EP4206524A1 - Optisches reflexionssystem für fahrzeuglampenbeleuchtungsvorrichtung und fahrzeuglampenbeleuchtungsvorrichtung - Google Patents

Optisches reflexionssystem für fahrzeuglampenbeleuchtungsvorrichtung und fahrzeuglampenbeleuchtungsvorrichtung Download PDF

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Publication number
EP4206524A1
EP4206524A1 EP21957181.7A EP21957181A EP4206524A1 EP 4206524 A1 EP4206524 A1 EP 4206524A1 EP 21957181 A EP21957181 A EP 21957181A EP 4206524 A1 EP4206524 A1 EP 4206524A1
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EP
European Patent Office
Prior art keywords
reflector
light
optical
reflecting
reflecting surface
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
EP21957181.7A
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English (en)
French (fr)
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EP4206524A4 (de
Inventor
Jie Zhang
Jiayuan Chen
Shikun DONG
Hao Zhou
Wenhui SANG
He ZHU
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HASCO Vision Technology Co Ltd
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HASCO Vision Technology Co Ltd
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Publication date
Application filed by HASCO Vision Technology Co Ltd filed Critical HASCO Vision Technology Co Ltd
Publication of EP4206524A1 publication Critical patent/EP4206524A1/de
Publication of EP4206524A4 publication Critical patent/EP4206524A4/de
Pending legal-status Critical Current

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    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated

Definitions

  • the present disclosure relates to a vehicle lamp illumination device, and specifically, the present disclosure relates to an optical reflecting system for a vehicle lamp illumination device and a vehicle lamp illumination device.
  • patent application CN 1 07208859A discloses an illumination device, wherein this illumination device has at least one preferably aspherical collimating lens.
  • patent application CN212618084U discloses a bidirectional collimating lens and a vehicle lamp system thereof.
  • a curved surface on the collimating lens is a revolving curved surface based on an optical axis of the lens, and the collimating lens has isotropic imaging characteristic.
  • the illumination light pattern of the vehicle lamp illumination device is anisotropic, for example, a small up-down illumination angle and a large left-right illumination angle are required for a low-beam illumination light pattern.
  • the vehicle lamp illumination device based on the collimating lens needs to form a basic light pattern with a certain width through an additional optical system, then the basic light pattern is imaged to a road surface through the collimating lens, which makes the vehicle lamp illumination device relatively complex in structure.
  • the existing vehicle lamp systems using a bidirectional collimating lens as the optical collimating element as a certain distance exists between a light incident surface and a light emergent surface of the bidirectional collimating lens, that is, the lens has a certain thickness, when an aspect ratio (length-width ratio) of the light pattern that needs to be formed is set to be a relatively large value, a focal length of the light incident surface and a focal length of the light emergent surface have a relatively large difference.
  • the bidirectional collimating lens is generally formed by injection molding of transparent plastic, and the thicker the thickness is, the longer the process time for the injection molding is, so that the production rate is slowed down, and it is not conducive to mass production.
  • the optical collimating element of the vehicle lamp illumination device needs to be improved, so as to overcome or alleviate all or at least part of the above technical problems.
  • Exemplary embodiments of the present disclosure provide an optical reflecting system.
  • the optical reflecting system is used for a vehicle lamp illumination device, the vehicle lamp illumination device may include a primary optical system having a light source, and the optical reflecting system can be configured to reflect light emitted from the light source of the primary optical system, wherein the optical reflecting system may include a first reflector having a first reflecting surface and a second reflector having a second reflecting surface, the first reflecting surface may be configured to collimate light in a first direction, and the second reflecting surface may be configured to collimate light in a second direction orthogonal to the first direction, the first reflecting surface and the second reflecting surface may have a curved shape represented by a contour line, the first reflecting surface and the second reflecting surface each may be a curved surface formed by stretching corresponding contour line along a direction normal to a plane where the contour line is located, the optical reflecting system can be configured such that light beams emitted from the primary optical system having the light source, after being reflected by the first reflector and reflected by the second reflector,
  • the contour line may include a parabola or a quasi-parabola.
  • the first direction may be a horizontal direction or a vertical direction.
  • a shape of the contour line of each of the first reflecting surface and the second reflecting surface may be set such that a light diffusion angle of light beams obtained after being reflected by each of the first reflecting surface and the second reflecting surface changes as the shape of the contour line of each of the first reflecting surface and the second reflecting surface changes.
  • a focal length of the first reflecting surface may be configured to be different from a focal length of the second reflecting surface.
  • the first reflector and the second reflector may be adjacently provided on the same side of the light source, or the first reflector and the second reflector may be provided at two opposite sides of the light source.
  • the primary optical system may be a primary optical system having a cut-off line structure, and a focal point of the optical reflecting system may be provided at the cut-off line structure.
  • the first reflector may include a plurality of first reflecting surfaces
  • the optical reflecting system may be configured such that light beams emitted from the primary optical system having the light source, after being reflected by the first reflector and reflected by the second reflector, may be emitted in a form of approximately parallel light beams, so as to form a matrix illumination light pattern of the vehicle lamp illumination device.
  • the first reflecting surface and the second reflecting surface of the optical reflecting system may be formed by plating with a plating material.
  • the plating material of the first reflecting surface and the second reflecting surface may be at least one of aluminum, chromium, nickel, silver, and gold.
  • the first reflector and the second reflector may be separately manufactured and assembled in place in the vehicle lamp illumination device by fastening connectors.
  • the first reflector and the second reflector may be integrally molded.
  • the primary optical system may include a third reflector, and the third reflector is configured to reflect light from the light source and guide the same to the optical reflecting system.
  • the primary optical system may include a condenser
  • the condenser may be configured to collimate and converge light from the light source and guide the same to the optical reflecting system, and a cut-off line structure may be provided at a lower edge of the condenser.
  • the optical reflecting system may include an additional fourth reflector, and the first reflector, the second reflector, and the fourth reflector may be configured to jointly form a focal point or a focusing area of the optical reflecting system.
  • the present disclosure provides a vehicle lamp illumination device including the above optical reflecting system.
  • the optical reflecting system including two reflectors according to the present disclosure may collimate and converge the light beams from the light source in two directions orthogonal to each other.
  • the optical reflecting system of the present disclosure has a simple and compact structure design, is easy to manufacture, further improves the production efficiency, and has significant cost effectiveness.
  • the vehicle lamp illumination device including the optical reflecting system of the present disclosure
  • an illumination light pattern with a relatively large aspect ratio may be realized.
  • the first reflector and the second reflector of the optical reflecting system of the present disclosure may be constructed relatively independently, with high design flexibility, and the light path direction and diffusion range of the light beams may be effectively controlled, so that an ideal illumination light pattern may be obtained according to needs, and meanwhile, the light distribution requirements of the national standard GB25991-2010 for vehicle lamp illumination devices may be met.
  • a vehicle lamp illumination device in particular a headlamp of a vehicle, usually includes a primary optical system having a light source and an optical collimating element so as to achieve a satisfactory illumination light pattern.
  • a bidirectional collimating lens is used as an optical collimating element, but in cases where the vehicle lamp illumination device needs to obtain an illumination light pattern having a relatively large aspect ratio, the bidirectional collimating lens is generally manufactured to have a large volume and a relatively heavy weight, thereby resulting in low production efficiency and a relatively high cost.
  • the present disclosure provides an optical reflecting system for a vehicle lamp illumination device, and an exemplary embodiment of the vehicle lamp illumination device having the optical reflecting system according to the present disclosure is described below with reference to FIG. 1 .
  • FIG. 1 is a schematic diagram of a vehicle lamp illumination device according to an exemplary embodiment of the present disclosure, with the vehicle lamp illumination device including a primary optical system and an optical reflecting system.
  • the primary optical system has a light source 80, and the optical reflecting system is configured to reflect light of the light source 80 emitted via the primary optical system.
  • the primary optical system may include a third reflector 70, and light beams emitted from the light source 80, after being reflected by the third reflector 70, can be received and reflected by the optical reflecting system to form an illumination light pattern of the vehicle lamp illumination device.
  • the third reflector 70 in the primary optical system may be a paraboloid or paraboloid-like reflecting mirror, and a focal point of the optical reflecting system may be provided on a reflecting surface of the third reflector 70.
  • the optical reflecting system includes a first reflector having a first reflecting surface 10 and a second reflector having a second reflecting surface 20.
  • the first reflecting surface 10 is configured to collimate light in a first direction
  • the second reflecting surface 20 is configured to collimate light in a second direction orthogonal to the first direction.
  • the first reflecting surface 10 and the second reflecting surface 20 have a curved shape represented by a contour line.
  • the first reflecting surface 10 and the second reflecting surface 20 are each a curved surface formed by stretching corresponding contour line along a direction normal to a plane where the contour line is located.
  • the optical reflecting system is configured such that light emitted from the primary optical system having the light source, after being reflected by the first reflector and the second reflector, is emitted in a form of approximately parallel light beams, so as to form the illumination light pattern of the vehicle lamp illumination device.
  • the "light source” may denote, in particular, a source of light (e.g., a light-emitting device or apparatus).
  • the light source may be a light-emitting diode (LED) that emits light when activated.
  • the light source may be substantially any light source or light emitter, which includes but is not limited to the light-emitting diode (LED), the laser, the fluorescent lamp, the incandescent lamp, etc.
  • the primary optical system is configured to receive light from the light source and to guide and transmit the received light so as to form primary light distribution, and the primary light distribution forms a desired illumination light pattern after being projected by the optical reflecting system.
  • the first reflector may be a first reflecting mirror and the second reflector may be a second reflecting mirror.
  • either of the first reflector and the second reflector may be paraboloidal reflector.
  • the "paraboloidal reflector” means, in particular, a reflector having a reflecting surface with a cross-sectional shape that is paraboloidal in profile, wherein the reflecting surface is a curved surface formed by stretching a parabola along a direction normal to a plane where the parabola is located.
  • a generatrix forming the reflecting surface is a parabola
  • the reflecting surface of the paraboloidal reflector is a paraboloid formed by unidirectionally stretching a parabola.
  • Each section line of the reflecting surface taken along a plane perpendicular to a stretching direction is corresponding to one focal point, and the reflecting surface is corresponding to one focal line.
  • the illumination light pattern formed by the optical reflecting system shown in FIG. 1 may be a high-beam illumination light pattern having a central maximum value as shown in FIG. 7 .
  • the focal point of the optical reflecting system shown in FIG. 1 can be arranged on the reflecting surface of the third reflector 70, so as to form the high-beam light pattern as shown in FIG. 7 , and the high-beam illumination light pattern has a light intensity central position (generally, a light-intensity central maximum value region), so as to comply with the light distribution requirement of having sufficiently large luminous intensity for high beam (referring to relevant regulations of national standard "Automobiles Headlamps with LED light sources and/or LED modules" ( GB25991-2010 )).
  • FIG. 2 shows a schematic diagram of a light path of the single rotating paraboloidal reflector.
  • This single rotating paraboloidal reflector 50 is an axisymmetric secondary-curved reflecting mirror, and when the light source is located at a focal point 501, light beams emitted from the light source are reflected by the rotating paraboloidal reflector 50 to obtain parallel light beams.
  • FIG. 3 shows a schematic diagram of a light path of the optical reflecting system having the first reflector and the second reflector according to an exemplary embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of a light path of light beams of the optical reflecting system in FIG. 3 in a vertical direction according to an exemplary embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a light path of light beams of the optical reflecting system in FIG. 3 in a horizontal direction according to an exemplary embodiment of the present disclosure.
  • the light beams are collimated in two directions that are generally orthogonal to a propagation direction of the light beams.
  • two collimating directions are orthogonal to each other.
  • the light beams can be collimated in a horizontal direction (e.g., x-y plane of coordinate system shown in FIG. 4 ) and in a vertical direction (e.g., z-direction).
  • the horizontal direction and the vertical direction can be determined with respect to an arbitrary frame of reference, and the parallel light beams provided by the optical reflecting system are referred to as being horizontally collimated and vertically collimated.
  • first direction being the horizontal direction and the second direction being the vertical direction (i.e., the first reflecting surface 10 is configured to collimate the light beams in the horizontal direction and the second reflecting surface 20 is configured to collimate the light beams in the vertical direction).
  • collimation in the horizontal direction can in particular mean that, with reference to FIG. 5 , the first reflecting surface 10 exerts a convergence effect on the light beams in a horizontal section (i.e., a section taken along the horizontal direction), that is, being capable of having a certain collimating effect on the light beams, and compared with FIG.
  • the first reflecting surface 10 has no collimating effect on the light beams in a vertical section (i.e., a section taken along the vertical direction) (a section curve of the first reflecting surface 10 in the section taken along the vertical direction is a straight line), and the first reflecting surface 10 has a collimating effect on the light beams in a single direction within a horizontal sectional range, that is to say, a collimating direction of the first reflecting surface 10 is limited in the horizontal direction.
  • Colllimation in the vertical direction can in particular mean that, with reference to FIG. 4 , the second reflecting surface 20 exerts a convergence effect on the light beams in a vertical section, that is, being capable of having a certain collimating effect on the light beams, and compared with FIG.
  • the second reflecting surface 20 has no collimating effect on the light beams in a horizontal section, and the second reflecting surface 20 has a collimating effect on the light beams in a single direction within a vertical sectional range, that is to say, a collimating direction of the second reflecting surface 20 is limited in the vertical direction.
  • the second reflecting surface 20 has an optical characteristic of unidirectionally collimating the light beams emitted from the light source similar to that of the first reflecting surface 10.
  • the first reflecting surface 10 of the optical reflecting system can be configured to be capable of collimating light in the horizontal direction (see FIG. 5 ), and the second reflecting surface 20 can be configured to collimate light in the vertical direction (see FIG. 4 ).
  • a focal length of the first reflecting surface 10 is smaller than a focal length of the second reflecting surface 20, according to the principle that the larger the focal length is, the smaller the formed image is, the optical reflecting system shown in FIG.
  • the LED light-emitting chip of 1 mm x 1 mm is placed at a focal point of the single rotating paraboloid (such as a single rotating paraboloid 50 shown in FIG. 2 ) to form a square light spot as shown in FIG. 31 .
  • the LED light-emitting chip of 1 mm x 1 mm is placed at a focal point of a bidirectional collimating optical reflecting system shown in FIG.
  • a rectangular asymmetric light spot shown in FIG. 32 is formed, and as the focal length of the first reflecting surface is smaller than that of the second reflecting surface, the length of the light spot shown in FIG. 32 in the horizontal direction is greater than that in the vertical direction.
  • the first reflecting surface 10 is a curved surface formed by stretching a paraboloid-shaped generatrix (a first contour line 15) along a direction (a first stretching direction A) normal to a plane where the generatrix is located
  • the second reflecting surface 20 is a curved surface formed by stretching a paraboloid-shaped generatrix (a second contour line 25) in a direction (a second stretching direction B) normal to a plane where the generatrix is located.
  • the generatrix of the first reflecting surface 10 of the first reflector is the first contour line
  • the generatrix of the second reflecting surface 20 of the second reflector is the second contour line 25
  • the direction normal to the plane where the first contour line 15 of the first reflecting surface 10 is located is the first stretching direction A, that is, the plane where the first contour line 15 of the first reflecting surface 10 is located is perpendicular to the first stretching direction A.
  • the direction normal to the plane where the second contour line 25 of the second reflecting surface 20 of the second reflector is located is the second stretching direction B, that is, the plane where the second contour line 25 of the second reflecting surface 20 is located is perpendicular to the second stretching direction B.
  • the second reflecting surface 20 has one focal line, and an intersection point of a vertical plane passing through a focal point 300 of the optical reflecting system and the focal line of the second reflecting surface 20 is a first focal point 200, the focal point 300 of the optical reflecting system and the first focal point 200 of the second reflecting surface 20 can be mirrored about a first stretching guide line 101 (see FIG. 4 ), and the first stretching guide line 101 is an intersection line of the vertical plane passing through the focal point 300 of the optical reflecting system and the first reflecting surface 10.
  • a position of the focal point 300 of the optical reflecting system can be adjusted by adjusting a position of the first stretching guide line 101 with respect to the first focal point 200 of the second reflecting surface.
  • the position of the focal line of the second reflecting surface can be determined.
  • a connecting line between the focal point 300 of the optical reflecting system and the first focal point 200 of the second contour line of the second reflecting surface 20 and the first stretching guide line 101 can form an angle b. Therefore, the angle b can be changed by changing a position of the first reflecting surface 10, so as to adjust the position of the focal point 300 of the optical reflecting system.
  • the contour line of each reflecting surface may include a parabola or a quasi-parabola.
  • the first contour line of the first reflecting surface 10 and the second contour line of the second reflecting surface 20 are both parabolas. If the light source is arranged at the focal point 300 of the optical reflecting system, the light beams emitted from the light source can achieve collimation in the horizontal direction after being reflected by the first reflecting surface 10, and then can achieve collimation in the vertical direction after being reflected by the second reflecting surface 20.
  • FIG. 8A is a schematic diagram of a light path of light beams of the optical reflecting system in the vertical direction according to another exemplary embodiment of the present disclosure
  • FIG. 8B is a schematic diagram of a light path of light beams of the optical reflecting system in the horizontal direction according to another exemplary embodiment of the present disclosure.
  • the first contour line of the first reflecting surface 10 may be a quasi-parabola
  • the second contour line of the second reflecting surface 20 may be a parabola.
  • Shapes of the contour lines of the reflecting surfaces of the reflectors are configured such that the light beams reflected by the reflecting surfaces exhibit a light diffusion angle.
  • the optical reflecting system is configured such that parallel light beams are converged to a line segment or an area near the line segment after being reflected by the first reflecting surface 10 and the second reflecting surface 20.
  • the light source is arranged near the focal point 300 of the optical reflecting system, i.e., the light beams emitted from the light source, after being reflected by the first reflecting surface 10
  • the diffusion angle in the horizontal direction is in a range between 5 ° and 60 °.
  • the shape of the contour line of each of the first reflecting surface and the second reflecting surface can be set such that the light diffusion angle of the light beams obtained after being reflected by each of the first reflecting surface and the second reflecting surface changes as the shape of the contour line of each of the first reflecting surface and the second reflecting surface changes. Therefore, by changing the shape of the first contour line of the first reflecting surface, the diffusion angle of the light beams reflected by the first reflecting surface in the horizontal direction can be adjusted, and/or by changing the shape of the second contour line of the second reflecting surface, the diffusion angle of the light beams reflected by the second reflecting surface in the vertical direction can be adjusted.
  • the shape of the contour line of one or both of the first reflecting surface and the second reflecting surface by changing the shape of the contour line of one or both of the first reflecting surface and the second reflecting surface, the light diffusion angle of the light beams reflected by corresponding reflecting surfaces can be adjusted. Therefore, the shapes of the first reflecting surface and the second reflecting surface can be separately set according to requirements of a light diffusion range of a specific illumination light pattern in the horizontal direction and the vertical direction, thus improving the design flexibility.
  • FIG. 9 to FIG. 11 are schematic diagrams of light paths of the optical reflecting system according to another exemplary embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of the light path of the optical reflecting system having the first reflector and the second reflector according to an exemplary embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of the light path of light beams of the optical reflecting system in FIG. 9 in the horizontal direction according to an exemplary embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of the light path of light beams of the optical reflecting system in FIG. 9 in the vertical direction according to an exemplary embodiment of the present disclosure.
  • the first reflecting surface 10 of the optical reflecting system shown in FIG. 9 is configured to be capable of collimating light in the vertical direction
  • the second reflecting surface 20 is configured to collimate light in the horizontal direction.
  • the optical reflecting system shown in FIG. 9 makes a degree of diffusion of the light beams in the horizontal direction smaller than a degree of diffusion in the vertical direction, and an illumination light pattern that is relatively narrow in the horizontal direction and relatively wide in the vertical direction can be obtained, that is, an illumination light pattern that is narrow left and right and wide up and down can be formed.
  • the focal length of the first reflecting surface can be set to be greater than the focal length of the second reflecting surface.
  • the optical reflecting system of the present disclosure by setting the focal length of the first reflecting surface of the first reflector to be different from the focal length of the second reflector, an illumination light pattern with a relatively large aspect ratio can be realized.
  • the first reflector and the second reflector of the optical reflecting system of the present disclosure can be constructed and arranged relatively independently, with high design flexibility, and the light path direction and diffusion range of the light beams in the horizontal direction and the vertical direction can be effectively controlled, so that an ideal illumination light pattern can be obtained according to needs, and meanwhile, the light distribution requirements of the national standard GB25991-2010 for vehicle lamp illumination devices can be met.
  • FIG. 12 is a schematic diagram of a light path of the vehicle lamp illumination device according to an exemplary embodiment of the present disclosure.
  • the primary optical system includes a light source 80 and a third reflector (e.g. third reflecting mirror) 701, the third reflector 701 of the primary optical system shown in FIG. 12 can be an ellipsoid or ellipsoid-like reflecting mirror, a light shielding plate is provided in front of the reflecting mirror, and the light shielding plate includes a cut-off line structure 60.
  • This cut-off line structure 60 is configured to form an illumination light pattern having a bright-dark cut-off line.
  • the focal point of the optical reflecting system can be disposed on the cut-off line structure 60, and the vehicle lamp illumination device correspondingly forms a low-beam illumination light pattern having the bright-dark cut-off line as shown in FIG. 6 .
  • the cut-off line structure 60 is provided between the third reflector 701 and the optical reflecting system including the first reflector and the second reflector.
  • the primary optical system is configured to substantially converge the light beams emitted from the light source 80 to the focal point or a focusing area of the optical reflecting system through the third reflector 701, and the focal point of the optical reflecting system can be provided on the cut-off line structure 60, such that the illumination light pattern having the bright-dark cut-off line can be formed.
  • FIG. 13 is a schematic diagram of a light path of the vehicle lamp illumination device according to another exemplary embodiment of the present disclosure, and as shown in FIG. 13 , in some embodiments according to the present disclosure, the primary optical system of the vehicle lamp illumination device includes a light source 80 and a condenser 702.
  • the condenser 702 may be a transparent light guide body, and the condenser 702 can be configured to receive light emitted from the light source 80, collimate and concentrate the received light, and guide it to the optical reflecting system.
  • a cut-off line structure 600 is provided at a lower edge of a light emergent surface of the condenser 702, the focal point of the optical reflecting system can be provided on the cut-off line structure 600, and the vehicle lamp illumination device shown in FIG. 13 can form the low-beam illumination light pattern having the bright-dark cut-off line as shown in FIG. 6 .
  • the bright-dark cut-off line refers to a dividing line where a significant change in brightness is visually perceived when light beams are transmitted to a light distribution screen. Therefore, by making the focal point of the optical reflecting system to be provided on the cut-off line structure 60 or 600, a low-beam illumination light pattern with a clear bright-dark cut-off line can be obtained. It can be seen from FIG.
  • a low-beam light pattern projected on the light distribution screen has an obvious bright-dark cut-off line, which complies with relevant regulations of the current national standard "Automobiles Headlamps with LED light sources and/or LED modules" ( GB25991-2010 ): there is no situation where multiple bright-dark cut-off lines are visually visible.
  • the vehicle lamp illumination device includes the primary optical system and the optical reflecting system, wherein the primary optical system includes a plurality of light sources 800 and the third reflector 703 having a plurality of reflecting surfaces, for example, this primary optical system includes 5 light sources 800 and the third reflector 703 having 5 reflecting surfaces.
  • the optical reflecting system includes the first reflecting surface 10 and the second reflecting surface 20, the focal point of the optical reflecting system can be provided on the third reflector 703 having 5 reflecting surfaces, and the vehicle lamp illumination device can form an ADB light patterns having five light spots, thus, high-beam ADB illumination is achieved.
  • the vehicle lamp illumination device may include the primary optical system and the optical reflecting system, wherein the primary optical system includes a plurality of light sources 800 and a third reflector 704 having a plurality of reflecting surfaces, and the optical reflecting system includes a plurality of first reflecting surfaces and one second reflecting surface 20.
  • the primary optical system includes 20 light sources 800 and the third reflector 704 having 20 reflecting surfaces, and the optical reflecting system includes four first reflecting surfaces 11, 12, 13, and 14 and one second reflecting surface 20.
  • the vehicle lamp illumination device shown in FIG. 15 can form an illumination area having 20 light spots (four groups in total, and five light spots in each group), and the 4 groups of illumination areas are superposed in an alternating manner to form an ADB light pattern with narrower pixels, so that the high-beam ADB illumination can be achieved and the control accuracy of the light pattern is higher.
  • the vehicle lamp illumination device shown in FIG. 15 can form multiple sets of matrix light patterns, and a plurality of pixels arranged side by side and connected to each other can be formed after the multiple sets of matrix light patterns are superposed, so that the control accuracy of the high-beam ADB light pattern is higher.
  • the primary optical system can be configured to cooperate with the optical reflecting system so as to form multiple sets of matrix illumination light patterns.
  • the vehicle lamp illumination device may include the primary optical system and the optical reflecting system, wherein the primary optical system may include the light source 800 and a third reflector 705, and a cut-off line structure 600 is formed at a lower boundary of the third reflector 705.
  • the optical reflecting system can include the first reflecting surface 10 and the second reflecting surface 20, and the focal point of the optical reflecting system can be provided on the cut-off line structure 600.
  • the vehicle lamp illumination device can form the low-beam illumination light pattern having the bright-dark cut-off line as shown in FIG. 6 .
  • the vehicle lamp illumination device of an exemplary embodiment of the present disclosure shown in FIG. 17 is substantially the same as the vehicle lamp illumination device of the exemplary embodiment of the present disclosure shown in FIG. 16 , except that the first reflecting surface 10 and the second reflecting surface 20 of the optical reflecting system of the vehicle lamp illumination device of the exemplary embodiment of the present disclosure shown in FIG. 17 are provided at different positions with respect to the light source.
  • both the first reflector and the second reflector can be provided on an upper side of the light source 800 in the vertical direction, and light is emitted from above the light source after being collimated and reflected by the first reflector and the second reflector. While in the embodiment shown in FIG.
  • both the first reflector and the second reflector can be provided on a lower side of the light source 800 in the vertical direction, and light is emitted below the light source after being collimated and reflected by the first reflector and the second reflector. Therefore, positions of the first reflector and the second reflector with respect to the light source can be designed according to a space inside a specific vehicle lamp body, thus increasing the adaptability of the vehicle lamp illumination device including the optical reflecting system and being applicable to various types of vehicle lamps.
  • two reflectors can be adjacently provided on the same side of the light source (see FIG. 12 or FIG. 13 ). In some embodiments, the two reflectors can be provided at two opposite sides of the light source (see FIG. 17 ), thereby significantly saving installation space, improving space utilization rate, reducing the overall size of the optical reflecting system, and thus greatly improving the applicability of the vehicle lamp illumination device including the optical reflecting system on vehicles.
  • relative positions of the first reflecting surface 10 of the first reflector and the second reflecting surface 20 of the second reflector in the optical reflecting system can be flexibly adjusted and changed, so as to better adapt to an installation space of the vehicle lamp illumination device.
  • the optical reflecting system for a vehicle lamp illumination device further may include a plurality of additional reflectors, for example, in some embodiments, the optical reflecting system further may include a fourth reflector configured to adjust parameters such as direction of light, and the fourth reflector includes a fourth reflecting surface 400.
  • the fourth reflector is a plane reflecting mirror configured to change only the light direction.
  • the fourth reflector also may be configured to be of a curved-surface shape, and the fourth reflector of a curved surface shape not only can change the light direction, but also can perform light distribution again on the light, so that the light pattern effect is better.
  • the light emitted from the light source can exit via the optical reflecting system along the light path direction.
  • the fourth reflector can be provided downstream of the light source and upstream of the first reflector along the light path direction and configured to receive light emitted from the light source of the primary optical system and reflect the received light to the first reflector.
  • the fourth reflector can be provided between the first reflector and the second reflector, and is configured to receive and reflect the light collimated by the first reflector to the second reflector, and the fourth reflector, as an additional light distribution element for further adjusting parameters such as the direction of the light, is conducive to re-distribution of the light collimated and reflected by the first reflector and then reflection of the light to the second reflecting mirror, so as to form an ideal illumination light pattern that meets the illumination requirements.
  • the fourth reflector can be provided downstream of the second reflector along the light path direction, that is, the fourth reflecting surface 400 of the fourth reflector can be provided downstream of the second reflecting surface 20 along the light path direction and configured to receive and reflect the light collimated and reflected by the second reflecting surface 20 to form the illumination light pattern. Therefore, the fourth reflector, as an additional light distribution element, is conducive to re-distribution of the light collimated and reflected by both the first reflector and the second reflector, so as to form the ideal illumination light pattern that meets the illumination requirements.
  • the optical reflecting system according to the above embodiments may include the first reflector, the second reflector, and the additional fourth reflector, wherein the first reflector, the second reflector, and the additional fourth reflector can be used to collectively form the focal point of the optical reflecting system.
  • an emergent direction of light emitted from the light source can be better adjusted through multi-level reflection, thereby better forming a desired light pattern.
  • the number of reflectors and the relative positions of various reflectors can be chosen according to the light pattern desired to be formed and light distribution requirements.
  • the vehicle lamp illumination device of an exemplary embodiment of the present disclosure having the light path shown in FIG. 15 is described with reference to FIG. 18 to FIG. 29 .
  • the vehicle lamp illumination device includes the primary optical system and the optical reflecting system, wherein the primary optical system includes the light source 800 and the third reflector 700 having a plurality of reflecting surfaces, and the optical reflecting system includes a plurality of first reflecting surfaces 10 (e.g. having 6 first reflecting surfaces) and one second reflecting surface 20.
  • the first reflecting surface 10 of the first reflector 110 is of a linear shape in a section taken along a longitudinal direction (a vertical direction) (see FIG. 28 ), and the first reflecting surface 10 of the first reflector 110 is of a parabola shape in a section taken along a transverse direction (a horizontal direction) (see FIG. 29 ).
  • the first reflecting surface 10 of the first reflector 110 has a curved shape characterized by a parabola, wherein the curved shape is a curved surface of the parabola which is stretched along a direction normal to a plane where the parabola is located. Therefore, the first reflector 110 is a paraboloidal reflector and is configured to collimate light in the horizontal direction.
  • the second reflector 210 includes the second reflecting surface 20.
  • the second reflecting surface 20 of the second reflector 210 is of a parabola shape in a section taken along a longitudinal direction (a vertical direction) (see FIG. 25 ), and the second reflecting surface 20 of the second reflector 210 is of a linear shape in a section taken along a transverse direction (a horizontal direction) (see FIG. 26 ).
  • the second reflecting surface 20 of the second reflector 210 has a curved shape characterized by a parabola, wherein the curved shape is a curved surface of the parabola which is stretched along a direction normal to a plane where the parabola is located. Therefore, the second reflector 210 is a paraboloidal reflector and is configured to collimate light in the vertical direction.
  • the optical reflecting system of the present disclosure has a simple and compact structure design, is easy to manufacture, further improves the production efficiency, and has significant cost effectiveness.
  • the first reflecting surface 10 of the first reflector 110 and the second reflecting surface 20 of the second reflector 210 of the optical reflecting system are achieved by plating with a plating material.
  • the first reflecting surface 10 and the second reflecting surface 20 are achieved by plating aluminum or silver.
  • the plating material of the first reflecting surface 10 of the first reflector 110 and the second reflecting surface 20 of the second reflector 210 of the optical reflecting system may include, but not limited to, aluminum, chromium, nickel, silver, and gold.
  • the first reflector 110 and the third reflector 700 can be formed as one piece, the first reflector 110 and the second reflector 210 are separately manufactured, and the first reflector 110 and the second reflector 210 are detachably assembled in place in the vehicle lamp illumination device by fastening connectors (for example, screws) 33.
  • the first reflector 110 and the second reflector 210 are assembled in place in the vehicle lamp illumination device by means of snap-fit connection, bonding, riveting, welding, etc., so as to ensure that the optical reflecting system, as a whole, is accurately positioned in a lamp body, is well fixed, and avoids movement.
  • the first reflector 110 and the second reflector 210 can be integrally formed. It should be appreciated that in some embodiments, various reflectors selected can be constructed in pairs as one piece depending on an actual lamp body space while meeting the illumination requirements.
  • the vehicle lamp illumination device further includes a circuit board 31 for installing the light source 800, the circuit board 31 is provided thereon with a radiator 32, the radiator 32 can improve heat dissipation performance of the circuit board 31, prevent the temperature of the light source 800 from being too high, and improve the stability of the light source 800.
  • the third reflector 700 provided below the light source of the primary optical system and the first reflector 110 having the first reflecting surface 10 form an integral structure, and the integral structure formed by the third reflector 700 and the first reflector 110 is connected to the second reflector 210 having the second reflecting surface 20, the circuit board 31, and the radiator 32 through the fastening connectors 33. Referring to exemplary light path diagram shown in FIG.
  • the light beams emitted from the light source 800 first are partially converged by the third reflector 700, after being reflected by the first reflecting surface 10 of the first reflector 110, collimation in the horizontal direction can be achieved, and after being reflected by the second reflecting surface 20 of the second reflector 210, collimation in the vertical direction can be achieved.
  • the focal length of the first reflecting surface 10 By setting the focal length of the first reflecting surface 10 to be different from the focal length of the first reflecting surface 20, an ideal illumination light pattern with a relatively large aspect ratio can be formed according to actual requirements.
  • the present disclosure provides the optical reflecting system for a vehicle lamp illumination device, wherein the optical reflecting system can realize collimation and convergence of light beams from the light source in two directions substantially orthogonal to each other.
  • the optical reflecting system of the present disclosure has a simple and compact structure design, is easy to manufacture, further improves production efficiency, and has significant cost effectiveness.
  • the vehicle lamp illumination device including the optical reflecting system of the present disclosure by setting the focal length of the first reflecting surface of the first reflector to be different from the focal length of the second reflector, the illumination light pattern having a relatively large aspect ratio can be obtained.
  • the optical reflecting system and the vehicle lamp illumination device in the present disclosure may be reproduced, and may be used in a variety of industrial applications.
  • the optical reflecting system in the present disclosure can be applied to vehicle lamp illumination devices that need to form an illumination light pattern with a relatively large aspect ratio.

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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)
EP21957181.7A 2021-09-18 2021-09-18 Optisches reflexionssystem für fahrzeuglampenbeleuchtungsvorrichtung und fahrzeuglampenbeleuchtungsvorrichtung Pending EP4206524A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/119443 WO2023039904A1 (zh) 2021-09-18 2021-09-18 用于车灯照明装置的光学反射***和车灯照明装置

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EP4206524A1 true EP4206524A1 (de) 2023-07-05
EP4206524A4 EP4206524A4 (de) 2024-01-03

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Publication number Priority date Publication date Assignee Title
CN2086843U (zh) * 1990-03-20 1991-10-16 于仲华 抛物柱面准焦点光源新型照明灯具
JP4945268B2 (ja) * 2007-03-02 2012-06-06 スタンレー電気株式会社 光量回収型車両用灯具
FR2966221B1 (fr) * 2010-08-04 2015-09-18 Valeo Vision Module d'eclairage a coupure avec reflecteur parabolique dispose sur un reflecteur elliptique
DE102011004569A1 (de) * 2011-02-23 2012-08-23 Automotive Lighting Reutlingen Gmbh Zum Einbau in einem Kraftfahrzeug vorgesehene Beleuchtungseinrichtung
JP2015185400A (ja) * 2014-03-25 2015-10-22 スタンレー電気株式会社 車両用灯具
DE102014226646A1 (de) 2014-12-19 2016-06-23 Osram Gmbh Beleuchtungseinrichtung
DE102017001019A1 (de) * 2017-02-04 2018-08-09 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Fahrzeugscheinwerfer
DE102018201980A1 (de) * 2018-02-08 2019-08-08 Bayerische Motoren Werke Aktiengesellschaft Beleuchtungsvorrichtung für ein Kraftfahrzeug
EP3657066B1 (de) * 2018-11-22 2020-12-30 ZKW Group GmbH Beleuchtungseinheit für einen kraftfahrzeugscheinwerfer zum erzeugen einer lichtverteilung mit hell-dunkel-grenze
CN113587041A (zh) 2020-04-30 2021-11-02 华域视觉科技(上海)有限公司 光学透镜、光学透镜组、车灯***及车辆
CN212565607U (zh) * 2020-06-29 2021-02-19 华域视觉科技(上海)有限公司 车灯光学***、车灯模组和车辆

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WO2023039904A1 (zh) 2023-03-23
CN117730230A (zh) 2024-03-19

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