WO2023048043A1 - Lampe de véhicule - Google Patents

Lampe de véhicule Download PDF

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Publication number
WO2023048043A1
WO2023048043A1 PCT/JP2022/034387 JP2022034387W WO2023048043A1 WO 2023048043 A1 WO2023048043 A1 WO 2023048043A1 JP 2022034387 W JP2022034387 W JP 2022034387W WO 2023048043 A1 WO2023048043 A1 WO 2023048043A1
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WO
WIPO (PCT)
Prior art keywords
light
emitting elements
light emitting
projection lens
distribution pattern
Prior art date
Application number
PCT/JP2022/034387
Other languages
English (en)
Japanese (ja)
Inventor
真紀子 小又
麻希子 末次
Original Assignee
株式会社小糸製作所
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
Priority claimed from JP2021153004A external-priority patent/JP2023044895A/ja
Priority claimed from JP2021190929A external-priority patent/JP2023077596A/ja
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Publication of WO2023048043A1 publication Critical patent/WO2023048043A1/fr

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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
    • F21S41/10—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]
    • F21S41/147—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
    • F21S41/10—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
    • F21S41/20—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/26—Elongated 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
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment 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
    • F21S41/60—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
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • 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
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/155—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having inclined and horizontal cutoff lines
    • 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
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/165—Arrangement or contour of the emitted light for high-beam region or low-beam region the borderlines between emitted regions and dark regions other than cut-off lines being variable
    • 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
    • F21W2102/20—Illuminance distribution within the emitted light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a vehicle lamp equipped with a projection lens.
  • Patent Document 1 as a configuration of such a vehicle lamp, a plurality of light emitting elements are arranged in a state in which a plurality of light emitting elements are arranged in a horizontal direction with a light emitting surface facing a projection lens, and a plurality of light emitting elements and a projection lens to form a cut-off line of a low-beam light distribution pattern.
  • the low-beam light distribution pattern formed by the direct light emitted from the plurality of light-emitting elements and incident on the projection lens is considerably brighter in its lower region.
  • the short-distance area becomes too bright, making it difficult to see the long-distance area. I can't do it.
  • the present invention has been made in view of such circumstances, and provides a vehicle lamp configured to irradiate light emitted from a plurality of light emitting elements toward the front of the lamp via a projection lens.
  • An object of the present invention is to provide a vehicular lamp capable of sufficiently ensuring forward visibility during illumination.
  • the invention of the present application is designed to achieve the above object by providing a configuration in which a predetermined second shade is additionally arranged.
  • the present invention attempts to achieve the above object by devising the configuration of the projection lens.
  • the vehicle lamp according to one aspect of the present invention includes: For a vehicle, comprising a plurality of light emitting elements and a projection lens, and configured to form a low beam light distribution pattern by irradiating light emitted from the plurality of light emitting elements toward the front of the lamp via the projection lens.
  • the plurality of light emitting elements are arranged in a horizontal direction with the light emitting surface facing the projection lens, A shade is arranged between the plurality of light emitting elements and the projection lens for blocking part of the light emitted from the plurality of light emitting elements in order to form a cutoff line of the low beam light distribution pattern, A second shade is arranged between the plurality of light emitting elements and the projection lens to block part of the direct light from the plurality of light emitting elements toward the upper region of the projection lens.
  • a vehicle lamp includes: For a vehicle, comprising a plurality of light emitting elements and a projection lens, and configured to form a low beam light distribution pattern by irradiating light emitted from the plurality of light emitting elements toward the front of the lamp via the projection lens.
  • the plurality of light emitting elements are arranged in a horizontal direction with the light emitting surface facing the projection lens,
  • a shade is arranged between the plurality of light emitting elements and the projection lens for blocking part of the light emitted from the plurality of light emitting elements in order to form a cutoff line of the low beam light distribution pattern,
  • a downward deflection section is formed in the upper region of the projection lens to deflect the direct light from the plurality of light emitting elements downward.
  • the specific arrangement and the number of arrangement are not particularly limited. .
  • shade is configured to form a cut-off line of a low-beam light distribution pattern by blocking part of the light emitted from a plurality of light-emitting elements, its specific arrangement and shape etc. are not particularly limited.
  • the specific arrangement and shape of the "second shade” are not particularly limited as long as they are configured to block part of the direct light from the plurality of light emitting elements toward the upper region of the projection lens. not something.
  • downward deflection section are not particularly limited as long as they are configured to deflect the direct light from the plurality of light emitting elements downward in the upper region of the projection lens. It may be formed on the front surface or the rear surface of the projection lens.
  • the above "upper region of the projection lens” means a region located above the optical axis of the projection lens.
  • a vehicular lamp has a configuration that forms a low-beam light distribution pattern by irradiating light emitted from a plurality of light-emitting elements toward the front of the lamp via a projection lens. Further, the plurality of light emitting elements are arranged in a horizontal direction with the light emitting surface facing the projection lens, and between the plurality of light emitting elements and the projection lens, a low beam light distribution pattern A shade is arranged to block part of the light emitted from the plurality of light emitting elements in order to form a cutoff line. A second shade is arranged between the plurality of light emitting elements and the projection lens to block part of the direct light from the plurality of light emitting elements toward the upper region of the projection lens. Therefore, the following effects can be obtained.
  • the reason why the lower area of the low-beam light distribution pattern becomes brighter than necessary is due to the direct light from the plurality of light-emitting elements entering the upper area of the projection lens. Therefore, it is possible to prevent the lower area of the low-beam light distribution pattern from becoming too bright by blocking part of the direct light from the plurality of light emitting elements toward the upper area of the projection lens with the second shade. can.
  • a vehicle lamp configured to irradiate emitted light from a plurality of light-emitting elements toward the front of the lamp via a projection lens
  • front visibility is sufficiently improved during low-beam illumination. can be secured.
  • a vehicle lamp includes a configuration that forms a low-beam light distribution pattern by irradiating light emitted from a plurality of light emitting elements toward the front of the lamp via a projection lens.
  • the plurality of light emitting elements are arranged in a horizontal direction with the light emitting surface facing the projection lens, and between the plurality of light emitting elements and the projection lens, a low beam light distribution pattern
  • a shade is arranged to block part of the light emitted from the plurality of light emitting elements in order to form a cutoff line.
  • a downward deflecting portion is formed in the upper region of the projection lens for downwardly deflecting light emitted from the plurality of light emitting elements. Therefore, the following effects can be obtained.
  • part of the direct light directed toward the upper region of the projection lens from the plurality of light-emitting elements is deflected downward by the downward deflecting unit and radiated forward of the lamp, so that the lower region of the low-beam light distribution pattern is Excessive brightness can be prevented in advance.
  • the light emitted from the downward deflecting portion can form the low-beam light distribution pattern as a light distribution pattern with a wide vertical width whose lower edge is extended downward.
  • the low-beam light distribution pattern is formed on the road surface in front of the lamp, it is possible to prevent the short distance area from becoming too bright and the long distance area from becoming difficult to see. It is possible to irradiate light up to a region in front of the lamp located closer to the lamp than the distance region. Thus, it is possible to sufficiently ensure forward visibility during low beam irradiation.
  • a vehicle lamp configured to irradiate emitted light from a plurality of light-emitting elements toward the front of the lamp via a projection lens
  • front visibility is sufficiently improved during low-beam illumination. can be secured.
  • FIG. 1 is a side sectional view showing a vehicle lamp according to a first embodiment of the present invention.
  • 2 is a view taken in the direction of arrow II in FIG. 1.
  • FIG. 3 is a cross-sectional view taken along line III--III in FIG. 4A is a diagram showing a low-beam light distribution pattern formed by light emitted from the vehicle lamp shown in FIG. 1.
  • FIG. 4B is a diagram showing a comparative example of FIG. 4A.
  • FIG. 5A is a diagram showing the illuminance distribution of the low-beam light distribution pattern shown in FIG. 4A.
  • FIG. 5B is a diagram showing a comparative example of FIG. 5A.
  • FIG. 6A is a diagram showing a high beam light distribution pattern formed by light emitted from the vehicle lamp shown in FIG. 1.
  • FIG. FIG. 6B is a diagram showing a state in which a part of the high beam light distribution pattern shown in FIG. 6A is missing.
  • FIG. 7 is a view similar to FIG. 3, showing a first modification of the first embodiment;
  • FIG. 8 is a view similar to FIG. 3, showing a second modification of the first embodiment;
  • FIG. 9A is a view similar to FIG. 4A showing the action of the second modification of the first embodiment;
  • FIG. 9B is a diagram showing a comparative example of FIG. 9A.
  • FIG. 10A is a view similar to FIG. 5A showing the action of the second modification of the first embodiment;
  • FIG. 10A is a view similar to FIG. 5A showing the action of the second modification of the first embodiment;
  • FIG. 5A showing the action of the second modification of the first embodiment
  • FIG. 10B is a diagram showing a comparative example of FIG. 10A.
  • FIG. 11 is a view similar to FIG. 3, showing a third modification of the first embodiment;
  • FIG. 12 is a side sectional view showing a vehicle lamp according to a second embodiment of the present invention.
  • 13 is a view in the direction of arrow XIII in FIG. 12.
  • FIG. 14 is a cross-sectional view taken along line XIV-XIV of FIG. 13.
  • FIG. 15A is a diagram showing a low-beam light distribution pattern formed by light emitted from the vehicle lamp shown in FIG. 12.
  • FIG. FIG. 15B is a view similar to FIG. 15A showing a comparative example of the second embodiment.
  • FIG. 16 is a diagram showing a high beam light distribution pattern formed by light emitted from the vehicle lamp shown in FIG.
  • FIG. 17 is a view similar to FIG. 13, showing a first modification of the second embodiment
  • FIG. 18A is a diagram showing the action of the first modification of the second embodiment, similar to FIG. 15A.
  • FIG. 18B is a diagram similar to FIG. 16 showing the action of the first modification of the second embodiment.
  • FIG. 19 is a view similar to FIG. 14, showing a second modification of the second embodiment.
  • FIG. 20A is a view similar to FIG. 18A showing the action of the second modification of the second embodiment;
  • FIG. 20B is a view similar to FIG. 18B showing the action of the second modification of the second embodiment.
  • FIG. 21 is a view similar to FIG. 13, showing a third modification of the second embodiment;
  • FIG. 22 is a view similar to FIG. 14, showing a third modification of the second embodiment;
  • FIG. 1 is a side sectional view showing a vehicle lamp 10 according to a first embodiment of the present invention. 2 is a view taken in the direction of arrow II in FIG. 1. FIG.
  • the direction indicated by X is the "front of the lamp”
  • the direction indicated by Y is the “left direction” ("right direction” when viewed from the front of the lamp) orthogonal to the "front of the lamp”
  • the direction indicated by Z. is the "upward direction”. The same applies to figures other than these.
  • the vehicle lamp 10 is a headlamp provided at the front end of a vehicle, and has a configuration in which a lamp unit 20 is accommodated in a lamp chamber formed by a lamp body 12 and a translucent cover 14 .
  • FIG. 3 is a cross-sectional view taken along line III-III in FIG.
  • the lamp unit 20 is a so-called projector-type lamp unit, and includes a plurality of first light emitting elements 30 and second light emitting elements 40 as light sources, and a first reflector 32 and a second reflector 42. , and a projection lens 50 . Further, the lamp unit 20 is configured to selectively form a low beam light distribution pattern and a high beam light distribution pattern with the light emitted from the lamp unit 20 .
  • the plurality of first light emitting elements 30 are configured to light during low beam irradiation and high beam irradiation
  • the plurality of second light emitting elements 40 are configured to additionally light during high beam irradiation.
  • the lamp unit 20 directs the direct light from the plurality of first light emitting elements 30 and the light emitted from the plurality of first light emitting elements 30 and reflected by the first reflector 32 through the projection lens 50 toward the front of the lamp.
  • a low-beam light distribution pattern is formed by irradiating with a light beam.
  • direct light from the plurality of second light emitting elements 40 and light emitted from the plurality of second light emitting elements 40 and reflected by the second reflector 42 are projected through the projection lens 50 toward the front of the lamp.
  • An additional light distribution pattern for high beam is formed.
  • the optical path of light emitted from the first light emitting element 30 is indicated by solid lines, and the optical path of light emitted from the second light emitting element 40 is indicated by broken lines.
  • the projection lens 50 is composed of a plano-convex aspherical lens with a convex curved front surface, and has an optical axis Ax extending in the longitudinal direction of the lamp.
  • the projection lens 50 projects a light source image formed on a rear focal plane including the rear focal point F of the projection lens 50 as an inverted image onto a virtual vertical screen in front of the lamp, that is, in front of the vehicle.
  • the projection lens 50 is supported by a lens holder 52 at its outer peripheral portion.
  • the lens holder 52 is supported by a heat sink 54 .
  • the plurality of first light emitting elements 30 are arranged side by side in the left-right direction above the optical axis Ax, and the plurality of second light emitting elements 40 are arranged above the optical axis Ax. They are arranged side by side in the left-right direction on the lower side.
  • Each of the plurality of first light emitting elements 30 is composed of 11 white light emitting diodes each having a rectangular, more specifically, a square light emitting surface 30a, which are arranged at small intervals from each other. More specifically, the first light emitting element 30 arranged directly above the optical axis Ax and the five first light emitting elements 30 arranged on the right side of the first light emitting element 30 (on the left side when viewed from the front of the lamp) are , are displaced downward with respect to the remaining five first light emitting elements 30 arranged on the left side of the first light emitting element 30 (on the right side in front view of the lamp).
  • each of the plurality of second light emitting elements 40 is composed of 13 white light emitting diodes each having a rectangular shape, specifically, a square light emitting surface 40a having the same size as the light emitting surface 30a. are arranged in a horizontal row.
  • the plurality of first light-emitting elements 30 are configured to light up all at once, but the plurality of second light-emitting elements 40 are configured to light up all at once as well as individually. That is, each of the plurality of second light-emitting elements 40 is controlled to be turned on and off according to the driving conditions of the own vehicle by an electronic control unit (not shown).
  • the driving condition of the own vehicle can be grasped, for example, based on detection values such as steering angle data of the own vehicle, navigation data, image data of the road ahead.
  • a plurality of first light emitting elements 30 and second light emitting elements 40 are mounted on a common substrate 56 , and the substrate 56 is supported by a heat sink 54 .
  • the substrate 56 is arranged in a state tilted backward with respect to a vertical plane perpendicular to the optical axis Ax.
  • the backward tilt angle of the substrate 56 with respect to the vertical plane is set to a value of 10 to 20°, for example, about 15°.
  • the plurality of first light-emitting elements 30 and second light-emitting elements 40 have their light-emitting surfaces 30a and 40a directed upward by 10 to 20°, for example, about 15° with respect to the front direction of the lamp, that is, the projection lens. It is positioned facing 50.
  • the first reflector 32 and the second reflector 42 are arranged on the front side of the lamp with respect to the board 56 .
  • the first reflector 32 and the second reflector 42 are integrally formed and supported by heat sinks 54 at both left and right ends thereof.
  • the first reflector 32 has a reflecting surface 32a formed so as to surround the plurality of first light emitting elements 30.
  • the light emitted from the plurality of first light emitting elements 30 is directed toward the projection lens 50 on the reflecting surface 32a. It is configured to reflect
  • the reflecting surface 32a has a horizontally elongated concave surface shape, and the upper edge of the reflecting surface 32a has a substantially horizontally elongated elliptical outer shape when viewed from the front of the lamp.
  • the second reflector 42 has a reflecting surface 42a formed so as to surround the plurality of second light emitting elements 40, and the light emitted from the plurality of second light emitting elements 40 is projected onto the projection lens 50 at the reflecting surface 42a. configured to reflect toward A pair of small reflecting surfaces 42s are arranged on both upper and lower sides of each of the plurality of second light emitting elements 40 in the reflecting surface 42a. The pair of upper and lower small reflecting surfaces 42s reflect the emitted light from each of the second light emitting elements 40 toward the projection lens 50 as substantially parallel light.
  • the reflecting surface 32a of the first reflector 32 is formed with an opening 32b surrounding the plurality of first light emitting elements 30 in the vicinity of the outer periphery of the reflecting surface 32a.
  • the openings 32b are formed so as to extend along the arrangement of the plurality of first light emitting elements 30 in a substantially laterally elongated rectangular shape with left and right steps.
  • the reflecting surface 42a of the second reflector 42 is formed with a horizontally long opening 42b surrounding the plurality of second light emitting elements 40 near the outer periphery of the reflecting surface 42a.
  • the opening 42b is formed to extend in a horizontally long rectangular shape along the arrangement of the plurality of second light emitting elements 40 .
  • Direct light from the plurality of first light emitting elements 30 and light emitted from the plurality of first light emitting elements 30 reflected by the first reflector 32 are separated between the plurality of first light emitting elements 30 and the plurality of second light emitting elements 40 .
  • a shade 60 is provided for blocking part of the incident light and forming a cut-off line for the low-beam light distribution pattern.
  • the shade 60 is integrally formed with the first reflector 32 and the second reflector 42. That is, the shade 60 is formed by extending the connecting portion of the first reflector 32 and the second reflector 42 toward the front of the lamp with a wedge-shaped vertical cross section.
  • the upper surface of the shade 60 forms part of the reflecting surface 32 a of the first reflector 32
  • the lower surface of the shade 60 forms part of the reflecting surface 42 a of the second reflector 42 .
  • the front edge 60a of the shade 60 is formed so as to extend in the left-right direction at the position of the rear focal point F of the projection lens 50 along a vertical plane perpendicular to the optical axis Ax. Specifically, the front edge 60a extends horizontally at a position slightly above the optical axis Ax at the left side of the optical axis Ax (the right side when viewed from the front of the lamp). The right side portion (the left side portion when viewed from the front of the lamp) extends horizontally at a position slightly below the optical axis Ax. Further, the left end portion of the front edge 60a is connected to the portion on the left side of the optical axis Ax while extending obliquely in the upper left direction.
  • a second shade 70 is arranged to block part of the direct light directed toward the area.
  • the second shade 70 is formed of a plate-like member, and is supported by the first reflector 32 at the upper end portion of the second shade 70 while being arranged substantially parallel to the substrate 56 .
  • the second shade 70 is located at a position that partially overlaps the five first light emitting elements 30 positioned in the center in the left-right direction among the eleven first light emitting elements 30 when viewed from the front of the lamp. placed in relation to each other.
  • the first light emitting element 30 located directly above the optical axis Ax and the first light emitting element 30 adjacent to the right side of the first light emitting element 30 are hidden by the second shade 70 at their upper ends.
  • the upper left end of the first light emitting element 30 adjacent to the right thereof is hidden by the second shade 70 .
  • the upper half of the first light emitting element 30 adjacent to the left side of the first light emitting element 30 located directly above the optical axis Ax is hidden by the second shade 70 .
  • the upper right quarter of the first light emitting element 30 adjacent to the left thereof is hidden by the second shade 70 .
  • the lower end surface of the second shade 70 is formed to extend obliquely upward toward the front of the lamp at an angle at which direct light from the plurality of first light emitting elements 30 does not enter.
  • the first reflector 32 is formed with a notch portion 32c for disposing the second shade 70 and a support portion 32d for supporting the upper end portion of the second shade 70. is formed.
  • FIG. 4A is a perspective view of a low-beam light distribution pattern PL formed on a virtual vertical screen arranged at a position 25 m in front of the vehicle by light emitted from the lighting unit 20 of the vehicle lighting 10 toward the front of the lighting.
  • FIG. 4 is a diagram showing;
  • the low-beam light distribution pattern PL is a left-handed low-beam light distribution pattern, and has cutoff lines CL1 and CL2 that are uneven on the left and right at the upper edge thereof.
  • the cut-off lines CL1 and CL2 extend in the horizontal direction with different levels on the left and right of the line VV passing vertically through the vanishing point HV in the front direction of the lamp.
  • the lane side portion is formed as a lower cutoff line CL1
  • the own lane side portion on the left side of the VV line is formed as an upper cutoff line CL2 rising from the lower cutoff line CL1 via an inclined portion. ing.
  • the elbow point E which is the intersection of the lower cutoff line CL1 and the line VV, is located approximately 0.5 to 0.6° below HV.
  • the low-beam light distribution pattern PL is formed by direct light from the multiple first light emitting elements 30 and reflected light from the first reflector 32 .
  • the left and right stepped cut-off lines CL1 and CL2 are formed as an inverted projected image of the front edge 60a of the shade 60. As shown in FIG.
  • FIG. 4B is a diagram showing a comparative example of the present embodiment, and is a diagram showing a low-beam light distribution pattern PL' that would be formed if the lamp unit 20 did not have the second shade 70. As shown in FIG. .
  • the low-beam light distribution pattern PL' is also formed as a light distribution pattern similar to the low-beam light distribution pattern PL, but the illuminance distribution is partially different from that of the low-beam light distribution pattern PL.
  • the low-beam light distribution pattern PL' is formed as an excessively bright portion Pa' in which the lower region is brighter than necessary. Therefore, when the low-beam light distribution pattern PL' is formed on the road surface in front of the lamp, the short-distance region where the excessively bright portion Pa' is located becomes too bright, and the long-distance region, that is, the excessively bright portion Pa' and the cutoff line CL1, The area between CL2 becomes difficult to see, and therefore, sufficient forward visibility cannot be ensured during low beam irradiation.
  • the excessive bright portion Pa' is not formed in its lower region. This is because, in the lamp unit 20 according to the present embodiment, part of the direct light from the plurality of light emitting elements 30 directed to the upper region of the projection lens 50 is blocked by the second shade 70, and as a result, the lower portion of the low beam light distribution pattern is blocked. This is because the irradiation light for forming the regions is reduced.
  • the second shade 70 is arranged at a position that blocks part of the direct light from the five first light emitting elements 30 positioned in the center in the left-right direction among the eleven first light emitting elements 30.
  • the brightness of the front portion in the short distance area of the road surface in front of the lamp is mainly suppressed, and a certain amount of brightness is ensured in the left and right side portions of the short distance area.
  • FIG. 5A is a diagram showing an illuminance distribution IDv along line VV of the low-beam light distribution pattern PL shown in FIG. 4A formed on the virtual vertical screen
  • FIG. 5B is a comparative example of FIG. 5A.
  • FIG. 10 shows.
  • the illuminance Ev sharply rises from near 0° corresponding to the HH line to its lower side. This corresponds to the fact that the illuminance Ev of the low-beam light distribution pattern PL is highest in the regions below the cutoff lines CL1 and CL2.
  • the illuminance distribution IDv reaches the maximum illuminance around 1°D, then sharply drops as the downward angle increases, and then smoothly drops to approximately zero around 10°D.
  • the illuminance Ev also rises sharply from near 0° to below it, reaching the maximum illuminance near 1°D, and then downward. As the angle increases, it drops sharply and drops to almost zero at around 10°D, but a bulge occurs around 4 to 6°D in the middle of the drop (see dashed line area A in FIG. 5B).
  • the illuminance distribution IDv' of the low-beam light distribution pattern PL' is indicated by a chain double-dashed line.
  • the low-beam light distribution pattern PL has a smooth illuminance distribution in which the illuminance Ev around 4 to 6°D is low with respect to the low-beam light distribution pattern PL'.
  • the low-beam light distribution pattern PL having such an illuminance distribution IDv on the road surface in front of the lamp, it is possible to prevent the short distance area from becoming too bright and the long distance area becoming difficult to see. This ensures sufficient forward visibility during low-beam illumination.
  • FIG. 6A is a view perspectively showing a high-beam light distribution pattern PH formed on the virtual vertical screen by light emitted from the lamp unit 20 of the vehicle lamp 10 toward the front of the lamp.
  • the high beam light distribution pattern PH is formed as a synthetic light distribution pattern in which the additional light distribution pattern PA is added to the low beam light distribution pattern PL.
  • the additional light distribution pattern PA includes the direct light from the 13 second light emitting elements 40 and the light emitted from the 13 second light emitting elements 40 and reflected by the second reflector 42 , specifically the light from the second reflector 42 . It is a light distribution pattern formed by the light reflected by 13 pairs of small reflecting surfaces 42s that constitute the reflecting surface 42a.
  • the additional light distribution pattern PA is formed as a composite light distribution pattern of 13 small light distribution patterns PAa formed by lighting each of the 13 second light emitting elements 40 .
  • Each of the 13 small light distribution patterns PAa is formed as a substantially rectangular light distribution pattern, and the small light distribution patterns PAa adjacent to each other are formed in a horizontal row while slightly overlapping each other.
  • the direct light from each second light emitting element 40 and part of the reflected light from each pair of small reflecting surfaces 42 s of the reflector 42 are blocked by the shade 60 .
  • each small light distribution pattern PAa is formed as a slightly vertically elongated substantially rectangular light distribution pattern, and the lower edge thereof is formed so as to extend along the cutoff lines CL1 and CL2.
  • FIG. 6B is a view perspectively showing an intermediate light distribution pattern PM in which a part of the high beam light distribution pattern PH shown in FIG. 6A is omitted.
  • the sixth small light distribution pattern PAa from the right of the 13 small light distribution patterns PAa forming the additional light distribution pattern PA is missing due to the turning off of the second light emitting element 40 that is sixth from the left. shows an intermediate light distribution pattern PM in the state.
  • the irradiation light from the lamp unit 20 is prevented from striking the oncoming vehicle 2, and as much as possible within a range that does not give glare to the driver of the oncoming vehicle 2. It is configured so that it can illuminate a wide area ahead.
  • the second light emitting elements 40 to be turned off are sequentially switched to change the shape of the intermediate light distribution pattern PM, thereby changing the shape of the intermediate light distribution pattern PM. It is possible to maintain the state of illuminating the road ahead as wide as possible within the range that does not give glare.
  • the existence of the oncoming vehicle 2 is detected by an on-board camera (not shown) or the like. Even when a vehicle ahead exists on the road ahead or a pedestrian exists on the shoulder of the road ahead, this is detected and part of the small light distribution pattern PAa is omitted. Therefore, it is configured so as not to give glare.
  • the lamp unit 20 of the vehicle lamp 10 irradiates the light emitted from the plurality of first light emitting elements (light emitting elements) 30 through the projection lens 50 toward the front of the lamp to achieve a low beam distribution. It is configured to form a pattern PL. Also, the plurality of first light emitting elements 30 are arranged side by side in the left-right direction with the light emitting surfaces 30 a facing the projection lens 50 . In addition, between the plurality of first light emitting elements 30 and the projection lens 50, part of the emitted light from the plurality of first light emitting elements 30 is arranged to form the cutoff lines CL1 and CL2 of the low beam light distribution pattern PL. A shade 60 for blocking light is arranged.
  • a second shade 70 is arranged between the plurality of first light emitting elements 30 and the projection lens 50 to block part of the direct light from the plurality of first light emitting elements 30 toward the upper region of the projection lens 50 . ing. Therefore, the following effects can be obtained.
  • the reason why the lower area of the low-beam light distribution pattern PL becomes brighter than necessary is due to the direct light from the plurality of first light emitting elements 30 entering the upper area of the projection lens 50 . Therefore, by shielding part of the direct light from the plurality of first light emitting elements 30 toward the upper region of the projection lens 50 with the second shade 70, the lower region of the low beam light distribution pattern PL is prevented from becoming too bright. It can be prevented before it happens.
  • the low-beam light distribution pattern PL is formed on the road surface in front of the lamp, it is possible to prevent the short-distance area from becoming too bright and the long-distance area from becoming difficult to see. It is possible to sufficiently ensure forward visibility during irradiation.
  • the vehicle lamp 10 configured to irradiate the light emitted from the plurality of first light emitting elements 30 through the projection lens 50 toward the front of the lamp, Sufficient forward visibility can be ensured.
  • the second shade 70 is the first light emitting element positioned at the center in the left-right direction relative to the first light emitting elements 30 positioned at both ends in the left-right direction among the plurality of first light-emitting elements 30 . It is arranged at a position where the direct light from 30 is blocked by a large amount. Therefore, when the low-beam light distribution pattern PL is formed on the road surface in front of the lamp, the brightness of the front portion in the short distance region can be suppressed intensively.
  • the first reflector (reflector) 32 that reflects the light emitted from the plurality of first light emitting elements 30 toward the projection lens 50 is provided, the brightness of the low beam light distribution pattern PL is In addition, the degree of freedom of the light distribution of the low-beam light distribution pattern PL can be increased.
  • the first reflector 32 is integrally formed with the shade 60, the accuracy of light distribution control can be improved and the number of parts of the vehicle lamp 10 can be reduced. can be done.
  • the lighting unit 20 of the vehicle lamp 10 can selectively form the low beam light distribution pattern PL and the high beam light distribution pattern PH. Further, since the second reflector 42 for reflecting the light emitted from the plurality of second light emitting elements 40 additionally lit during high beam irradiation is formed integrally with the first reflector 32, the number of parts of the vehicle lamp 10 is reduced. can be reduced.
  • the second shade 70 is arranged at a position that blocks part of the direct light emitted from the five first light emitting elements 30 positioned at the center in the left-right direction among the 11 first light emitting elements 30 .
  • the number of the first light emitting elements 30 is shaded and the amount of shade, thereby adjusting the brightness of the short-distance area of the road surface in front of the lamp.
  • the projection lens 50 is described as being composed of a plano-convex aspherical lens, but it is also possible to be composed of a biconvex lens, a convex meniscus lens, or the like. It is also possible to have a configuration having an outer shape of .
  • the lamp unit 20 is described as having eleven first light emitting elements 30 and thirteen second light emitting elements 40, but the number of first and second light emitting elements other than this number may be different. A configuration with 30 and 40 is also possible.
  • the plurality of first light emitting elements 30 are arranged in a staggered manner, but it is also possible to arrange them in a horizontal row.
  • the light emitting surfaces 30a and 40a of the plurality of first and second light emitting elements 30 and 40 have been described as having a square outer shape. It is also possible to adopt a configuration having an external shape such as a rectangular shape or a laterally long rectangular shape.
  • first and second reflectors 32, 42 are arranged to effectively utilize the light emitted from the plurality of first and second light emitting elements 30, 40. and second reflectors 32, 42, or both are not arranged.
  • the lamp unit 20 of the vehicle lamp 10 has been described as being capable of selectively forming the low beam light distribution pattern PL and the high beam light distribution pattern PH, but only the low beam light distribution pattern PL is formed. It is also possible to configure
  • FIG. 7 is a view, similar to FIG. 3, showing a lamp unit 120 of a vehicle lamp according to this modified example.
  • the basic configuration of the lamp unit 120 is similar to that of the lamp unit 20 of the above embodiment, but the configuration of the second shade 170 is different from that of the above embodiment.
  • the configuration of 132 is also partially different from the first reflector 32 shown in FIG.
  • a second light emitting element 30 is provided between the plurality of first light emitting elements 30 and the projection lens 50 to block part of the direct light from the plurality of first light emitting elements 30 toward the upper region of the projection lens 50 .
  • a shade 170 is arranged.
  • this modification differs from the above-described embodiment in that the second shade 170 is formed integrally with the first reflector 132 .
  • the second shade 170 is formed in substantially the same arrangement and shape as the second shade 70 of the above embodiment.
  • the first reflector 132 has a reflecting surface 132a and an opening 132b similar to those of the first reflector 32 shown in FIG.
  • the configurations of the shade 60 and the second reflector 42 are the same as those of the lamp unit 20 shown in FIG.
  • FIG. 8 is a view, similar to FIG. 3, showing a lighting unit 220 of a vehicle lamp according to this modified example.
  • the basic configuration of the lamp unit 220 is similar to that of the lamp unit 20 shown in FIG. 3, but the configuration of the second shade 270 is different.
  • a second light emitting element 30 is provided between the plurality of first light emitting elements 30 and the projection lens 50 to block part of the direct light from the plurality of first light emitting elements 30 toward the upper region of the projection lens 50 .
  • a shade 270 is arranged.
  • the second shade 270 is formed integrally with the first reflector 232 and has a reflecting surface 270a, which is different from the above embodiment.
  • the reflecting surface 270a of the second shade 270 is formed to extend along the horizontal plane above the optical axis Ax, thereby reflecting the direct light from the plurality of first light emitting elements 30 downward to the projection lens 50. is configured to be incident on the Also, part of the direct light from the plurality of first light emitting elements 30 reflected by the reflecting surface 270 a is configured to enter the projection lens 50 after being reflected by the reflecting surface 232 a of the first reflector 232 .
  • the first reflector 232 has a reflecting surface 232a and an opening 232b similar to those of the first reflector 32 of the lamp unit 20 .
  • the configurations of the shade 60 and the second reflector 42 are the same as those of the lamp unit 20 shown in FIG.
  • FIG. 9A is a view perspectively showing a low-beam light distribution pattern PL-2 formed on the virtual vertical screen by the light emitted from the lamp unit 220 of this modified example toward the front of the lamp.
  • the low-beam light distribution pattern PL-2 is formed as a light distribution pattern in which a distant illumination light distribution pattern Pa-2 is added to the low-beam light distribution pattern PL shown in FIG. 4A.
  • FIG. 9B is a diagram showing a comparative example of this modification, and is a diagram showing a low-beam light distribution pattern PL' that would be formed if the lamp unit 220 did not have the second shade 270.
  • FIG. FIG. 4B is a view similar to FIG. 4B;
  • the light distribution pattern Pa-2 for distant irradiation of the low-beam light distribution pattern PL-2 shown in FIG. 9A is substantially the same as the excessive bright portion Pa' formed in the lower region in the low-beam light distribution pattern PL' shown in FIG. 9B.
  • a shaped light distribution pattern is formed in a displaced upper region near the cutoff lines CL1 and CL2.
  • FIG. 10A is a diagram showing an illuminance distribution IDv-2 along the VV line of the low-beam light distribution pattern PL-2 formed on the virtual vertical screen
  • FIG. 10B is a diagram showing a comparative example of FIG. 10A. is.
  • the illuminance distribution IDv-2 of the low-beam light distribution pattern PL-2 has a bulge of about 4 to 6°D with respect to the illuminance distribution IDv' of the low-beam light distribution pattern PL' shown in FIG. 10B. (see dashed line area A in FIG. 10A).
  • the illuminance distribution IDv-2 of the low-beam light distribution pattern PL-2 has a maximum illuminance near 1°D, and then the illuminance Ev sharply decreases as the downward angle increases. (See dashed line area B in FIG. 10A).
  • the low-beam light distribution pattern PL-2 By forming the low-beam light distribution pattern PL-2 having such an illuminance distribution IDv-2 on the road surface in front of the lamp, as shown in FIG. 9A, the brightness of the entire low-beam light distribution pattern PL-2 is impaired. Distant visibility is further improved without being blocked.
  • the direct light from the plurality of first light emitting elements 30 reflected downward by the reflecting surface 270a of the second shade 270 becomes light that illuminates the long-distance area of the road surface in front of the lamp. Therefore, the arrangement of the second shade 270 does not impair the brightness of the entire low-beam distribution pattern PL-2, and the low-beam distribution pattern PL-2 has excellent long-distance visibility.
  • FIG. 11 is a view, similar to FIG. 3, showing a lighting unit 320 of a vehicle lamp according to this modified example.
  • the basic configuration of a lamp unit 320 is similar to that of the lamp unit 20 shown in FIG. Also, the configuration and arrangement of the first reflector 332 are different from those of the lamp unit 20 .
  • this modification differs from the lamp unit 20 in that the substrate 356 that supports the plurality of first light emitting elements 30 is configured separately from the substrate 358 that supports the plurality of second light emitting elements 40 .
  • the shape of the heat sink 354 that supports the two substrates 356 and 358 is also partly different from that of the lamp unit 20 .
  • the plurality of first light-emitting elements 30 are arranged above the optical axis Ax with their light-emitting surfaces 30a facing obliquely downward with respect to the front direction of the lamp.
  • the substrate 358 is arranged in a state tilted backward with respect to the vertical plane orthogonal to the optical axis Ax, like the substrate 56 of the above embodiment. Further, the substrate 356 is arranged in a forward tilted state with respect to a vertical plane orthogonal to the optical axis Ax.
  • the first reflector 332 is arranged with its reflecting surface 332 a facing obliquely downward in front of the lamp, thereby reflecting the light emitted from the plurality of first light emitting elements 30 toward the projection lens 50 . is configured to
  • a second shade is provided between the plurality of first light emitting elements 30 and the projection lens 50 to block part of the direct light from the plurality of first light emitting elements 30 toward the upper region of the projection lens 50.
  • 370 are arranged.
  • the second shade 370 is composed of a plate-like member, and is arranged substantially parallel to the substrate 356, and has a first reflector 332 at its upper end. supported by
  • the first reflector 332 has an opening 332b similar to that of the first reflector 32 of the lamp unit 20 .
  • the configurations of the shade 60 and the second reflector 42 are the same as those of the lamp unit 20 .
  • the direct light emitted from the plurality of first light emitting elements 30 in the direction perpendicular to the light emitting surface 30a becomes light directed toward the substantially central region in the vertical direction of the projection lens 50. . Therefore, the proportion of direct light from the plurality of first light emitting elements 30 toward the upper region of the projection lens 50 is smaller than in the lamp unit 20 shown in FIG.
  • the low-beam light distribution pattern PL' (see FIG. 4B) of the comparative example of the lamp unit 20 is bright.
  • the bright portion Pa' is not formed in the lower region.
  • the phenomenon that the lower area of the low-beam light distribution pattern PL' becomes bright still remains.
  • the lamp unit 320 according to the present modification includes the second shade 370, it is possible to block part of the direct light from the plurality of first light emitting elements 30 toward the upper region of the projection lens 50. can. In this way, it is possible to prevent the lower area of the low-beam light distribution pattern from becoming bright.
  • FIG. 12 is a side sectional view showing a vehicle lamp according to a second embodiment of the present invention.
  • 13 is a view in the direction of arrow XIII in FIG. 12.
  • a vehicle lamp 410 is a headlamp provided at the front end of a vehicle, and has a configuration in which a lamp unit 420 is accommodated in a lamp chamber formed by a lamp body 412 and a translucent cover 414 .
  • FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG.
  • the lamp unit 420 is a so-called projector-type lamp unit, and includes a plurality of first light emitting elements 430 and second light emitting elements 440 as light sources, and a first reflector 432 and a second reflector 442. and a projection lens 450 .
  • the configurations of the first light emitting element 430, the second light emitting element 440, the first reflector 432, the second reflector 442 and the projection lens 450 are the first light emitting element 30 and the second light emitting element 440 shown in FIG.
  • the configuration is the same as that of the second light emitting element 40 , the first reflector 32 , the second reflector 42 and the projection lens 50 .
  • the projection lens 450 is a plano-convex aspherical lens having a convex front surface 450a, and has an optical axis Ax extending in the longitudinal direction of the lamp.
  • the rear surface 450b of the projection lens 450 is formed with a downward deflection portion 450c in its upper region 450b1. Details of the downward deflector 450c will be described later.
  • the projection lens 450 is supported by a lens holder 452 at its outer peripheral portion.
  • the lens holder 452 is supported by a heat sink 454 .
  • Each of the plurality of first light emitting elements 430 is composed of 11 white light emitting diodes each having a rectangular, more specifically, a square light emitting surface 430a, which are arranged at small intervals from each other.
  • each of the plurality of second light emitting elements 440 is composed of nine white light emitting diodes each having a rectangular shape, specifically, a square light emitting surface 440a having the same size as the light emitting surface 30a. are arranged in a horizontal row.
  • a plurality of first light emitting elements 430 and second light emitting elements 440 are mounted on a common substrate 456 , and the substrate 456 is supported by a heat sink 454 .
  • the substrate 456 has the same configuration as the substrate 56 shown in FIG.
  • the first reflector 432 has a reflective surface 432a formed so as to surround the plurality of first light emitting elements 430 .
  • the second reflector 442 has a reflecting surface 442 a formed to surround the plurality of second light emitting elements 440 .
  • the reflective surfaces 432a and 442a have the same configurations as the reflective surfaces 32a and 42a shown in FIG. 3, respectively.
  • Direct light from the plurality of first light emitting elements 430 and light emitted from the plurality of first light emitting elements 430 reflected by the first reflector 432 are present between the plurality of first light emitting elements 430 and the plurality of second light emitting elements 440 .
  • a shade 460 is provided for blocking part of the incident light and forming a cut-off line for the low-beam light distribution pattern.
  • a front edge 460a of the shade 460 is formed so as to extend in the left-right direction along a vertical plane perpendicular to the optical axis Ax at the position of the rear focal point F of the projection lens 450 in a staggered manner.
  • the shade 460 has the same configuration as the shade 60 shown in FIG.
  • the projection lens 450 is configured to deflect part of the emitted light from the plurality of first light emitting elements 430 downward at a downward deflection portion 450c formed on the rear surface 450b. .
  • the downward deflector 450c is formed on the rear surface 450b of the projection lens 450 at a position away from the optical axis Ax.
  • the rear surface 450b of the projection lens 450 is formed such that its upper region 450b1 is offset toward the lamp front side with respect to the other general region.
  • the downward deflecting portion 450c is formed by an inclined surface extending in the left-right direction while being inclined forward at the lower end portion of the upper region 450b1.
  • the downward deflection angle for the light emitted from the plurality of first light emitting elements 430 is set by the forward inclination angle of the downward deflection portion 450c.
  • the light reaching the downward deflecting portion 450c is refracted downward and enters the projection lens 450, whereupon the light reaches the projection lens 450. It exits the front face 450a of 450 as a fairly downward light.
  • the optical path indicated by the two-dot chain line in FIG. It is the optical path of incident light.
  • the downward deflector 450c is not formed on the rear surface 450b of the projection lens 450, light incident on the projection lens 450 from the plurality of first light emitting elements 430 is directed downward from the front surface 450a of the projection lens 450.
  • the downward angle of the light is not so large.
  • the direct light from the plurality of second light emitting elements 440 incident on the projection lens 450 would be The light is emitted from the front surface 450a of the projection lens 450 as slightly upward light.
  • FIG. 15A is a perspective view of a low beam light distribution pattern PL formed on a virtual vertical screen arranged at a position 25 m in front of the vehicle by light emitted forward from the lamp unit 420 of the vehicle lamp 410.
  • FIG. FIG. 4 is a diagram showing;
  • the low-beam light distribution pattern 2PL is a left-handed low-beam light distribution pattern, and has cut-off lines CL1 and CL2 that are uneven on the left and right at the upper edge of the low-beam light distribution pattern 2PL.
  • the cut-off lines CL1 and CL2 extend in the horizontal direction with different levels on the left and right of the line VV passing vertically through the vanishing point HV in the front direction of the lamp.
  • the lane side portion is formed as the lower cutoff line CL1.
  • the portion on the left side of the VV line on the own lane side is formed as an upper cutoff line CL2 rising from the lower cutoff line CL1 via an inclined portion.
  • the elbow point E which is the intersection of the lower cutoff line CL1 and the line VV, is located approximately 0.5 to 0.6° below HV.
  • the low-beam light distribution pattern 2PL is formed as a light distribution pattern whose lower region has substantially uniform brightness and which has a wide vertical width.
  • FIG. 15B is a diagram showing a comparative example of the present embodiment, and is a diagram showing a low-beam light distribution pattern 2PL' that would be formed if the projection lens 450 did not have the downward deflector 450c. is.
  • the low-beam light distribution pattern 2PL' is also formed as a light distribution pattern substantially similar to the low-beam light distribution pattern 2PL, but is formed as a light distribution pattern with a narrower vertical width than the low-beam light distribution pattern 2PL. . Further, the lower region of the low-beam light distribution pattern 2PL' is formed as an excessively bright portion 2Pa' that is brighter than necessary.
  • the short-distance region where the excessively bright portion 2Pa' is located becomes too bright, and the distance between the excessively bright portion 2Pa' and the cutoff lines CL1 and CL2 becomes too bright. It becomes difficult to see the long-distance area of As a result, sufficient forward visibility cannot be ensured during low-beam irradiation.
  • the low-beam light distribution pattern 2PL does not have such an excessively bright portion 2Pa' in its lower region. This is because, in the lamp unit 420 according to the present embodiment, part of the direct light directed toward the upper region of the projection lens 450 from the plurality of first light emitting elements 430 is deflected downward by the downward deflector 450c, and then travels forward of the lamp. This is because the irradiation light for forming the lower region of the low-beam light distribution pattern 2PL is reduced.
  • the low-beam light distribution pattern 2PL is formed as a light distribution pattern in which the lower edge of the low-beam light distribution pattern 2PL' is extended downward. This is also because part of the direct light directed toward the upper region of the projection lens 450 from the plurality of first light emitting elements 430 is deflected downward by the downward deflector 450c and radiated forward of the lamp.
  • FIG. 16 is a diagram showing a high beam light distribution pattern 2PH formed on the virtual vertical screen by light emitted from the lamp unit 420 toward the front of the lamp.
  • the high beam light distribution pattern 2PH is formed as a light distribution pattern in which an additional light distribution pattern 2PA is added to the low beam light distribution pattern 2PL.
  • the additional light distribution pattern 2PA is formed by the direct light from the plurality of second light emitting elements 440 and the light emitted from the plurality of second light emitting elements 440 and reflected by the second reflector 442 to form the low beam light distribution pattern 2PL.
  • the lower edge vicinity area 2PAa of the additional light distribution pattern 2PA is formed so as to overlap with the cutoff vicinity area of the low-beam light distribution pattern 2PL.
  • the high beam distribution pattern 2PH is formed in a state where the low beam distribution pattern 2PL and the additional distribution pattern 2PA partially overlap, so that no gap is formed between them.
  • the lamp unit 420 of the vehicle lamp 410 emits light emitted from the plurality of first light emitting elements (light emitting elements) 430 through the projection lens 450 toward the front of the lamp, thereby forming a low-beam light distribution pattern.
  • the plurality of first light emitting elements 430 are arranged side by side in the left-right direction with the light emitting surface 430 a facing the projection lens 450 .
  • part of the emitted light from the plurality of first light emitting elements 430 is arranged to form the cutoff lines CL1 and CL2 of the low beam light distribution pattern 2PL.
  • a shade 460 for blocking light is arranged.
  • the downward deflection part 450c for downwardly deflecting the light emitted from the plurality of first light emitting elements 430 is formed in the upper region of the projection lens 450, the following effects can be obtained.
  • the reason why the lower area of the low-beam light distribution pattern 2PL becomes brighter than necessary is due to the direct light from the plurality of first light emitting elements 430 incident on the upper area of the projection lens 450 . Therefore, direct light from the plurality of first light emitting elements 430 directed to the upper region of the projection lens 450 is partially deflected downward by the downward deflector 450c and is irradiated forward of the lamp, thereby achieving the low-beam light distribution pattern 2PL. It is possible to prevent the lower area from becoming too bright. Moreover, the light emitted from the downward deflector 450c can form the low-beam light distribution pattern 2PL as a light distribution pattern having a wide vertical width with its lower edge extended downward.
  • the low-beam light distribution pattern 2PL is formed on the road surface in front of the lamp, it is possible to prevent the short distance area from becoming too bright and the long distance area from becoming difficult to see. It is possible to irradiate an area in front of the lamp, which is positioned closer to the lamp than in the short range area. Thus, it is possible to sufficiently ensure forward visibility during low beam irradiation.
  • the vehicle lamp 410 configured to irradiate the light emitted from the plurality of first light emitting elements 430 through the projection lens 450 toward the front of the lamp, Sufficient forward visibility can be ensured.
  • the downward deflecting portion 450c is formed on the rear surface 450b of the projection lens 450, it is possible to precisely control the downward deflection of the light emitted from the plurality of first light emitting elements 430. can.
  • part of the direct light beams directed obliquely upward from the plurality of second light emitting elements 440 is incident on the downward deflecting portion 450c of the projection lens 450, thereby causing the area near the lower edge of the additional light distribution pattern 2PA.
  • 2PAa is formed so as to overlap with the cutoff vicinity area of the low-beam light distribution pattern 2PL. Therefore, the high beam light distribution pattern 2PH can be formed as a continuous light distribution pattern in which the low beam light distribution pattern 2PL and the additional light distribution pattern 2PA are connected without gaps.
  • the projection lens 450 is described as being composed of a plano-convex aspherical lens, but it is also possible to be composed of a biconvex lens, a convex meniscus lens, or the like. It is also possible to have a configuration having an outer shape of .
  • the lamp unit 420 is described as having eleven first light emitting elements 430 and nine second light emitting elements 440.
  • a configuration including two light emitting elements 440 is also possible.
  • the plurality of first light emitting elements 430 are arranged in a staggered manner, but it is also possible to arrange them in a horizontal row.
  • the light-emitting surfaces 430a and 440a of the plurality of first light-emitting elements 430 and the second light-emitting elements 440 are described as having a square outer shape. It is also possible to adopt a configuration having an outer shape such as a vertically elongated rectangular shape or a horizontally elongated rectangular shape.
  • the first reflector 432 and the second reflector 442 are arranged in order to effectively utilize the light emitted from the plurality of first light emitting elements 430 and second light emitting elements 440 .
  • a configuration in which either or both of the first reflector 432 and the second reflector 442 are not arranged is also possible.
  • the plurality of second light emitting elements 440 are lit all at once, but it is also possible to adopt a configuration in which the plurality of second light emitting elements 440 are individually lit.
  • each of the plurality of second light emitting elements 440 is turned on and off according to the driving conditions of the own vehicle, the driving road ahead can be illuminated as widely as possible without giving glare to the driver of the oncoming vehicle. It becomes possible to
  • FIG. 17 is a view similar to FIG. 13, showing a lighting unit 520 of a vehicle lighting device according to this modified example.
  • the basic configuration of the lamp unit 520 is similar to that of the lamp unit 420 shown in FIG. 17.
  • the projection lens 550 is composed of a plano-convex aspherical lens having a convex front surface 550a, and a downward deflector 550c is provided in the upper region 550b1 of the rear surface 550b of the projection lens 550. formed. It differs from the lamp unit 420 in that the downward deflector 550c is composed of a plurality of diffuser lens elements 550s.
  • the plurality of diffusing lens elements 550s are formed in a vertical striped pattern, and are configured to diffuse the light emitted from the plurality of first light emitting elements 430 in the horizontal direction.
  • FIG. 18A is a view perspectively showing a low-beam light distribution pattern 2PL-1 formed on the virtual vertical screen by light emitted from the lamp unit 520 toward the front of the lamp.
  • the low-beam light distribution pattern 2PL-1 spreads to both the left and right sides of the lower region of the low-beam light distribution pattern 2PL-1 compared to the low-beam light distribution pattern 2PL indicated by the chain double-dashed line in FIG. 18A. is formed as a large light distribution pattern. This is because the downward deflector 550c is composed of a plurality of diffuser lens elements 550s.
  • FIG. 18B is a perspective view showing a high beam light distribution pattern 2PH-1 formed on the virtual vertical screen by light emitted from the lamp unit 520 toward the front of the lamp.
  • the high beam light distribution pattern 2PH-1 is formed as a light distribution pattern in which the additional light distribution pattern 2PA-1 is added to the low beam light distribution pattern 2PL-1.
  • the additional light distribution pattern 2PA-1 is similar to the additional light distribution pattern 2PA indicated by the chain double-dashed line in FIG. It is formed as a light distribution pattern that overlaps with the off-line vicinity area.
  • the additional light distribution pattern 2PA-1 is formed as a light distribution pattern that expands to both the left and right sides of the lower edge vicinity region 2PA-1a more than the additional light distribution pattern 2PA. This is also due to the fact that the downward deflector 550c is composed of a plurality of diffusing lens elements 550s.
  • the low-beam light distribution pattern 2PL-1 as a light distribution pattern that widely and uniformly illuminates the area in front of the lamp on the road surface in front of the lamp.
  • the lower region of the additional light distribution pattern 2PA-1 overlaps the region near the cutoff line of the low-beam light distribution pattern 2PL-1 over a wider range. Therefore, the high beam light distribution pattern 2PH-1 can be formed as a continuous light distribution pattern in which the low beam light distribution pattern 2PL-1 and the additional light distribution pattern 2PA-1 are connected over a wider range without gaps.
  • FIG. 19 is a view, similar to FIG. 14, showing a lighting unit 620 of a vehicle lamp according to this modified example.
  • the basic configuration of the lamp unit 620 is similar to that of the lamp unit 420 shown in FIG.
  • the projection lens 650 is composed of a plano-convex aspherical lens having a convex front surface 650a, and a downward deflector 650c is provided in the upper region 650b1 of the rear surface 650b of the projection lens 650. formed.
  • the lamp unit 620 differs from the lamp unit 420 in that an upward deflection portion 650d that deflects the direct light from the plurality of first light emitting elements 430 upward is formed in a region adjacent to the lower side of the downward deflection portion 650c. .
  • the upward deflection portion 650d is formed of an inclined surface extending in the left-right direction while being inclined backward from the lower edge of the downward deflection portion 650c. It is connected.
  • the upward deflection angle for the light emitted from the plurality of first light emitting elements 430 is set by the backward inclination angle of the upward deflection portion 650d.
  • the optical path of the light reaching the downward deflecting portion 650c is the same as that of the lamp unit 420. .
  • the optical path of the light reaching the upward deflection section 650d is assumed to be It is emitted from the front surface 650a of the projection lens 650 as upward light from the optical path (the optical path indicated by the two-dot chain line in FIG. 19) if it is not formed.
  • FIG. 20A is a view perspectively showing a low beam light distribution pattern 2PL-2 formed on the virtual vertical screen by light emitted from the lamp unit 620 toward the front of the lamp.
  • the low-beam light distribution pattern 2PL-2 is formed as a light distribution pattern having a horizontally long bright portion 2Pb in its upper region.
  • the horizontally long bright portion 2Pb is formed by the light emitted from the plurality of first light emitting elements 430 and incident on the projection lens 650 through the upward deflection portion 650d, and then emitted from the front surface 650a of the projection lens 650 as upward light.
  • the low-beam light distribution pattern 2PL-2 having such a horizontally long bright portion 2Pb is a light distribution pattern with superior long-distance visibility compared to the low-beam light distribution pattern 2PL shown in FIG. 15A.
  • FIG. 20B is a view perspectively showing a high beam light distribution pattern 2PH-2 formed on the virtual vertical screen by light emitted from the lamp unit 620 toward the front of the lamp.
  • the high beam light distribution pattern 2PH-2 is formed as a light distribution pattern in which the additional light distribution pattern 2PA-2 is added to the low beam light distribution pattern 2PL-2.
  • the additional light distribution pattern 2PA-2 similarly to the additional light distribution pattern 2PA indicated by the two-dot chain line in FIG. It is formed as a light distribution pattern that overlaps with the cutoff vicinity area.
  • the additional light distribution pattern 2PA-2 is formed as a light distribution pattern whose upper region is expanded upward compared to the additional light distribution pattern 2PA. This is because the light emitted from the plurality of second light emitting elements 440 and incident on the projection lens 650 through the upward deflector 650d is emitted from the front surface 650a of the projection lens 650 as upward light.
  • the low-beam light distribution pattern 2PL-2 can enhance the effect of suppressing the brightness of the lower area.
  • the low-beam light distribution pattern 2PL-2 can be made excellent in long-distance visibility.
  • the low-beam light distribution pattern 2PL-2 can be formed as a light distribution pattern with excellent long-distance visibility.
  • FIG. 21 is a view, similar to FIG. 13, showing a lighting unit 720 of a vehicle lamp according to this modified example.
  • FIG. 22 is a view, similar to FIG. 14, showing a lamp unit 720 of a vehicle lamp according to this modified example.
  • the basic configuration of the lamp unit 720 is similar to that of the lamp unit 420 shown in FIG.
  • the projection lens 750 is composed of a plano-convex aspherical lens having a convex front surface 750a, and a downward deflector 750c is provided in the upper region 750b1 of the rear surface 750b of the projection lens 750. formed.
  • the projection lens 750 differs from the projection lens 450 of the lamp unit 420 in that it has a horizontally long outer shape when viewed from the front of the lamp. Also, along with this, the configurations of the lens holder 752 and the heat sink 754 are partially different from those of the lamp unit 420 .
  • the projection lens 750 has an outer shape obtained by cutting off the upper and lower portions of the projection lens 450 shown in FIG. 12 in the horizontal direction.
  • the lens holder 752 has a shape corresponding to the outer shape of the projection lens 750
  • the heat sink 754 has a shape corresponding to the outer shape of the lens holder 752 .
  • the projection lens 750 of this modified example has a horizontally long outer shape when viewed from the front of the lamp, the maximum downward angle of the emitted light from the projection lens 750 is limited. For this reason, it is difficult to ensure sufficient brightness in the region of the road surface in front of the lamp in front of the lamp. It is particularly effective to
  • the present invention is not limited to the configurations described in the first embodiment and its modifications, and the second embodiment and its modifications, and adopts configurations with various other modifications. It is possible.

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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)

Abstract

L'invention concerne une lampe de véhicule (10) pourvue d'une configuration dans laquelle une pluralité de premiers éléments électroluminescents (30) sont disposés côte à côte dans la direction droite-gauche et des surfaces électroluminescentes (30a) des premiers éléments électroluminescents (30) respectifs sont orientées vers une lentille de projecteur (50). Un voile (60) pour protéger une partie de la lumière émise par la pluralité de premiers éléments électroluminescents (30) est disposé entre la pluralité de premiers éléments électroluminescents (30) et la lentille de projecteur (50) afin de former une ligne de coupure d'un motif de distribution de feux de croisement. Un second voile (70) pour protéger une partie de la lumière directe se déplaçant à partir de la pluralité de premiers éléments électroluminescents (30) vers une région supérieure de la lentille de projecteur (50) est disposé entre la pluralité de premiers éléments électroluminescents (30) et la lentille de projecteur (50).
PCT/JP2022/034387 2021-09-21 2022-09-14 Lampe de véhicule WO2023048043A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2021-153004 2021-09-21
JP2021153004A JP2023044895A (ja) 2021-09-21 2021-09-21 車両用灯具
JP2021190929A JP2023077596A (ja) 2021-11-25 2021-11-25 車両用灯具
JP2021-190929 2021-11-25

Publications (1)

Publication Number Publication Date
WO2023048043A1 true WO2023048043A1 (fr) 2023-03-30

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PCT/JP2022/034387 WO2023048043A1 (fr) 2021-09-21 2022-09-14 Lampe de véhicule

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WO (1) WO2023048043A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005011608A (ja) * 2003-06-18 2005-01-13 Koito Mfg Co Ltd 車両用前照灯
JP2019036564A (ja) * 2018-12-05 2019-03-07 株式会社小糸製作所 車両用灯具
JP2019207774A (ja) * 2018-05-28 2019-12-05 株式会社小糸製作所 車両用灯具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005011608A (ja) * 2003-06-18 2005-01-13 Koito Mfg Co Ltd 車両用前照灯
JP2019207774A (ja) * 2018-05-28 2019-12-05 株式会社小糸製作所 車両用灯具
JP2019036564A (ja) * 2018-12-05 2019-03-07 株式会社小糸製作所 車両用灯具

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