EP4653757A1 - Phare de véhicule - Google Patents

Phare de véhicule

Info

Publication number
EP4653757A1
EP4653757A1 EP24744579.4A EP24744579A EP4653757A1 EP 4653757 A1 EP4653757 A1 EP 4653757A1 EP 24744579 A EP24744579 A EP 24744579A EP 4653757 A1 EP4653757 A1 EP 4653757A1
Authority
EP
European Patent Office
Prior art keywords
light
lighting unit
projection lens
lighting
lighting fixture
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
EP24744579.4A
Other languages
German (de)
English (en)
Inventor
Shoji Fujita
Ryuho Sato
Yuta Ugajin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Publication of EP4653757A1 publication Critical patent/EP4653757A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—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
    • F21S41/30—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
    • 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
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • 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
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • F21S41/29—Attachment thereof
    • F21S41/295—Attachment thereof specially adapted to projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • 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

Definitions

  • the invention of the present application relates to a vehicle lighting fixture in which first and second lighting units, each having different light distribution functions, are arranged side by side in a left-right direction.
  • a vehicle lighting fixture configured to include first and second lighting units, each having different light distribution functions, that are arranged side by side in a left-right direction.
  • each of the first and second lighting units is configured to cause light emitted from a light source to be emitted forward of the lighting fixture via a projection lens.
  • Patent Literature 1 describes a configuration in which the projection lenses of the first and second lighting units are constituted by a single lens member.
  • the projection lenses of the first and second lighting units are constituted by single lens members as in the case of the lighting fixture for a vehicle described in the above-mentioned Patent Literature 1, whereby it is possible to enhance the design of lighting fixtures for vehicles, and also it is possible to reduce the number of parts.
  • part of direct light from the light source of one of the first and second lighting units, each having different light distribution functions, is incident onto the projection lens of the other lighting unit.
  • light is incident onto the projection lens of the lighting unit having the different light distribution function in this way, glare light is likely to occur or uneven light distribution such as light streaks is likely to occur on a road surface in front of the lighting fixture.
  • the invention of the present application has been made in consideration of the above circumstances, and has an object to provide a vehicle lighting fixture in which first and second lighting units, each having different light distribution functions, are arranged side by side in a left-right direction, the lighting fixture for a vehicle being capable of preventing in advance occurrence of glare light or occurrence of uneven light distribution such as light streaks on the road surface in front of the lighting fixture even when the projection lenses of the first and second lighting units are constituted by single lens members.
  • the invention of the present application is intended to attain the above object by providing a configuration in which a predetermined light shielding member is disposed between a first lighting unit and a second lighting unit.
  • first and second lighting units each having different light distribution functions, are arranged side by side in a left-right direction
  • vehicle lighting fixture is not particularly limited in terms of the specific light distribution function of each of the first and second lighting units and the number of units to be arranged as long as the first and second lighting units, each having different light distribution functions, are arranged side by side in the left-right direction.
  • the above-mentioned "light-blocking member” is not particularly limited in terms of the specific configuration thereof as long as it has the first side surface portion for preventing direct light from the first light source from entering the second projection lens and the second side surface portion for preventing direct light from the second light source from entering the first projection lens.
  • the vehicle lighting fixture of the invention of the present application is configured such that first and second lighting units, each having different light distribution functions, are arranged side by side in the left-right direction, the first lighting unit is configured to cause light emitted from the first light source to be emitted forward of the lighting fixture via the first projection lens, and the second lighting unit is configured to cause light emitted from the second light source to be emitted forward of the lighting fixture via the second projection lens.
  • first projection lens and the second projection lens are configured by the single lens member, so that it is possible to enhance the design of the vehicle lighting fixture and also reduce the number of parts.
  • the light shielding member including the first side surface portion for preventing direct light from the first light source from entering the second projection lens and the second side surface portion for preventing direct light from the second light source from entering the first projection lens is arranged between the first lighting unit and the second lighting unit, thereby making it possible to prevent, in advance, occurrence of glare light and occurrence of uneven light distribution such as light streaks on the road surface in front of the lighting unit that are caused by light being incident onto the projection lens of the lighting unit having a different light distribution function.
  • the projection lenses of the first and second lighting units are configured by the single lens member in the vehicle lighting fixture in which the first and second lighting units, each having different light distribution functions, are arranged side by side in the left-right direction, it can be prevented in advance that glare light occurs and uneven light distribution such as light streaks occurs on the road surface in front of the lighting fixture.
  • first and second side surface portions of the light shielding member are configured as light diffusing surfaces
  • direct light that is emitted from the first light source and then reflected by the first side surface portion of the light shielding member can be effectively restrained from entering the first projection lens
  • direct light that is emitted from the second light source and then reflected by the second side surface portion of the light shielding member can also be effectively restrained from entering the second projection lens.
  • the arrangement of the light shielding member adversely affects the light distribution pattern formed by the light emitted from each of the first and second lighting units.
  • the surface shape of the light diffusing surface is not limited to a specific surface shape, and for example, a surface shape that has been subjected to a light diffusing treatment such as embossing or frosting, a surface shape in which a plurality of light diffusion elements is formed in a striped pattern, and the like can be adopted.
  • the configuration includes a lens holder for supporting the first and second projection lenses, and further the light shielding member is formed integrally with this lens holder, the positional accuracy of the light shielding member can be sufficiently ensured, thereby enhancing the light shielding function of the light shielding member.
  • the first lighting unit is a lighting unit for forming a low-beam light distribution pattern
  • the rear surface of the first projection lens thereof has a convex-curved horizontal sectional shape
  • the first projection lens is configured such that the rear surface thereof has a convex-curved horizontal sectional shape, whereby it is possible to perform deflection control of the first projection lens on the light emitted from the first light source with high accuracy.
  • part of direct light from the second light source is incident to the first projection lens, which tends to cause uneven light distribution such as light streaks to occur on a road surface in front of the lighting fixture in a light distribution pattern formed by light irradiated from the second lighting unit, so that it is particularly effective to adopt the configuration of the invention of the present application.
  • the first lighting unit when configured to include a first reflector for reflecting light emitted from the first light source toward the first projection lens, and a shade for shielding part of light reflected from the first reflector in a state where the shade is arranged between the first reflector and the first projection lens, the second lighting unit is configured to include a second reflector for reflecting light emitted from the second light source toward the second projection lens, and further the first and second reflectors and the shade are formed integrally with the lens holder, it is possible to perform light distribution control on each of the first and second lighting units with high accuracy and also reduce the number of parts of the vehicle lighting fixture.
  • FIG. 1 is a front view showing a vehicle lighting fixture 10 according to an embodiment of the invention of the present application.
  • FIG. 2 is a plan view showing a lighting unit assembly 20 of the vehicle lighting fixture 10.
  • the direction indicated by X represents “forward direction of the lighting fixture”
  • the direction indicated by Y is “leftward direction” perpendicular to “the forward direction of the lighting fixture” ("rightward direction” in a front view of the lighting fixture)
  • the direction indicated by Z is “upward direction”. This is the same in other figures besides FIGS. 1 and 2 .
  • the vehicle lighting fixture 10 is configured such that the lighting unit assembly 20 is accommodated in a lamp chamber formed by a lamp body 12 and a plain translucent cover 14 attached to a front-end opening portion of the lamp body 12.
  • the lighting unit assembly 20 is configured such that a pair of left and right first lighting units 22A, 22B and a second lighting unit 22C is formed integrally with each other.
  • the first lighting units 22A, 22B and the second lighting unit 22C are all configured as projector-type lighting units, and are arranged side by side in the left-right direction (i.e., the vehicle width direction). In this case, the first lighting unit 22A is located on the right side of the second lighting unit 22C, and the first lighting unit 22B is located on the left side of the second lighting unit 22C.
  • the vehicle lighting fixture 10 is configured such that a low-beam light distribution pattern is formed by light irradiated from a pair of left and right first lighting units 22A, 22B, and also a high-beam light distribution pattern is formed by adding light irradiated from the second lighting unit 22C (this will be described later).
  • FIG. 3 is a sectional view taken along line III-III in FIG. 2
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 2 .
  • the first lighting unit 22A on the right side includes a projection lens 32A having an optical axis Ax extending in the front-rear direction of the lighting fixture, a light source 34A that is arranged rearward of a rear-side focal point (more precisely, the rear-side focal point in a vertical section) F of the projection lens 32A in the lighting fixture, a reflector 36A for reflecting light emitted from the light source 34A toward the projection lens 32A in a state where the reflector 36A is arranged to cover the light source 34A from above, and a shade 38A for shielding part of the light reflected from the reflector 36A in a state where the shade 38A is arranged between the reflector 36A and the projection lens 32A.
  • the projection lens 32A is a biconvex lens that is arranged to be inclined to the right side with respect to the forward direction of the lighting fixture, and is configured to project a light source image formed on a rear-side focal plane, which is a focal plane containing the rear-side focal point F, as an inverted image onto a virtual vertical screen in front of the lighting fixture.
  • a front surface 32Aa of the projection lens 32A has a convex-curved vertical sectional shape and also a convex-curved horizontal sectional shape inclined to the right side.
  • a rear surface 32Ab of the projection lens 32A has a linear vertical sectional shape and a convex-curved horizontal sectional shape inclined to the right side.
  • the light source 34A is a light-emitting element (specifically, a white light-emitting diode) and has a horizontally elongated rectangular light-emitting surface 34Aa.
  • the light source 34A is arranged with the light-emitting surface 34Aa facing upward on the optical axis Ax.
  • the reflector 36A is configured to cause the light emitted from the light source 34A to be incident into the projection lens 32A as convergent light.
  • a reflecting surface 36Aa of the reflector 36A is configured as a curved surface having a substantially ellipsoidal shape with the light emission center of the light source 34A as a first focal point, and the eccentricity is set to gradually increase from the vertical section to the horizontal section.
  • the reflector 36A converges the light emitted from the light source 34A to a point located forward of the rear-side focal point F in the vertical section, and displaces the convergent position further forward of the lighting fixture in the horizontal section.
  • the reflecting surface 36Aa of the reflector 36A is formed such that its right region extends to a position further forward of the lighting fixture than its left region.
  • the shade 38A has an upward reflecting surface 38Aa that reflects part of the reflected light from the reflector 36A upward toward the projection lens 32A.
  • a left-side area of the upward reflecting surface 38Aa which is located on a left side (a right side in a front view of the lighting fixture) of the optical axis Ax is configured by a horizontal plane containing the optical axis Ax, and a right-side area located on a right side of the optical axis Ax is configured by a horizontal plane that is located to be one-step lower than the left-side area via a short inclined surface.
  • a front edge 38Aa1 of the upward reflecting surface 38Aa extends from the rear-side focal point F to both the left and right sides so as to be curved forward of the lighting fixture.
  • the upward reflecting surface 38Aa is formed with a substantially constant front-to-rear width, and is also formed such that its rear edge is located forward of the front edge of the reflecting surface 36Aa of the reflector 36A in the lighting fixture.
  • the first lighting unit 22B on the left side includes a projection lens 32B, a light source 34B, a reflector 36B, and a shade 38B which are similar to the projection lens 32A, the light source 34A, the reflector 36A, and the shade 38A in the first lighting unit 22A on the right side.
  • the projection lens 32B has a shape having left-right symmetry with respect to the projection lens 32A
  • a reflecting surface 36Ba of the reflector 36B has a shape having left-right symmetry with respect to the reflecting surface 36Aa of the reflector 36A.
  • the second lighting unit 22C includes a projection lens 32C, a light source 34C, and a reflector 36C like the first lighting unit 22A, but it does not have such a shade 38A as included in the first lighting unit 22A.
  • a reflecting surface 36Ca of the reflector 36C in the second lighting unit 22C has a surface shape which is slightly different from that of the reflecting surface 36Aa of the reflector 36A in the first lighting unit 22A, and neither of the left region nor the right region extend forward of the lighting fixture.
  • the projection lens 32C of the second lighting unit 22C is configured as a cylindrical lens extending in a horizontal direction perpendicular to the front-rear direction of the lighting fixture.
  • the projection lens 32C has a front surface 32Ca having a convex-curved vertical sectional shape, and a rear surface 32Cb having a linear vertical sectional shape.
  • the projection lens 32C is formed such that both the left and right end portions of the front surface 32Ca thereof are smoothly connected to the front surfaces 32Aa, 32Ba of the projection lenses 32A, 32B of the first lighting units 22A, 22B, and the left and right end portions of the rear surface 32Cb thereof are connected to the rear surface 32Ab and a rear surface 32Bb of the projection lenses 32A, 32B.
  • the projection lenses 32A, 32B, and 32C of the first lighting unit 22A, 22B and the second lighting unit 22C are configured by a single lens member 30.
  • the lens member 30 has an outer peripheral flange portion 30a formed around its entire circumference.
  • the light sources 34A, 22B, and 34C of the first lighting units 22A, 22B and the second lighting unit 22C are supported by a common board 40 that is arranged to extend in the left-right direction along a horizontal plane.
  • This board 40 is supported on the upper surface of a metal heat sink 50.
  • the heat sink 50 includes a main body portion 52 extending in the left-right direction along a horizontal plane, and a plurality of heat dissipation fins 54 formed to extend downward at intervals in the left-right direction from the bottom surface of the main body portion 52.
  • the lens member 30 is supported by a resin lens holder 60.
  • the lens holder 60 has a vertical frame portion 60b extending along a vertical plane perpendicular to the front-rear direction of the lighting fixture. This vertical frame portion 60b is formed to have a horizontally elongated rectangular shape in a plan view of the lighting fixture.
  • the lens member 30 is fixed to the lens holder 60 in a state where the outer peripheral flange portion 30a thereof abuts against the vertical frame portion 60b of the lens holder 60 from the front side of the lighting fixture.
  • the lens holder 60 has a horizontal flange portion 60a extending along a horizontal plane so as to surround the outer peripheral edge portions of the reflectors 36A, 36B, and 36C in the first lighting units 22A, 22B and the second lighting unit 22C.
  • the three reflectors 36A, 36B, and 36C are formed integrally with the lens holder 60. Furthermore, the shades 38A, 38B of the first lighting units 22A, 30B are also formed integrally with the lens holder 60.
  • a light shielding member 62A is disposed between the first lighting unit 22A and the second lighting unit 22C on the right side
  • a light shielding member 62B is disposed between the first lighting unit 22B and the second lighting unit 22C on the left side.
  • Each of the pair of left and right light shielding members 62A, 62B is configured as a plate-like member formed to extend in the front-rear direction of the lighting fixture along a vertical plane.
  • the light shielding member 62A is configured to prevent direct light from the light source 34A of the first lighting unit 22A from entering the projection lens 32C of the second lighting unit 22C at a first side surface portion 62Aa constituting a right side surface portion of the light shielding member 62A, and also prevent direct light from the light source 34C of the second lighting unit 22C from entering the projection lens 22A of the first lighting unit 22A at a second side surface portion 62Ac constituting a left side surface portion of the light shielding member 62A.
  • the light shielding member 62B is configured to prevent direct light from the light source 34B of the first lighting unit 22B from entering the projection lens 32C of the second lighting unit 22C at a first side surface portion 62Bb constituting a left side surface portion of the light shielding member 62B, and also prevent direct light from the light source 34C of the second lighting unit 22C from entering the projection lens 22B of the first lighting unit 22B at a second side surface portion 62Bc constituting a right side surface portion of the light shielding member 62B.
  • the pair of left and right light shielding members 62A, 62B is formed integrally with the lens holder 60.
  • the light shielding member 62A has a front end portion connected to the vertical frame portion 60b of the lens holder 60, and a rear end portion connected to a boundary portion between the reflectors 36A, 36C of the first and second lighting units 22A, 22C.
  • the light shielding member 62B has a front end portion connected to the vertical frame portion 60b of the lens holder 60, and a rear end portion connected to a boundary portion between the reflectors 36B, 36C of the first and second lighting units 22B, 22C.
  • the lighting unit assembly 20 When the lighting unit assembly 20 is incorporated into the vehicle lighting fixture 10, the lighting unit assembly 20 is arranged in a state where the optical axis Ax of each of the first lighting units 22A, 22B and the second lighting unit 22C extends downward by approximately 0.5 to 0.6° forward of the lighting fixture with respect to the horizontal plane.
  • FIG. 5 is a perspective view showing a low-beam light distribution pattern PL-1 and a high-beam light distribution pattern PH-1 formed by light emitted from the vehicle lighting fixture 10.
  • the low-beam light distribution pattern PL-1 is a low-beam light distribution pattern of left light distribution, and cutoff lines CL1 and CL2 having a step therebetween in the left-right direction are formed at an upper end portion of the low-beam light distribution pattern.
  • cutoff lines CL1 and CL2 extend horizontally at different heights in the left-right direction with respect to a V-V line passing vertically through H-V which is a vanishing point in the forward direction of the lighting fixture.
  • a right-side portion of the V-V line is formed as an oncoming vehicle lane side cutoff line CL1
  • a left-side portion of the V-V line is formed as an own vehicle lane side cutoff line CL2 that is stepped up from the oncoming vehicle lane side cutoff line CL1 via an inclined portion.
  • an elbow point E which is the intersection point between the oncoming vehicle lane side cutoff line CL1 and the V-V line is located about 0.5 to 0.6° below H-V. This is because the optical axes Ax of the first and second lighting units 22A and 30B extend downward about 0.5 to 0.6° forward of the lighting fixture with respect to the horizontal plane.
  • the low-beam light distribution pattern PL-1 is formed as a composite light distribution pattern of a low-beam light distribution pattern PL-1A formed by light irradiated from the first lighting unit 22A on the right side and a low-beam light distribution pattern PL-1B formed by light irradiated from the first lighting unit 22B on the left side.
  • the light source image of the light source 34A that is formed on the rear-side focal plane of the projection lens 32A by the light from the light source 34A reflected by the reflector 36A is projected as an inverted projection image onto the virtual vertical screen by the projection lens 32A, thereby forming the low-beam light distribution pattern PL-1A, and the cutoff lines CL1, CL2 are formed as inverted projection images of the front edge 38a1 of the upward reflecting surface 38Aa of the shade 38A.
  • the low-beam light distribution pattern PL-1A is formed as a light distribution pattern in which the diffusion angle to the left side is larger than the diffusion angle to the right side. This is because the right-side region of the reflecting surface 36Aa of the reflector 36A of the first lighting unit 22A is formed to extend forward of the left region in the lighting fixture.
  • the low-beam light distribution pattern PL-1B is formed as a light distribution pattern in which the diffusion angle to the right side is larger than the diffusion angle to the left side. This is because the left region of the reflecting surface 36Ba of the reflector 36B of the first lighting unit 22B is formed to extend forward of the right region in the lighting fixture.
  • a small streaky light distribution pattern Sa indicated by a two-dot chain line is a light distribution pattern that would be formed when direct light from the light source 34A of the first lighting unit 22A enters the projection lens 32C of the second lighting unit 22C and then is emitted as stray light from this projection lens 32C assuming that the light shielding member 62A is not formed, and this small streaky light distribution pattern Sa is formed in the vicinity of a left end portion of the low-beam light distribution pattern PL-1A.
  • a small streaky light distribution pattern Sb indicated by a two-dot chain line is a light distribution pattern that would be formed when direct light from the light source 34B of the first lighting unit 22B enters the projection lens 32C of the second lighting unit 22C and then exists as stray light from this projection lens 32C assuming that the light shielding member 62B is not formed, and this small streaky light distribution pattern Sb is formed in the vicinity of a right end portion of the low-beam light distribution pattern PL-1B.
  • the lighting unit assembly 20 of the vehicle lighting fixture 10 is equipped with the light shielding members 62A, 62B, so that such streaky light distribution patterns Sa, Sb will not be formed.
  • the high-beam light distribution pattern PH-1 is formed as a light distribution pattern in which an additional light distribution pattern PA-1 formed by irradiation light from the second lighting unit 22C is added to the low-beam light distribution pattern PL-1.
  • the additional light distribution pattern PA-1 is a horizontally elongated light distribution pattern centered on H-V, and is formed so as to vertically straddle the cutoff lines CL1, CL2 of the low-beam light distribution pattern PL-1.
  • This additional light distribution pattern PA-1 is formed with a smaller left-right diffusion angle than the low-beam light distribution pattern PL-1.
  • a small streaky light distribution pattern ScA indicated by a two-dot chain line in FIG. 5 (b) is a light distribution pattern that would be formed when direct light from the light source 34C of the second lighting unit 22C enters the projection lens 22A of the first lighting unit 22A and then exists as stray light from this projection lens 22A assuming that the light shielding member 62A is not formed.
  • a small striped light distribution pattern ScB indicated by a two-dot chain line in FIG. 5(b) is a light distribution pattern that would be formed when direct light from the light source 34B of the first lighting unit 22B enters the projection lens 32C of the second lighting unit 22C, enters the projection lens 32B of the first lighting unit 22B from the projection lens 32C, and then exists as stray light from the projection lens 32B assuming that the light shielding member 62B is not formed.
  • the pair of left and right light distribution patterns ScA, ScB is formed to be located outward of the pair of left and right light distribution patterns Sa, Sb.
  • the rear surface 32Cb of the projection lens 32C has a linear horizontal sectional shape
  • the rear surfaces 32Ab, 32Bb of the projection lenses 32A, 32B have convex-curved horizontal sectional shapes.
  • the light shielding members 62A, 62B are formed in the lighting unit assembly 20 of the vehicle lighting fixture 10, so that such streaky light distribution patterns Sa, Sb, ScA, ScB are not formed.
  • the vehicle lighting fixture 10 is configured such that the first lighting units 22A, 22B and the second lighting unit 22C which have different light distribution functions are arranged side by side in the left-right direction.
  • the first lighting units 22A, 22B are configured to cause light emitted from the light sources 34A, 34B (first light sources) to be emitted forward of the lighting fixture via the projection lenses 32A, 32B (first projection lenses)
  • the second lighting unit 22C is configured to cause light emitted from the light source 34C (second light source) to be emitted forward of the lighting fixture via the projection lens 32C (second projection lens).
  • the three projection lenses 32A, 32B, 30C are configured by the single lens member 30, it is possible to enhance the design of the vehicle lighting fixture 10 and reduce the number of parts.
  • the light shielding members 62A, 62B having the first side surface portions 62Aa, 62Bb for preventing direct light from the light source 34A, 34B from entering the projection lens 32C and the second side surface portions 62Ac, 62Bc for preventing direct light from the light source 34C from entering the projection lens 32A, 32B are arranged between the first lighting units 22A, 22B and the second lighting units 22C.
  • the vehicle lighting fixture 10 in which the first lighting units 22A, 22B and the second lighting unit 22C having the different light distribution functions are arranged side by side in the left-right direction, even though the projection lenses 32A, 32B of the first lighting units 22A, 22B and the projection lens 32C of the second lighting unit 22C are configured by the single lens member 30, it is possible to prevent, in advance, occurrence of uneven light distribution such as light streaks and occurrence of glare light on the road surface in front of the lighting fixture.
  • the vehicle lighting fixture 10 of the present embodiment is equipped with the lens holder 60 for supporting the lens member 30, and the light shielding members 62A, 62B are formed integrally with the lens holder 60, so that the positional accuracy of the light shielding members 62A, 62B can be sufficiently ensured, which makes it possible to improve the light shielding function of the light shielding members 62A, 62B.
  • the first lighting units 22A, 22B are lighting units for forming the low-beam light distribution pattern PL-1, and the rear surfaces 32Ab, 32Bb of the projection lenses 32A, 32B have a convex-curved horizontal sectional shape, so that the following action and effect can be obtained.
  • the projection lenses 32A, 32B such that the rear surfaces 32Ab, 32Bb thereof have a convex-curved horizontal sectional shape, it is possible to perform accurate deflection control of 32A, 32B the projection lenses on the light emitted from the light sources 34A, 34B.
  • part of direct light from the light source 34C is incident onto the projection lenses 32A, 32B, which tends to cause uneven light distribution such as light streaks to occur on the road surface in front of the lighting fixture in the additional light distribution pattern light distribution pattern PA-1 formed by the light irradiated from the second lighting unit 22C. Therefore, it is particularly effective to adopt the configuration of the present embodiment.
  • the vehicle lighting fixture 10 is configured to include, as the first lighting units 22A, 22B, the reflectors 36A, 36B for reflecting the light emitted from the light sources 34A, 34B toward the projection lenses 32A, 32B, and the shades 38A, 38B for shielding part of the light reflected from the reflectors 6A, 36B in a state where the shades 38A, 38B are disposed between the reflectors 6A, 36B and the projection lenses 32A, 32B, and also configured to include, as the second lighting unit 22c, the reflector 36C for reflecting the light emitted from the light source 34C toward the projection lens 32C.
  • the reflectors 36A, 36B, 36C and the shades 38A, 38B are formed integrally with the lens holder 60, it is possible to perform light distribution control with high accuracy on each of the first lighting units 22A, 22B and the second lighting unit 22C, and it is also possible to further reduce the number of parts of the vehicle lighting fixture 10.
  • the pair of left and right light shielding members 62A, 62B has been described as being formed integrally with the lens holder 60, but it is also possible to adopt a configuration in which these light shielding members 62A, 62B are fixed to the lens holder 60 by adhesion, engagement, or the like.
  • the lighting unit assembly 20 has been described as including the pair of left and right first lighting units 22A, 22B, but it is also possible to adopt a configuration in which a single first lighting unit or three or more first lighting units are included.
  • FIG. 6 is a view similar to FIG. 1 , and shows a vehicle lighting fixture 110 relating to this modification.
  • the basic configuration of the present modification is similar to that of the above embodiment, but the configuration of a pair of left and right light shielding members 162A, 162B in the lighting unit assembly 120 is partially different from that of the above embodiment.
  • first side surface portions 162Aa, 162Bb and second side surface portions 162Ac, 162Bc of the pair of left and right light shielding members 162A, 162B are configured as light diffusing surfaces.
  • a plurality of light diffusion elements 162As is formed in a horizontal-stripe shape on the first and second side surface portions 162Aa, 16Ac of the light shielding member 162A
  • a plurality of light diffusion elements 162Bs is formed in a horizontal-stripe shape on the first and second side surface portions 162Ba, 16Bc of the light shielding member 162B.
  • the light shielding member 162A is configured to prevent direct light from the light source 34A of the first lighting unit 22A from entering the projection lens 32C at the first side surface portion 162Aa of the light shielding member 162A and further reflect the direct light from this light source 34A as diffused light, and also configured to prevent direct light from the light source 34C of the second lighting unit 22C from entering the projection lens 32A at the second side surface portion 162Ac of the light shielding member 162A and further reflect the direct light from this light source 34C as diffused light.
  • the light shielding member 162B is configured to prevent direct light from the light source 34B of the first lighting unit 22B from entering the projection lens 32C at the first side surface portion 162Ba of the light shielding member 162B, and further reflect the direct light from this light source 34B as diffused light, and also configured to prevent direct light from the light source 34C of the second lighting unit 22C from entering the projection lens 32B at the second side surface portion 162Bc of the light shielding member 162B, and further reflect the direct light from this light source 34C as diffused light.
  • a plurality of light diffusion elements 162As is formed in a horizontal stripe shape on the first and second side surface portions 162Aa, 162Ac of the light shielding member 162A
  • a plurality of light diffusion elements 162Bs is formed in a horizontal stripe shape on the first and second side surface portions 162Ba, 162Bc of the light shielding member 162B.
  • a light diffusion treatment such as embossing or frosting has been applied.
  • FIG. 7 is a view similar to FIG. 2 , and shows a lighting unit assembly 220 of a vehicle lighting fixture according to the present modification.
  • the lighting unit assembly 220 shown in FIG. 7 is a lighting unit assembly of a vehicle lighting fixture arranged at the right front end portion of the vehicle.
  • the lighting unit assembly 220 of the present modification is configured such that a first lighting unit 222A and a second lighting unit 222C which have different light distribution functions are arranged side by side in the left-right direction, and projection lenses 232A, 232C thereof are configured by a single lens member 230, but the shape thereof is different from that of the above embodiment.
  • the projection lens 232A of the first lighting unit 222A is formed such that a front surface 232Aa thereof has a convex-curved vertical sectional shape and extends linearly in a direction that is inclined outward (that is, rightward) in the vehicle width direction toward the rear side of the lighting fixture, and a rear surface 232Ab thereof has a linear vertical sectional shape and also has a convex-curved horizontal sectional shape that is inclined rightward.
  • the projection lens 232C of the second lighting unit 222C is configured such that a front surface 232Ca thereof is formed in a convex-curved shape and a rear surface 232Cb thereof is configured by a vertical surface perpendicular to the front-rear direction of the lighting fixture.
  • the projection lens 232C is formed so as to be smoothly connected to the front surface 232Aa of the projection lens 232A of the first lighting unit 222A at the right end portion of the front surface 232Ca of the projection lens 232C, and also formed to be connected to the rear surface 232Ab of the projection lens 232A at the right end portion of the rear surface 232Cb of the projection lens 232C.
  • the configurations of a light source 234A, a reflector 236A, and a shade 238A of the first lighting unit 222A are substantially similar to those in the above embodiment, and the configurations of a light source 234C and a reflector 236C of the second lighting unit 222C are also substantially similar to those in the above embodiment, but are arranged in a state of being relatively displaced forward of the lighting fixture.
  • the lighting unit assembly 220 of the present modification is configured such that a board 240A on which the light source 234A of the first lighting unit 222A is mounted, and a board 240C on which the light source 234C of the second lighting unit 222C is mounted are each supported by a main body portion 252 of a heat sink 250.
  • the lens member 230 is also supported by a lens holder 260.
  • a vertical frame portion 260b of the lens holder 260 is formed to be substantially U-shaped in a front view of the lighting fixture, and the lens member 230 is positioned in the vertical frame portion 260b.
  • the lens holder 260 includes a horizontal flange portion 260a that extends along the horizontal plane so as to surround the outer peripheral edge portions of the reflectors 236A, 236C of the first and second lighting units 222A, 222C.
  • the two reflectors 236A, 236C are formed integrally with the lens holder 260.
  • the shade 238A of the first lighting unit 222A is also formed integrally with the lens holder 260.
  • a light shielding member 262A is also arranged between the first lighting unit 222A and the second lighting unit 222C.
  • This light shielding member 262A is configured as a plate-like member that is formed to extend in the front-rear direction of the lighting fixture along a vertical plane, and is formed integrally with the lens holder 260.
  • the light shielding member 262A is configured to prevent direct light from the light source 234A of the first lighting unit 222A from entering the projection lens 232C of the second lighting unit 222C at a first side surface portion 262Aa constituting the right side surface portion of the light shielding member 262A, and also prevent direct light from the light source 234C of the second lighting unit 222C from entering the projection lens 232A of the first lighting unit 222A at a second side surface portion 262Ac constituting the left side surface portion of the light shielding member 262A.
  • FIG. 8 is a perspective view showing a low-beam light distribution pattern PL-2 and a high-beam light distribution pattern PH-2 formed by light emitted from the vehicle lighting fixture according to the present modification.
  • the low-beam light distribution pattern PL-2 is a light distribution pattern formed by light irradiated from the first lighting unit 22A, and has approximately the same shape as the low-beam light distribution pattern PL-1 formed in the above embodiment.
  • a small streaky light distribution pattern Sa-2 indicated by a two-dot chain line is a light distribution pattern that would be formed when direct light from the light source 234A of the first lighting unit 222A enters the projection lens 232C of the second lighting unit 222C and then is emitted as stray light from this projection lens 232C assuming that the light shielding member 362 is not formed, and is formed in the vicinity of the left end portion of the low-beam light distribution pattern PL-2.
  • the lighting unit assembly 220 includes the light shielding member 262A, so that such a streaky light distribution pattern Sa-2 will not be formed.
  • the high-beam light distribution pattern PH-2 is formed as a light distribution pattern in which an additional light distribution pattern PA-2 formed by light irradiated from the second lighting unit 222C is added to the low-beam light distribution pattern PL-2.
  • the additional light distribution pattern PA-2 has substantially the same shape as the additional light distribution pattern PA-1 formed in the above embodiment.
  • a small streaky light distribution pattern ScC indicated by a two-dot chain line in FIG. 8(b) is a light distribution pattern which would be formed when direct light from the light source 234C of the second lighting unit 222C enters the projection lens 232A of the first lighting unit 222A and then is emitted as stray light from this projection lens 232A assuming that the light shielding member 262A is not formed.
  • a light distribution pattern Sc-2 is formed outward of the right end portion of the high-beam light distribution pattern PH-2. This is because the rear surface 232A of the projection lens 232A has a convex-curved horizontal sectional shape, and thus direct light from the light source 234C enters the left end portion of the rear surface 232Ab.
  • the light shielding member 262A is formed in the lighting unit assembly 220, so that such a streaky light distribution pattern Sc-2 will not be formed.
  • the projection lens 232A of the first lighting unit 222A is inclined toward the rear side of the lighting fixture to be directed outward in the vehicle width direction, which causes streaky light unevenness to easily occur at a position apart from the high-beam light distribution pattern PH-2, so that it is particularly effective to prevent occurrence of streaky light unevenness by using the light shielding member 262A of the lighting unit assembly 220.
  • the second lighting unit 222B has been described as being a lighting unit for forming the additional light distribution pattern PA-2 of the high-beam light distribution pattern PH-2, but it is also possible to adopt, for example, a lighting unit for an adaptive driving beam or the like that is configured to be capable of forming a plurality of small light distribution patterns arranged in a line at positions overlapping with the cutoff lines CL1, CL2 of the low-beam light distribution pattern PL-2.
  • the invention of the preset application is not limited to the configurations described in the above embodiment and the modifications thereof, and configurations with various other alterations can be adopted.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP24744579.4A 2023-01-20 2024-01-12 Phare de véhicule Pending EP4653757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023007694A JP2024103397A (ja) 2023-01-20 2023-01-20 車両用灯具
PCT/JP2024/000556 WO2024154656A1 (fr) 2023-01-20 2024-01-12 Phare de véhicule

Publications (1)

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EP4653757A1 true EP4653757A1 (fr) 2025-11-26

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EP24744579.4A Pending EP4653757A1 (fr) 2023-01-20 2024-01-12 Phare de véhicule

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EP (1) EP4653757A1 (fr)
JP (1) JP2024103397A (fr)
CN (1) CN120530283A (fr)
WO (1) WO2024154656A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017189056A (ja) 2016-04-07 2017-10-12 トヨタ自動車株式会社 燃料電池車
JP2023007694A (ja) 2021-07-02 2023-01-19 株式会社デンソー 車両用制御装置、及びプログラム

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4671852B2 (ja) * 2005-12-08 2011-04-20 株式会社小糸製作所 車両用灯具
JP2007230374A (ja) * 2006-03-01 2007-09-13 Maruzen Denki Sangyo Kk 自転車用前照灯などの照明装置
JP4784587B2 (ja) * 2007-10-25 2011-10-05 市光工業株式会社 車両用灯具
JP5678792B2 (ja) * 2011-05-11 2015-03-04 市光工業株式会社 車両用灯具
JP6136250B2 (ja) * 2012-12-26 2017-05-31 スタンレー電気株式会社 車両用灯具
JP2020087685A (ja) * 2018-11-22 2020-06-04 株式会社小糸製作所 車両用灯具
JP7370713B2 (ja) * 2019-03-07 2023-10-30 株式会社小糸製作所 光学ユニット
JP7558547B2 (ja) * 2019-07-16 2024-10-01 株式会社朝日ラバー 光学部材、及びそれの製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017189056A (ja) 2016-04-07 2017-10-12 トヨタ自動車株式会社 燃料電池車
JP2023007694A (ja) 2021-07-02 2023-01-19 株式会社デンソー 車両用制御装置、及びプログラム

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2024154656A1

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JP2024103397A (ja) 2024-08-01
WO2024154656A1 (fr) 2024-07-25

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