EP3812650A1 - Module d'éclairage pour phare de véhicule - Google Patents

Module d'éclairage pour phare de véhicule Download PDF

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Publication number
EP3812650A1
EP3812650A1 EP19205348.6A EP19205348A EP3812650A1 EP 3812650 A1 EP3812650 A1 EP 3812650A1 EP 19205348 A EP19205348 A EP 19205348A EP 3812650 A1 EP3812650 A1 EP 3812650A1
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EP
European Patent Office
Prior art keywords
focal
light
light source
focal plane
lighting module
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
EP19205348.6A
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German (de)
English (en)
Inventor
designation of the inventor has not yet been filed The
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Lumileds Holding BV
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Lumileds Holding BV
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Filing date
Publication date
Application filed by Lumileds Holding BV filed Critical Lumileds Holding BV
Priority to EP19205348.6A priority Critical patent/EP3812650A1/fr
Publication of EP3812650A1 publication Critical patent/EP3812650A1/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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • 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
    • F21S41/265—Composite lenses; Lenses with a patch-like 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
    • 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
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • 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
    • 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
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs

Definitions

  • the present invention relates to the field of automotive front-lighting, and particularly to a lighting module for a vehicle headlight.
  • Bi-function Poly-Ellipsoidal System (PES) solution for a headlamp has been widely used in automotive lighting today.
  • an opaque shutter is utilized in this solution such that switching between a high beam (also known as an upper beam) and a low beam (also known as a lower beam) is enabled.
  • a high beam also known as an upper beam
  • a low beam also known as a lower beam
  • a dark area exists in the final projected beam pattern, especially between the high beam and the low beam.
  • CN108644739A aims to provide more design freedom in placing low beam and high beam LEDs in vehicle headlights, and relates to a module comprising a low beam LED, a low beam reflector, a high beam LED, a high beam reflector, and a multi-focal lens, wherein the multi-focal lens comprises a first light incident plane with a focal point F1 and a second light incident plane with a focal point F2, and wherein light from the low beam LED is incident onto the focal point F1, but light from the high beam LED is incident onto the focal point F2.
  • the present invention provides a lighting module for a vehicle headlight, so as to eliminate or at least alleviate one or more of the above mentioned disadvantages.
  • a lighting module for use in a vehicle headlight.
  • the lighting module comprises a first light source, a first primary optics, and a multi-focal secondary optics.
  • the multi-focal secondary optics comprises different focal planes, in particular, a first focal plane and a second focal plane, wherein the first focal plane comprises a first focal point and the second focal plane comprises a second focal point.
  • the first primary optics is configured to receive and redirect a first part of light from the first light source to the first focal plane, especially to a first focal area on the first focal plane. Further, the first primary optics is also configured to receive and redirect a second part of the light from the first light source to the second focal plane, specifically a first focal area on the second focal plane.
  • the two parts (i.e., the first and second parts) of light from the first light source is received and redirected further by the multi-focal secondary optics onto a road in front of the vehicle.
  • the first light source comprises a low beam light source, which low beam light source is configured to generate a low beam having a bright/dark cut-off line, for example after redirection by the first primary optics and the multi-focal secondary optics.
  • the first primary optics is configured in such a way that the first part of light from the low beam light source is redirected onto the first focal area centered above the first focal point on the first focal plane, and the second part of light from the low beam light source is redirected onto the first focal area centered below the second focal point on the second focal plane.
  • the light from the first focal area on the first focal plane i.e ., the first part of light coming originally from the low beam light source
  • the light from the first focal area on the second focal plane i.e., the second part of light coming originally from the low beam light source
  • the light from the first focal area on the second focal plane is projected as a second part of the low beam above the bright/dark cut-offline.
  • the low beam light source is split into two parts, both of which are incident onto the respective primary optics, i.e., the first primary optics as indicated above.
  • the two parts of light coming from the low beam light source (also recited as low beam light hereinafter) is redirected by the first primary optics onto different focal areas respectively.
  • the first part of low beam light is redirected onto the first focal area on the first focal plane of the secondary optics, while the second part of low beam light is redirected onto the first focal area on the second focal plane of the secondary optics.
  • the two parts of low beam light are then incident onto the multi-focal secondary optics located at an optically downstream position, and projected thereby onto the road in front of the vehicle, thus providing the final low beam pattern for the vehicle or a driver in the vehicle.
  • the final low beam pattern projected onto the road in front of the vehicle comprises the bright/dark cut-offline.
  • the first focal area is centered above the first focal point, meaning that after redirection by the first primary optics, the first part of low beam light is incident onto an area centered above the first focal point on the first focal plane of the multi-focal secondary optics.
  • the first part of low beam light will be projected as the first, main part of the low beam pattern, which is located below the bright/dark cut-offline.
  • the first focal area is centered below the second focal point, meaning that after redirection by the first primary optics, the second part of low beam light is incident onto an area centered below the second focal point on the second focal plane of the multi-focal secondary optics.
  • the second part of low beam light will be projected as the second, additional part of the low beam pattern, which is located above the bright/dark cut-off line.
  • a shutter is also comprised, which shutter is configured to help generating the bright/dark cut-offline of the low beam pattern.
  • the bright/dark cut-off line is generated in connection with the first part of low beam light.
  • the shutter can be provided close to the first focal point on the first focal plane of the multi-focal secondary optics, such that the bright/dark cut-offline is generated together with the first, main part of the final low beam pattern located below the bright/dark cut-offline.
  • the shutter comprises a transparent shutter, formed for example by polymethyl methacrylate (PMMA), making it not an obstruction in propagation of light incident thereon from another light source as e.g. a high beam light source.
  • PMMA polymethyl methacrylate
  • the lighting module proposed by an optional embodiment of the present invention, there are also a second light source and a corresponding second primary optics.
  • the second light source comprises a high beam light source, such that together with the above mentioned low beam light source, a high beam pattern can be also projected onto the road in front of the vehicle.
  • the lighting module as proposed by the present embodiment comprises now two separate light sources, i.e., the low beam light source and the high beam light source, for the purpose of projecting the low beam pattern and the high beam pattern respectively onto the road in front of the vehicle.
  • the multi-focal secondary optics of the lighting module comprises further a third focal point on a third focal plane, and also maybe a fourth focal point on a fourth focal plane.
  • the high beam light from the high beam light source is split into two parts as well, wherein the first part of high beam light is received and redirected (for example by means of total internal reflection) by the second primary optics onto a second focal area on the third focal plane, and the second part of high beam light is received and redirected by the second primary optics onto a second focal area on the fourth focal plane.
  • the two parts of high beam light are further redirected by the multi-focal secondary optics onto the road in front of the vehicle.
  • the second focal area is centered below the third focal point; and also on the fourth focal plane of the multi-focal secondary optics, the second focal area is centered close to the fourth focal point.
  • the first focal plane and the first focal point are coincident respectively with the third focal plane and the third focal point, meaning that the first focal plane coincides with the third focal plane, and also the first focal point coincides with the third focal point.
  • the first part of high beam light incident onto the second focal area of the third focal plane (namely, the first focal plane) is projected as a first, main part of the final high beam pattern, which will be located above the bright/dark cut-off line as opposite to the first main part of the low beam pattern.
  • the second part of high beam light incident onto the second focal area of the fourth focal plane it is then projected by the multi-focal secondary optics as a second, additional part of the final high beam pattern, which will be located close to the bright/dark cut-off line.
  • the final high beam pattern as obtained by the lighting module according to the present invention comprises also a second additional part close to the bright/dark cut-offline.
  • the additional part of high beam pattern helps to optimize and preferably avoid the otherwise existing dark area between the high beam pattern and the low beam pattern. In this way, any sudden change in light intensity between the high beam pattern and the low beam pattern projected in front of the vehicle can be smoothed, making the vehicle headlight obtained thereby to be more favored in practical applications.
  • the above proposed lighting module for a vehicle headlight comprises a multi-focal secondary optics having for example four focal planes with their respective focal points.
  • the multi-focal secondary optics in the above proposed lighting module can also comprise more or less focal planes.
  • only three focal planes with their respective focal points can be provided for the multi-focal secondary optics.
  • the first focal plane can be coincident with the third focal plane, and in the meanwhile, the first focal point may coincide with the third focal point as well.
  • the first part of low beam light and the first part of high beam light are both redirected onto the first focal plane of the multi-focal secondary optics, but onto different focal areas thereof.
  • the first part of low beam light is redirected by the first primary optics onto the first focal area centered especially above the first focal point of the first focal plane
  • the first part of high beam light is redirected by the second primary optics onto the second focal area centered especially below the first focal point of the first focal plane.
  • the first part of low beam light and the first part of high beam light are projected respectively below and above the bright/dark cut-offline in front of the vehicle. This helps to provide the multi-focal secondary optics with a simpler structure, making it beneficial in manufacture and processing.
  • the shutter especially, the transparent shutter of the lighting module is also integrated within the second primary optics.
  • the transparent shutter for generating the bright/dark cut-off line forms a single integral body with the second primary optics for receiving and redirecting light from the high beam light source, allowing a reduced number of components and a simplified structure in the lighting module.
  • the single integral body comprising both shutter and second primary optics can be also provided with a special portion, at which the second part of light from the first light source (for example the low beam light source) is received and redirected so as to reach the first focal area on the second focal plane. More preferably, this special portion of the single integral body comprises a patterned surface, where the second part of low beam light is incident onto the patterned surface and redirected thereby towards the first focal area on the second focal plane.
  • the first primary optics comprises a first reflective or refractive element. More preferably, the first reflective or refractive element comprises two portions for receiving and redirecting the two parts of low beam light respectively onto the first focal area of the first focal plane and the first focal area of the second focal plane.
  • the second primary optics comprises a second reflective or refractive element as well, which second reflective or refractive element also comprises two portions for receiving and redirecting the two parts of high beam light respectively onto the second focal area of the third focal plane and the second focal area of the fourth focal plane.
  • a reflector having two reflective sections can be used for the first reflective element, and so does the second reflective element.
  • a transparent shutter is comprised and also integrated with the second primary optics
  • a refractive body having a light input surface for receiving light from the second light source and a light output surface bonded with the transparent shutter can be used for the second refractive element.
  • the multi-focal secondary optics comprises a multi-focal projection lens having several lens portions, and each of the several lens portions comprises a respective focal point of the multi-focal secondary optics.
  • the multi-focal projection lens is provided with four focal planes having their respective focal points, there will be for example four lens portions, each of them having its respective focal plane and focal point.
  • the multi-focal projection lens comprises three lens portions accordingly, with each lens portion having its respective focal point on the respective focal plane.
  • the multi-focal projection lens comprises three lens portions, such as a first lens portion, a second lens portion, and a third lens portion.
  • the first lens portion comprises the first focal point on the first focal plane
  • the second lens portion comprises the second focal point on the second focal plane
  • the third lens portion comprises the third focal point on the third focal plane.
  • the multi-focal projection lens can be shaped into a plane-convex form, wherein the first lens portion is located at a center position, while the second lens portion and the third lens portion are disposed respectively at either side of the first lens portion.
  • the first light source is located in a focal plane of the first primary optics, and/or the second light source is located in a focal plane of the second primary optics.
  • the lighting module mainly comprises a first light source 11, a first primary optics 12, and a multi-focal secondary optics 13.
  • the first light source 11 is preferably disposed at a focal plane, such as a focal plane in the object space of the first primary optics 12. Then, light is emitted out from the first light source 11 and incident onto the first primary optics 12, which first primary optics 12 reflects the light incident thereon further towards the multi-focal secondary optics 13.
  • a focal plane such as a focal plane in the object space of the first primary optics 12.
  • light emitted by the first light source 11 can be divided into two parts, i.e., a first part 111 (shown by a dashed ellipse on the left side in the figure) and a second part 112 (shown by a dashed ellipse on the right side in the figure).
  • the first primary optics 12 comprises accordingly two portions, such as the left portion and the right portion separated by dashed line A-A' in the figure.
  • the first portion of the first primary optics 12 is configured to receive the first part 111 of light from the first light source 11
  • the second portion of the first primary optics 12 is configured to receive the second part 112 of light from the first light source 11.
  • the first light source 11 comprises a low beam light source so as to generate a low beam pattern for a vehicle comprising such a lighting module.
  • the first primary optics 12 of the lighting module comprises for example a reflective element, such as the reflector shown in Fig. 1 .
  • the first primary reflector may comprise two sections separated and contiguous by dashed line A-A'.
  • the first primary optics 12 may comprise a refractive element as well with for example two portions accordingly, as long as the two parts 111, 112 of light from the first light source 11 are received and redirected respectively.
  • the first primary optics 12 shall be encompassed within the scope of the present invention.
  • the multi-focal secondary optics 13 comprises several focal planes and thus several focal points, such as a first focal plane P1 and a first focal point F1 thereon, and also a second focal plane P2 and a second focal point F2 thereon. Furthermore, as shown by dashed ellipses in Fig. 1 , on the first focal plane P1 of the multi-focal secondary optics 13, there is a first focal area S11 which is centered above the first focal point F1, and also on the second focal plane P2 of the multi-focal secondary optics 13, there is a first focal area S21 which is centered below the second focal point F2.
  • first primary optics 12 such that the first part 111 of light from the first light source 11 can be received and redirected merely onto the first focal area S11 of the first focal plane P1, and that the second part 112 of light from the first light source 11 can be received and redirected merely onto the first focal area S21 of the second focal plane P2.
  • the lighting module proposed by the present invention or a vehicle headlight comprising the same, not only light coming from the first light source 11 (for example the low beam light source) is split into two parts 111, 112, but also these two parts 111, 112 of low beam light are redirected respectively onto focal areas S11, S12 of two different focal planes P1, P2 of multi-focal secondary optics 13, such as with the help of first primary optics 12.
  • the first light source 11 for example the low beam light source
  • the two parts 111, 112 of light coming originally from the low beam light source are incident onto two different sections of the multi-focal secondary optics 13 having the respective focal planes P1, P2 or focal points F1, F2, such as a first section between dashed line B-B' and dashed line C-C' and a second section under dashed line C-C' in the figure, where they are redirected further towards different areas on the road in front of the vehicle.
  • a shutter 14 can be comprised as well in the lighting module, such as for the purpose of helping to generate a bright/dark cut-off line of the low beam pattern.
  • the shutter is made of transparent material, such as polymethyl methacrylate (PMMA), and disposed right beneath the first focal point F1 of the first focal plane P1.
  • the first part 111 of light from the first, low beam light source will be projected below the bright/dark cut-offline, because in the object space of projection lens, the first part 111 of low beam light is focused onto the first focal area S11 above the first focal point F1, while the shutter 14 for generating the bright/dark cut-offline is located below the first focal point F1.
  • a first part LB1 of the low beam pattern below the bright/dark cut-off line is generated by the first part 111 of light from the first, low beam light source on the road in front of the vehicle.
  • the second part 112 of light coming from the first, low beam light source is redirected by the first primary reflector, especially its right section in the figure, onto the first focal area S21 centered below the second focal point F2 of the second focal plane P2.
  • this part of light from the first focal area S21 on the second focal plane P2 is incident onto a lower portion (i.e., the portion below dashed line C-C' in the figure) of the multi-focal secondary optics 13 and refracted thereby further towards an area above the bright/dark cut-offline in front of the vehicle, forming a second part LB2 of the low beam pattern above the bright/dark cut-offline.
  • the resulting low beam pattern comprising these two parts LB1, LB2 is clearly illustrated in the simulated results of Fig.
  • two sections of the primary reflector are used respectively to receive the two parts 111, 112 of low beam light, and to redirect them further towards two respective focal areas S11, S21 on two different focal planes P1, P2 of the multi-focal secondary optics 13.
  • the two parts 111, 112 of low beam light are projected respectively by the two portions, having the respective focal planes P1, P2 and focal points F1, F2, of secondary optics 13 towards two areas above and below the bright/dark cut-offline, thus forming together the final low beam pattern on the road in front of the vehicle.
  • more freedom can be provided in design or beam shaping of the final low beam pattern, as it is constituted now by two separate parts LB 1, LB2 propagating along two independent light paths within the lighting module or vehicle headlight comprising the same.
  • a lighting module according to another embodiment of the present invention is shown, where the same reference numerals are used to indicate the same components as in the lighting module of Fig. 1 .
  • the lighting module of Fig. 2 comprises also the first light source 11, the first primary optics 12, as well as the multi-focal secondary optics 13 having the first focal point F1 on the first focal plane PI and the second focal point F2 on the second focal plane P2.
  • extra components such as a second light source 15 and also a second primary optics 16, are comprised.
  • the second light source 15 is disposed at a focal plane, such as a focal plane in the object space, of the second primary optics 16, just like the first light source 11.
  • light emitted from the second light source 15, for example a high beam light source comprises two parts 151, 152 as well, which two parts 151, 152 are received and redirected by the second primary optics 16 respectively towards two focal areas on two focal planes of the multi-focal secondary optics 13.
  • the high beam light comprising the first part 151 and the second part 152, is redirected such as through total internal reflection by the second primary optics 16, which total internal reflection can occur one or more times according to the specific configuration of second primary optics 16.
  • the multi-focal secondary optics 13 of Fig. 2 comprises also two other focal planes P3, P4 and their respective focal points F3, F4.
  • the first part 151 of light from the high beam light source can be redirected by the second primary optics 16 to a second focal area S12 on the third focal plane P3 of the multi-focal secondary optics 13, while the second part 152 of light from the high beam light source can be redirected by the second primary optics 16 to a second focal area S40 on the fourth focal plane P4 of the multi-focal secondary optics 13.
  • the multi-focal secondary optics 13 comprises merely three focal planes, where the first focal plane P1 coincides with the third focal plane P3, i.e., the first focal point F1 coincides with the third focal point F3 as well.
  • the second focal area S12 where the first part 151 of high beam light is focused, is configured below the first and third focal point F1, F3.
  • the first part 151 of high beam light will be projected by the multi-focal secondary optics 13, especially by a portion thereof having the respective focal plane P3 and focal point F3 (such as the portion between dashed line B-B' and dashed line D-D' in the figure), towards an area above the bright/dark cut-offline, thus forming a first, main part HB1 of a high beam pattern in front of the vehicle.
  • the second part 152 of high beam light is received and redirected by the second primary optics 16 onto the second focal area S40 of the fourth focal plane P4, wherein the second focal area S40 is configured close to the fourth focal point F4 on the fourth focal plane P4, see for example the area S40 indicated by a dashed rectangle in Fig. 2 .
  • the second part 152 of high beam light is redirected further by the multi-focal secondary optics 13, especially by a portion thereof having the respective focal plane P4 and focal point F4 (such as the portion above dashed line D-D' in the figure), towards an area close to the bright/dark cut-offline.
  • the second part 152 of light from the second light source 15 contributes to generate a second, additional part of the high beam pattern close to the bright/dark cut-offline.
  • the final high beam pattern projected by the lighting module according to the above embodiment or a vehicle headlight comprising the same contains clearly two parts, i.e., the first part HB1 above the bright/dark cut-off line L and the second part HB2 close to the bright/dark cut-off line L.
  • a second, additional part HB2 of the high beam pattern is included especially close to the bright/dark cut-offline L in the final high pattern, in addition to the first, main part HB1 located above the bright/dark cut-offline L.
  • This additional part HB2 of high beam pattern is beneficial at least to the weakening of any dark area existing between the low beam and high beam patterns.
  • two separate parts HB1, HB2 propagating along two independent optical paths are included too in the final high beam pattern, rendering more freedom as well in design or beam shaping of the resulting high beam such that requirements are fulfilled according to practical implementations.
  • the second primary optics 16 shown in Fig. 2 comprises a refractive body
  • an alternative reflective element can be used as well for the purpose of receiving and redirecting light from the second light source 15 towards the respective focal areas S12, S40.
  • the second primary optics 16 may comprise a reflector as well, having for example two sections being contiguous to each other and configured to redirect the two respective parts 151, 152 of light from the second light source 15.
  • the present invention shall encompass all these alternatives suitable for the receipt and redirection of light from the second light source 15.
  • a lighting module according to still another embodiment of the present invention is shown, where the same reference numerals are used to indicate the same components as in the lighting modules of Fig. 1 and Fig. 2 .
  • the second part 152 of light from the second light source 15, and accordingly the fourth focal plane P4, the forth focal point F4, and the second focal area F40 thereon have been omitted, but this should never be considered as a limitation to the present invention.
  • the lighting module of Fig. 3 comprises a single integral body 17 consisting for example of the second primary optics and the transparent shutter as indicated above.
  • the transparent shutter can be integrated with the second primary optics, for example at a surface of the second primary optics where light is otherwise output therefrom, such as at the upper-right surface in the figure. In this case, fewer components are used in the lighting module, leading to a simpler structure and reduced manufacturing cost.
  • the single integral body 17 comprises a portion, for example an upper-left portion in the figure, at which portion the second part 112 of light from the first light source 11 is incident and refracted properly towards the second focal area S21 on the second focal plane P2.
  • the above mentioned portion of the single integral body 17 is provided further with a patterned surface 170, where the second part 112 of light from the first light source 11 is incident thereon.
  • the patterned surface 170 helps to facilitate the correct receipt and further redirection of second part 112 of low beam light towards the second focal area S21 on the second focal plane P2, and in the meanwhile, to reduce potential loss of second part 112 of low beam light due to such receipt and redirection.
  • patterned surface 170 of the single integral body 17 is shown in Fig. 3 as a step surface, this is merely provided to explain rather than limit the present invention. Having benefitted from teachings of the present invention, a skilled person in the art shall easily conceive any other suitable shapes of the patterned surface 170, such as a sawtooth form.

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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)
EP19205348.6A 2019-10-25 2019-10-25 Module d'éclairage pour phare de véhicule Pending EP3812650A1 (fr)

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EP19205348.6A EP3812650A1 (fr) 2019-10-25 2019-10-25 Module d'éclairage pour phare de véhicule

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114110528A (zh) * 2021-12-03 2022-03-01 苏州晶清光电科技有限公司 照明灯具及其使用方法
WO2023019640A1 (fr) * 2021-08-20 2023-02-23 华域视觉科技(上海)有限公司 Module d'éclairage de phare de véhicule intégré de feux de route et de croisement adb et phare de véhicule

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69012391T2 (de) * 1989-03-31 1995-02-02 Ichiko Industries Ltd Scheinwerfer nach dem Projektionsprinzip für Kraftfahrzeuge.
US20110205748A1 (en) * 2010-02-24 2011-08-25 Yasushi Yatsuda Vehicle light and multi-focal lens
JP2011243474A (ja) * 2010-05-20 2011-12-01 Koito Mfg Co Ltd 車両用照明灯具
JP2015076243A (ja) * 2013-10-08 2015-04-20 市光工業株式会社 車両用照明灯具
CN106813176A (zh) * 2015-11-27 2017-06-09 欧司朗有限公司 一种车前灯
CN108644739A (zh) 2018-04-24 2018-10-12 广州市佛达信号设备有限公司 一种远近光多焦点透镜及模组

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69012391T2 (de) * 1989-03-31 1995-02-02 Ichiko Industries Ltd Scheinwerfer nach dem Projektionsprinzip für Kraftfahrzeuge.
US20110205748A1 (en) * 2010-02-24 2011-08-25 Yasushi Yatsuda Vehicle light and multi-focal lens
JP2011243474A (ja) * 2010-05-20 2011-12-01 Koito Mfg Co Ltd 車両用照明灯具
JP2015076243A (ja) * 2013-10-08 2015-04-20 市光工業株式会社 車両用照明灯具
CN106813176A (zh) * 2015-11-27 2017-06-09 欧司朗有限公司 一种车前灯
CN108644739A (zh) 2018-04-24 2018-10-12 广州市佛达信号设备有限公司 一种远近光多焦点透镜及模组

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023019640A1 (fr) * 2021-08-20 2023-02-23 华域视觉科技(上海)有限公司 Module d'éclairage de phare de véhicule intégré de feux de route et de croisement adb et phare de véhicule
CN114110528A (zh) * 2021-12-03 2022-03-01 苏州晶清光电科技有限公司 照明灯具及其使用方法

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