WO2021246065A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2021246065A1
WO2021246065A1 PCT/JP2021/015824 JP2021015824W WO2021246065A1 WO 2021246065 A1 WO2021246065 A1 WO 2021246065A1 JP 2021015824 W JP2021015824 W JP 2021015824W WO 2021246065 A1 WO2021246065 A1 WO 2021246065A1
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WO
WIPO (PCT)
Prior art keywords
inner lens
light source
light
optical axis
lighting device
Prior art date
Application number
PCT/JP2021/015824
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English (en)
Japanese (ja)
Inventor
愛 王
剛 安達
良平 高山
Original Assignee
ミネベアミツミ株式会社
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Filing date
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Application filed by ミネベアミツミ株式会社 filed Critical ミネベアミツミ株式会社
Publication of WO2021246065A1 publication Critical patent/WO2021246065A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions

Definitions

  • the present invention relates to a lighting device.
  • the reflector type lighting device is a light source such as an LED (Light Emitting Diode), a reflector that reflects the light of the light source, and a mechanical shade that switches the vertical lower and upper optical paths in the usage state of the light from the reflector. It is equipped with a unit and a lens that collects light that has passed through the shade unit.
  • LED Light Emitting Diode
  • Japanese Unexamined Patent Publication No. 2018-186068 Japanese Unexamined Patent Publication No. 2015-14405 Japanese Unexamined Patent Publication No. 2017-10789 International Publication No. 2015/022848 Japanese Unexamined Patent Publication No. 2018-55907
  • the present invention has been made in view of the above, and is suitable for forming a part of a lighting device suitable for miniaturization without the need for a reflector or a shade portion, and a lighting device suitable for each of a high beam and a low beam.
  • the purpose is to provide.
  • the lighting device includes a light source, an inner lens for a high beam, and an outer lens.
  • the light source has an optical axis in the horizontal direction in the used state.
  • the inner lens for the high beam is arranged in front of the optical axis of the light source.
  • the outer lens is arranged in front of the inner lens on the optical axis.
  • the inner lens has a convex portion at the tip facing the outer lens.
  • the convex portion has a shape in which the center is located on the focal curve of the outer lens and gradually moves away from the focal curve as the distance from the center with respect to the optical axis increases.
  • the lighting device according to one aspect of the present invention is suitable for forming a part of a lighting device that does not require a reflector or a shade portion and is suitable for miniaturization, and can provide a lighting device suitable for each of a high beam and a low beam. can.
  • FIG. 1A is a side view of a main part of a lighting device according to an embodiment.
  • FIG. 1B is a plan view of a main part of the lighting device.
  • FIG. 2A is a side view of the inner lens for the high beam.
  • FIG. 2B is a plan view of the inner lens for the high beam.
  • FIG. 2C is a front view of the inner lens for the high beam.
  • FIG. 2D is a rear view of the inner lens for the high beam.
  • FIG. 2E is a bottom view of the inner lens for the high beam.
  • FIG. 3 is a diagram showing an example of arrangement of the inner lens for the high beam with respect to the focal curved surface of the outer lens.
  • FIG. 4A is a plan view showing an example of the shape pattern of the emission surface of the inner lens for the high beam.
  • FIG. 4B is a side view showing an example of the shape pattern of the emission surface of the inner lens for the high beam.
  • FIG. 5A is a diagram showing an example of a high beam projected light according to a comparative example.
  • FIG. 5B is a diagram showing an example of the projected light of the high beam according to the embodiment.
  • FIG. 6A is a plan view showing another example of the emission surface of the inner lens for the high beam.
  • FIG. 6B is a side view showing another example of the emission surface of the inner lens for the high beam.
  • FIG. 7 is a diagram showing an example of the operation of the overhead function.
  • FIG. 8 is a diagram showing an example of a notch provided in the plate.
  • FIG. 9 is a diagram showing an example of a low beam projected light to which an overhead function is added.
  • FIG. 10 is a diagram showing an example of another method for realizing the overhead function.
  • FIG. 11 is a perspective view of the outer lens.
  • FIG. 12 is a diagram showing an example of refraction of light in the horizontal plane of the outer lens.
  • FIG. 13 is a diagram showing an example of refraction of light in the vertical plane of the outer lens.
  • FIG. 14A is a diagram showing an example of the projected light of the high beam when the tapered cut surface is not provided.
  • FIG. 14B is a diagram showing an example of the projected light of the high beam according to the embodiment.
  • FIG. 14A is a diagram showing an example of the projected light of the high beam when the tapered cut surface is not provided.
  • FIG. 14B is a diagram showing an example of the projected light of the high beam according to the embodiment.
  • FIG. 15A is a diagram showing an example of the projected light of the low beam when the tapered cut surface is not provided.
  • FIG. 15B is a diagram showing an example of a low beam projected light according to an embodiment.
  • FIG. 16A is a side view of an inner lens for a low beam.
  • FIG. 16B is a plan view of the inner lens for the low beam.
  • FIG. 16C is a front view of the inner lens for the low beam.
  • FIG. 16D is a rear view of the inner lens for the low beam.
  • FIG. 16E is a bottom view of the inner lens for the low beam.
  • FIG. 17A is a diagram showing an example of the action of the slipback structure.
  • FIG. 17B is a diagram showing an example of the action of the slipback structure when the L value is shorter.
  • FIG. 18A is a diagram showing an example of a low beam projected light according to a comparative example without slipback.
  • FIG. 18B is a diagram showing an example of a low beam
  • the lighting device according to the embodiment will be described with reference to the drawings.
  • the present invention is not limited to this embodiment.
  • the relationship between the dimensions of each element in the drawing, the ratio of each element, etc. may differ from the reality. Even between the drawings, there may be parts where the relationship and ratio of the dimensions are different from each other. Further, in principle, the contents described in one embodiment or modification are similarly applied to other embodiments or modifications.
  • FIG. 1A is a side view of a main part of the lighting device 1 according to the embodiment.
  • FIG. 1B is a plan view of a main part of the lighting device 1.
  • the XY plane corresponds to the horizontal plane in use and the Z direction corresponds to the vertical direction in use.
  • the X-axis direction is the optical axis direction, and the light is assumed to travel in the negative direction of the X-axis.
  • the horizontal direction in the used state may be simply described as "horizontal direction”
  • the vertical direction in the used state may be simply described as "vertical direction”.
  • a substantially rectangular substrate 2 having a plate surface vertically supported and a horizontal direction as a longitudinal direction has one light source 3 for a high beam and three light sources 4 for a low beam. Is provided, and the optical axes of the light sources 3 and 4 are set in the horizontal direction orthogonal to the plate surface of the substrate 2. Further, the light source 4 for the low beam is arranged above the light source 3 for the high beam in the vertical direction. Since the projected light is turned upside down by the outer lens 8 described later, it is arranged on the lower side for the high beam and on the upper side for the low beam. As the light sources 3 and 4, a point light source using an LED (Light Emitting Diode) or the like is used. Further, in the illustrated example, the number of the light source 3 for the high beam is one, and the number of the light source 4 for the low beam is three, but the present invention is not limited to this.
  • the inner lens 5 for the high beam is arranged in front of the light source 3 for the high beam on the optical axis.
  • An inner lens 6 for a low beam is arranged in front of the light source 4 for a low beam on the optical axis.
  • the inner lens 6 for the low beam is arranged above the inner lens 5 for the high beam in the vertical direction.
  • a flat plate 7 made of aluminum or the like is provided between the inner lens 5 for the high beam and the inner lens 6 for the low beam, but the plate 7 may be omitted.
  • the outer lens 8 is arranged in front of the inner lens 5 for the high beam and the inner lens 6 for the low beam on the optical axis. Details of each lens will be described later. Further, the substrate 2, the inner lenses 5, 6, the plate 7, and the outer lens 8 are supported in a predetermined housing by a support structure (not shown).
  • the lighting device 1 of the present embodiment as compared with the conventional reflector type lighting device, there is no reflector, and the high beam and the low beam are switched by turning off and turning on the light sources 3 and 4, so that the light beam is mechanically switched. Since a large shade portion is not required, the lighting device 1 can be significantly downsized. Further, since the emission surface of the inner lenses 5 and 6 becomes a pseudo light source (pseudo light source) and the pseudo light source is significantly smaller than the reflector, the size of the outer lens 8 that projects the image of the light is also suppressed. From this point as well, the lighting device 1 can be miniaturized.
  • FIG. 2A is a side view of the inner lens 5 for the high beam.
  • FIG. 2B is a plan view of the inner lens 5 for the high beam.
  • FIG. 2C is a front view of the inner lens 5 for the high beam.
  • FIG. 2D is a rear view of the inner lens 5 for the high beam.
  • FIG. 2E is a bottom view of the inner lens 5 for the high beam.
  • the inner lens 5 for the high beam is integrally formed of a material such as transparent resin or glass as a whole, and the entire surface is composed of an optical surface.
  • the inner lens 5 for the high beam includes an incident surface 5a facing the light source 3 (FIGS. 1A and 1B) and an emitting surface 5b facing the outer lens 8.
  • the incident surface 5a is a surface perpendicular to the optical axis.
  • the corner of the exit surface 5b may be a quadrangular shape, a polygonal shape, or an R shape.
  • the emission surface 5b is composed of a tip portion 5c and a peripheral portion 5d around the tip portion 5c, and both of them form a convex-shaped portion facing the outer lens 8.
  • the emission surface 5b may be a flat surface, or may be an arc surface or an nth-order curved surface continuous with the tip portion 5c and the peripheral portion 5d.
  • the vertical thickness of the exit surface 5b is larger than the vertical thickness of the incident surface 5a, which is the thickness of the exit surface 5b required for the size of the projected light and the light source 3 (FIG. 1A, FIG. 1A, This is to match the thickness of the incident surface 5a corresponding to the size of the light emitting portion in FIG. 1B).
  • the light distribution in the vertical direction is set thicker as the projected light of the headlamp.
  • the vertical thickness of the exit surface 5b may be relatively smaller than the vertical thickness of the incident surface 5a.
  • the upper surface 5e of the inner lens 5 is a flat surface, and the lower surface 5f is a tapered curved surface from a thick exit surface 5b to a thin incident surface 5a. Further, the inner lens 5 is provided with a wing portion 5g projecting to the left and right in the horizontal direction with respect to the optical axis. The wing portion 5g is used for fixing the inner lens 5 and the like. An R-plane shape or a C-plane shape may be formed in the connection portion of each surface constituting the inner lens 5.
  • FIG. 3 is a diagram showing an example of the arrangement of the inner lens 5 for the high beam with respect to the focal curved surface FF of the outer lens 8.
  • the outer lens 8 has a focal curved surface FF for adapting to the wide emission surface of the inner lens 6 for a low beam.
  • the emission surface of the inner lens 5 for the high beam as with the inner lens 6 for the low beam, if the entire surface of the emission surface is aligned with the focal curved surface FF, the luminous intensity of the central portion of the projected light disappears and the vehicle travels. It is not preferable as a light distribution characteristic for a high beam because the visibility of the center of the direction is lowered.
  • the central portion of the tip portion 5c is positioned on the focal curved surface FF, and the farther away from the center with respect to the optical axis, the gradually away from the focal curved surface FF.
  • the light distribution characteristics including the gradient of luminous intensity can be controlled by the shape (free curved surface shape) of the convex portion of the exit surface 5b composed of the tip portion 5c and the peripheral portion 5d.
  • the exit surface 5b of the inner lens 5 is separated from the center with respect to the optical axis with respect to the focal curved surface FF even in the vertical plane.
  • the shape gradually separates. That is, it is designed to move away from the focal surface FF in a three-dimensional direction.
  • FIG. 4A is a plan view showing an example of the shape pattern of the emission surface 5b of the inner lens 5 for the high beam.
  • FIG. 4B is a side view showing an example of the shape pattern of the emission surface 5b of the inner lens 5 for the high beam.
  • the peripheral portion 5d of the exit surface 5b has an inwardly concave pattern as shown by the broken line m and an outwardly convex pattern as shown by the broken line n. And can be selected.
  • a straight line connecting the end points of the arcs of the broken lines m and n can be used.
  • the maximum luminous intensity (maximum luminous intensity) moves downward.
  • the pattern of the broken line n having a convex shape to the outside light is easily emitted from the peripheral portion 5d, the internal reflection is reduced, so that the efficiency is high, and the amount of light emitted in the front downward direction of the inner lens 5 is relatively large.
  • the maximum luminous intensity moves upward as the projected light after passing through the outer lens 8.
  • the pattern of the broken line m having a concave shape inward is preferable.
  • FIG. 5A is a diagram showing an example of high beam projected light according to a comparative example.
  • the tip portion 5c and the peripheral portion 5d instead of only the central portion of the tip portion 5c of the inner lens 5 being located on the focal curved surface FF as shown in FIG. 3, the tip portion 5c and the peripheral portion 5d have a concave shape and are on the focal curved surface FF. The concave shape overlaps with.
  • the projected light has substantially the same luminous intensity in the central portion as shown in FIG. 5A.
  • the horizontal line indicates the horizontal line H (the boundary between the road surface on a flat road surface and the scenery above it), and the vertical line indicates the vertical line V (the front of the vertical center line of the vehicle body). ing.
  • FIG. 5B is a diagram showing an example of the projected light of the high beam according to the embodiment.
  • the structure of FIG. 3 forms a gradient of luminous intensity in the central portion, and the visibility of the center in the traveling direction can be improved. .. Further, the maximum luminous intensity bites slightly below the horizontal line H due to the pattern of the broken line m having a concave shape inside FIGS. 4A and 4B. Even with high beams, it is important to illuminate a part of the road surface, and the visibility of the road surface can be improved.
  • the fact that the luminous intensity distribution spreads above the horizontal line H is a basic light distribution characteristic as a high beam, and is realized by the inner lens 5 for the high beam being formed asymmetrically in the vertical direction. .. As a whole, according to the embodiment, a preferable high beam light distribution characteristic can be obtained.
  • FIG. 6A is a plan view showing another example of the emission surface 5b of the inner lens 5 for the high beam.
  • FIG. 6B is a side view showing another example of the emission surface 5b of the inner lens 5 for the high beam.
  • the convex portion of the exit surface 5b composed of the tip portion 5c and the peripheral portion 5d is composed of a stepped surface.
  • the tip portion 5c is set as the first step and the peripheral portion 5d is set as the second step, and the number of steps is 2, but the number of steps may be further increased. By increasing the number of steps, it approaches a curved surface.
  • a polygonal shape may be used instead of the stepped shape.
  • the tip portion 5c and the peripheral portion 5d constituting the exit surface 5b of the inner lens 5 for the high beam are smooth surfaces.
  • fine prism processing or grain processing may be applied to all or part of the material. This can improve the sudden change in the gradient of luminosity.
  • fine prism processing or grain processing may be applied to all or a part of the incident surface 5a of the inner lens 5 for the high beam.
  • the prism processing for example, one having a V-shaped cross section and extending uniformly in the thickness direction is used.
  • FIG. 7 is a diagram showing an example of the operation of the overhead function.
  • the overhead function is a low beam, but the light in the high beam region is simultaneously irradiated.
  • it is required to realize an overhead function in order to improve the visibility of signs and the like.
  • the high beam light and the low beam light are individually irradiated to each region, so that the above overhead function can be realized. It's not easy.
  • FIG. 7 in the present embodiment, a part of the light emitted from the low beam light source 4 is incident on the high beam inner lens 5, and the light emitted from the high beam inner lens 5 is used for the low beam.
  • the overhead function is realized by superimposing it on the light emitted from the inner lens 6 of the above.
  • the light incident on the inner lens 6 for the low beam and the inner lens 5 for the high beam through the air layer from the light source 4 for the low beam is shown by a broken line with an arrow, but other light paths. There are the following two. One is a path in which the light emitted from the low beam light source 4 is directly incident on the high beam inner lens 5.
  • the other is a path in which the light emitted from the low beam light source 4 is reflected on the incident surface 6a of the low beam inner lens 6 and further reflected on the substrate 2 to be incident on the high beam inner lens 5. .. Of these three light paths, the light in the path indicated by the broken line with an arrow in FIG. 7 is controlled by the plate 7. The details of the structure of the inner lens 6 will be described later.
  • FIG. 8 is a diagram showing an example of a notch 7b provided in the plate 7.
  • the light source 4 for the low beam to the inner lens for the low beam.
  • the amount of light incident on the inner lens 5 for the high beam through the 6 and the air layer is adjusted.
  • the light incident on the high beam inner lens 5 from the low beam light source 4 through the low beam inner lens 6 is the high beam inner lens 5 and the low beam inner lens 5 even when the plate 7 does not exist. Since it varies depending on the distance from the lens 6, the plate 7 can be eliminated if the distance between the inner lenses 5 and 6 can be appropriately controlled.
  • the adjustment by the notch 7b of the plate 7 and the adjustment of the distance between the inner lenses 5 and 6 may be used in combination.
  • FIG. 9 is a diagram showing an example of a low beam projected light to which an overhead function is added.
  • the overhead portion OH is a portion of light superimposed by the overhead function.
  • FIG. 10 is a diagram showing an example of another method for realizing the overhead function.
  • a part of the light from the low beam light source 4 is guided to the high beam inner lens 5 with the high beam light source 3 turned off.
  • the light source 4 for the low beam is turned on and the light source 3 for the high beam is slightly turned on (for example, a few percent or less of the complete lighting). This can be achieved by supplying a smaller current to the LEDs constituting the light source 3 for the high beam than when the lights are completely lit.
  • the overhead function can be adjusted by the value of the current supplied to the LED constituting the light source 3 for the high beam. In this case, it is not necessary to adjust the amount of light by the notch 7b (FIG. 8) of the plate 7, but the method of FIG. 7 and the method of FIG. 10 may be used in combination.
  • FIG. 11 is a perspective view of the outer lens 8.
  • the outer lens 8 is a substantially hemispherical lens that is laid on its side, the lower half of the hemisphere on the cut surface side is a flat surface 8a, and the apex of the upper half is at the center of the circle of the cut surface. Therefore, a tapered cut surface 8b that is convex on the incident side is formed.
  • the tapered cut surface 8b that is convex on the incident side is not limited to the curved surface that is convex on the incident side.
  • FIG. 12 is a diagram showing an example of refraction of light in the horizontal plane of the outer lens 8.
  • FIG. 13 is a diagram showing an example of refraction of light in the vertical plane of the outer lens 8.
  • the light incident on the outer lens 8 is refracted by the tapered cut surface 8b of the outer lens 8 toward the optical axis side (center side) as shown by the solid line with an arrow (taper cut surface 8b). If there is no light, the light is a broken line with an arrow).
  • the angle and max luminosity can be controlled. With such a function, for example, the following light distribution characteristics can be obtained.
  • FIG. 14A is a diagram showing an example of the projected light of the high beam when the tapered cut surface is not provided.
  • FIG. 14B is a diagram showing an example of the projected light of the high beam according to the embodiment.
  • a portion having a high luminous intensity (a portion drawn in white in the figure) is generated on the left and right other than the center, but the taper cut surface is provided.
  • the portions having high luminous intensity are gathered in the center, and the visibility of the center in the traveling direction can be improved. Further, the max luminous intensity can be controlled slightly below the horizontal line H.
  • FIG. 15A is a diagram showing an example of low beam projected light when the tapered cut surface is not provided.
  • FIG. 15B is a diagram showing an example of a low beam projected light according to an embodiment.
  • the central portion having high luminous intensity is long in the vertical direction, but in FIG. 15B showing the embodiment in which the tapered cut surface is provided, the central portion having high luminous intensity is provided. The portion of is shortened in the vertical direction, the spot feeling is improved, and the visibility can be improved.
  • the upper half of the incident surface of the outer lens 8 is provided with a curved surface that is convex on the incident side represented by the tapered cut surface 8b, but the curved surface that is convex on the incident side is incident. It may be provided on the lower half of the surface, or may be provided on a part of the incident surface such as a fan shape. This is because the light from the exit surfaces 5b and 6b of the inner lenses 5 and 6 placed on the substantially focal point of the outer lens 8 passes through the entire surface of the incident surface of the outer lens 8.
  • the ratio of the curved surface that is convex to the incident side with respect to the entire incident surface corresponds to the ratio of the light that is refracted inward in the horizontal plane and the vertical plane among the light that passes through the entire surface of the incident surface.
  • FIG. 16A is a side view of the inner lens 6 for the low beam.
  • FIG. 16B is a plan view of the inner lens 6 for the low beam.
  • FIG. 16C is a front view of the inner lens 6 for a low beam.
  • FIG. 16D is a rear view of the inner lens 6 for a low beam.
  • FIG. 16E is a bottom view of the inner lens 6 for the low beam.
  • the inner lens 6 for low beam is integrally formed of a material such as transparent resin or glass as a whole, and the entire surface is composed of an optical surface.
  • the low beam inner lens 6 includes an incident surface 6a facing the light source 4 (FIGS. 1A and 1B) and an emitting surface 6b facing the outer lens 8.
  • the incident surface 6a is a surface perpendicular to the optical axis.
  • the exit surface 6b is a curved surface having a shape along the focal curved surface (focal curve) of the outer lens 8.
  • the height of the central portion (thickness in the vertical direction) of the exit surface 6b is the highest, and the height is lowered toward both ends.
  • the shape of the exit surface 6b in front view may be a circle, a polygon, an n-th order curve, or the like.
  • the shape of the emission surface 6b is set according to the required shape of the projected light. Further, either or both of the incident surface 6a and the exit surface 6b may be a smooth surface, or may be entirely or partially subjected to fine prism processing or grain processing. This makes it possible to smooth out sudden changes in luminous intensity.
  • the upper surface of the inner lens 6 connected to the incident surface 6a is a flat portion 6c, and the end portion of the flat portion 6c opposite to the incident surface 6a is connected to an inclined portion 6d rising toward the upper portion of the exit surface 6b.
  • These parts are also called slipback structures.
  • the surfaces of the flat portion 6c and the inclined portion 6d constituting the slipback structure may be smooth surfaces, or may be entirely or partially subjected to fine prism processing or grain processing. This makes it possible to adjust the reflection of light inside the inner lens 6.
  • the bottom surface 6e of the inner lens 6 is flat. Ear portions 6f are provided at both ends of the exit surface 6b. The selvage portion 6f is used for fixing the inner lens 6 and the like.
  • FIG. 17A is a diagram showing an example of the action of the slipback structure.
  • FIG. 17B is a diagram showing an example of the action of the slipback structure when the L value is shorter.
  • the width (L value) of the flat portion 6c in the optical axis direction is L1
  • a part of the light incident from the incident surface 6a is reflected on the inner surface of the flat portion 6c, and then the bottom surface 6e. It is reflected by and reaches the exit surface 6b.
  • the light reflected on the side of the flat portion 6c far from the incident surface 6a is collected near the bottom of the emitting surface 6b.
  • FIG. 18A is a diagram showing an example of low beam projected light according to a comparative example without slipback.
  • FIG. 18B is a diagram showing an example of a low beam projected light according to an embodiment.
  • the luminosity of the lower region R of the projected light is insufficient. If the luminosity of the lower part is insufficient in this way, the front side of the driver on the road surface becomes dark, which is dangerous in terms of driving.
  • the luminosity of the lower part is supplemented and the safety can be enhanced.
  • the lighting device has a light source having an optical axis in the horizontal direction in the used state, an inner lens for a high beam arranged in front of the optical axis of the light source, and an inner lens on the optical axis.
  • the inner lens has a convex portion at the tip facing the outer lens, and the convex portion has an optical axis whose center is located on the focal curve of the outer lens.
  • the farther away from the center the more gradually away from the focal curve.
  • the convex portion is composed of a continuous curved surface or a stepped surface. This makes it possible to control the light distribution characteristics in various ways.
  • the inner lens is asymmetrical in the vertical direction in the used state, and has a concave curved portion in the horizontal direction left and right in the used state and below the vertical direction in the used state around the tip of the convex portion. This makes it possible to obtain a light distribution suitable for a high beam.
  • the inner lens is thicker in the vertical direction on the exit side than on the enter side. This makes it possible to handle a light source of a small size.
  • the convex portion and / or the incident surface of the inner lens is a smooth surface, or is partially or partially subjected to fine prism processing or grain processing. This can improve the sudden change in the gradient of luminosity.
  • a light source having an optical axis in the horizontal direction in the used state, an inner lens for a low beam arranged in front of the optical axis of the light source, and an outer lens arranged in front of the optical axis of the inner lens.
  • the inner lens is connected to the portion where the vertical vertical thickness is constant on the incoming light side and the end portion on the exit side of the portion where this thickness is constant, and the vertical vertical thickness is connected to the exit side. It has a portion where the thickness becomes large.
  • the light distribution to the lower part of the projected light of the low beam is adjusted by the width in the optical axis direction of the part having a constant thickness. As a result, it is possible to easily adjust the luminous intensity in front of the driver on the road surface.
  • the portion having a constant thickness and the portion having a large thickness are smooth surfaces, or are partially or partially subjected to fine prism processing or grain processing. As a result, the reflection of light inside the inner lens can be adjusted, and the luminous intensity in front of the driver on the road surface can be adjusted.
  • the entrance surface and the exit surface of the inner lens are smooth surfaces, or all or part of them are finely prismatic or textured. This can improve the sudden change in the gradient of luminosity.
  • a second inner lens for a low beam which is arranged on the upper side in the vertical direction in the usage state of the above, and an outer lens which is arranged in front of the optical axis of the first inner lens and the second inner lens.
  • the light emitted from the first inner lens is superimposed on the light emitted from the second inner lens based on the incident light from the second light source or the first light source to the first inner lens.
  • the second light source is transferred to the first inner lens. Adjust the amount of incident light. This makes it possible to easily adjust the degree of overhead function.
  • the amount of light incident on the first inner lens from the second light source is adjusted by the distance between the first inner lens and the second inner lens. This makes it possible to easily adjust the degree of overhead function.
  • the amount of light incident on the first inner lens from the first light source is adjusted according to the lighting state of the first light source. This makes it possible to easily adjust the degree of overhead function.
  • a curved surface that is convex on the incident side is formed on a part of the incident surface of the outer lens.
  • the curved surface is a tapered cut surface that is convex on the incident side. As a result, the outer lens can be easily manufactured.
  • the present invention is not limited to the above embodiments.
  • the present invention also includes a configuration in which the above-mentioned components are appropriately combined. Further, further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.
  • 1 lighting device 2 substrate, 3, 4 light source, 5, 6 inner lens, 5a incident surface, 5b exit surface, 5c tip, 5d peripheral, 5e upper surface, 5f lower surface, 5g wing, 6a incident surface, 6b emission Surface, 6c flat part, 6d inclined part, 6e bottom surface, 6f ear part, 7 plate, 7a curved part, 7b notch, 8 outer lens, 8a flat surface, 8b taper cut surface, H horizontal line, V vertical line, FF focus Curved surface, OH overhead part

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

Abstract

Selon le présent mode de réalisation, un dispositif d'éclairage (1) est pourvu d'une source de lumière (3), d'une lentille interne à faisceau élevé (5) et d'une lentille externe (8). En fonctionnement, la source de lumière (3) possède un axe optique dans la direction horizontale. La lentille interne à faisceau élevé (5) est disposée vers l'avant le long de l'axe optique de la source de lumière (3). La lentille externe (8) est disposée vers l'avant le long de l'axe optique de la lentille interne (5). La lentille interne (5) présente une section convexe au niveau de la pointe faisant face à la lentille externe (8). La section convexe est formée de telle sorte que son centre est situé sur la courbe focale de la lentille externe (8), et de manière à se séparer progressivement de la courbe focale à mesure que l'axe optique se sépare du centre.
PCT/JP2021/015824 2020-06-02 2021-04-19 Dispositif d'éclairage WO2021246065A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2020096450 2020-06-02
JP2020-096451 2020-06-02
JP2020-096450 2020-06-02
JP2020-096449 2020-06-02
JP2020096449 2020-06-02
JP2020096451 2020-06-02

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WO2021246065A1 true WO2021246065A1 (fr) 2021-12-09

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WO (1) WO2021246065A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015040671A1 (fr) * 2013-09-17 2015-03-26 三菱電機株式会社 Phare monté sur véhicule
JP2017010789A (ja) * 2015-06-23 2017-01-12 スタンレー電気株式会社 車両用灯具
JP2017016990A (ja) * 2015-07-06 2017-01-19 隆達電子股▲ふん▼有限公司 導光柱及びそれを用いた車両用灯具
US20170030543A1 (en) * 2015-07-28 2017-02-02 Valeo Vision Lighting system for motor vehicle headlight
WO2017164328A1 (fr) * 2016-03-24 2017-09-28 株式会社小糸製作所 Lampe de véhicule, système de commande de lampe de véhicule, et véhicule doté de la lampe de véhicule et du système de commande de lampe de véhicule
JP2017199660A (ja) * 2016-04-11 2017-11-02 ヴァレオ ビジョンＶａｌｅｏ Ｖｉｓｉｏｎ 光ビームを放出するための自動車両ヘッドライト・モジュール
JP2017212037A (ja) * 2016-05-23 2017-11-30 スタンレー電気株式会社 車両用前照灯
WO2020075536A1 (fr) * 2018-10-10 2020-04-16 市光工業株式会社 Guide de lumière pour véhicules, et lampe pour véhicules

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015040671A1 (fr) * 2013-09-17 2015-03-26 三菱電機株式会社 Phare monté sur véhicule
JP2017010789A (ja) * 2015-06-23 2017-01-12 スタンレー電気株式会社 車両用灯具
JP2017016990A (ja) * 2015-07-06 2017-01-19 隆達電子股▲ふん▼有限公司 導光柱及びそれを用いた車両用灯具
US20170030543A1 (en) * 2015-07-28 2017-02-02 Valeo Vision Lighting system for motor vehicle headlight
WO2017164328A1 (fr) * 2016-03-24 2017-09-28 株式会社小糸製作所 Lampe de véhicule, système de commande de lampe de véhicule, et véhicule doté de la lampe de véhicule et du système de commande de lampe de véhicule
JP2017199660A (ja) * 2016-04-11 2017-11-02 ヴァレオ ビジョンＶａｌｅｏ Ｖｉｓｉｏｎ 光ビームを放出するための自動車両ヘッドライト・モジュール
JP2017212037A (ja) * 2016-05-23 2017-11-30 スタンレー電気株式会社 車両用前照灯
WO2020075536A1 (fr) * 2018-10-10 2020-04-16 市光工業株式会社 Guide de lumière pour véhicules, et lampe pour véhicules

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