such as the first protrusion 141 at a periphery of the light entrance surface 121 of the first lens 12.
  • Differences between the automotive lighting systems 1 of Fig. 1 and Fig. 3 lie in the following two aspects.
  • a third lens 15 is introduced, such as at an optically midway position between the first lens 12 and the second lens 13.
  • the third lens 15 in the automotive lighting system 1 of Fig. 3 is configured as well to receive light from the first lens 12 and redirect it onto the second lens 13, thus enabling greater flexibility in for example beam shaping of the final light pattern projected in front of the vehicle.
  • the two adjacent protrusions i.e ., the first protrusion 141 and the second protrusion 142 are closely positioned such that there is a partial overlapping between light exit faces thereof.
  • the first protrusion 141 in the automotive lighting system 1 of Fig. 3 comprises a first light entrance face 1411 and a first light exit face 1412 as well.
  • the second protrusion 142 also comprises a second light entrance face 1421 and a second light exit face 1422, see Fig. 3 .
  • the partial overlapping it is the partial overlapping 1400 between the first light exit face 1412 of the first protrusion 141 and the second light exit face 1422 of the second protrusion 142.
  • the first light exit face 1412 of the first protrusion 141, the second light exit face 1422 of the second protrusion 142, and the partial overlapping 1400 therebetween are shown clearly in the automotive lighting system 1 of Fig. 3 . As depicted in Fig.
  • the first light exit face 1412 of the first protrusion 141 has an upper boundary at point a and a lower boundary at point c
  • the second light exit face 1422 of the second protrusion 142 has an upper boundary at point b and a lower boundary at point d, wherein the segment between points b and c acts as the partial overlapping 1400.
  • the partial overlapping 1400 as mentioned above between the first light exit face 1412 of the first protrusion 141 and the second light exit face 1422 of the second protrusion 142 is configured in such a way that the second lens 13 projects light from the first and second sub light sources 111, 112 on the road in front of the vehicle as a light pattern with a first maximum light intensity I max1 , a second maximum light intensity I max2 , and a minimum light intensity I min between the first maximum light intensity I max1 and the second maximum light intensity I max2 , where I min /I max1 > 90% and I min /I max2 > 90%, leading to a uniform distribution of light intensity across the final light pattern. Details about the final light pattern as projected by the automotive lighting system in front of the vehicle will be explained in the following with reference to Fig. 4 , where an example simulated result in the distribution of light intensity for the final light pattern are illustrated according to an embodiment of the present invention.
  • the final light pattern as projected by the second lens 13 from the first and second sub light sources 111, 112 comprises a first maximum light intensity I max1 and a second maximum light intensity I max2 , located respectively at points A and B.
  • I max1 maximum light intensity
  • I max2 maximum light intensity
  • there is also a minimum light intensity I min located at point C, where I min /I max1 > 90% and I min /I max2 > 90%.
  • a special overlapping is introduced between the first light exit face 1412 of the first protrusion 141 and the second light exit face 1422 of the second protrusion 142, as so to obtain an uniform superposition result between the two sub light patterns, leading to the final light pattern having two peaks I max1 , I max2 of light intensity around centers of the two sub light patterns and also a minimum light intensity I min between the two peaks I max1 , I max2 , which minimum light intensity I min is also larger than 90 percent of each peak I max1 , I max2 .
  • This perfect uniform distribution of light intensity in the final light pattern can be expressed as well by a special relationship between an average light intensity I ave within the pattern countour of the final light pattern (indicated for example by a dashed rectangle in Fig. 4 ) and the two peaks I max1 , I max2 of light intensity as mentioned above, for example by I ave /I max1 > 0.4 and I ave /I max2 > 0.4.
  • the partial overlapping 1400 between the first light exit face 1412 of the first protrusion 141 and the second light exit face 1422 of the second protrusion 142 is less than half of the first light exit face 1412 of the first protrusion 141, and also less than half of the second light exit face 1422 of the second protrusion 142.
  • the difference between the first or second maximum light intensity I max1 , I max2 and the minimum light intensity I min is greatly reduced, helping to provide the final light pattern projected by the automotive lighting system 1 in front of the vehicle with an even more uniform distribution of light intensity.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP20192564.1A 2020-07-30 2020-08-25 Systèmes d'éclairage pour phare de vèhicule Pending EP3961085A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP20192564.1A EP3961085A1 (fr) 2020-08-25 2020-08-25 Systèmes d'éclairage pour phare de vèhicule
EP21849047.2A EP4189280A1 (fr) 2020-07-30 2021-07-30 Système d'éclairage d'automobile
US18/018,828 US12018807B2 (en) 2020-07-30 2021-07-30 Automotive lighting system
CN202180066859.0A CN116324271A (zh) 2020-07-30 2021-07-30 机动车照明***
PCT/US2021/044038 WO2022026911A1 (fr) 2020-07-30 2021-07-30 Système d'éclairage d'automobile

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062105A1 (de) * 2000-12-13 2002-06-20 Hella Kg Hueck & Co Fahrzeugscheinwerfer
GB2412159A (en) * 2004-03-18 2005-09-21 Koito Mfg Co Ltd Vehicle headlamp unit with elliptical lens and conical reflector surrounding a light emitting chip
DE102009053581B3 (de) * 2009-10-05 2011-03-03 Automotive Lighting Reutlingen Gmbh Lichtmodul für eine Beleuchtungseinrichtung eines Kraftfahrzeugs
EP2743567A1 (fr) * 2012-12-14 2014-06-18 Valeo Vision Elément optique primaire, module d'éclairage et projecteur pour véhicule automobile
EP3147557A1 (fr) * 2015-09-28 2017-03-29 Valeo Vision Element optique primaire pour module lumineux de vehicule automobile
EP3301347A1 (fr) * 2016-09-29 2018-04-04 Valeo Vision Dispositif d'éclairage pour véhicule automobile comportant un guide de lumière
WO2020083711A1 (fr) * 2018-10-25 2020-04-30 Valeo Vision Module lumineux pour dispositif d'eclairage de vehicule

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062105A1 (de) * 2000-12-13 2002-06-20 Hella Kg Hueck & Co Fahrzeugscheinwerfer
GB2412159A (en) * 2004-03-18 2005-09-21 Koito Mfg Co Ltd Vehicle headlamp unit with elliptical lens and conical reflector surrounding a light emitting chip
DE102009053581B3 (de) * 2009-10-05 2011-03-03 Automotive Lighting Reutlingen Gmbh Lichtmodul für eine Beleuchtungseinrichtung eines Kraftfahrzeugs
EP2743567A1 (fr) * 2012-12-14 2014-06-18 Valeo Vision Elément optique primaire, module d'éclairage et projecteur pour véhicule automobile
EP3147557A1 (fr) * 2015-09-28 2017-03-29 Valeo Vision Element optique primaire pour module lumineux de vehicule automobile
EP3301347A1 (fr) * 2016-09-29 2018-04-04 Valeo Vision Dispositif d'éclairage pour véhicule automobile comportant un guide de lumière
WO2020083711A1 (fr) * 2018-10-25 2020-04-30 Valeo Vision Module lumineux pour dispositif d'eclairage de vehicule

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