CN117957400A - Lamp for vehicle - Google Patents

Lamp for vehicle Download PDF

Info

Publication number
CN117957400A
CN117957400A CN202280062870.4A CN202280062870A CN117957400A CN 117957400 A CN117957400 A CN 117957400A CN 202280062870 A CN202280062870 A CN 202280062870A CN 117957400 A CN117957400 A CN 117957400A
Authority
CN
China
Prior art keywords
light
guide member
light guide
vehicle lamp
reflector
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
CN202280062870.4A
Other languages
Chinese (zh)
Inventor
本村宪一
金塚昌平
秋山京平
林亮介
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 CN117957400A publication Critical patent/CN117957400A/en
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
    • 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
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights 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
    • 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
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • 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
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F21S43/145—Surface emitters, e.g. organic light emitting diodes [OLED]
    • 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
    • F21S43/237—Light guides characterised by the shape of the light guide rod-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
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex 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
    • 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
    • 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
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • 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
    • F21W2104/00—Exterior vehicle lighting devices for decorative purposes
    • 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
    • F21Y2115/30—Semiconductor lasers

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention provides a vehicle lamp, which can realize a light irradiation pattern with high design by using a light guide member and a reflector and hide an internal structure when not in lighting. The vehicle lamp includes: a light source unit which irradiates light; a light guide member (16) for receiving light from the light source unit from the end surface, transmitting the light inside, and radiating a part of the light from the side surface to the outside; and a reflector (15) that reflects light emitted from the light guide member (16) as reflected light, wherein the reflector (15) contains a light absorbing material.

Description

Lamp for vehicle
Technical Field
The present invention relates to a vehicle lamp, and more particularly, to a vehicle lamp that guides light from a light emitting element by a light guide member and irradiates the light.
Background
Conventionally, a light emitting element such as a Light Emitting Diode (LED) has been proposed as a light source for use as a vehicle lamp such as a headlight or a taillight. These vehicle lamps constitute a part of the vehicle exterior, and thus, have been designed to improve design in various external shapes and in a lit state. Therefore, there is also proposed a vehicle lamp in which light emitted from a light emitting element is incident on a light guide member, and light is scattered by a light scattering portion provided in the light guide member, thereby realizing a desired light emission shape. In the vehicle lamp using the light scattering by the light guide member as described above, the light is irradiated to the outside in the shape of the light scattering portion provided in the light guide member, and therefore, a linear and curved light emission shape is easily realized.
In recent years, there has been an increasing demand for design of vehicle lamps, and it is desired to express not only a linear light-emitting shape but also various light-emitting shapes. Even in the related art, a complicated light emitting shape can be realized by using a plurality of light emitting elements and light guiding members, but the degree of freedom of design is limited on the basis of an increase in the number of parts.
Accordingly, patent document 1, patent document 2, and the like have also proposed a vehicle lamp having a light emission shape that irradiates light from a light guide member in a plurality of directions to realize a more complicated appearance. By using the light guide member that irradiates light in a plurality of directions as described above, the light distribution irradiated in each direction can be adjusted, and expression by a plurality of light emission shapes can be realized by one light guide member. As an example, light in one direction irradiated from the light guide member is directly led out to the outside, and light in the other direction is reflected by the reflector, whereby direct light irradiation and indirect light irradiation with two-dimensional expansion can be simultaneously realized in a linear shape.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2020-027731
Patent document 2: japanese patent laid-open No. 2020-129460
Disclosure of Invention
Problems to be solved by the invention
However, since the light guide member of the vehicle lamp in which the light guide member and the reflector are combined as described above is made of a transparent member, the reflector has a highly reflective surface, and therefore the internal structure of the vehicle lamp can be visually recognized when the vehicle lamp is not lighted. Since the light guide member and the reflector are optically designed to radiate desired light at the time of lighting, it is difficult to achieve both of the design properties in the case where the structure is directly visually recognized. This is particularly remarkable when the optical element is contained in a large amount in order to realize a complicated light emission shape.
Accordingly, the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a vehicle lamp as follows: a highly designed light irradiation pattern can be realized using a light guide member and a reflector, and the internal structure is hidden when not lit.
Means for solving the problems
In order to solve the above problems, a vehicle lamp according to the present invention includes: a light source unit which irradiates light; a light guide member into which light from the light source unit is incident from an end surface, which guides the light inside, and irradiates a part of the light from a side surface to the outside; and a reflector that reflects light irradiated from the light guide member as reflected light, the reflector containing a light absorbing material.
In the vehicle lamp according to the present invention as described above, the reflector containing the light absorbing material is used to reflect the light emitted from the side surface of the light guide member, so that it is difficult to visually recognize the internal structure of the vehicle lamp from the outside. Thus, a highly designed light irradiation pattern can be realized using the light guide member and the reflector, and the internal structure can be hidden when not lit.
In one aspect of the present invention, a light scattering portion is formed on a surface of the reflector.
In one aspect of the present invention, the vehicle lamp includes a light shielding material, the light shielding material being disposed between the light guide member and the reflector along a longitudinal direction of the light guide member, and a light transmitting portion that transmits the light is partially formed.
In one aspect of the present invention, the light guide member irradiates the light as a first light and a second light in at least two directions of a first direction and a second direction, and the reflector reflects the second light.
In one aspect of the present invention, the light guide member irradiates the light in a third direction as a third light, and the vehicle lamp includes a first light guide plate into which the third light is incident from one end face, emits the third light from the other end face, and transmits the reflected light from the back face side to the front face side.
In one embodiment of the present invention, the vehicle lamp includes a second light guide plate into which the first light is incident from one end face and from which the first light is emitted from the other end face.
In one aspect of the present invention, the vehicle lamp includes an inner lens that transmits the first light.
Effects of the invention
In the present invention, the following vehicle lamp can be provided: a highly designed light irradiation pattern can be realized using a light guide member and a reflector, and the internal structure is hidden when not lit.
Drawings
Fig. 1 is a schematic cross-sectional view showing the structure of a vehicle lamp 10 according to the first embodiment, where (a) in fig. 1 is a cross-sectional view of a portion where a light-transmitting portion 18a is formed, and (b) in fig. 1 is a cross-sectional view of a portion where the light-transmitting portion 18a is not formed.
Fig. 2 is a schematic perspective view for explaining an internal structure of the vehicle lamp 10 according to the first embodiment.
Fig. 3 is a photograph showing the appearance of the vehicle lamp 10 according to the first embodiment, where (a) in fig. 3 is shown from the front side when not lit, (b) in fig. 3 is shown from the front side when lit, (c) in fig. 3 is shown obliquely from 30 degrees when not lit, and (d) in fig. 3 is shown obliquely from 30 degrees when lit.
Fig. 4 is a schematic cross-sectional view showing the structure of the vehicle lamp 10 according to the second embodiment, where (a) in fig. 4 is a cross-sectional view of a portion where the light-transmitting portion 18a is formed, and (b) in fig. 4 is a cross-sectional view of a portion where the light-transmitting portion 18a is not formed.
Fig. 5 is a photograph showing the appearance of the vehicle lamp 10 according to the second embodiment, where (a) in fig. 5 is shown from the front side when not lit, (b) in fig. 5 is shown from the front side when lit, (c) in fig. 5 is shown obliquely from 30 degrees when not lit, and (d) in fig. 5 is shown obliquely from 30 degrees when lit.
Detailed Description
(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repetitive description thereof will be omitted as appropriate. Fig. 1 is a schematic cross-sectional view showing the structure of the vehicle lamp 10 according to the present embodiment, where (a) in fig. 1 is a cross-sectional view of a portion where the light-transmitting portion 18a is formed, and (b) in fig. 1 is a cross-sectional view of a portion where the light-transmitting portion 18a is not formed. Fig. 2 is a schematic perspective view for explaining an internal structure of the vehicle lamp 10 according to the present embodiment. The A-A position in fig. 2 corresponds to the section of (a) in fig. 1, and the B-B position in fig. 2 corresponds to the section of (B) in fig. 1.
As shown in fig. 1 and 2, the vehicle lamp 10 includes a housing 11, a back plate 12, an outer lens 13, a spacer 14, a reflector 15, a light guide member 16, a light shielding material 17, a light shielding material 18, an inner lens 19, and a light emitting element 20. The reflector 15 includes a first reflecting portion 15a, a second reflecting portion 15b, and a shade holding portion 15c. A light transmitting portion 18a that transmits light is partially formed in the light shielding material 18. In fig. 1, arrows drawn from the inside toward the outside of the light guide member 16 schematically show paths of light that is conducted and scattered inside the light guide member 16.
The housing 11 is a frame portion for holding each member of the vehicle lamp 10, and is made of a light-shielding material that blocks light. The case 11 is provided with a front opening and a rear opening, and an outer lens 13 and a back plate 12 covering the front opening and the rear opening. The back plate 12 is made of a light-shielding material that blocks light, and is provided so as to cover the rear opening of the case 11. The rear panel 12 is provided with a connector portion, a harness, an internal wiring, and the like, which transmit electric power supplied from the outside of the vehicle lamp 10 to the inside, and is not shown here. Here, the case 11 and the back plate 12 are shown as being separately configured, but the case 11 may be used as being integrated with both.
The outer lens 13 is a member made of a material that transmits at least a part of light, is provided so as to cover the front opening of the housing 11 and fix the peripheral edge, and is an optical member that guides the light from the light guide member 16 to the outside of the vehicle lamp 10. Examples of the material constituting the outer lens 13 include glass, acrylic resin, epoxy resin, and polycarbonate is most preferable from the viewpoints of light weight, impact resistance, weather resistance, and light transmittance. The spacer 14 is inserted between the reflector 15 and the outer lens 13 in the housing 11, and maintains the space therebetween. An example of using the spacer 14 is shown here, but the spacer 14 may be omitted. The lamp room of the vehicle lamp 10 is constituted by a housing 11, a back plate 12, and an outer lens 13.
The reflector 15 is an optical member disposed inside the housing 11 behind the light guide member 16, and reflects at least a part of the light emitted from the light guide member 16 by a reflecting surface. The light reflected by the reflector 15 is irradiated to the outside of the vehicle lamp 10 through the outer lens 13. The material constituting the reflector 15 is not limited, and conventionally known resin materials, glass, or the like can be used. In addition, the reflector 15 is designed to contain a light absorbing material at least in the reflection surface and absorb at least a part of visible light. The light absorbing material is not limited to this, but a dye or paint that absorbs light of a specific wavelength can be used.
Examples of the structure of the reflector 15 include a structure in which a dye is contained in the entire resin material constituting the reflector 15, and a structure in which a reflective film is partially formed on a reflective surface by a dye or a paint by vapor deposition or the like. The light-absorbing material may be one that absorbs a specific color such as red or blue, but is preferably one that absorbs a dark color in a wide wavelength range, and more preferably black. Even in the case of using a black light absorbing material, by making the surface of the reflector 15 a glossy surface and processing it to a piano black tone, a part of the light from the light guide member 16 can be reflected.
The reflector 15 contains a light absorbing material, and thus, even when the interior of the vehicle lamp 10 is observed from the outside through the outer lens 13, it is difficult to visually recognize the shapes of the light guide member 16 and the light shielding member 18. Therefore, a highly designed light irradiation pattern can be realized using the light guide member 16 and the reflector 15, and the internal structure can be hidden when not lit. In particular, using a dark color system as the light absorbing material, the reflector 15 is completely black when the vehicle lamp 10 is not lighted, and an appearance design that suppresses the expression of the presence feeling of the vehicle lamp 10 can be realized.
The first reflecting portion 15a is a region of the reflector 15 provided on the back surface side of the light guide member 16, and reflects light irradiated from the light guide member 16 to the back surface side to the front. The first reflecting portion 15a can be designed based on the direction of the reflected light, and is not limited to a specific shape. In the example shown in fig. 1, the first reflecting portion 15a is provided so as to cover the rear half of the side surface of the light guide member 16 so as not to leak stray light from the gap. Here, although the light absorbing material is contained in at least the second reflecting portion 15b of the reflector 15, the light absorbing material may not be contained in the first reflecting portion 15a, and a highly reflective film that satisfactorily reflects visible light may be formed on the reflecting surface of the first reflecting portion 15 a.
The second reflecting portion 15b is located at a position apart from the light guide member 16 in the reflector 15, and is a region that reflects light irradiated from the light guide member 16 to the front. In the example shown in fig. 1 and 2, the second reflecting portion 15b is formed in a parabolic cross section, and the light guide member 16 is disposed at the focal position of the parabolic cross section. Therefore, the light emitted from the light guide member 16 to the lower side is emitted from the outer lens 13 to the outside as the light reflected by the reflection surface of the second reflection portion 15b and substantially parallel to each other. In fig. 1 and 2, the second reflecting portion 15b is provided below the light guide member 16, but the position and shape are not limited if it is provided at a position where light other than the light irradiated to the front surface side or the back surface side of the light irradiated from the light guide member 16 is reflected.
Although not shown in fig. 1 and 2, a light scattering portion is preferably formed on the surface of the reflecting surface of the second reflecting portion 15 b. The shape and structure of the light scattering portion are not limited, and examples of the structure include a structure in which a protrusion is formed in the horizontal direction, which is the extending direction of the light guide member 16, a structure in which a protrusion is formed in the vertical direction orthogonal to the light guide member 16, and a structure in which a protrusion is formed two-dimensionally. When the light scattering portion is formed in the horizontal direction, scattering of light in the up-down direction is enhanced, and the reflected light from the reflector 15 can be visually recognized regardless of the viewpoint position in the height direction. In addition, when the light scattering portion is formed in the up-down direction, scattering of light in the left-right direction is enhanced, and the reflected light from the reflector 15 can be visually recognized regardless of the viewpoint position in the left-right direction.
The shade holding portion 15c is formed with a recess at a position corresponding to the shade 18 so as to be insertable into a tip portion of the shade 18. The front end of the shade 18 is inserted into the shade holding portion 15c, whereby the shade 18 is positioned to be held, and a gap generated between the front end of the shade 18 and the reflector 15 can be eliminated. This can prevent leakage of light from the gap generated by the error or the use history, and suppress deterioration of the shape and contrast of the light reflected by the second reflection portion 15 b. Although the reflector 15 is provided with the concave light-shielding material holding portion 15c, the shape of the light-shielding material holding portion 15c is not limited to the concave portion, and a height difference shape or the like contacting one surface side of the light-shielding material 18 may be used. In addition, if there is no problem in the leakage of light from the gap or the holding of the light shielding material 18, the light shielding material holding portion 15c can be omitted.
The light guide member 16 is made of a material that transmits light, transmits light in the extending direction, and is an optical member that irradiates the transmitted light from the side. The light guide member 16 has a concave-convex step formed along a side surface, and light transmitted inside is reflected by the concave-convex step and irradiated from the side surface to the outside of the light guide member 16. In the examples shown in fig. 1 and 2, a light guide having a substantially cylindrical shape is shown as the light guide member 16, and may have a plate shape, but the specific shape is not limited thereto. In the present embodiment, two concave-convex steps of a pattern are formed on the side surface of the light guide member 16, and light (first light) reflected by one concave-convex step is irradiated to the inner lens 19 side, and light (second light) reflected by the other concave-convex step is irradiated to the second reflecting portion 15b side at the lower side in the figure.
In the example shown in fig. 1 (a), a concave step in which the side surface of the light guide member 16 is concave is used as a step for reflecting the first light to the inner lens 19 side. This is because the first light that irradiates the front surface is used as the main light distribution of the vehicle lamp 100, and therefore the light that is guided by the light guide member 16 is easily irradiated, and the first light is efficiently reflected toward the front surface. In addition, a boss step in which the side surface of the light guide member 16 is formed in a convex shape is used as a step for reflecting the second light toward the second reflection portion 15b side. This is because the second light irradiated to the lower side is used as a light distribution for decoration, and therefore, a boss step where light obtained by guiding light in the light guide member 16 is difficult to irradiate is used, thereby minimizing the influence on the main light distribution, i.e., the first light. The shape of the convex steps for reflecting the second light is preferably adjusted so as not to use the amount of light, including reducing the height of the steps, expanding the distance between the steps in a range where unevenness of the light does not occur, and reducing the number of steps. In fig. 1 (a) and 1 (b), an example in which the convex steps reflecting the second light are formed discretely at positions corresponding to the light transmitting portions 18a is shown, but one convex step may be formed over the entire area of the light guide member 16.
The light shielding members 17 and 18 are disposed above and below the light guide member 16, respectively, and are members made of a material that blocks light. The material constituting the light shielding member 17 and the light shielding member 18 is not limited, and the color tone is not limited, but the color tone is preferably the same as that of the reflector 15, and both are preferably black for preventing stray light. As shown in fig. 1 (b), when the tip of the light shielding material 18 is to be inserted into the light shielding material holding portion 15c, the tip of the light shielding material 18 is preferably tapered toward the tip. By forming the tip in a conical shape, the light-shielding material holding portion 15c, which is a concave portion, can be easily inserted into the light-shielding material 18, and workability of the assembly process can be improved.
The light shielding member 17 is provided over the entire area in the extending direction of the light guide member 16 when it is positioned above the first reflecting portion 15a of the reflector 15, and the front portion covers the upper surface of the inner lens 19. The light shielding material 18 is disposed at the boundary between the first reflecting portion 15a and the second reflecting portion 15b of the reflector 15, and is disposed over the entire area along the extending direction of the light guide member 16, and the front portion covers the lower surface of the inner lens 19. A part of the light emitted from the light guide member 16 reaches the light shielding material 17 and the light shielding material 18 and is blocked, and therefore the direction of the light emitted from the vehicle lamp 10 is restricted.
Fig. 1 and 2 show examples in which the light shielding material 17, the light shielding material 18, and the inner lens 19 are integrally formed by a two-color molding technique using a resin. By using the two-color molding technique, the molding accuracy of the light shielding member 17 and the light shielding member 18 is improved, and the relative alignment with the inner lens 19 is not required, so that the manufacturing process can be simplified. Further, by integrating the shade 17, the shade 18, and the inner lens 19, the inner lens 19 can be relatively aligned with respect to the reflector 15 only by inserting the tip of the shade 18 into the shade holding portion 15c of the reflector 15, and further, the manufacturing process can be simplified. Here, although the light shielding material 17, the light shielding material 18, and the inner lens 19 are integrally formed by the two-color molding technique, the light shielding material 17, the light shielding material 18, and the inner lens 19 may be separately formed and fixed by an adhesive or the like.
The light transmitting portion 18a is a portion that transmits light formed in a part of the light shielding member 18. In the example shown in fig. 1 and 2, an opening formed by cutting a part of the light shielding material 18 is used as the light transmitting portion 18a, and the light transmitting portion 18a may be formed using a transparent resin or the like. In the example shown in fig. 2, the light transmitting portion 18a is formed with a plurality of mesa-shaped openings along the longitudinal direction of the light guide member 16. However, the shape and number of the light transmitting portions 18a are not limited, and are designed according to the desired light emission shape by the second reflecting portion 15b of the reflector 15. As an example, the light-transmitting portion 18a may be formed at a position close to the inner lens 19 distant from the reflector 15 by separating the front end of the light-shielding member 18 from the reflector 15 over the entire width, so that the light-transmitting portion 18a may be formed over the entire width direction, and the reflector 15 may be in contact with the front end of the light-shielding member 18.
A part of the light emitted from the light guide member 16 passes through the light transmitting portion 18a and reaches the second reflecting portion 15b of the reflector 15, and the light reflected by the second reflecting portion 15b is emitted to the outside through the outer lens 13. By providing the light transmitting portion 18a in a part of the light shielding member 18, the shape of the light reaching the second reflecting portion 15b can be set to a shape corresponding to the light transmitting portion 18a, and the light emission shape visually recognized from the outer lens 13 side can be adjusted by a simple structure, so that the designability of the light emission shape that can be expressed by the vehicle lamp 10 can be improved.
In the vehicle lamp 10 of the present embodiment, since the light absorbing material is contained in the reflector 15, the light reflected by the second reflecting portion 15b has lower brightness than the light directly irradiated through the inner lens 19. Thus, light emission having a shade such as direct irradiation light and indirect irradiation light can be simultaneously expressed by one vehicle lamp 10, and the designability of the light emission shape can be improved. In addition, as described above, when the light scattering portion is formed on the surface of the second reflecting portion 15b, the outline of the light reflected by the second reflecting portion 15b is blurred, and light having a soft impression can be further irradiated. In addition, by forming the light scattering portion, the angle of view of the light reflected by the second reflecting portion 15b is enlarged, and visibility and design from the oblique side of the vehicle can be improved.
The inner lens 19 is a member made of a material that can transmit at least a part of light, and is disposed between the light guide member 16 and the outer lens 13 in front of the light guide member 16. The shape of the inner lens 19 is not limited, and a lens shape having a curved surface may be used to adjust the light distribution. In the example shown in fig. 1 and 2, a light shielding material 17 and a light shielding material 18 are integrally formed behind an inner lens 19, and are fixed in a lamp room via the light shielding material 17 and the light shielding material 18.
The light emitting element 20 is an optical element disposed opposite to the end surface of the light guide member 16, and is electrically connected to a power source and a driving circuit, not shown, and emits light by supplying electric power thereto. The configuration of the light emitting element 20 is not limited, and conventionally known elements such as a light emitting diode element, an organic EL element, and a semiconductor laser element can be used.
As described above, in the vehicle lamp 10 according to the present embodiment, the light emitting element 20 emits the emitted light to the end surface of the light guide member 16, and the light is transmitted through the light guide member 16. A part of the light (first light) transmitted through the light guide member 16 is reflected by the concave-convex steps, and is directly irradiated to the outside of the vehicle lamp 10 via the inner lens 19 and the outer lens 13. A part of the light (second light) that has been transmitted through the light guide member 16 is reflected by the concave-convex steps, reaches the second reflection portion 15b via the light transmission portion 18a, is reflected, and is indirectly irradiated to the outside of the vehicle lamp 10 via the outer lens 13. The light that has reached the light shielding material 17 and the light shielding material 18 among the light emitted from the light guide member 16 is blocked, and the light emitted from the second reflecting portion 15b to the outside has a light emission shape corresponding to the shape of the light transmitting portion 18 a.
Fig. 3 is a photograph showing the appearance of the vehicle lamp 10 according to the present embodiment, where (a) in fig. 3 is shown from the front side when not lit, (b) in fig. 3 is shown from the front side when lit, (c) in fig. 3 is shown obliquely from 30 degrees when not lit, and (d) in fig. 3 is shown obliquely from 30 degrees when lit. In the non-lit state, ambient illumination is lit to reproduce the daytime vehicular surroundings, and in the lit state, ambient illumination is extinguished to reproduce the nighttime vehicular surroundings. In the example shown in fig. 3, the case 11, the reflector 15, the light shielding material 17, and the light shielding material 18 are formed of black resin, and minute protrusions are formed two-dimensionally in the second reflecting portion 15b to apply embossing.
As shown in fig. 3 (a) and 3 (c), the inner structure of the vehicle lamp 10 is not visually recognized in the non-lit state, and the front surface portion of the inner lens 19 is visually recognized. The second reflecting portion 15b of the reflector 15 and the light shielding member 18 are all black, and are not perceived by a person. The light transmitting portion 18a of the light shielding member 18 and the light guiding member 16 are not visually recognized through the second reflecting portion 15 b. This is the same from the front or from the obliquely front.
As shown in fig. 3 (b) and 3 (d), in the lit state, the direct light irradiation from the light guide member 16 via the inner lens 19 and the indirect light irradiation via the second reflecting portion 15b can be visually recognized. The light irradiation through the second reflecting portion 15b is lower in contrast than the light irradiation through the inner lens 19, and is light irradiation with a blurred soft impression (a pasty state). The light emission shape of the second reflecting portion 15b is a light emission shape reflecting the shape of the light transmitting portion 18a formed in the light shielding member 18. The light emission shape of the second reflecting portion 15b can be visually recognized similarly from the front or obliquely from the front. Therefore, it is known that the light guide member 16 and the reflector 15 can be used to realize a highly designed light irradiation pattern and conceal the internal structure when not lit.
As described above, in the vehicle lamp 10 of the present embodiment, the reflector 15 containing the light absorbing material is used to reflect the light emitted from the side surface of the light guide member 16, so that it is difficult to visually recognize the internal structure of the vehicle lamp 10 from the outside. Thus, a highly designed light irradiation pattern can be realized using the light guide member 16 and the reflector 15, and the internal structure can be hidden when not lit.
(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to fig. 4 and 5. The description of the overlapping contents with the first embodiment will be omitted. Fig. 4 is a schematic cross-sectional view showing the structure of the vehicle lamp 10 according to the present embodiment, where (a) in fig. 4 is a cross-sectional view of a portion where the light-transmitting portion 18a is formed, and (b) in fig. 4 is a cross-sectional view of a portion where the light-transmitting portion 18a is not formed. In the present embodiment, three concave-convex steps are formed in the light guide member 16, and points where the first light, the second light, and the third light are irradiated from the side face in three directions are different from those of the first embodiment. In fig. 4, the case 11, the back plate 12, the outer lens 13, the spacers 14, and the light emitting element 20 are not shown.
As shown in fig. 4, the vehicle lamp 10 includes a reflector 25, a light guide member 16, a light shielding member 18, and a light guide plate portion 30. In fig. 4, arrows drawn from the inside toward the outside of the light guide member 16 schematically show paths of light that is conducted and scattered inside the light guide member 16. In addition, the second light guide plate 31 of the light guide plate portion 30 is formed integrally with the first light guide plate 32. Here, an example in which the second light guide plate 31 is integrally formed with the first light guide plate 32 is shown as the light guide plate portion 30, or may be formed separately as a separate body.
The reflector 25 is an optical member disposed inside the housing 11 behind the light guide member 16, and reflects at least a part of the light emitted from the light guide member 16 by a reflecting surface. The material constituting the reflector 25 is not limited, but is designed to contain a light absorbing material at least in the reflection surface and absorb at least a part of visible light. The reflector 25 includes a first reflecting portion 25a and a second reflecting portion 25b, and the light shielding member 18 is integrally formed so as to protrude from a boundary position between the first reflecting portion 25a and the second reflecting portion 25 b.
The light shielding member 18 is a protruding portion formed integrally with the reflector 25, and is made of a light shielding material that blocks light. A light transmitting portion 18a that transmits light is partially formed in the light shielding material 18. As shown in fig. 4 (a) and 4 (b), in the region where the light transmitting portion 18a is formed, the light (second light) emitted from the light guide member 16 reaches the second reflecting portion 25b and is reflected as indicated by the broken line arrow. In the region where the light transmitting portion 18a is not formed, the light irradiated from the light guide member 16 is blocked by the light shielding member 18 from reaching the second reflecting portion 25b.
The light guide plate portion 30 is constituted by the second light guide plate 31 and the first light guide plate 32, and is an optical member for transmitting light from one end to the inside by injecting light, and for irradiating light from the other end to the outside. In the example shown in fig. 4, the second light guide plate 31 and the first light guide plate 32 are connected to each other at the end portion facing the light guide member 16, and the two plates are formed in a substantially V-shape. The second light guide plate 31 and the first light guide plate 32 are plate-shaped members made of a material that transmits light, respectively, and light emitted from the light guide member 16 is incident from one end face and is irradiated forward from the other end face 31a and the end face 32a.
The second light guide plate 31 is disposed substantially horizontally in front of the light guide member 16, and as indicated by solid arrows, a part of the light (first light) emitted from the light guide member 16 is incident from the rear end surface, and the light is directly irradiated to the outside from the front end surface 31a via the outer lens 13. Here, although the example in which the second light guide plate 31 is horizontally arranged is shown, the shape and arrangement are not limited if the light is directly led out from the end face 31a from which the light is emitted.
The first light guide plate 32 is disposed obliquely in front of the light guide member 16, and the flat plate portion 32b of the first light guide plate 32 traverses in front of the second reflecting portion 25b of the reflector 25. As shown by solid arrows, a part of the light (third light) irradiated from the light guide member 16 is incident from the rear end surface, and the light is directly irradiated to the outside from the front end surface 32a through the outer lens 13 by the first light guide plate 32. Since the first light guide plate 32 is made of a translucent material, the light (second light) reflected by the second reflecting portion 25b is transmitted from the back surface side to the front surface side in the flat plate portion 32b and is emitted from the outer lens 13 to the outside.
Fig. 5 is a photograph showing the appearance of the vehicle lamp 10 according to the present embodiment, where (a) in fig. 5 is shown from the front side when not lit, (b) in fig. 5 is shown from the front side when lit, (c) in fig. 5 is shown obliquely from 30 degrees when not lit, and (d) in fig. 5 is shown obliquely from 30 degrees when lit. In the non-lit state, ambient illumination is lit to reproduce the daytime vehicular surroundings, and in the lit state, ambient illumination is extinguished to reproduce the nighttime vehicular surroundings. In the example shown in fig. 5, the case 11, the reflector 25, and the light shielding member 18 are formed of black resin, and minute protrusions are formed two-dimensionally in the second reflecting portion 25b to apply embossing.
As shown in fig. 5 (a) and 5 (c), in the non-lit state, the internal structure of the vehicle lamp 10 is not visually recognized, and the front ends of the second light guide plate 31 and the first light guide plate 32, that is, the end surfaces 31a and 32a, are visually recognized. The second reflecting portion 25b of the reflector 25 and the light shielding member 18 are entirely black, and are not perceived by a person. The light transmitting portion 18a of the light shielding member 18 and the light guiding member 16 are not visually recognized through the second reflecting portion 25 b. The same is true from the front or from the oblique front.
As shown in fig. 5 (b) and 5 (d), in the lit state, the direct light irradiation from the end surfaces 31a and 32a of the second light guide plate 31 and the first light guide plate 32 and the indirect light irradiation via the second reflecting portion 15b can be visually recognized. The light irradiation via the second reflecting portion 15b and the flat plate portion 32b is lower in contrast than the light irradiation from the end surfaces 31a and 32a, and the light irradiation is a blurred soft impression (pasty light irradiation). The light emission shape of the second reflecting portion 25b is a light emission shape reflecting the shape of the light transmitting portion 18a formed in the light shielding member 18. The light emission shape of the second reflecting portion 25b is also visually recognized from the front or obliquely forward. Therefore, it is known that the light guide member 16 and the reflector 25 can be used to realize a highly designed light irradiation pattern and conceal the internal structure when not lit.
As described above, in the vehicle lamp 10 of the present embodiment, the reflector 25 containing the light absorbing material is used to reflect the light emitted from the side surface of the light guide member 16, so that it is difficult to visually recognize the internal structure of the vehicle lamp 10 from the outside. Thus, a highly designed light irradiation pattern can be realized using the light guide member 16 and the reflector 25, and the internal structure can be hidden when not lit.
The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in the different embodiments are also included in the technical scope of the present invention.
The international application claims priority of the japanese patent application of the application at 9/29 of 2021 based on patent application No. 2021-159987, the entire contents of which are incorporated by reference.
The above description of specific embodiments of the present invention is presented for the purpose of illustration. These are not intended to be limiting, nor are they intended to be limiting. Many modifications and variations will be apparent to those skilled in the art in light of the foregoing disclosure.
Description of the reference numerals
10: A lamp for a vehicle;
11: a housing;
12: a back plate;
13: an outer lens;
14: a spacer;
15. 25: a reflector;
15a, 25a: a first reflection section;
15b, 25b: a second reflection part;
15c: a light shielding member holding portion;
16: a light guide member;
17. 18: a light shielding member;
18a: a light transmitting portion;
19: an inner lens;
20: a light emitting element;
30: a light guide plate portion;
31: a second light guide plate;
31a: an end face;
32: a first light guide plate;
32a: an end face;
32b: a plate portion.

Claims (7)

1. A lamp for a vehicle, characterized in that,
The vehicle lamp includes:
a light source unit which irradiates light;
A light guide member into which light from the light source unit is incident from an end surface, which guides the light inside, and irradiates a part of the light from a side surface to the outside; and
A reflector that reflects light irradiated from the light guide member as reflected light,
The reflector comprises a light absorbing material.
2. A vehicle lamp according to claim 1, wherein,
A light scattering portion is formed on the surface of the reflector.
3. A vehicle lamp according to claim 1 or 2, wherein,
The vehicle lamp comprises a light shielding member made of a light shielding material,
The light shielding member is disposed between the light guide member and the reflector along a longitudinal direction of the light guide member, and the light shielding member is partially formed with a light transmitting portion through which the light is transmitted.
4. A vehicle lamp according to claim 1 or 2, wherein,
The light guide member irradiates the light as first light and second light to at least two directions of a first direction and a second direction,
The reflector reflects the second light.
5. A vehicle lamp according to claim 4, wherein,
The light guide member also irradiates the light as third light to a third direction,
The vehicle lamp includes a first light guide plate into which the third light is incident from one end face, from which the third light is emitted from the other end face, and through which the reflected light is transmitted from the back face side to the front face side.
6. A vehicle lamp according to claim 4, wherein,
The vehicle lamp includes a second light guide plate into which the first light is incident from one end face and from which the first light is emitted from the other end face.
7. A vehicle lamp according to claim 4, wherein,
The vehicle lamp includes an inner lens that transmits the first light.
CN202280062870.4A 2021-09-29 2022-09-20 Lamp for vehicle Pending CN117957400A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2021159987A JP2023049940A (en) 2021-09-29 2021-09-29 Vehicular lighting fixture
JP2021-159987 2021-09-29
PCT/JP2022/034950 WO2023054053A1 (en) 2021-09-29 2022-09-20 Vehicular lamp

Publications (1)

Publication Number Publication Date
CN117957400A true CN117957400A (en) 2024-04-30

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ID=85782529

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202280062870.4A Pending CN117957400A (en) 2021-09-29 2022-09-20 Lamp for vehicle

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JP (1) JP2023049940A (en)
CN (1) CN117957400A (en)
WO (1) WO2023054053A1 (en)

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Publication number Priority date Publication date Assignee Title
KR102680428B1 (en) * 2024-01-02 2024-07-02 주식회사 에이엠에스 Lamp Apparatus For Vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ306862B6 (en) * 2011-06-23 2017-08-16 Varroc Lighting Systems, s.r.o. A headlight signal lamp with a hidden light source
JPWO2016006699A1 (en) * 2014-07-10 2017-04-27 株式会社小糸製作所 Lamp
JP6504886B2 (en) * 2015-04-03 2019-04-24 株式会社小糸製作所 Vehicle lamp
JP6785673B2 (en) * 2017-01-24 2020-11-18 スタンレー電気株式会社 Vehicle lighting
JP7307538B2 (en) * 2018-11-21 2023-07-12 スタンレー電気株式会社 vehicle lamp

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