WO2024062910A1 - Dispositif électroluminescent, unité de source de lumière et véhicule - Google Patents

Dispositif électroluminescent, unité de source de lumière et véhicule Download PDF

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Publication number
WO2024062910A1
WO2024062910A1 PCT/JP2023/032262 JP2023032262W WO2024062910A1 WO 2024062910 A1 WO2024062910 A1 WO 2024062910A1 JP 2023032262 W JP2023032262 W JP 2023032262W WO 2024062910 A1 WO2024062910 A1 WO 2024062910A1
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WO
WIPO (PCT)
Prior art keywords
light
emitting device
light emitting
lens
light source
Prior art date
Application number
PCT/JP2023/032262
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English (en)
Japanese (ja)
Inventor
喜彦 金山
Original Assignee
パナソニックＩｐマネジメント株式会社
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Publication of WO2024062910A1 publication Critical patent/WO2024062910A1/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
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/13—Ultraviolet light; Infrared light
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/70—Prevention of harmful light leakage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • 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

Definitions

  • the present invention relates to a light emitting device, a light source unit, and a vehicle.
  • Patent Document 1 discloses a device that is disposed on a door mirror (side mirror) of a vehicle and projects a pattern onto the ground outside the vehicle using light.
  • a door mirror may be provided with a light emitting device that emits light and an imaging device that captures an image of the road surface.
  • This type of imaging device captures an image of a road surface by detecting reflected light from a road surface, obstacles, etc. of light emitted from a light emitting device. At this time, if the imaging device detects light reflected by a vehicle or the like, halation may occur in the image generated by the imaging device.
  • the present invention provides a light-emitting device that can suppress halation in images generated by an imaging device.
  • a light-emitting device is a light-emitting device supported by a support body along with an imaging device that detects light emitted by the light-emitting device, and includes a light source and (i) light emitted by the light source. (ii) has an entrance surface through which light enters, and a bowl-shaped portion that widens as it moves away from the light source; and (ii) an exit surface through which light incident on the entrance surface exits, and projects in a direction away from the light source. a lens having a convex portion, the convex portion having a first total reflection surface that is at least a part of the exit surface and totally reflects light incident on the input surface.
  • the bowl-shaped portion has a second total reflection surface that is located in a direction intersecting the optical axis of the light emitted from the light source and totally reflects the light incident on the incidence surface
  • the light emitting device includes a first attenuator that reduces at least a portion of the light that is incident on the lens and is emitted toward the support body located in a direction intersecting the optical axis of the light emitted from the light source. Equipped with a light section.
  • a light source unit includes the light emitting device described above and the imaging device.
  • a vehicle according to one aspect of the present invention includes the light source unit described above, and is the support.
  • the light emitting device can suppress halation in images generated by an imaging device.
  • FIG. 1 is a front view showing a vehicle according to an embodiment.
  • FIG. 2 is a sectional view showing the configuration of the light source unit according to the embodiment.
  • FIG. 3 is a cross-sectional view showing the configuration of the light emitting device according to the embodiment.
  • FIG. 4 is a cross-sectional view for explaining how light travels in a light emitting device according to a comparative example.
  • FIG. 5 is a cross-sectional view showing the configuration of a light emitting device according to the first modification.
  • FIG. 6 is a sectional view showing the configuration of a light emitting device according to Modification Example 2.
  • each figure is a schematic diagram and is not necessarily a precise illustration. Therefore, for example, the scales of each figure do not necessarily match.
  • each figure is a schematic diagram in which emphasis, omissions, and ratios have been appropriately adjusted in order to illustrate the present invention, and may differ from the actual shapes, positional relationships, and ratios.
  • substantially identical configurations are given the same reference symbols, and duplicate explanations may be omitted or simplified.
  • the Z-axis direction is, for example, a vertical direction, and the positive direction of the Z-axis is sometimes described as upward, and the negative direction of the Z-axis is sometimes described as downward.
  • the Y-axis direction and the X-axis direction are directions perpendicular to each other on a plane (horizontal plane) perpendicular to the Z-axis.
  • the Y-axis direction may be described as the side of the vehicle.
  • the positive direction of the X-axis may be described as the direction in which the vehicle travels (forward)
  • the negative direction of the X-axis may be described as the direction opposite to the direction in which the vehicle travels (rearward).
  • terms indicating relationships between elements such as the same, numerical values, and numerical ranges are not expressions that express only strict meanings, but are expressions that indicate a substantially equivalent range, such as a few percent. This expression means that it also includes a difference of about 5% (for example, about 5%).
  • horizontal direction means not only a completely horizontal direction, but also includes an error of several percent, such as 5%, that occurs during manufacturing or placement.
  • ordinal numbers such as “first” and “second” do not mean the number or order of components, unless otherwise specified, and to avoid confusion between similar components, It is used to distinguish between elements.
  • FIG. 1 is a front view showing a vehicle 10 according to an embodiment. Note that in FIG. 1, light emitted by the light emitting device 200 (emitted light) is shown by a broken line.
  • the vehicle 10 is a moving object such as a car or a motorcycle that includes a light source unit 100.
  • vehicle 10 is an automobile.
  • Vehicle 10 is an example of a support.
  • the vehicle 10 includes a vehicle body 20, a door mirror 30, and a light source unit 100.
  • the vehicle body 20 has door mirrors 30 attached to its side portions, and is a vehicle body on which a driver gets in and drives the vehicle.
  • the vehicle body 20 supports door mirrors 30 at both side portions of the vehicle body 20.
  • the door mirror 30 is a side mirror attached to a side portion of the vehicle body 20.
  • a light source unit 100 is arranged in the door mirror 30.
  • a light emitting device 200 and an imaging device 300 are attached to the door mirror 30.
  • the light emitting device 200 and the imaging device 300 are attached to the door mirror 30 in the order of distance from the vehicle body 20.
  • the vehicle 10 includes the light emitting device 200 and the imaging device 300 in each of the door mirrors 30 located on both sides of the vehicle body 20 (both sides in the Y-axis direction), but only one of the door mirrors 30 includes the light emitting device 200 and the imaging device 300.
  • a light emitting device 200 and an imaging device 300 may be included.
  • an imaging device 300 and a light emitting device 300 are attached to the door mirror 30 in the order of distance from the vehicle body 20.
  • the light source unit 100 is an optical unit that emits light toward a road surface located around the vehicle 10 and detects reflected light that is reflected from the road surface. That is, the light source unit 100 emits light onto the road surface and images the road surface.
  • the light source unit 100 includes a light emitting device 200 and an imaging device 300.
  • the light emitting device 200 and the imaging device 300 included in the light source unit 100 are arranged on the outer surface of the vehicle 10, for example. Specifically, the light emitting device 200 is attached to the vehicle 10 at a position where the light emitting device 200 can irradiate light onto the road surface around the vehicle 10 when the light is emitted downward. In this embodiment, the light source unit 100 is arranged on the door mirror 30.
  • outer surface refers not only to the outer surface of the vehicle body 20, but also to the outer surface of a component attached to the vehicle body 20, such as the outer surface of the side or lower surface of the door mirror 30, or the outer surface of a door included in the vehicle 10. include. Further, when the vehicle 10 is provided with the light emitting device 200 and the imaging device 300 on the outer surface, it does not mean that the light emitting device 200 and the imaging device 300 are arranged on the outer surface, but also when the light emitting device 200 and the imaging device 300 are disposed on the outer surface of the vehicle. 10 is also included.
  • the light emitting device 200 is a light source section that is supported by the vehicle 10 (more specifically, the door mirror 30 included in the vehicle 10) along with the imaging device 300 that detects the light emitted by the light emitting device 200.
  • the light emitting device 200 is attached to the vehicle 10 together with the imaging device 300, and emits light onto the road surface.
  • light emitting device 200 emits near-infrared light.
  • the near-infrared light emitted by the light-emitting device 200 is, for example, light with a wavelength band of 800 nm or more.
  • the near-infrared light emitted by the light-emitting device 200 may have a wavelength band of 910 nm to 970 nm.
  • the intensity of sunlight with a wavelength of about 940 nm is weaker than other wavelength bands. Therefore, if the wavelength band of the near-infrared light emitted by the light-emitting device 200 is 940 ⁇ 30 nm, the road surface can be accurately captured by the imaging device 300 even if the light detection wavelength of the imaging device 300 is about 940 nm.
  • the light emitting device 200 is attached to the door mirror 30. Specifically, the light emitting device 200 is attached below the door mirror 30.
  • the light emitting device 200 is attached to the door mirror 30 so that the optical axis of the emitted light (dashed line in FIG. 2) is vertical as shown in FIG. 2 described later, but the light emitting device 200 may be attached to the vehicle 10 (e.g., the vehicle body 20 and/or the door mirror 30) so that the optical axis of the emitted light is inclined relative to the vertical direction (more specifically, the normal direction of the road surface on which the vehicle 10 is located).
  • the light emitting device 200 may be attached to the door mirror 30 so that the optical axis is inclined by about 10° to 20° relative to the vertical direction and emits light on the opposite side to the vehicle body 20.
  • the light emitting device 200 emits light toward the road surface located on the side of the vehicle 10, but it may also emit light toward the road surface in the front region and/or rear region of the vehicle 10. good.
  • the light emitting device 200 is arranged on the door mirror 30 so as not to emit light at least above the horizontal direction.
  • the light emitting device 200 may be arranged vertically below the imaging device 300. Thereby, by disposing the light emitting device 200 in the vehicle 10 so as to emit light downward, it is possible to suppress the light from the light emitting device 200 from directly entering the imaging device 300.
  • the imaging device 300 is a camera that images the road surface. Specifically, the imaging device 300 detects the light emitted from the light emitting device 200 and reflected on the road surface. That is, specifically, the imaging device 300 is attached to the door mirror 30 so that the light emitted by the light emitting device 200 and reflected on the road surface can be detected. The imaging device 300 generates an image of the road surface by detecting light reflected from the road surface around the vehicle 10 .
  • the light-emitting device 200 is, for example, a near-infrared light source that emits near-infrared light
  • the imaging device 300 is a near-infrared light source that emits near-infrared light
  • the imaging device 300 is a near-infrared light source that emits near-infrared light.
  • Near-infrared light emitted from 200 and reflected on the road surface is detected.
  • the imaging device 300 includes an imaging element such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor.
  • an imaging element such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor.
  • the vehicle body 20, the light emitting device 200, and the imaging device 300 are arranged in this order.
  • the vehicle body 20, the imaging device 300, and the light emitting device 200 may be arranged in this order.
  • the imaging device 300 may be located on the opposite side of the light emitting device 200 from the direction in which the light emitting device 200 emits light (in the present embodiment, downward and in the negative Z-axis direction). That is, the imaging device 300 may be located above the light emitting device 200. In this embodiment, the imaging device 300 is located above the light emitting device 200.
  • the light emitted from the light emitting device 200 is prevented from being directly incident on the imaging device 300 without being reflected on the road surface.
  • the light source unit 100 may include a light shielding section that is located between the imaging device 300 and the light emitting device 200 and blocks the light emitted by the light emitting device 200.
  • the light shielding portion may have a function of blocking the light, and may have a reflective property for the light, or may have an absorptive property for the light.
  • a control device that controls the light emitting device 200 and the imaging device 300 may be disposed in the vehicle 10.
  • the control device performs control so that the timing of light emission by the light emitting device 200 and the timing of photographing by the imaging device 300 are aligned.
  • the control device synchronizes and controls the light emitting device 200 and the imaging device 300 so that the imaging device 300 can appropriately detect the reflected light obtained by reflecting the light emitted by the light emitting device 200 on the road surface.
  • the control device performs PWM (Pulse with Modulation) control (PWM lighting) of the light emitting device 200 in synchronization with the imaging device 300, for example.
  • PWM Pulse with Modulation
  • the control device includes, for example, an interface to which control lines for controlling the light emitting device 200 and the imaging device 300 are connected, a nonvolatile memory in which a program is stored, and a volatile memory that is a temporary storage area for executing the program. It is realized by physical memory, a processor that executes programs, etc.
  • FIG. 2 is a cross-sectional view showing a light emitting device 200 according to an embodiment. Note that FIG. 2 is a diagram showing a cross section of the light emitting device 200 and the imaging device 300 arranged on the door mirror 30 located on the right side when the vehicle 10 is viewed from the front.
  • the light emitting device 200 includes a lid part 210, a terminal part 213, a packing 214, a heat sink 215, a heat dissipation sheet 216, a buffer material 217, a light source 220, a lens 230, a substrate 240, and a transparent cover 250. , is provided.
  • the lid portion 210 is a cover body for attaching the light emitting device 200 to the door mirror 30.
  • the lid portion 210 is formed with an attachment portion 211, and the attachment portion 211 is formed with a screw hole for attaching, for example, a screw 212.
  • the light emitting device 200 is attached to the door mirror 30 by screwing the screw 212 into the attachment portion 211.
  • the material of the lid portion 210 is not particularly limited, but for example, a resin material such as PBT (Polybutyleneterephthalate) or polycarbonate, or a metal material is used.
  • the terminal portion 213 is a terminal for supplying power from an external power source (not shown) to the light source 220.
  • the terminal portion 213 and the light source 220 are electrically connected by metal wiring (not shown) or the like.
  • the packing 214 is a buffer material located between the lens 230 and the heat sink 215.
  • the packing 214 is made of, for example, an elastic resin material such as rubber.
  • the heat sink 215 is a heat radiating member that is disposed on the back surface 242 side of the substrate 240, which is the surface opposite to the main surface 241, which is the surface on which the light source 220 is disposed, and radiates the heat generated by the light source 220.
  • heat sink 215 is supported by lid portion 210.
  • the heat sink 215 is made of, for example, aluminum metal, stainless steel, or the like, which has high thermal conductivity.
  • a substrate 240 is placed on the heat sink 215 with a heat dissipation sheet 216 interposed therebetween.
  • the heat dissipation sheet 216 is a sheet-like member that facilitates dissipation of heat generated by the light source 220 from the substrate 240 to the heat sink 215.
  • the material used for the heat dissipation sheet 216 is not particularly limited, and for example, a resin material may be used. Further, the heat dissipation sheet 216 may have electrical insulation properties.
  • the cushioning material 217 is a member placed between the door mirror 30 and the lens 230.
  • the cushioning material 217 is, for example, an elastic member such as a sponge.
  • the light source 220 is a light source that emits light.
  • the light source 220 emits, for example, near-infrared light.
  • the light source 220 includes, for example, a solid-state semiconductor light source such as an LED (Light Emitting Diode), and a lens that covers the solid-state semiconductor light source.
  • the lens 230 is an optical member into which the light emitted by the light source 220 is incident, and which emits the incident light. Specifically, the lens 230 is arranged to cover the lower part of the light source 220, receives the light emitted from the light source 220, controls the light distribution of the incident light, and emits the light toward the road surface. It's a lens.
  • the lens 230 (more specifically, the base material of the lens 230) is formed of, for example, a transparent glass material or a transparent resin material such as acrylic or polycarbonate.
  • the light source 220 is mounted (arranged) on the substrate 240 so that the optical axis of the light emitted from the lens 230 coincides with the optical axis of the lens 230.
  • the lens 230 is attached to the main surface 241 of the substrate 240 with an adhesive or the like, for example.
  • the substrate 240 is a substrate on which the light source 220 is placed.
  • the substrate 240 is arranged in contact with the lens 230 at the main surface 241 on which the light source 220 is placed.
  • the material of the substrate 240 is not particularly limited, but may be, for example, a metal substrate, a ceramic substrate, or a resin substrate.
  • the substrate 240 may be a flexible substrate or a rigid substrate.
  • the light-emitting device 200 may be attached to the door mirror 30 so that the optical axis of the light emitted by the light source 220 is parallel to the vertical direction, or may be arranged so that the optical axis of the light emitted by the light source 220 intersects with the vertical direction.
  • the light-emitting device 200 may be arranged, for example, so that the light emitted by the light source 220 is emitted in a direction away from the vehicle body 20.
  • the light-transmitting cover 250 is a cover member that covers the lens 230. Further, the light-transmitting cover 250 has a property of transmitting light emitted by the light source 220 (for example, a property of transmitting 90% or more of the light). That is, the light emitted from the lens 230 is transmitted through the light-transmitting cover 250.
  • the light-transmitting cover 250 has a bowl shape that projects downward and is open at the top.
  • the light source 220, lens 230, and substrate 240 are housed in a transparent cover 250.
  • the upper part of the transparent cover 250 is closed by the lid part 210.
  • the light-transmitting cover 250 (more specifically, the base material of the light-transmitting cover 250) is formed of, for example, a transparent glass material or a transparent resin material such as acrylic or polycarbonate.
  • the shape of the light-transmitting cover 250 is a convex shape projecting downward, but is not particularly limited, and may be a planar shape, for example.
  • the light-transmitting cover 250 may have a so-called lens function that refracts incident light.
  • the radius of curvature of the light-transmitting cover 250 (for example, the radius of curvature of the inner surface of the light-transmitting cover 250 and the radius of curvature of the outer surface of the light-transmitting cover 250) may be set arbitrarily.
  • the radius of curvature of the inner and outer surfaces of the light-transmitting cover 250 may each be 10 m or less.
  • FIG. 3 is a cross-sectional view showing the configuration of the light emitting device 200 according to the embodiment. Note that, in FIG. 3, among the plurality of components included in the light emitting device 200, a light source 220, a lens 230, a substrate 240, and a light-transmitting cover 250 are shown in an enlarged manner. Furthermore, in FIG. 3, the light emitted from the light source 220 is indicated by a broken line arrow.
  • the lens 230 includes a bowl-shaped portion 233 and a convex portion 234 that is formed integrally with the bowl-shaped portion 233 and protrudes from the bowl-shaped portion 233 to the side opposite to the light source 220.
  • the bowl-shaped portion 233 has an entrance surface 231 into which the light emitted by the light source 220 is incident, and has a shape that widens as it moves away from the light source 220. Further, the bowl-shaped portion 233 is a surface (that is, a side surface) located in a direction intersecting the optical axis of the light emitted from the light source 220, and is a second total surface that totally reflects the light incident on the incident surface 231. It has a reflective surface 236. That is, among the light emitted from the light source 220 and incident on the entrance surface 231, the light directed toward the second total reflection surface 236 is totally reflected by the second total reflection surface.
  • the entrance surface 231 has a concave shape on the side opposite to the light source 220.
  • the convex portion 234 has an exit surface 232 from which the light incident on the entrance surface 231 is output, and has a shape that projects in a direction away from the light source 220. Further, the convex portion 234 has a first total reflection surface 235 that is at least a part of the output surface 232 and totally reflects the light incident on the entrance surface 231. For example, the light source 220 and the lens 230 are arranged such that the top of the convex portion 234 overlaps with the optical axis of the light emitted by the light source 220.
  • the output surface 232 is composed of, for example, a surface of the bowl-shaped portion 233 located on the opposite side of the light source 220 and a first total reflection surface 235.
  • the light emitting device 200 is located in a direction intersecting the optical axis of the light emitted by the light source 220 (in the negative Y-axis direction as seen from the light source 220 in this embodiment) out of the light incident on the lens 230.
  • the vehicle body 20 includes a light attenuation section (first light attenuation section) that reduces at least part of the light emitted toward the vehicle body 20.
  • the light emitting device 200 includes a recess 237 as a first light attenuation section.
  • the recess 237 reduces at least a portion of the light emitted from the lens 230 toward the vehicle body 20 .
  • the recess 237 is a recess provided in the entrance surface 231.
  • the recess 237 is provided on the side of the entrance surface 231 opposite to the vehicle body 20 when viewed from the light source 220 (in other words, when viewed from the optical axis).
  • the lens 230 becomes a non-rotating body.
  • FIG. 4 is a cross-sectional view for explaining how light travels in light-emitting device 200A according to a comparative example.
  • the cross-section of light-emitting device 200A shown in FIG. 4 is a cross-section at a position corresponding to the cross-section of light-emitting device 200 shown in FIG. 3.
  • the light emitted from light source 220 is indicated by dashed arrows.
  • the emission direction of light from light source 220 shown in FIG. 3 is the same as the emission direction of light from light source 220 shown in FIG. 4.
  • the light emitting device 200A includes a lens 230A having a different shape from the lens 230 included in the light emitting device 200.
  • lens 230A does not have a recess 237.
  • Lens 230A is a rotating body with the optical axis of lens 230A (in this embodiment, the optical axis of the light emitted by light source 220) as its axis.
  • a light emitting device 200A using such a lens 230A and a light source 220 for example, as shown in FIG. You may be heading to
  • the lens 230 is provided with the recess 237 as shown in FIG. 3, unlike the way the light travels as shown in FIG.
  • the light incident on the second total reflection surface 236 is directed toward the second total reflection surface 236. Further, the light reflected by the second total reflection surface 236 is emitted from the lens 230 toward the side opposite to the vehicle body 20.
  • the first light attenuation section reduces the first total of the light emitted from the light source 220 when the light emitting device 200 does not include the first light attenuation section. It is provided in the optical path of light passing through the reflective surface 235. In the present embodiment, the recess 237 is provided in the optical path of the light emitted from the light source 220 that passes through the first total reflection surface 235 when the light emitting device 200 does not include the first light attenuation section. There is.
  • the lens is a collimator lens having a total reflection surface like the first total reflection surface 235, the light emitted from the lens is suppressed from going toward the vehicle 10.
  • the size, groove depth, shape, etc. of the recess 237 may be arbitrarily set so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
  • light attenuation means, for example, that light is emitted from the lens 230 and reaches the vehicle body 20 due to diffusion (scattering), refraction, reflection, and/or absorption, compared to a case where no light attenuation part is provided.
  • the amount of light for example, light energy or luminous flux
  • the light is refracted by the recess 237 in a different direction than when the recess 237 is not present, thereby reducing the amount of light per unit area of the light emitted from the lens 230 and directed toward the vehicle body 20.
  • FIGS. 5 and 6 are cross section at a position corresponding to the cross section of the light emitting device 200 shown in FIG. 3.
  • the light emitted from the light source is indicated by a broken line arrow.
  • the direction in which light is emitted from the light source 220 shown in FIG. 3 is the same as the direction in which light is emitted from the light source shown in FIGS. 5 and 6.
  • FIG. 5 is a cross-sectional view showing the configuration of a light emitting device 200B according to Modification 1.
  • the light emitting device 200B includes a lens 230B having a different shape from the lens 230 included in the light emitting device 200.
  • the lens 230B includes a recess 238.
  • the light emitting device 200B includes a recess 238 as a first dimming section.
  • the recess 238 reduces at least a portion of the light emitted toward the vehicle body 20 out of the light emitted from the lens 230B.
  • the recess 238 is a recess provided in the first total reflection surface 235.
  • the recessed portion 238 is provided on the opposite side of the first total reflection surface 235 from the vehicle body 20 when viewed from the light source 220 (in other words, when viewed from the optical axis).
  • the lens 230B becomes a non-rotating body.
  • the size, groove depth, and shape of the recess 238 may be set arbitrarily so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
  • FIG. 6 is a sectional view showing the configuration of a light emitting device according to Modification Example 2.
  • the light emitting device 200C includes the same lens as the lens 230A included in the light emitting device 200A. Further, the light emitting device 200C includes a light transmitting cover 250A having a shape different from the light transmitting cover 250 included in the light emitting device 200.
  • the light-transmitting cover 250A includes an uneven portion 251.
  • the light emitting device 200C includes an uneven portion 251 as a first light attenuation portion.
  • the uneven portion 251 reduces at least a portion of the light emitted toward the vehicle body 20 out of the light emitted from the lens 230A.
  • the light-reducing section may be provided on the light-transmitting cover.
  • the light reduction portion that is, the uneven portion 251 may be provided at any position on the light-transmitting cover 250A.
  • the uneven portion 251 is provided on the vehicle body 20 side of the transparent cover 250A when viewed from the light source 220 (in other words, when viewed from the optical axis).
  • the uneven portion 251 is formed between a first surface 252 of the transparent cover 250A, into which the light emitted from the lens 230A is incident, and a second surface 253, through which the light is emitted from the transparent cover 250A. , provided on the first surface 252.
  • the uneven portion 251 is realized by two convex portions and a concave portion located between the two convex portions.
  • the number of convex portions and concave portions included in the concavo-convex portion 251 may be arbitrary.
  • the uneven portion may be realized by only one convex portion or only one concave portion.
  • the size, groove depth, shape, etc. of the uneven portion 251 may be arbitrarily set so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
  • the light emitting device may be provided with any combination of the above lens and the above transparent cover.
  • the light emitting device may include lens 230 or lens 230B and light-transmitting cover 250A.
  • the lens may also include recesses 237 and 238.
  • the lens includes a first light attenuating portion such as the recess 237 and/or 238, and the light-transmitting cover reduces the light emitted toward the vehicle body 20 out of the light emitted from the lens.
  • a second light attenuating portion such as an uneven portion 251 that reduces at least a portion of the light may be provided. That is, the uneven portion 251 may be an example of a first light reduction portion or a second light reduction portion.
  • the second light attenuating portion that is, the uneven portion 251 includes, for example, a first surface 252 of the light-transmitting cover 250A on which the light emitted from the lens 230 or 230B enters, and a first surface 252 on which the light emitted from the light-transmitting cover 250A enters. It is provided on the first surface 252 of the second surface 253.
  • the second light attenuation section (in this modified example, uneven section 251) is provided in the optical path of the light emitted from light source 220, which passes through first total reflection surface 235 when light-emitting device 200 does not have a second light attenuation section.
  • uneven section 251 is provided in the optical path of the light emitted from light source 220, which passes through first total reflection surface 235 when light-emitting device 200 does not have a second light attenuation section.
  • Invention 1 is a light-emitting device supported on a support alongside an imaging device 300 that detects light emitted by the light-emitting device, the light-emitting device comprising: a light source 220; (i) a lens having an entrance surface 231 into which light emitted by the light source 220 is incident and a bowl-shaped portion 233 that widens as it moves away from the light source 220; and (ii) an exit surface 232 from which light incident on the entrance surface 231 is emitted and a convex portion 234 that protrudes in a direction away from the light source 220, the convex portion 234 being convex on at least one side of the exit surface 232.
  • the bowl-shaped portion 233 has a first total reflection surface 235 that totally reflects the light incident on the entrance surface 231, and the bowl-shaped portion 233 has a second total reflection surface 236 that totally reflects the light incident on the entrance surface 231, and the light-emitting device is equipped with a first light-reducing portion that reduces at least a portion of the light that is emitted toward the support body that is located in a direction that intersects with the optical axis of the light emitted by the light source 220, out of the light that is incident on the lens.
  • the light emitting device is, for example, the light emitting device 200, 200B, or 200C.
  • the lens is, for example, 230, 230B, or 230C.
  • the support body is, for example, a vehicle 10. More specifically, the light emitting device 200 is mounted on the side of the first support by a door mirror 30, which is an example of a second support supported by a vehicle body 20 included in the vehicle 10, which is an example of a first support. It is supported (arranged) alongside 300.
  • the first light reduction section reduces at least a portion of the light directed toward the first support (for example, the vehicle body 20).
  • the first light reduction portion is, for example, the recesses 237 and 238 or the uneven portion 251.
  • the inventors of the present application found that when light emitted from a light emitting device that has been reflected once on the support portion enters the imaging device 300, halation occurs due to the influence of the light. Ta. Therefore, according to the light emitting device according to Invention 1, even if the light emitting device uses a lens including the first total reflection surface 235 and the second total reflection surface 236, halation in the image generated by the imaging device 300 will not occur. The occurrence of can be suppressed.
  • the support may be a telephone pole or the like.
  • the first support is a columnar member such as a telephone pole that supports the second support on the side of the first support
  • the second support is a support that supports the light source unit
  • the second support is a support for a telephone pole. It may also be a street light (lighting fixture) attached to a pole.
  • the first light attenuation section is provided in the optical path of light that passes through the first total reflection surface 235 when the light emitting device does not include the first light attenuation section among the light emitted from the light source 220. It is the light emitting device according to invention 1.
  • an imaging device 300 detects light emitted from a light emitting device using a lens including a first total reflection surface 235 that reflects a part of light from a light source 220 and directs it toward the vehicle 10.
  • the occurrence of halation is particularly effectively suppressed.
  • Invention 3 is the light emitting device according to Invention 1 or 2, wherein the first light attenuation section is provided on the entrance surface 231.
  • the light emitting device according to the third invention is, for example, the light emitting device 200.
  • the first light attenuation section can more reliably reduce the light, compared to, for example, the case where the light emitted from the lens is attenuated. It can be easily controlled.
  • a fourth invention is the light emitting device according to the third invention, wherein the first light attenuation portion is a recess 237 provided in the entrance surface 231.
  • the first light attenuation part can be easily formed.
  • the first light-reducing portion may have a structure formed by texturing, vapor deposition, two-color molding, insert molding, or laser irradiation. These structures may attenuate the light directed towards the support.
  • Invention 5 is the light emitting device according to Invention 1 or 2, wherein the first light attenuation portion is provided on the first total reflection surface 235.
  • the light emitting device according to the fifth aspect of the invention is, for example, light emitting device 200B.
  • the first light-attenuating section is provided directly on the first total reflection surface 235, making it easier to more reliably control the light that is incident on the first light-attenuating section.
  • a sixth invention is the light emitting device according to the fifth invention, wherein the first light attenuation portion is a recess 238 provided in the first total reflection surface 235.
  • the first light attenuation portion can be formed on the lens more easily than with texturing or the like.
  • Invention 7 is the light emitting device according to Invention 1 or 2, further comprising a transparent cover through which light emitted from the lens is transmitted.
  • the light emitting device according to the seventh invention is, for example, the light emitting device 200C
  • the transparent cover according to the seventh invention is, for example, the transparent cover 250 or 250A.
  • the lens can be protected from flying objects from the outside by the light-transmitting cover.
  • Invention 8 is the light-emitting device described in invention 7, in which the translucent cover includes a first light-reducing section that reduces at least a portion of the light emitted from the lens toward the support.
  • the light-transmitting cover according to the eighth aspect of the invention is light-transmitting cover 250A, and the first light-reducing portion according to the eighth aspect of the invention is uneven portion 251.
  • the lens provided in the light-emitting device may be lens 230A.
  • the lens is made as a rotating body around the optical axis of the lens, for example, the light directed toward the support can be attenuated by the light-transmitting cover. Therefore, the lens can be easily created and the light directed toward the support can be reduced.
  • Invention 9 is the light-emitting device according to invention 8, in which the first light-reducing section is provided on the first surface 252 of the translucent cover, where the light emitted from the lens is incident, and the second surface 253 where the light is emitted from the translucent cover.
  • the lens includes a first light attenuation section
  • the light-transmitting cover includes a second light attenuation section that reduces at least part of the light emitted toward the support body among the light emitted from the lens.
  • the lens according to the tenth invention is the lens 230 or the lens 230B
  • the first light reduction part according to the tenth invention is the concave part 237 or 238, and the second light reduction part according to the tenth invention is the uneven part 251.
  • each component of the light emitting device according to the present invention may be realized by arbitrary combinations.
  • the light attenuation portions are provided at a plurality of locations, the light directed toward the support can be more reliably attenuated.
  • the second light attenuating portion includes a first surface 252 of the light-transmitting cover into which the light emitted from the lens is incident, and a second surface 253 through which the light is emitted from the light-transmitting cover.
  • the light emitting device according to invention 10 is provided on the first surface 252.
  • Invention 12 is a light source unit comprising the light emitting device according to any one of Inventions 1 to 11 and an imaging device 300.
  • the light source unit is, for example, the light source unit 100 that includes a light emitting device 200 and an imaging device 300, but may also be a light source unit that includes a light emitting device 200B and an imaging device 300, or a light source unit that includes a light emitting device 200C and an imaging device. 300, and may be realized using the light emitting device according to the present invention.
  • Invention 13 is a vehicle comprising the light source unit according to Invention 12 and serving as a support.
  • the vehicle is, for example, a vehicle 10 that includes a light source unit 100.
  • the vehicle may be a vehicle that includes a light source unit that includes the light emitting device 200B and the imaging device 300, or may include a light source unit that includes the light emitting device 200C and the imaging device 300. Any vehicle may be used as long as it includes a light source unit having the light emitting device and the imaging device 300 according to the above.
  • Invention 14 allows the light emitting device and the imaging device 300 to be easily placed in the vehicle so that the same effects as the above light emitting device are exhibited.
  • an LED is exemplified as a solid-state light-emitting element included in the light source
  • a semiconductor light-emitting element such as a semiconductor laser
  • a solid-state light-emitting element such as an organic EL (Electro Luminescence) element or an inorganic EL element may be employed.
  • the light source may be realized as an LED module with an SMD (Surface Mount Device) structure, or may be an LED module with a so-called COB (Chip On Board) structure in which an LED chip is directly mounted on a substrate.
  • SMD Surface Mount Device
  • COB Chip On Board
  • the thickness of the lens is not particularly limited, but may be, for example, 0.5 mm or more at the thinnest part. This improves the moldability of the lens.
  • the light attenuation part (the first light attenuation part and/or the second light attenuation part) is not a concave part and/or an uneven part, but is formed by, for example, texturing, vapor deposition, two-color molding, insert molding, or laser irradiation. It may also be a structure formed by.
  • the light-reducing portion may be formed by applying texture to the lens and/or the light-transmitting cover, thereby forming irregularities on the surface of the lens and/or the light-transmitting cover.
  • the light attenuation section reduces light by diffusing (scattering) the light.
  • a thin film such as a metal film is formed as a light-reducing portion on the surface of the lens and/or the light-transmitting cover. may be formed.
  • the light attenuation section reduces light by absorbing or reflecting light.
  • a portion that absorbs, reflects, or diffuses light is formed on the surface and/or inside of the lens and/or the transparent cover.
  • a light attenuation portion may be formed.
  • the light attenuation section reduces light by absorbing, reflecting, or diffusing light.
  • the surface and/or inside of the lens and/or the transparent cover may be colored to form a portion that absorbs light.
  • a light reduction portion may be formed.
  • the light attenuation section reduces light by absorbing light.
  • the light-attenuating portion may be formed by, for example, irradiating the lens and/or the light-transmitting cover with a laser to roughen the surface of the lens and/or the light-transmitting cover. Thereby, the light attenuation section reduces the light by scattering the light.
  • the light attenuation section may be realized by any combination of these configurations.
  • the light emitting device only needs to be able to irradiate light onto the road surface around the vehicle, and may be placed on a door mirror or on the outer surface of the vehicle body, such as an overhang surface.
  • the overhang surface is, for example, a lower portion of the vehicle body, and is a surface inclined with respect to the vertical direction.
  • the arrangement of the imaging device is also similar to that of the light emitting device.
  • the light source unit may include one imaging device or may include multiple imaging devices.
  • each component of the processing unit included in the control device that controls the light emitting device and the imaging device may be configured with hardware such as a dedicated circuit, or may be configured with a software program suitable for each component. It may be realized by Each component may be realized by a program execution unit such as a CPU (Central Processing Unit) or a processor reading and executing a software program recorded on a non-transitory recording medium such as a hard disk or semiconductor memory. .
  • a program execution unit such as a CPU (Central Processing Unit) or a processor reading and executing a software program recorded on a non-transitory recording medium such as a hard disk or semiconductor memory.
  • the present invention also includes forms obtained by applying various modifications to each embodiment and modification that a person skilled in the art would conceive, or forms realized by arbitrarily combining the components and functions of each embodiment and modification within the scope that does not deviate from the spirit of the present invention.
  • Vehicle 20 Vehicle body 30 Door mirror 100
  • Light source unit 200, 200A, 200B, 200C Light emitting device 220
  • Light source 230, 230A, 230B Lens 231 Incident surface 232
  • Output surface 233 Bowl-shaped portion 234 Convex portion 235
  • First total reflection surface 236 Second total reflection Surfaces 237, 238

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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

L'invention concerne un dispositif électroluminescent (200) comprenant une source de lumière (220) et une lentille (230) ayant : (i) une partie en forme de bol (233) ayant une surface incidente (231) sur laquelle la lumière émise par la source de lumière (220) est incidente et s'élargissant à mesure que la distance augmente à partir de la source de lumière (220) ; et (ii) une partie en saillie (234) ayant une surface de sortie (232) à partir de laquelle la lumière incidente sur la surface incidente (231) sort et fait saillie dans une direction s'éloignant de la source de lumière (220). La partie en saillie (234) a une première surface de réflexion totale (235) réfléchissant totalement la lumière incidente sur la surface incidente (231). La partie en forme de bol (233) a une seconde surface de réflexion totale (236) réfléchissant totalement la lumière incidente sur la surface incidente (231). Le dispositif électroluminescent (200) comprend une première partie de réduction de lumière qui réduit, parmi la lumière incidente sur la lentille (230), au moins une partie de la lumière émise vers un corps de support positionné dans une direction croisant l'axe optique de la lumière émise par la source de lumière (220).
PCT/JP2023/032262 2022-09-22 2023-09-04 Dispositif électroluminescent, unité de source de lumière et véhicule WO2024062910A1 (fr)

Applications Claiming Priority (2)

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JP2022-151183 2022-09-22
JP2022151183A JP2024046041A (ja) 2022-09-22 2022-09-22 発光装置、光源ユニット、および、車両

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WO2024062910A1 true WO2024062910A1 (fr) 2024-03-28

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020019303A (ja) * 2018-07-30 2020-02-06 パナソニックＩｐマネジメント株式会社 光源ユニット及び車両
JP2021017228A (ja) * 2019-07-20 2021-02-15 株式会社小糸製作所 車両用照明装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020019303A (ja) * 2018-07-30 2020-02-06 パナソニックＩｐマネジメント株式会社 光源ユニット及び車両
JP2021017228A (ja) * 2019-07-20 2021-02-15 株式会社小糸製作所 車両用照明装置

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