WO2023074506A1 - 灯具 - Google Patents

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Publication number
WO2023074506A1
WO2023074506A1 PCT/JP2022/038997 JP2022038997W WO2023074506A1 WO 2023074506 A1 WO2023074506 A1 WO 2023074506A1 JP 2022038997 W JP2022038997 W JP 2022038997W WO 2023074506 A1 WO2023074506 A1 WO 2023074506A1
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WO
WIPO (PCT)
Prior art keywords
light guide
plate
shaped light
light
lamp
Prior art date
Application number
PCT/JP2022/038997
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
俊之 中村
京平 秋山
貴丈 戸塚
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
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to JP2023556364A priority Critical patent/JPWO2023074506A1/ja
Publication of WO2023074506A1 publication Critical patent/WO2023074506A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • 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
    • F21S41/29—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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/249—Light guides with two or more light sources being coupled into the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/27—Attachment thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/19—Arrangement or contour of the emitted light for regions other than high beam or low beam for curves
    • 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
    • F21W2102/30—Fog lights
    • 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/10—Position lights
    • 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/30—Hazard lights
    • 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/35—Brake lights
    • 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/45—Reversing lights
    • 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/55—Daytime running lights [DRL]
    • 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
    • F21Y2101/00—Point-like light sources
    • 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
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]
    • 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
    • F21Y2115/20—Electroluminescent [EL] light sources
    • 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 lamp, and more particularly to a lamp using a light guide.
  • a light guide is used as an optical system for emitting light from a light source with a required light distribution.
  • Patent Document 1 discloses a vehicle lamp in which a plurality of plate-like light guide elements are combined to form a thick light guide.
  • the individual light guide elements which are the constituent elements, can be made thin and thus can be easily molded. Therefore, the light guide and thus the vehicular lamp can be realized at low cost.
  • the lamp of Patent Document 1 can realize a low-cost light guide and further a vehicle lamp, but its light emission lacks novelty.
  • the present invention has been made in such a situation, and one of the exemplary purposes of certain aspects thereof is to provide a lighting fixture using a light guide that can present novel light emission at low cost.
  • a lighting device includes a light-emitting portion and a light guide body that guides and emits light incident from the light-emitting portion.
  • the light guide includes two plate-like light guides.
  • Each of the two plate-shaped light guides has two main surfaces and an incident surface and an output surface formed on side surfaces connecting the two main surfaces.
  • the main surfaces of the two plate-shaped light guides are at least partially in contact with each other, and at least one of the two main surfaces of the two plate-shaped light guides receives part of the incident light.
  • a plurality of optical elements are provided for emitting light from the main surface to the outside of the lamp.
  • FIG. 1 is a schematic front view of a lamp according to an embodiment
  • FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1
  • FIG. 2 is a plan view of the lamp unit of FIG. 1
  • 4(a) and 4(b) are diagrams showing the light guide of FIG. 1.
  • FIG. 5(a) and 5(b) are diagrams for explaining a method of assembling the light guide and the light guide of the light emitting section.
  • FIG. 2 is a front view for explaining how the lamp unit in FIG. 1 emits light
  • FIGS. 7A to 7D are diagrams showing modified examples of the light guide.
  • FIGS. 8A and 8B are diagrams showing modifications of the light guide of the light emitting section.
  • the lamps according to the embodiments are widely used, for example, as general lighting such as indoor and outdoor lighting, lamps mounted on automobiles, railroads, aircraft, ships, construction machines, etc., and various industrial and commercial lighting devices. Is possible.
  • the lamp is mounted on a vehicle such as an automobile, that is, a vehicle lamp.
  • vehicle lamp can be widely applied to various vehicle lamps such as clearance lamps, turn signal lamps, stop lamps, daytime running lamps, cornering lamps, hazard lamps, position lamps, back lamps, fog lamps, and head lamps. can.
  • FIG. 1 is a schematic front view of the lamp 10 according to the embodiment.
  • FIG. 2 is a cross-sectional view taken along line AA of FIG.
  • the lamp 10 is provided in a lamp chamber 16 formed by a lamp body 12, a transparent outer cover 14 attached to the lamp body 12 so as to cover an opening of the lamp body 12, and the lamp body 12 and the outer cover 14. and a lamp unit 18 .
  • the lamp unit 18 is supported by the lamp body 12 via a support member (not shown).
  • the lamp unit 18 includes a light emitting section 20, a light guide 22 that guides and emits the light from the light emitting section 20, and a reflector 24.
  • the light guide 22 is made of a translucent resin material such as acrylic resin or polycarbonate resin. The same applies to the light-emitting portion light guide 30, which will be described later.
  • the light guide 22 includes a first plate-shaped light guide 26 and a second plate-shaped light guide 28 provided below the first plate-shaped light guide 26 .
  • the first plate-shaped light guide section 26 has two main surfaces 26a and 26b facing each other.
  • Major surface 26a faces generally upward and major surface 26b faces generally downward. Therefore, it can be said that the main surface 26a is the upper surface and the main surface 26b is the lower surface.
  • the first plate-shaped light guide section 26 has a side surface 26c connecting two main surfaces 26a and 26b.
  • the first plate-shaped light guide section 26 has an incident surface 26d and an exit surface 26e, each forming a part of the side surface 26c.
  • the incident surface 26d generally faces the front of the lamp, and the exit surface 26e generally faces the rear of the lamp.
  • the first plate-shaped light guide section 26 is configured to emit at least part of the light incident from the entrance surface 26d from the exit surface 26e.
  • the second plate-shaped light guide section 28 has two main surfaces 28a and 28b facing each other.
  • Major surface 28a faces generally upward and major surface 28b faces generally downward. Therefore, it can be said that the main surface 28a is the upper surface and the main surface 28b is the lower surface.
  • the second plate-shaped light guide section 28 has a side surface 28c that connects the two main surfaces 28a and 28b.
  • the second plate-shaped light guide portion 28 has an incident surface 28d and an exit surface 28e, each forming a part of the side surface 28c.
  • the incident surface 28d generally faces the front of the lamp, and the exit surface 28e generally faces the rear of the lamp.
  • the second plate-shaped light guide portion 28 is configured to emit at least part of the light incident from the entrance surface 28d from the exit surface 28e.
  • the main surfaces of the first plate-shaped light guide portion 26 and the second plate-shaped light guide portion 28 are at least partially in contact with each other. That is, the downward main surface 26b of the first plate-shaped light guide 26 and the upward main surface 28a of the second plate-shaped light guide 28 are at least partially in contact with each other.
  • the main surfaces of the first plate-shaped light guide portion 26 and the second plate-shaped light guide portion 28 may be in contact only on the rear side of the lamp, and may not be in contact with each other on the front side of the lamp.
  • the main surfaces of the first plate-shaped light guide portion 26 and the second plate-shaped light guide portion 28 are in overall contact with each other. Specifically, the entire downward-facing main surface 26 b of the first plate-shaped light guide 26 is in contact with the upward-facing main surface 28 a of the second plate-shaped light guide 28 . In other words, the first plate-shaped light guide section 26 and the first plate-shaped light guide section 26 are laminated in their thickness direction.
  • the entrance surface 26d of the first plate-shaped light guide portion 26 and the entrance surface 28d of the second plate-shaped light guide portion 28 are flush, although not particularly limited.
  • the second plate-shaped light guide portion 28 protrudes forward of the lamp more than the first plate-shaped light guide portion 26 . Therefore, the exit surface 26e of the second plate-shaped light guide portion 28 is located in front of the lamp with respect to the exit surface 26e of the first plate-shaped light guide portion 26. As shown in FIG.
  • FIG. 3 is a plan view of the lamp unit 18.
  • the first plate-shaped light guide portion 26 and the second plate-shaped light guide portion 28 are curved according to the exterior design of the vehicle, but the shape is not particularly limited, and for example, they may extend linearly.
  • the extending direction (longitudinal direction) of the first plate-shaped light guide portion 26 and the second plate-shaped light guide portion 28 is substantially along the vehicle width direction, but this is not particularly limited either.
  • the light source 32 is, for example, an LED (light emitting diode).
  • the light source 32 may be an LD (laser diode), an organic or inorganic EL (electroluminescence) or other semiconductor light-emitting element, an incandescent bulb, a halogen lamp, a discharge bulb, or the like.
  • the light-emitting part light guide 30 includes a rod-shaped light guide (light pipe) 34 and (n ⁇ 1) rod-shaped side branches 36 .
  • the rod-shaped light guide portion 34 extends along the entrance surfaces 26d and 28d of the plate-shaped light guide portions 26 and 28 in the longitudinal direction of the entrance surfaces 26d and 28d.
  • a cross section perpendicular to the longitudinal direction of the rod-shaped light guide part 34 is circular in the present embodiment, but is not particularly limited.
  • the light source 32 is arranged to face the incident surface 32a, which is one end surface of the rod-shaped light guide portion 34. As shown in FIG. The light emitted by the light source 32 is incident on the rod-shaped light guide portion 34 through the incident surface 32a.
  • side branch portions 36 are connected to the peripheral surface 34b of the rod-shaped light guide portion 34 at intervals in the longitudinal direction of the rod-shaped light guide portion 34 .
  • the cross section of the side branch portion 36 perpendicular to the longitudinal direction is not particularly limited, it is circular in the present embodiment.
  • a light source 32 is arranged to face an incident surface 36 a that is an end surface of each side branch portion 36 . The light emitted from these light sources 32 is incident on the side branch portion 36 from the incident surface 36a, travels inside the side branch portion 36 while undergoing, for example, internal reflection, and is incident on the rod-shaped light guide portion 34 from the side branch portion 36 .
  • the light that has entered the rod-shaped light guide portion 34 directly from the light source 32 or via the side branch portion 36 travels inside the rod-shaped light guide portion 34 toward the end surface 34c on the opposite side of the incident surface 34a, for example, while internally reflecting.
  • the rod-shaped light guide 34 has a reflective element 34d such as a step on the side opposite to the plate-shaped light guides 26 and 28 (that is, on the rear side of the lamp). At least part of the light traveling inside the rod-shaped light guide 34 is reflected toward the plate-shaped light guides 26 and 28 by the reflective element 34d in the process.
  • the light reflected by the reflective element 34d is emitted from an emission surface 34e forming a part of the peripheral surface 34b of the rod-shaped light guide 34 and directed to the plate-shaped light guides 26 and 28, and is emitted from the emission surface 34e.
  • the light is incident on the plate-shaped light guide portions 26, 28 from 26d, 28d.
  • the light that has entered the rod-shaped light guide portion 34 is gradually emitted from the emission surface 34e in the course of being guided toward the end surface 34c. Therefore, for example, when light is incident on the rod-shaped light guide portion 34 only from the entrance surface 32a, which is one end surface, the farther from the entrance surface 32a (that is, closer to the end surface 34c), the smaller the amount of light that reaches. Therefore, the amount of light emitted from the exit surface 34e decreases as the distance from the entrance surface 32a increases.
  • the rod-shaped light guide portion 34 receives light from the lateral branch portion 36 connected to the peripheral surface 34b of the rod-shaped light guide portion 34 in addition to the incident surface 32a. This allows a sufficient amount of light to reach a place far away from the entrance surface 32a (for example, near the end surface 34c), and the amount of light emitted from the exit surface 34e is relatively uniform in the longitudinal direction. Become.
  • the light from the n light sources 32 is incident on the rod-shaped light guide portion 34 from the side branch portion 36 in addition to the incident surface 32a. Therefore, by lighting the n light sources 32 in order, sequential light emission can be realized.
  • FIG. 4(a) and (b) are diagrams showing the light guide 22.
  • FIG. FIG. 4A is a diagram of the light guide 22 viewed in a direction perpendicular to the main surfaces 26a and 28a.
  • FIG. 4(b) is a cross-sectional view taken along line BB of FIG. 4(a).
  • a plurality of optical elements 26f are provided on the main surface 26a of the first plate-shaped light guide portion 26. As shown in FIG.
  • the optical element 26f in this embodiment is a stippled step formed as a conical recess.
  • the light incident on the first plate-shaped light guide section 26 from the incident surface 26d travels inside the first plate-shaped light guide section 26 toward the output surface 26e while being internally reflected, for example.
  • a portion (L11) of the light traveling inside the first plate-shaped light guide portion 26 is emitted from the emission surface 26e toward the outside of the lamp.
  • At least another portion (L12, L13) of the light traveling inside the first plate-shaped light guide section 26 reaches the optical element 26f.
  • a part of the light (L12) that reaches the optical element 26f is refracted and emitted from the main surface 26a to the outside of the lamp.
  • At least another portion (L13) of the light reaching optical element 26f is reflected toward the opposite major surface 26b and exits major surface 26b.
  • the light (L13) emitted from the main surface 26b passes through the second plate-shaped light guide portion 28, reaches the reflector 24, is reflected by the reflecting surface 24a, and is emitted to the outside of the lamp.
  • a plurality of optical elements 28f are provided on the main surface 28a of the second plate-shaped light guide portion 28.
  • the optical element 28f of the present embodiment is a stippling step formed as a conical concave portion, like the optical element 26f of the first plate-shaped light guide portion 26. As shown in FIG.
  • the light incident on the second plate-shaped light guide section 28 from the incident surface 28d travels through the inside of the second plate-shaped light guide section 28 toward the output surface 28e while being internally reflected, for example.
  • a portion (L21) of the light traveling inside the second plate-shaped light guide portion 28 is emitted from the emission surface 28e to the outside of the lamp.
  • At least another portion (L22, L23) of the light traveling inside the second plate-shaped light guide 28 reaches the optical element 28f.
  • a part of the light (L22) that reaches the optical element 28f is refracted and emitted from the main surface 28a to the outside of the lamp. Light emitted from the main surface 28 a may pass through the first plate-shaped light guide section 26 .
  • At least another portion (L23) of the light reaching optical element 28f is reflected toward the opposite major surface 28b and exits major surface 28b.
  • the light (L23) emitted from the main surface 28b reaches the reflector 24, is reflected by the reflecting surface 24a, and is emitted to the outside of the lamp.
  • optical element 26f may emit at least a portion of the light that reaches it from the main surface 26a toward the outside of the lamp. good. Optical element 26f may also be provided on opposite major surface 26b in addition to or instead of major surface 26a.
  • optical element 28f is not limited to stippled steps, and may be, for example, grains or protrusions, as long as the optical element 28f emits at least part of the arriving light toward the outside of the lamp from the main surface 28a. good too.
  • Optical element 28f may also be provided on opposite major surface 28b in addition to or instead of major surface 28a.
  • only one of the first plate-shaped light guide portion 26 and the second plate-shaped light guide portion 28 may be provided with an optical element. That is, at least one of the main surfaces 26a and 26b of the first plate-shaped light guide section 26 may be provided with the optical element 26f, and the second plate-shaped light guide section 28 may be provided with no optical element. Alternatively, at least one of the main surfaces 28a and 28b of the second plate-shaped light guide section 28 may be provided with the optical element 28f, and the first plate-shaped light guide section 26 may be provided with no optical element.
  • both the plurality of optical elements 26f and the plurality of optical elements 28f have a higher density on the front side of the lamp than on the rear side of the lamp. Also, the density of the plurality of optical elements 28f is higher than the density of the plurality of optical elements 26f. For example, of the six rows of optical elements 28f extending in the vehicle width direction (vertical direction of the paper in FIG. 4A), the optical element 28f located on the furthest front side of the lamp (the left side of the paper in FIG. 4A).
  • the pitch of the plurality of optical elements 28f in the row is smaller than the pitch of the plurality of optical elements 26f in the row of the optical elements 26f positioned closest to the lamp front side among the three rows of the optical elements 26f extending in the vehicle width direction. It's becoming
  • optical element 26f and the optical element 28f may be stippled steps with different sizes.
  • the optical element 26f and the optical element 28f may be optical elements of different types.
  • optical element 26f may be a texture and optical element 28f may be a stippling step.
  • FIGS. 5(a) and 5(b) are diagrams explaining a method of assembling the light guide 22 and the light guide 30 of the light emitting section.
  • FIG. 5A is an exploded perspective view of the light guide 22, the light guide 30 of the light emitting section, and the reflector 24.
  • FIG. 5(b) is a perspective view showing a state in which the light guide 22 and the light guide 30 of the light emitting section are attached to the reflector 24.
  • FIG. 5A is an exploded perspective view of the light guide 22, the light guide 30 of the light emitting section, and the reflector 24.
  • FIG. 5(b) is a perspective view showing a state in which the light guide 22 and the light guide 30 of the light emitting section are attached to the reflector 24.
  • Each of the first plate-shaped light guide part 26, the second plate-shaped light guide part 28, and the light-emitting part light guide body 30 has at least one (in this example, a plurality of) protrusions 26g, 28g, and 30a provided with fixing holes.
  • the second plate-shaped light guide section 28, the light-emitting section light guide 30, and the first plate-shaped light guide section 26 are stacked in this order.
  • the main surface 26b of the first plate-shaped light guide portion 26 and the main surface 28a of the second plate-shaped light guide portion 28 are at least partially in contact with each other.
  • the projecting portion 26g of the first plate-shaped light guide portion 26 and the projecting portion 28g of the second plate-shaped light guide portion 28 sandwich the projecting portion 30a of the light guide 30 of the light emitting portion. In this state, the projections 26g, 30a and 28g are fastened together with the reflector 24. As shown in FIG.
  • first plate-shaped light guide section 26 , the second plate-shaped light guide section 28 and the light emitting section light guide body 30 are assembled to the reflector 24 .
  • the reflector 24 to which the first plate-shaped light guide portion 26 , the second plate-shaped light guide portion 28 and the light-emitting portion light guide body 30 are assembled is supported by the lamp body 12 .
  • FIG. 6 is a diagram for explaining how the lamp unit 18 emits light when the light source 32 is turned on.
  • FIG. 6 is a view of the lamp 10 as seen from the front side and slightly above.
  • FIG. 6 can also be said to be a diagram of the lamp 10 viewed in the direction of arrow P in FIG.
  • the light-emitting regions are schematically indicated by hatching.
  • the emission surface 26e of the first plate-shaped light guide portion 26 emits light to the front of the lamp to form a strip-shaped light emission region E1.
  • the emission surface 28e of the second plate-shaped light guide portion 28 emits light to the front of the lamp to form a strip-shaped light emission region E2. Due to the light emitting areas E1 and E2, the lamp 10 appears to emit light in the form of a thick belt.
  • a plurality of optical elements 26f (not shown in FIG. 6) on the main surface 26a of the first plate-shaped light guide portion 26 emit light forward of the lamp to form a plurality of dotted light emitting regions E3.
  • a plurality of optical elements 28f (not shown in FIG. 6) on the main surface 28a of the second plate-shaped light guide portion 28 emit light forward of the lamp to form a plurality of dotted light emitting regions E4.
  • the reflecting surface 24a of the reflector 24 emits the light reflected toward the reflector 24 by the optical elements 26f and 28f forward of the lamp. Therefore, a plurality of dotted light emitting regions E5 are formed on the reflecting surface 24a of the reflector 24. As shown in FIG.
  • the light guide 22 is composed of two plate-shaped light guides 26 and 28 .
  • the two plate-shaped light guides 26 and 28 may be laminated in the thickness direction. Since the light guide 22 is composed of the two plate-shaped light guides 26 and 28, the light guide 22 looks thick while the plate-shaped light guides 26 and 28 are formed thin. can be realized. In other words, it is possible to realize a thick light guide 22 that emits light at a low cost.
  • a plurality of optical elements are provided on the main surface of one of the two plate-shaped light guides 26 and 28, and a main surface is provided according to the plurality of optical elements. The surface is luminous.
  • the main surface emits light in a pattern corresponding to the arrangement of the plurality of optical elements.
  • the lamp 10 using the light guide, which can present more novel light emission at low cost.
  • the main surfaces of both the first plate-shaped light guide section 26 and the second plate-shaped light guide section 28 are provided with a plurality of optical elements 26f and 28f.
  • the main surface of the first plate-shaped light guide portion 26 and the main surface of the second plate-shaped light guide portion 28 emit light in a pattern corresponding to the arrangement of the optical elements, so that the light emission has a more three-dimensional effect. realizable.
  • the density of the plurality of optical elements 26f provided on the main surface of the first plate-shaped light guide 26 and the density of the plurality of optical elements 26f provided on the main surface of the second plate-shaped light guide 28 The densities of the elements 28f are different.
  • a light emission pattern corresponding to the plurality of optical elements 26f on the main surface of the first plate-shaped light guide section 26 and a light emission pattern corresponding to the plurality of optical elements 28f on the main surface of the second plate-shaped light guide section 28. is different, it is possible to realize light emission with a more three-dimensional effect.
  • optical element 26f of the first plate-shaped light guide section 26 and the optical element 28f of the second plate-shaped light guide section 28 may have different shapes or different types of optical elements. This makes it possible to realize light emission with a more three-dimensional effect.
  • the position of the exit surface 26e of the first plate-shaped light guide portion 26 and the position of the exit surface 28e of the second plate-shaped light guide portion 28 are shifted from each other in the longitudinal direction of the lamp. This makes it possible to achieve light emission with a three-dimensional effect.
  • FIG. 7(a) to (d) are diagrams showing modified examples of the light guide 22.
  • the emission surface 28e of the second plate-shaped light guide portion 28 positioned below is positioned in front of the lamp with respect to the emission surface 26e of the first plate-shaped light guide portion 26 positioned above has been described.
  • the positional relationship of the output surfaces of the two plate-like light guide portions in the longitudinal direction of the lamp is not particularly limited.
  • the emission surface 26e of the first plate-shaped light guide 26 and the emission surface 28e of the second plate-shaped light guide 28 may be flush with each other. That is, they may be coplanar.
  • the emission surface 26e of the first plate-shaped light guide portion 26 may be located in front of the lamp with respect to the emission surface 28e of the second plate-shaped light guide portion 28. .
  • the light guide 22 may include three or more plate-shaped light guides.
  • the light guide 22 may include a plurality of plate-shaped light guides.
  • the light guide 22 includes three plate-shaped light guides. The output surfaces of the three plate-shaped light guides may be flush as in the modification shown in FIG. 7(c), or otherwise as in the modification shown in FIG. good.
  • FIGS. 8(a) and 8(b) are diagrams showing modifications of the light-emitting portion light guide 30.
  • FIG. 8(a) and 8(b) are diagrams showing modifications of the light-emitting portion light guide 30.
  • the shape of the cross section of the rod-shaped light guide part 34 is not particularly limited.
  • the rod-shaped light guide section 34 may have a rectangular cross section perpendicular to the longitudinal direction.
  • the cross section perpendicular to the longitudinal direction of the rod-shaped light guide portion 34 may have a shape in which two circles are connected.
  • the rod-shaped light guide portion 34 may have a shape in which two rod-shaped light guide portions 34_1 and 34_2 are connected in parallel.
  • the light source 32 may be provided for each of the two rod-shaped light guides 34_1 and 34_2.
  • the reflective element 34d_1 provided on the rod-shaped light guide portion 34_1 and the reflective element 34d_2 provided on the rod-shaped light guide portion 34_2 may be different.
  • the amount of light emitted from the rod-shaped light guide 34_1 and the amount of light emitted from the rod-shaped light guide 34_2 may be different.
  • the amount of light incident on the first plate-shaped light guide 26 and the amount of light incident on the second plate-shaped light guide 28 may be different.
  • the brightness of light emitted from the emission surface 26e of the first plate-shaped light guide 26 and the brightness of light emitted from the emission surface 28e of the second plate-shaped light guide 28 can be made different.
  • the configuration of the light emitting section 20 is not limited to that of the embodiment.
  • the light-emitting part light guide 30 may include a non-rod-shaped light guide instead of the rod-shaped light guide 34 .
  • the light-emitting section 20 may not have the light-emitting section light guide 30 and allow the light from the light source 32 to enter the light guide 22 directly.
  • the light emitting section 20 may include a reflector instead of the light emitting section light guide 30, and the light from the light source may enter the light guide 22 via the reflector.
  • the present invention can be used for lamps, especially lamps using light guides.
  • 10 lamp 20 light emitting section, 22 light guide, 26 first plate-shaped light guide, 26a, 26b main surfaces, 26d entrance surface, 26e exit surface, 26f optical element, 28 second plate-shaped light guide, 28a, 28b main surface, 28d entrance surface, 28e exit surface, 28f optical element.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
PCT/JP2022/038997 2021-10-25 2022-10-19 灯具 WO2023074506A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015162363A (ja) * 2014-02-27 2015-09-07 株式会社小糸製作所 車両用灯具
US20160252226A1 (en) * 2015-02-26 2016-09-01 T.Y.C. Brother Industrial Co., Ltd. Vehicle lamp
JP2017228490A (ja) * 2016-06-24 2017-12-28 スタンレー電気株式会社 車両用灯具
JP2018055907A (ja) * 2016-09-28 2018-04-05 株式会社日立情映テック 車両用前照灯装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015162363A (ja) * 2014-02-27 2015-09-07 株式会社小糸製作所 車両用灯具
US20160252226A1 (en) * 2015-02-26 2016-09-01 T.Y.C. Brother Industrial Co., Ltd. Vehicle lamp
JP2017228490A (ja) * 2016-06-24 2017-12-28 スタンレー電気株式会社 車両用灯具
JP2018055907A (ja) * 2016-09-28 2018-04-05 株式会社日立情映テック 車両用前照灯装置

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