WO2026014257A1 - Lampe de véhicule - Google Patents

Lampe de véhicule

Info

Publication number
WO2026014257A1
WO2026014257A1 PCT/JP2025/023053 JP2025023053W WO2026014257A1 WO 2026014257 A1 WO2026014257 A1 WO 2026014257A1 JP 2025023053 W JP2025023053 W JP 2025023053W WO 2026014257 A1 WO2026014257 A1 WO 2026014257A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
lens body
incident
light source
lens
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
PCT/JP2025/023053
Other languages
English (en)
Japanese (ja)
Inventor
達郎 赤津
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.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric 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 Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Publication of WO2026014257A1 publication Critical patent/WO2026014257A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F21S41/10—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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
    • F21S41/27—Thick 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
    • F21S41/60—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
    • 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]
    • 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
    • F21Y2115/30—Semiconductor lasers

Definitions

  • the present invention relates to a vehicle lamp.
  • This application claims priority based on Japanese Patent Application No. 2024-109708, filed July 8, 2024, the contents of which are incorporated herein by reference.
  • the light source image defined by the front edge of the shade is inverted and projected by a projection lens to form a low beam light distribution pattern that includes a cut-off line at the top edge for passing vehicular traffic (low beam).
  • a separate light source that emits light in the direction the vehicle is traveling is placed below the shade, and the light emitted from this light source is projected by a projection lens as a driving beam (high beam), forming a high beam light distribution pattern above the low beam light distribution pattern.
  • ADB adaptive beam headlamps
  • ADB is a technology that uses an onboard camera to recognize vehicles ahead, oncoming vehicles, pedestrians, etc., and expands the driver's forward visibility at night without dazzling the driver or pedestrians in front.
  • Patent Document 1 discloses a vehicle lamp comprising an optical system including a front lens body extending in a predetermined direction inclined at a predetermined angle with respect to the horizontal when viewed from the front, a rear lens portion arranged behind the front lens body, and a light source arranged behind the rear lens portion that emits light that passes through the rear lens portion and the front lens body in this order and is irradiated forward to form a headlamp light distribution pattern, wherein the rear lens portion is a lens portion that focuses light from the light source that passes through the rear lens portion in a first direction, and the front lens body is a lens portion that focuses light from the rear lens portion that passes through the front lens body in a second direction perpendicular to the first direction, and at least one light diffusion element is set in a region of the front lens body through which light from the optical system passes, for diffusing light from the optical system in at least one of the predetermined direction and a direction perpendicular to the predetermined direction.
  • This aspect of the present invention provides a vehicle lamp that allows for further miniaturization while also achieving a good light distribution pattern.
  • a light source that emits light radially forward; a first lens body disposed in front of the light source; a second lens body disposed in front of the first lens body, A vehicle lamp that projects light emitted from the light source toward a front of the vehicle through the first lens body and the second lens body, the first lens body includes a first incident portion located on a side facing the light source and a first exit portion located on an opposite side to the first incident portion, the first incident portion has a lens shape that causes the light emitted from the light source to enter the inside of the first lens body so that the light emitted from the light source is concentrated at a focusing point located inside the first lens body and then diffused from the focusing point toward the first exit portion, a first exit surface that refracts light from a central region including the optical axis of the light emitted from the light source in a diffusing direction toward the second lens body and emits the light to the outside of the first lens body, and a second exit surface that re
  • the first light exit surface is formed by a concave lens surface
  • the vehicle lamp according to [1] wherein the second light exit surface is formed by a ring-shaped convex lens surface that surrounds the periphery of the concave lens surface.
  • a composite focal point of the second lens body and the first light exit portion substantially coincides with the light-converging point.
  • the second lens body includes, in the cross section in the vertical direction, a second incident portion located on a side facing the first exit portion, and a second exit portion located on an opposite side to the second incident portion, the second incident portion refracts the light emitted from the first exit portion toward the optical axis, and the light enters the second lens body;
  • the vehicle lamp described in [1] is characterized in that the second exit portion refracts the light incident from the second entrance portion in a direction parallel to the optical axis and emits it to the outside of the second lens body.
  • the second incident portion has a first convex lens surface provided corresponding to an area into which the light emitted from the first exit surface is incident, and a second convex lens surface provided corresponding to an area into which the light emitted from the second exit surface is incident,
  • This aspect of the present invention provides a vehicle lamp that allows for further miniaturization and produces a good light distribution pattern.
  • FIG. 1 is a vertical cross-sectional view showing the configuration of a lamp unit provided in a vehicle lamp according to an embodiment of the present invention.
  • FIG. 2 is a horizontal cross-sectional view showing the configuration of the lamp unit shown in FIG. 1 .
  • 1 is a vertical cross-sectional view showing the configuration of a lamp unit shown in Example 1.
  • FIG. 3 is a luminous intensity distribution diagram showing a light distribution pattern formed by the lamp unit shown in Example 1.
  • FIG. 10 is a vertical cross-sectional view showing the configuration of a lamp unit shown in Comparative Example 1.
  • FIG. 10 is a luminous intensity distribution diagram showing a light distribution pattern formed by the lamp unit shown in Comparative Example 1.
  • FIG. 10 is a vertical cross-sectional view showing the configuration of a lamp unit shown in Comparative Example 2.
  • FIG. 10 is a luminous intensity distribution diagram showing a light distribution pattern formed by the lamp unit shown in Comparative Example 2.
  • FIGS. 1 and 2 a configuration of a vehicle lamp 1 shown in, for example, FIGS. 1 and 2 will be described.
  • 1 is a vertical cross-sectional view showing the configuration of a lamp unit 20 provided in the vehicle lamp 1.
  • FIG. 2 is a horizontal cross-sectional view showing the configuration of the lamp unit 20.
  • an XYZ Cartesian coordinate system is set up, with the X-axis direction representing the front-to-rear direction (length direction) of the vehicle lamp 1, the Y-axis direction representing the left-to-right direction (width direction) of the vehicle lamp 1, and the Z-axis direction representing the up-and-down direction (height direction) of the vehicle lamp 1.
  • the vehicle lamp 1 of this embodiment is a vehicle headlamp mounted on both corners of the front end of a vehicle (not shown), and emits a passing beam (low beam) that forms a low beam light distribution pattern including a cut-off line at the upper end, and a driving beam (high beam) that forms a high beam light distribution pattern above the low beam light distribution pattern, toward the front of the vehicle (in the +X-axis direction).
  • a passing beam low beam
  • high beam that forms a high beam light distribution pattern above the low beam light distribution pattern
  • the vehicle lamp 1 of this embodiment is an application of the present invention to an adjustable beam headlamp (ADB) that variably controls the light distribution pattern of light L projected toward the front of the vehicle.
  • ADB adjustable beam headlamp
  • this vehicle lamp 1 is equipped with an ADB lamp unit 20 arranged inside the lamp body (not shown).
  • these lamp units 20 are arranged in a row across the width of the vehicle (hereinafter referred to as the "vehicle width direction"), and by switching the illumination of each lamp unit 20 on and off, it is possible to variably control the light distribution pattern of the light L projected in front of the vehicle.
  • the lamp unit 20 of this embodiment comprises a light source 2 that radially emits light L forward, a first lens body 3 disposed in front of the light source 2, and a second lens body 4 disposed in front of the first lens body 3.
  • the lamp unit 20 of this embodiment has a configuration in which the optical axis AX of the light L emitted from the light source 2 coincides with the central axes of the first lens body 3 and the second lens body 4.
  • the light source 2 is, for example, a light-emitting diode (LED) that emits white light, and emits light L radially toward the first lens body 3 in front.
  • LED light-emitting diode
  • LDs laser diodes
  • the first lens body 3 is made of a light-transmitting material such as a transparent resin such as polycarbonate or acrylic, or glass.
  • the first lens body 3 has a substantially cylindrical light guide section 5 extending in a direction along the optical axis AX, a first entrance section 6 located on the side of the light guide section 5 facing the light source 2 (rear side), and a first exit section 7 located on the side of the light guide section 5 opposite the first entrance section 6 (front side).
  • the first incident section 6 has a lens shape that causes the light L emitted from the light source 2 to enter the inside of the light guide section 5 so that the light L is focused at a focusing point S1 on the optical axis AX located inside the light guide section 5 (first lens body 3), and then diffuses from this focusing point S1 towards the first incident section 7.
  • the first incident portion 6 has a first incident surface 6a located at the center of the portion of the light guide portion 5 facing the light source 2, on which light L1 from a central region E1 including the optical axis AX (hereinafter referred to as "first light”) enters while being focused toward a focusing point S1, out of the light L radially emitted from the light source 2; a second incident surface 6b located on the inner periphery of a protruding portion 5a that protrudes toward the light source 2 (rear side) from a position surrounding the periphery of the first incident surface 6a of the light guide portion 5, on which light L2 from a peripheral region E2 surrounding the periphery of the central region E1 (hereinafter referred to as "second light”) enters; and a reflecting surface 6c located on the outer periphery of the protruding portion 5a, which reflects the second light L2 incident from the second incident surface 6b while being focused toward the focusing point S1.
  • first light located at the center of
  • the first emission section 7 has a first emission surface 7a provided in correspondence with the central region E1 where the first light L1 of the light L emitted from the light source 2 is mainly incident, and a second emission surface 7b provided in correspondence with the peripheral region E2 where the second light L2 is mainly incident.
  • the first light exit surface 7a is formed by a concave lens surface with an inwardly curved concave shape at the center of the front side of the light guide unit 5.
  • the second light exit surface 7b is formed by a ring-shaped convex lens surface that curves outwardly and convexly, surrounding the periphery of this concave lens surface.
  • the first exit surface 7a emits the first light L1 to the outside of the first lens body 3 while refracting it mainly in a direction away from the optical axis AX toward the second lens body 4 in front (hereinafter referred to as the "diffusion direction").
  • the second exit surface 7b emits the second light L2 to the outside of the first lens body 3 while refracting it mainly in a direction approaching the optical axis AX toward the second lens body 4 in front (hereinafter referred to as the "converging direction").
  • the first exit surface 7a is not limited to the concave lens surface described above, and may be formed as a flat surface, so that the first light L1 is refracted in a diffusing direction and emitted toward the second lens body 4 in front.
  • the first emission section 7 is formed by a convex lens surface that is curved outward in a horizontal cross section (hereinafter referred to as the "horizontal cross section") that includes the optical axis AX of the light L emitted from the light source 2 of the light guide section 5.
  • the first emission section 7 emits the first and second light beams L1 and L2 (light L) to the outside of the first lens body 3 while concentrating them toward the second lens body 4 in front of it.
  • the second lens body 4 is made of a light-transmitting material such as a transparent resin such as polycarbonate or acrylic, or glass.
  • the second lens body 4 has a second incident portion 8 located on the side opposite the first exit portion 7 (rear side), and a second exit portion 9 located on the opposite side from the second incident portion 8 (front side).
  • the second incident portion 8 has a first convex lens surface 8a provided in correspondence with the central region E1 where the first light L1 emitted from the first exit surface 7a is mainly incident, and a second convex lens surface 8b provided in correspondence with the peripheral region E2 where the second light L2 emitted from the second exit surface 7b is mainly incident.
  • the first convex lens surface 8a has a greater positive refractive power than the second convex lens surface 8b.
  • the first convex lens surface 8a has a greater curvature than the second convex lens surface 8b and is curved outwardly convexly.
  • the second incident portion 8 refracts the first and second light beams L1 and L2 (light L) emitted from the first and second exit surfaces 7a and 7b (first exit portion 7) toward the optical axis AX, causing the light beams to enter the interior of the second lens body 4 from the first and second convex lens surfaces 8a and 8b.
  • the second incident portion 8 is formed by a convex lens surface that is curved outward in a convex shape in the horizontal cross section of the second lens body 4 shown in Figure 2.
  • the second incident portion 8 refracts the light L (first and second light L1, L2) in a direction parallel to the optical axis AX, causing the light to enter the interior of the second lens body 4.
  • the second emission section 9 is curved outwardly in a convex shape in the vertical cross section of the second lens body 4 shown in Figure 1, and is formed by a cylindrical lens surface extending horizontally in the horizontal cross section of the second lens body 4 shown in Figure 2.
  • the second emission portion 9 refracts the first and second light beams L1 and L2 (light L) incident on the first and second convex lens surfaces 8a and 8b (second incidence portion 8) in a direction parallel to the optical axis AX, and emits the light to the outside of the second lens body 4.
  • the second exit portion 9 emits the first and second light beams L1 and L2 (light L) incident on the first and second convex lens surfaces 8a and 8b (second entrance portion 8) to the outside of the second lens body 4 while maintaining the direction parallel to the optical axis AX.
  • the light L emitted from the second lens body 4 is projected toward the front of the vehicle while being collimated along the optical axis AX.
  • the light L emitted from the light source 2 is projected toward the front of the vehicle via the first lens body 3 and the second lens body 4 while being expanded. This makes it possible to project a light distribution pattern for ADB toward the front of the vehicle.
  • the distance from the rear end of the lamp unit 20 to the focal point S1 is D1
  • the distance from the front end of the lamp unit 20 to the focal point S2 on the rear side of the second lens body 4 is D2
  • the distance between the focal point S1 and the focal point S2 is D3
  • the distance D2 to the rear focal point S2 of the second lens body 4 is shortened, thereby making the overall length T of the lamp unit 20 shorter than in conventional configurations.
  • a first exit surface 7a is provided in the vertical cross section of the first lens body 3 shown in FIG. 1, which corresponds to the central region E1 of the first lens body 3 where the first light L1 of the light L emitted from the light source 2 is mainly incident, and which refracts the first light L1 in a diffusing direction. This causes the composite focal point on the rear side of the second lens body 4 and the first exit portion 7 to approximately coincide with the light collection point S1.
  • the composite focus "approximately coincides" with the focal point S1 does not necessarily mean that the composite focus is located at the focal point S1 on the optical axis, but rather that the composite focus is located within ⁇ 5 mm in front of or behind the focal point S1 on the optical axis.
  • the lamp unit 20 of this embodiment is configured to have a first exit surface 7b that refracts the second light L2 in a converging direction, corresponding to the peripheral area E2 of the first lens body 3 where the second light L2 is mainly incident. This allows the second light L2 to enter the second lens body 4, making it possible to maintain the utilization efficiency of the light L emitted from the first exit portion 7.
  • the lamp unit 20 of this embodiment can reduce the overall length T while preventing the light distribution pattern from spreading in the vertical direction.
  • the vehicle lamp 1 of this embodiment can be made even more compact and can also produce a good light distribution pattern.
  • the present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
  • the first lens body 3 and the second lens body 4 are arranged separately, but the first lens body 3 and the second lens body 4 may also be connected via a connecting portion.
  • the lamp units 20 are arranged in a row in the vehicle width direction, it is possible to form a single integrated configuration for the multiple second lens bodies 4 arranged in the vehicle width direction.
  • Example 1 In Example 1, in the configuration of the lamp unit 20 shown in FIG. 3, the total length T is set to 61 mm, the distance D1 is set to 24 mm, the distance D2 is set to 30 mm, the distance D3 is set to 7 mm, and the distance D4 is set to 37 mm.
  • Figure 4 shows the light distribution pattern obtained by simulation when light L emitted in front of the lamp unit 20 is projected onto a virtual vertical screen directly facing the lamp unit 20.
  • the lamp unit 20A of Comparative Example 1 has a conventional configuration, with the first light output section 7 formed by a single convex lens surface 7c to match the distance D4. This allows the combined focal point on the rear side of the second lens body 4 and first light output section 7 to coincide with the light convergence point S1 without shortening the overall length T.
  • Figure 6 shows the light distribution pattern obtained by simulation when light L emitted in front of the lamp unit 20A is projected onto a virtual vertical screen directly facing the lamp unit 20A.
  • first light exit portion 7 is formed by one convex lens surface 7c.
  • Lamp unit 20B of Comparative Example 2 has a shorter overall length T than lamp unit 20A of Comparative Example 1, and in order to keep distance D1 unchanged, distance D4 is shortened. That is, distance D4 is the distance to the combined focal point (focus point S1) on the rear side of the second lens body 4 and first emission portion 7, so the curvature of convex lens surface 7c is greater than in Comparative Example 1 to shorten this combined focal point. On the other hand, because the curvature of the first entrance portion 6 and first emission portion 7 of the second lens body 4 remains unchanged, distance D2 to the focal point S2 on the rear side of the second lens body 4 is the same as in Comparative Example 1.
  • Figure 8 shows the light distribution pattern obtained by simulation when light L emitted in front of lamp unit 20B is projected onto a virtual vertical screen directly facing lamp unit 20B.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Une lampe de véhicule selon la présente invention comprend une source de lumière (2), un premier corps de lentille (3) et un second corps de lentille (4). Le premier corps de lentille (3) comprend une première partie d'entrée (6) et une première partie d'émission (7) ; la première partie d'entrée (6) présente une forme de lentille qui permet à la lumière (L) émise par la source de lumière (2) d'entrer dans le premier corps de lentille (3) de telle sorte que la lumière (L) émise par la source de lumière (2) converge au niveau d'un point focal (S1) positionné dans le premier corps de lentille (3), puis soit diffusée depuis le point focal (S1) vers la première partie d'émission (7) ; et la première partie d'émission (7) comporte une première surface d'émission (7a) depuis laquelle la lumière (L1) qui est incluse dans la lumière (L) émise par la source de lumière (2) et qui se trouve dans une région centrale (E1) comprenant l'axe optique (AX) est émise tout en étant réfractée dans la direction de diffusion et une seconde surface d'émission (7b) depuis laquelle la lumière (L2) qui se trouve dans une région (E2) entourant la région centrale (E1) est émise tout en étant réfractée dans la direction de convergence.
PCT/JP2025/023053 2024-07-08 2025-06-26 Lampe de véhicule Pending WO2026014257A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024-109708 2024-07-08
JP2024109708A JP2026009670A (ja) 2024-07-08 2024-07-08 車両用灯具

Publications (1)

Publication Number Publication Date
WO2026014257A1 true WO2026014257A1 (fr) 2026-01-15

Family

ID=98386646

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2025/023053 Pending WO2026014257A1 (fr) 2024-07-08 2025-06-26 Lampe de véhicule

Country Status (2)

Country Link
JP (1) JP2026009670A (fr)
WO (1) WO2026014257A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017091816A (ja) * 2015-11-10 2017-05-25 市光工業株式会社 車両用灯具
JP2022179096A (ja) * 2021-05-21 2022-12-02 スタンレー電気株式会社 車両用灯具
JP2024039557A (ja) * 2022-09-09 2024-03-22 株式会社小糸製作所 灯具ユニット

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017091816A (ja) * 2015-11-10 2017-05-25 市光工業株式会社 車両用灯具
JP2022179096A (ja) * 2021-05-21 2022-12-02 スタンレー電気株式会社 車両用灯具
JP2024039557A (ja) * 2022-09-09 2024-03-22 株式会社小糸製作所 灯具ユニット

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