WO2023090426A1 - Personnel lamp and vehicle lamp - Google Patents

Personnel lamp and vehicle lamp Download PDF

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Publication number
WO2023090426A1
WO2023090426A1 PCT/JP2022/042872 JP2022042872W WO2023090426A1 WO 2023090426 A1 WO2023090426 A1 WO 2023090426A1 JP 2022042872 W JP2022042872 W JP 2022042872W WO 2023090426 A1 WO2023090426 A1 WO 2023090426A1
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WIPO (PCT)
Prior art keywords
lamp
light
vehicle
light source
interpersonal
Prior art date
Application number
PCT/JP2022/042872
Other languages
French (fr)
Japanese (ja)
Inventor
裕一 柴田
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株式会社小糸製作所
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Publication of WO2023090426A1 publication Critical patent/WO2023090426A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/24—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments for lighting other areas than only the way ahead
    • 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
    • F21S41/125—Coloured light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/35—Brake lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/60—Projection of signs from lighting devices, e.g. symbols or information being projected onto the road

Definitions

  • the present disclosure relates to an interpersonal lamp.
  • the present disclosure also relates to vehicular lamps.
  • Patent Document 1 A vehicle lamp described in Patent Document 1 is known.
  • the purpose of the vehicle lamp disclosed in Patent Document 1 is to irradiate pedestrians on the road with light to call attention to them.
  • Such vehicle lamps can notify pedestrians of the presence of the vehicle by illuminating the road surface or the like in front of the vehicle, for example.
  • An object of the present disclosure is to provide a pedestrian lamp and a vehicle lamp that support smooth traffic.
  • An interpersonal lamp includes: At a distance of 3 m from the light source, light of a color represented by y ⁇ 0.26x+0.1829 in the xy chromaticity diagram is irradiated.
  • the light in the region represented by the xy chromaticity region y ⁇ 0.26x+0.1829 is mixed red and blue light.
  • Red light has a high spectral reflectance with respect to human skin. Therefore, when pedestrians around the vehicle are irradiated with light of colors including red, the light reflected from the pedestrians becomes stronger.
  • mixing red light with blue light makes it easier for the human eye to distinguish between objects.
  • the anti-personnel lamp having the above configuration irradiates light that has a high reflection intensity from pedestrians around the vehicle and that makes it easy for pedestrians to be identified. Therefore, it is possible to reduce the glare given to the pedestrian by suppressing the intensity of the light irradiated to the pedestrian. For this reason, the pedestrian lamp having the above configuration can assist smooth traffic.
  • FIG. 1 illustrates how a vehicle lamp and an interpersonal lamp according to the present embodiment irradiate light.
  • FIG. 2 is an xy chromaticity diagram for explaining the color of light emitted by the personal lamp.
  • FIG. 3 is a view of a vehicle headlamp and a road surface drawing lamp mounted on the vehicle irradiating light, as viewed from the right side of the vehicle.
  • FIG. 4 is a view of the light emitted from the personal lamp according to the present embodiment, as viewed from the right side of the vehicle.
  • FIG. 5 is a view of the light emitted from the interpersonal lamp according to the present embodiment, as viewed from the right side of the vehicle.
  • FIG. 6 is a block configuration diagram showing the relationship between the personal lamp and its peripheral devices according to the present embodiment.
  • FIG. 7 illustrates an example of an optical system of an interpersonal lamp according to this embodiment.
  • FIG. 8 illustrates a modification in which one light source emits mixed red and blue light.
  • FIG. 9 illustrates another example of an optical system in the case where a vehicle tail lamp or a vehicle brake lamp is provided with an interpersonal lamp.
  • FIG. 10 illustrates the experimental results of Experiment 1.
  • FIG. 11 illustrates the experimental results of Experiment 2.
  • FIG. 12 illustrates the experimental results of Experiment 3.
  • the terms “left-right direction”, “front-rear direction”, and “vertical direction” will be referred to as appropriate.
  • the “vertical direction” is a direction including the “upward direction” and the “downward direction”.
  • “Fore-and-aft direction” is a direction that includes “forward direction” and “rearward direction.”
  • a “left-right direction” is a direction including a "left direction” and a “right direction.”
  • Reference numeral U shown in the drawings described below indicates an upward direction.
  • Symbol D indicates the downward direction.
  • Symbol F indicates the forward direction.
  • Symbol B indicates the rearward direction.
  • Symbol L indicates the left direction.
  • the symbol R indicates the right direction.
  • FIG. 1 illustrates how a vehicle lamp 10 and an interpersonal lamp 20 according to the present embodiment irradiate light.
  • the vehicle lamp 10 in this embodiment is a general term for lamps including vehicle head lamps, vehicle rear combination lamps, vehicle tail lamps, vehicle brake lamps, and the like.
  • a vehicle lamp 10 (so-called vehicle headlamp) provided in front of the vehicle 100 includes a headlight lamp that emits low beam and high beam, a road drawing lamp, and an interpersonal lamp 20 .
  • Vehicle lamps 10 (so-called vehicle rear combination lamps) provided behind the vehicle 100 include a vehicle tail lamp capable of emitting red light to the rear vehicle, a vehicle brake lamp, a road drawing lamp, and an interpersonal lamp 20. Prepare.
  • the vehicle lamps 10 according to this embodiment are provided on the left side and the right side of the vehicle 100, respectively.
  • personal lamps 20 are provided on both sides of the vehicle 100, respectively. Therefore, the interpersonal lamp 20 provided on the left side of the vehicle 100 is sometimes called the left interpersonal lamp 20L, and the interpersonal lamp 20 provided on the right side of the vehicle 100 is sometimes called the right interpersonal lamp 20R.
  • the road surface drawing lamp is a lamp that irradiates the road surface with a road surface drawing pattern P indicating the own vehicle information and the like in order to notify the pedestrian 1 and the like of the presence of the vehicle 100 .
  • the interpersonal lamp 20 is a lamp that directly irradiates the pedestrian 1 and the like with light. A user who operates the vehicle 100 can recognize the existence of the pedestrian 1 or the like by seeing the light emitted by the interpersonal lamp 20 and reflected by the pedestrian 1 or the like.
  • the term "pedestrian” does not necessarily represent only a person who is walking.
  • a “pedestrian” can represent any person on the road, for example, a person just standing on the road or a person riding a light vehicle such as a bicycle.
  • FIG. 2 is an xy chromaticity diagram for explaining the color of light emitted by the personal lamp 20.
  • point A indicates 485 nm single-wavelength light
  • point B indicates 605 nm single-wavelength light.
  • the light emitted by the interpersonal lamp 20 is colored. More specifically, it is a mixed color of red and blue, and if the observation point is 3 m from the light source, the region below the broken line in the xy chromaticity diagram shown in FIG. It is a color that satisfies .1829. As will be described later, even if the pedestrian 1 or the like is directly irradiated with light of such a color, glare is unlikely to occur for the pedestrian 1 or the like, and it is easy for the user to visually recognize the light.
  • the light emitted by the personal lamp 20 according to the present embodiment is represented by the xy chromaticity region y ⁇ 0.26x+0.1829.
  • Red light has a high spectral reflectance with respect to human skin. Therefore, when the pedestrian 1 around the vehicle 100 is irradiated with light of a color including red, the light reflected from the pedestrian 1 becomes stronger.
  • mixing red light with blue light makes it easier for the human eye to distinguish between objects. Therefore, the vehicle lamp 10 emits light that has a high reflection intensity from the pedestrians 1 around the vehicle 100 and that makes it easy to identify objects. For this reason, the intensity of the light that irradiates the pedestrian 1 can be suppressed, and the glare given to the pedestrian 1 can be reduced. For this reason, the pedestrian lamp 20 configured as described above can assist smooth traffic.
  • the vehicle lamp 10 includes a road surface drawing lamp and an interpersonal lamp 20 .
  • the pedestrian 1 or the like is notified of the presence of the vehicle 100 by the road drawing lamp irradiating the road drawing pattern P, and the user can easily find the pedestrian 1 or the like by irradiating the light of the interpersonal lamp 20. ⁇ It is possible to provide a vehicular lamp 10 that simultaneously performs the above.
  • the saturation of the color of the light emitted from the personal lamp 20 according to the present embodiment is higher than a certain level.
  • a certain level it is known that when the photopic luminance L (cd/m 2 ) is made equal and a chromatic color and an achromatic color are compared, the chromatic color appears brighter.
  • the luminance that can actually be seen is assumed to be the equivalent luminance L eq (cd/m 2 ).
  • the following equation holds for the relationship between the photopic luminance L and the equivalent luminance L eq .
  • the color of the light emitted from the personal lamp 20 is f(x, y)>1.2. desirable.
  • Such an interpersonal lamp 20 looks brighter than the actual brightness by more than 1.2 times, so that visibility for the user is improved. Since the illuminance of the interpersonal lamp 20 necessary for the user's visual recognition can be reduced, the interpersonal lamp 20 is provided in which glare is less likely to occur even if the pedestrian 1 or the like is directly illuminated.
  • FIG. 3 is a view of the vehicle headlamps and road surface drawing lamps mounted on the vehicle 100 irradiating light, viewed from the right side of the vehicle 100.
  • FIG. FIG. 4 is a diagram showing how the interpersonal lamp 20 according to the present embodiment irradiates light, as viewed from the right side of the vehicle 100.
  • a place 3 m away from the light source is an observer point where an observer (an example of a pedestrian 1 or the like) stands.
  • a place 5 m away from the light source is a luminous intensity observation point for measuring luminous intensity.
  • the luminous intensity of the personal lamp 20 is preferably 13 cd or less. At this time, the illuminance at the luminous intensity observation point is 0.52 lx or less. In general, the luminous intensity of vehicle headlamps is 1000 cd or more. At this time, the illuminance at the luminous intensity observation point is 40 lx or more.
  • the luminous intensity of the interpersonal lamp 20 is smaller than the luminous intensity of the vehicle headlamp, the illuminance to the pedestrian 1 is also reduced. As a result, glare is less likely to occur, particularly for the pedestrian 1 near the vehicle 100 .
  • Pedestrians wear clothes of various colors, and it is difficult to select a wavelength of light that makes it easy to distinguish the colors.
  • Pedestrian skin tones generally have a limited range of colors ranging from light orange to brown. For this reason, the present inventor considered irradiating the pedestrian 1 with light having a wavelength that is likely to be reflected on the skin. In addition, the inventor considered irradiating light on the face, which has a large exposed area of the pedestrian's skin. For this reason, it is preferable that the luminous intensity of the personal lamp 20 is set to 13 cd or less so as not to dazzle the pedestrian 1 .
  • both the upper limit LB1 and the lower limit LB2 of the light emitted from the vehicle headlamp are 1 m or less at the observer's point. This is because the light from the vehicle headlamp can cause glare to pedestrians 1 etc. if the observer is not far enough away from the light source of the vehicle headlamp. This is to prevent the face of the pedestrian 1 or the like from being directly irradiated with the light from the light as much as possible. However, only the legs and torso of the pedestrian 1 and the like are revealed by the illumination of the vehicle headlamps. For this reason, it may be difficult for the user to determine whether the object seen by the illumination of the vehicle headlamp is a person, an object, or a pattern on the road surface.
  • the road surface drawing lamp is a lamp that draws the road surface drawing pattern P on the foot of the pedestrian 1 and on the road surface in front of the vehicle 100 . Therefore, both the upper limit RD1 and the lower limit RD2 of the light emitted from the road drawing lamp are less than 1 m at the observer's point.
  • the upper limit P1 and the lower limit P2 of the light emitted from the human lamp 20 according to the present embodiment are 1 m or more.
  • the face of the pedestrian 1 or the like is likely to be directly irradiated with the light of the interpersonal lamp 20 .
  • the color of the light from the human lamp 20 is particularly easily recognizable when reflected by human skin. Therefore, by setting the lower limit of the light emitted from the interpersonal lamp 20 to 1 m or more, the user can easily find the presence of the pedestrian 1 or the like more accurately.
  • FIG. 5 is a diagram showing how the interpersonal lamp 20 according to the present embodiment irradiates light, as viewed from the right side of the vehicle 100.
  • the angle formed by the left limit PL1 of the light emitted from the left lamp 20L and the right limit PL2 of the light emitted from the left lamp 20L is It is wider than the angle between the upper limit P1 of the light emitted and the lower limit P2 of the light emitted from the interpersonal lamp 20 .
  • the angle between the left limit PR1 of the light emitted from the right personal use lamp 20R and the right limit PR2 of the light emitted from the right personal use lamp 20R is the upper limit P1 of the light emitted from the right personal use lamp 20R. and the lower limit P2 of the light emitted from the lamp 20 for personal use.
  • FIG. 6 is a block configuration diagram showing the relationship between the interpersonal lamp 20 and its peripheral devices according to this embodiment.
  • the pedestrian lamp 20 may have a sensor 21 for detecting the presence of the pedestrian 1 or the like.
  • the sensor 21 may detect the pedestrian 1 or the like using, for example, a CMOS camera, an infrared camera, LiDAR, or the like.
  • the interpersonal lamp 20 may be configured to be directed toward the detected pedestrian 1 when the sensor 21 detects the pedestrian 1 or the like. For example, when the pedestrian 1 is detected by the sensor 21 , the information is sent to the receiver 22 of the pedestrian lamp 20 . Based on the information sent to the receiving unit 22, the control unit 23 determines in which direction the interpersonal lamp 20 should be oriented, and changes the orientation of the interpersonal lamp 20 by controlling a driving unit (not shown). . Further, the control unit 23 controls the lighting of the first light source 24 and the second light source 25, which will be described later, so that the interpersonal lamp 20 irradiates light toward the pedestrian 1 and the like.
  • the interpersonal lamp 20 can more accurately illuminate the pedestrian 1 and the like, so that it can help the user to find the pedestrian 1 and the like.
  • the interpersonal lamp 20 may be communicably connected to a vehicle control unit 30 capable of acquiring and communicating specific information about the vehicle 100 .
  • the vehicle control unit 30 acquires, for example, information indicating that the vehicle 100 has been put into the “drive gear” when the vehicle 100 is in a stopped state, and transmits this to the reception unit 22 .
  • the control unit 23 controls the first light source 24 and the second light source 25 of the interpersonal lamp 20 in front of the vehicle 100 to turn on the first light source 24 and the second light source 25. emit light from
  • the pedestrian lamp 20 can assist the user in recognizing whether or not there is a pedestrian 1 in front of the vehicle 100 when the vehicle 100 starts forward.
  • the vehicle control unit 30 acquires information that the vehicle 100 has been put into "reverse gear" when the vehicle 100 is in a stopped state, and transmits this to the receiving unit 22. Based on the information received by the receiving unit 22, the control unit 23 controls the first light source 24 and the second light source 25 of the interpersonal lamp 20 behind the vehicle 100 to turn on the first light source 24 and the second light source 25. emit light from Thus, the pedestrian lamp 20 can assist the user in recognizing whether or not the pedestrian 1 is behind the vehicle 100 when the vehicle 100 starts backward.
  • the control unit 23 controls light irradiation by the interpersonal lamp 20.
  • the pedestrian lamp 20 can assist the user in finding the pedestrian 1 or the like in at least one of the front and rear of the vehicle 100 when the vehicle 100 starts moving, for example.
  • FIG. 7 illustrates an example of the optical system of the personal lamp 20 according to this embodiment.
  • the personal lamp 20 includes a first light source 24, a second light source 25, and an optical member.
  • the first light source 24 is a light source that emits red light.
  • the wavelength range of the light emitted by the first light source 24 is 605 nm or more and 830 nm or less.
  • the second light source 25 is a light source that emits blue light, and the wavelength range of the light emitted by the second light source 25 is 380 nm or more and 485 nm or less.
  • the optical member is a member that combines the light emitted by the first light source 24 and the light emitted by the second light source 25 .
  • the optical member is a diffuser plate 26 having numerous irregularities on one side.
  • the optical member is not limited to the diffusion plate 26, and any member may be used as long as the light emitted from the first light source 24 and the light emitted from the second light source 25 can be combined.
  • the reflector reflects the light emitted from the first light source 24 and the second light source 25 so that the optical paths of the light emitted from the first light source 24 and the second light source 25 are parallel and enter the diffusion plate 26. It is a member.
  • the parallel light incident on the diffuser plate 26 travels through the diffuser plate 26 while being refracted by the uneven portions of the diffuser plate 26 .
  • On the surface of the diffuser plate 26 some of the light is emitted outside the diffuser plate 26 while some of the light is reflected and still travels inside the diffuser plate 26 .
  • the light emitted from the diffuser plate 26 is diffused and propagated, and the lights emitted by the first light source 24 and the second light source 25 are combined inside.
  • the light combined inside the diffuser plate 26 is emitted as a mixed color light of red and blue.
  • FIG. 8 is a diagram showing how one light source 24A emits mixed-color light of red and blue as a modification.
  • the light source 24A has a light source chip 241 that emits red light and a light emitting layer 242 that covers the light source chip 241 .
  • the light-emitting layer 242 has therein a phosphor 242a that emits blue light when exposed to light.
  • a single light source chip 241 can emit light of a specific color, so that a space-saving human lamp can be realized.
  • the light source may be configured such that the light source chip emits blue light, and the light emitting layer includes a phosphor that emits red light when exposed to light. Also, the phosphor is not necessarily required. If the light source chip can directly emit a specific color corresponding to a mixture of red and blue, the phosphor may not be provided.
  • the interpersonal lamp 20 configured as shown in FIG. 7 is particularly preferably provided inside a vehicle tail lamp or a vehicle brake lamp.
  • a vehicle tail lamp and a vehicle brake lamp are examples of the vehicle lamp 10 .
  • a vehicle tail lamp or a vehicle brake lamp may be configured to include the interpersonal lamp 20 therein.
  • the first light source 24 is desirably configured so as to be used as a red light for a vehicle tail lamp or a vehicle brake lamp and also as a red light for the interpersonal lamp 20 .
  • the human lamp 20 is also configured as a red light for a vehicle tail lamp or a vehicle brake lamp, and is also configured to irradiate mixed colors of red and blue.
  • the interpersonal lamp 20 may be provided inside the vehicle tail lamp or the vehicle brake lamp, so that the interpersonal lamp 20 can be mounted in a space-saving manner. Further, since the interpersonal lamp 20 is provided inside the vehicle tail lamp or the vehicle brake lamp, the interpersonal lamp 20 can be mounted without impairing its design.
  • the interpersonal lamp 20 When the interpersonal lamp 20 is used as a red light for a vehicle tail lamp or a vehicle brake lamp, the first light source 24 is turned on and the second light source 25 is turned off. Conversely, the personal lamp 20 turns on the first light source 24 and the second light source 25 when irradiating mixed colors of red and blue.
  • the interpersonal lamp 20 can emit red light by turning on the first light source 24 and turning off the second light source 25 .
  • the human lamp 20 can irradiate a mixed color light of red and blue by turning on the first light source 24 and the second light source 25 . In this manner, switching between the function as the vehicle tail lamp or the vehicle brake lamp and the function as the interpersonal lamp 20 can be realized with a simple configuration.
  • FIG. 9 is a diagram showing another example of an optical system in the case where a vehicle tail lamp or a vehicle brake lamp is provided with the interpersonal lamp 20.
  • FIG. It should be noted that the illustration of the uneven portions of the reflector and the diffuser plate 26A is omitted. Also, in FIG. 9, the dashed lines schematically indicate which light source illuminates which part of the optical member, and do not indicate the optical path of the light from the light source.
  • the diffuser plate 26A has a combining portion 261 into which both the light from the first light source 24 and the light from the second light source 25 enter, and the non-combining portion 262 into which only the light from the first light source 24 enters.
  • a shielding portion 263 is provided at the boundary between the multiplexing portion 261 and the non-multiplexing portion 262 . The shielding portion 263 is configured so that the light incident on the multiplexing portion 261 and the light incident on the non-multiplexing portion 262 are not mixed.
  • the interpersonal lamp 20 configured as described above can irradiate only red light and mixed red and blue light at the same time. Thereby, the function as a vehicle tail lamp or a vehicle brake lamp and the function as an interpersonal lamp 20 can be compatible.
  • Example 1 The spectral reflectance was examined when light of each wavelength was applied to human skin, and the results were tabulated. The results of Experiment 1 are shown in FIG. As shown in FIG. 10, the spectral reflectance is high when the skin is irradiated with light in a wavelength range exceeding 600 nm. From this result, it was confirmed that red light has excellent spectral reflectance for human skin.
  • Example 2 A sensory evaluation was conducted in which visibility was evaluated on a three-grade scale when red, green, blue, and a mixture of these colors were applied to the face.
  • red may be referred to as R.
  • Green is sometimes called G.
  • Blue is sometimes called B.
  • a mixed color of red and green is sometimes called RG.
  • a mixed color of red and blue is sometimes called RB.
  • a mixed color of green and blue is sometimes called GB.
  • Mixed colors of red, green, and blue are sometimes called RGB.
  • Fig. 11 shows the results of the sensory evaluation. It was shown that the R light, which was confirmed to have good spectral reflectance in Experiment 1, does not necessarily have good visibility. It was also shown that RB light has the best visibility.
  • Example 3 In Experiment 2, a comparison was made between the visible distances of RB light and white light, which had the best visibility.
  • Point C indicates RB light.
  • point C satisfies y ⁇ 0.26x+0.1829.
  • Point D indicates white light.
  • Point D is a point that exists inside region W shown in FIG. Region W is the white region of the headlamp as defined in UN regulations governing the construction and installation of motor vehicles.
  • the light of the color represented by the two points C and D described above was illuminated on a person's face 3m away from the light source. At this time, it was investigated whether a person's face could be visually recognized no matter how many meters away it was.
  • the light intensities of the illuminating light sources are 10 cd and 20 cd.
  • the experimental results are shown in FIG. As shown in FIG. 12, the visible distance is longer when the face is irradiated with RB light than when the face is irradiated with white light. Regardless of whether the luminous intensity is 10 cd or 20 cd, the visible distance for RB light is longer than the visible distance for white light by 10 m or more. From this, it was confirmed that RB light is more visible than white light.
  • any known means may be used for the method of causing the first light source and the second light source to enter the optical member.
  • collimating lenses may be used instead of using reflectors.
  • An anti-personnel lamp that emits light of a color represented by y ⁇ 0.26x+0.1829 in the xy chromaticity diagram at a distance of 3 m from the light source.
  • the light emitted from the personal lamp satisfies the following formula in the xy chromaticity diagram, (1) The interpersonal lamp described in (1).
  • the lamp luminous intensity is 13 cd or less, An interpersonal lamp according to (1) or (2).
  • An antipersonnel lamp according to any one of (1) to (4).
  • (6) a first light source that emits red light; a second light source that emits blue light; an optical member for combining the light from the first light source and the light from the second light source;
  • the personal lamp according to any one of (1) to (5).
  • (7) Equipped with a road surface drawing lamp and an interpersonal lamp according to any one of (1) to (6), vehicle lamp.
  • (8) Equipped with an interpersonal lamp according to (6), Vehicle tail lights or vehicle brake lights.
  • the optical member has a combining portion into which light from the second light source can enter and a non-combining portion into which light from the second light source does not enter, The vehicle tail lamp or vehicle brake lamp according to (9).

Abstract

This personnel lamp emits light of a color represented by y≤0.26x+0.1829 in an xy chromaticity diagram at 3 m from a light source.

Description

対人用ランプおよび車両用ランプPersonnel lamps and vehicle lamps
　本開示は、対人用ランプに関する。また、本開示は、車両用ランプにも関する。 The present disclosure relates to an interpersonal lamp. The present disclosure also relates to vehicular lamps.
　特許文献１に記載の車両用ランプが知られている。 A vehicle lamp described in Patent Document 1 is known.
日本国特開２０２０－０５５３７４号公報Japanese Patent Application Laid-Open No. 2020-055374
　特許文献１が開示する車両用ランプは、路上の歩行者等に光を照射し注意を喚起することを目的としている。このような車両用ランプは、例えば車両前方の路面等に光を照射して、歩行者に車両の存在を知らしめることができる。 The purpose of the vehicle lamp disclosed in Patent Document 1 is to irradiate pedestrians on the road with light to call attention to them. Such vehicle lamps can notify pedestrians of the presence of the vehicle by illuminating the road surface or the like in front of the vehicle, for example.
　ところで、特許文献１のように、歩行者に注意喚起を促しても、必ずしも運転者等のユーザの意図通りに歩行者が行動するとは限らない。このとき、車両の発進等を安全に行えるか否か、等の判断は、運転者等のユーザの認知と判断による。このため、ユーザが歩行者等を見つけやすくするために、ランプが歩行者等に光を照射することが考えられる。 By the way, even if a pedestrian is alerted as in Patent Document 1, the pedestrian does not always behave as intended by the user such as the driver. At this time, the judgment as to whether or not the vehicle can be safely started depends on the recognition and judgment of the user such as the driver. Therefore, in order to make it easier for the user to find pedestrians and the like, it is conceivable that lamps irradiate pedestrians and the like with light.
　本開示は、円滑な交通を支援する対人用ランプおよび車両用ランプを提供することを目的とする。 An object of the present disclosure is to provide a pedestrian lamp and a vehicle lamp that support smooth traffic.
　本開示の一側面に係る対人用ランプは、
　光源から３ｍ先において、ｘｙ色度図におけるｙ≦０．２６ｘ＋０．１８２９で表される色の光を照射する。 An interpersonal lamp according to one aspect of the present disclosure includes:
At a distance of 3 m from the light source, light of a color represented by y≦0.26x+0.1829 in the xy chromaticity diagram is irradiated.
　ｘｙ色度図から明らかなように、ｘｙ色度でｙ≦０．２６ｘ＋０．１８２９の領域で表される領域の光は、赤と青の混色の光である。赤色の光は、人の肌に対して分光反射率が高い。このため、赤を含む色の光が車両の周囲の歩行者に照射されると、歩行者から反射される光が強くなる。また、実験により、赤色の光に青色の光を混ぜると、人の目によって物体を判別しやすくなることが確認された。
　上記構成の対人用ランプは車両周囲の歩行者からの反射強度が高く、かつ、歩行者が判別されやすい光を照射する。このため、歩行者に照射する光の強度を抑えて歩行者に与えるグレアを低減できる。このような理由により、上記構成の対人用ランプは円滑な交通を支援することができる。 As is clear from the xy chromaticity diagram, the light in the region represented by the xy chromaticity region y≦0.26x+0.1829 is mixed red and blue light. Red light has a high spectral reflectance with respect to human skin. Therefore, when pedestrians around the vehicle are irradiated with light of colors including red, the light reflected from the pedestrians becomes stronger. Experiments have also confirmed that mixing red light with blue light makes it easier for the human eye to distinguish between objects.
The anti-personnel lamp having the above configuration irradiates light that has a high reflection intensity from pedestrians around the vehicle and that makes it easy for pedestrians to be identified. Therefore, it is possible to reduce the glare given to the pedestrian by suppressing the intensity of the light irradiated to the pedestrian. For this reason, the pedestrian lamp having the above configuration can assist smooth traffic.
　本開示によれば、円滑な交通を支援する対人用ランプおよび車両用ランプを提供できる。 According to the present disclosure, it is possible to provide an interpersonal lamp and a vehicle lamp that support smooth traffic.
図１は、本実施形態に係る車両用ランプおよび対人用ランプが光を照射する様子を例示する。FIG. 1 illustrates how a vehicle lamp and an interpersonal lamp according to the present embodiment irradiate light. 図２は、対人用ランプが照射する光の色を説明するためのｘｙ色度図である。FIG. 2 is an xy chromaticity diagram for explaining the color of light emitted by the personal lamp. 図３は、車両に搭載される車両用ヘッドランプおよび路面描画ランプが光を照射する様子を車両の右側面から見た図である。FIG. 3 is a view of a vehicle headlamp and a road surface drawing lamp mounted on the vehicle irradiating light, as viewed from the right side of the vehicle. 図４は、本実施形態に係る対人用ランプが光を照射する様子を車両の右側面から見た図である。FIG. 4 is a view of the light emitted from the personal lamp according to the present embodiment, as viewed from the right side of the vehicle. 図５は、本実施形態に係る対人用ランプが光を照射する様子を車両の右側面から見た図である。FIG. 5 is a view of the light emitted from the interpersonal lamp according to the present embodiment, as viewed from the right side of the vehicle. 図６は、本実施形態に係る対人用ランプとその周辺機器との関係を示すブロック構成図である。FIG. 6 is a block configuration diagram showing the relationship between the personal lamp and its peripheral devices according to the present embodiment. 図７は、本実施形態に係る対人用ランプの光学系の一例を例示する。FIG. 7 illustrates an example of an optical system of an interpersonal lamp according to this embodiment. 図８は、変形例として一つの光源が赤色と青色との混色の光を出射する様子を例示する。FIG. 8 illustrates a modification in which one light source emits mixed red and blue light. 図９は、車両用テールランプあるいは車両用ブレーキランプが対人用ランプを備える場合の光学系の別例を例示する。FIG. 9 illustrates another example of an optical system in the case where a vehicle tail lamp or a vehicle brake lamp is provided with an interpersonal lamp. 図１０は、実験１の実験結果を例示する。FIG. 10 illustrates the experimental results of Experiment 1. FIG. 図１１は、実験２の実験結果を例示する。FIG. 11 illustrates the experimental results of Experiment 2. 図１２は、実験３の実験結果を例示する。FIG. 12 illustrates the experimental results of Experiment 3.
　以下、本開示の実施形態について図面を参照しながら説明する。尚、実施形態の説明において既に説明された部材と同一の参照番号を有する部材については、説明の便宜上、その説明は省略する。また、本図面に示された各部材の寸法は、説明の便宜上、実際の各部材の寸法とは異なる場合がある。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. For the sake of convenience, descriptions of members having the same reference numbers as members already described in the description of the embodiment will be omitted. Also, the dimensions of each member shown in this drawing may differ from the actual dimensions of each member for convenience of explanation.
　また、本実施形態の説明では、説明の便宜上、「左右方向」、「前後方向」、「上下方向」について適宜言及する。ここで、「上下方向」は、「上方向」及び「下方向」を含む方向である。「前後方向」は、「前方向」及び「後方向」を含む方向である。「左右方向」は、「左方向」及び「右方向」を含む方向である。以降に説明する図中に示した符号Ｕは上方向を示す。符号Ｄは下方向を示す。符号Ｆは前方向を示す。符号Ｂは後方向を示す。符号Ｌは左方向を示す。符号Ｒは右方向を示す。これらの方向は、車両に搭乗した運転手から見た方向に相当する。 Also, in the description of the present embodiment, for convenience of description, the terms "left-right direction", "front-rear direction", and "vertical direction" will be referred to as appropriate. Here, the "vertical direction" is a direction including the "upward direction" and the "downward direction". "Fore-and-aft direction" is a direction that includes "forward direction" and "rearward direction." A "left-right direction" is a direction including a "left direction" and a "right direction." Reference numeral U shown in the drawings described below indicates an upward direction. Symbol D indicates the downward direction. Symbol F indicates the forward direction. Symbol B indicates the rearward direction. Symbol L indicates the left direction. The symbol R indicates the right direction. These directions correspond to the directions seen by the driver in the vehicle.
　図１を参照して、車両１００に設けられる本実施形態に係る車両用ランプ１０及び対人用ランプ２０について以下に説明する。図１は、本実施形態に係る車両用ランプ１０および対人用ランプ２０が光を照射する様子を例示する。本実施形態における車両用ランプ１０は、車両用ヘッドランプ、車両用リアコンビネーションランプ、車両用テールランプ、および、車両用ブレーキランプ等を含むランプの総称である。 A vehicle lamp 10 and an interpersonal lamp 20 according to the present embodiment provided in a vehicle 100 will be described below with reference to FIG. FIG. 1 illustrates how a vehicle lamp 10 and an interpersonal lamp 20 according to the present embodiment irradiate light. The vehicle lamp 10 in this embodiment is a general term for lamps including vehicle head lamps, vehicle rear combination lamps, vehicle tail lamps, vehicle brake lamps, and the like.
　車両１００の前方に設けられる車両用ランプ１０（いわゆる車両用ヘッドランプ）は、ロービームおよびハイビームを照射する前照用ランプと、路面描画ランプと、対人用ランプ２０とを備える。車両１００の後方に設けられる車両用ランプ１０（いわゆる車両用リアコンビネーションランプ）は、後方車に赤色光を出射できる車両用テールランプと、車両用ブレーキランプと、路面描画ランプと、対人用ランプ２０とを備える。 A vehicle lamp 10 (so-called vehicle headlamp) provided in front of the vehicle 100 includes a headlight lamp that emits low beam and high beam, a road drawing lamp, and an interpersonal lamp 20 . Vehicle lamps 10 (so-called vehicle rear combination lamps) provided behind the vehicle 100 include a vehicle tail lamp capable of emitting red light to the rear vehicle, a vehicle brake lamp, a road drawing lamp, and an interpersonal lamp 20. Prepare.
　本実施形態に係る車両用ランプ１０は、車両１００の左側と右側とにそれぞれ設けられている。同様に対人用ランプ２０も、車両１００の両側にそれぞれ設けられている。そこで、車両１００の左側に設けられる対人用ランプ２０を左対人用ランプ２０Ｌと、車両１００の右側に設けられる対人用ランプ２０を右対人用ランプ２０Ｒと呼ぶことがある。 The vehicle lamps 10 according to this embodiment are provided on the left side and the right side of the vehicle 100, respectively. Similarly, personal lamps 20 are provided on both sides of the vehicle 100, respectively. Therefore, the interpersonal lamp 20 provided on the left side of the vehicle 100 is sometimes called the left interpersonal lamp 20L, and the interpersonal lamp 20 provided on the right side of the vehicle 100 is sometimes called the right interpersonal lamp 20R.
　路面描画ランプは、歩行者１等に向けて車両１００の存在を知らしめるために、路面に自車情報等を示す路面描画パターンＰを照射するランプである。対人用ランプ２０は、歩行者１等に対して直接光を照射するランプである。車両１００を操縦するユーザは、対人用ランプ２０により照射された光が歩行者１等により反射した反射光を見て、歩行者１等の存在を認識できる。 The road surface drawing lamp is a lamp that irradiates the road surface with a road surface drawing pattern P indicating the own vehicle information and the like in order to notify the pedestrian 1 and the like of the presence of the vehicle 100 . The interpersonal lamp 20 is a lamp that directly irradiates the pedestrian 1 and the like with light. A user who operates the vehicle 100 can recognize the existence of the pedestrian 1 or the like by seeing the light emitted by the interpersonal lamp 20 and reflected by the pedestrian 1 or the like.
　なお、本開示において「歩行者」とは、必ずしも歩行中の人のみを表す語ではない。「歩行者」は、例えば、路上でただ立っている人や、自転車等の軽車両に乗っている人など、路上にいるあらゆる人を表しうる。 In addition, in the present disclosure, the term "pedestrian" does not necessarily represent only a person who is walking. A "pedestrian" can represent any person on the road, for example, a person just standing on the road or a person riding a light vehicle such as a bicycle.
　図２は、対人用ランプ２０が照射する光の色を説明するためのｘｙ色度図である。また、図２において、点Ａは４８５ｎｍの単波長光を示し、点Ｂは６０５ｎｍの単波長光を示す。また、２点Ａ，Ｂを直線で結ぶ破線は、ｘｙ色度図において、ｙ＝０．２６ｘ＋０．１８２９で表される直線である。 FIG. 2 is an xy chromaticity diagram for explaining the color of light emitted by the personal lamp 20. FIG. In FIG. 2, point A indicates 485 nm single-wavelength light, and point B indicates 605 nm single-wavelength light. Also, the dashed line connecting the two points A and B is a straight line represented by y=0.26x+0.1829 in the xy chromaticity diagram.
　本開示において、対人用ランプ２０が照射する光は有色である。より具体的には、赤色と青色との混色であり、光源から３ｍ先を観測点とすると、図２に示したｘｙ色度図において、破線よりも下方の領域、すなわち、ｙ≦０．２６＋０．１８２９を満たす色である。後述するように、このような色の光は歩行者１等に直接照射されても、歩行者１等にとってはグレアが起きにくく、また、ユーザにとっては視認しやすい。 In the present disclosure, the light emitted by the interpersonal lamp 20 is colored. More specifically, it is a mixed color of red and blue, and if the observation point is 3 m from the light source, the region below the broken line in the xy chromaticity diagram shown in FIG. It is a color that satisfies .1829. As will be described later, even if the pedestrian 1 or the like is directly irradiated with light of such a color, glare is unlikely to occur for the pedestrian 1 or the like, and it is easy for the user to visually recognize the light.
　円滑な交通を行うためには、歩行者等の存在をユーザが認知することが必要である。特に、車両の発進前に、車両の前後近傍に歩行者の存在を確認することは、円滑の交通のために不可欠である。歩行者等の存在をユーザが認知することを助けるため、ランプから照射される光を直接歩行者に照射することで、その反射光をユーザが見て認知できるようにランプを構成することが考えられる。 For smooth traffic, it is necessary for users to recognize the presence of pedestrians. In particular, it is essential for smooth traffic to confirm the presence of pedestrians in the vicinity of the front and rear of the vehicle before starting the vehicle. In order to help users to recognize the presence of pedestrians, it is conceivable to configure the lamp so that the user can see and recognize the reflected light by directly irradiating the pedestrian with the light emitted from the lamp. be done.
　なお特許文献１のような車両用ランプを歩行者等に直接照射することは望ましくない。なぜなら、車両の周囲の歩行者等に向けられる光の照度が高すぎるので、ランプから照射する光が歩行者に対してグレアを引き起こす可能性があるからである。一方、グレアを引き起こさないように、特許文献１に記載のランプの光の照度を低減させた場合は、ユーザは反射光を十分に認知できない可能性がある。このように、歩行者等に光を照射しても、歩行者等の交通を阻害しにくく、かつ、ユーザによって歩行者等を見つけやすいランプの提供を達成するためには向上の余地があった。 It should be noted that it is not desirable to directly irradiate a pedestrian or the like with a vehicle lamp as in Patent Document 1. This is because the illuminance of the light directed at pedestrians and the like around the vehicle is too high, and the light emitted from the lamp may cause glare to the pedestrians. On the other hand, if the illuminance of the lamp light described in Patent Document 1 is reduced so as not to cause glare, the user may not be able to sufficiently perceive the reflected light. In this way, there is room for improvement in order to provide a lamp that does not hinder the traffic of pedestrians and the like even when they are illuminated with light, and that makes it easy for users to find pedestrians and the like. .
　本実施形態に係る対人用ランプ２０が照射する光は、ｘｙ色度図から明らかなように、ｘｙ色度でｙ≦０．２６ｘ＋０．１８２９の領域で表される領域の光は、赤と青の混色の光である。赤色の光は、人の肌に対して分光反射率が高い。このため、赤を含む色の光を車両１００の周囲の歩行者１に照射すると、歩行者１から反射される光が強くなる。また、実験により、赤色の光に青色の光を混ぜると、人の目によって物体を判別しやすくなることが確認できた。
　このため、当該車両用ランプ１０は、車両１００の周囲の歩行者１からの反射強度が高く、かつ、物体を判別しやすい光を照射する。このため、歩行者１に照射する光の強度を抑えて歩行者１に与えるグレアを低減できる。このような理由により、上記構成の対人用ランプ２０は円滑な交通を支援することができる。 As is clear from the xy chromaticity diagram, the light emitted by the personal lamp 20 according to the present embodiment is represented by the xy chromaticity region y≦0.26x+0.1829. is a mixed color light. Red light has a high spectral reflectance with respect to human skin. Therefore, when the pedestrian 1 around the vehicle 100 is irradiated with light of a color including red, the light reflected from the pedestrian 1 becomes stronger. Experiments have also confirmed that mixing red light with blue light makes it easier for the human eye to distinguish between objects.
Therefore, the vehicle lamp 10 emits light that has a high reflection intensity from the pedestrians 1 around the vehicle 100 and that makes it easy to identify objects. For this reason, the intensity of the light that irradiates the pedestrian 1 can be suppressed, and the glare given to the pedestrian 1 can be reduced. For this reason, the pedestrian lamp 20 configured as described above can assist smooth traffic.
　また、本実施形態に係る車両用ランプ１０は、路面描画ランプと対人用ランプ２０とを備えている。これにより、路面描画ランプが路面描画パターンＰを照射することで歩行者１等に車両１００の存在を知らしめることと、対人用ランプ２０の光の照射によりユーザが歩行者１等を見つけやすくすることとを、同時に行う車両用ランプ１０を提供できる。 In addition, the vehicle lamp 10 according to this embodiment includes a road surface drawing lamp and an interpersonal lamp 20 . As a result, the pedestrian 1 or the like is notified of the presence of the vehicle 100 by the road drawing lamp irradiating the road drawing pattern P, and the user can easily find the pedestrian 1 or the like by irradiating the light of the interpersonal lamp 20.例文帳に追加It is possible to provide a vehicular lamp 10 that simultaneously performs the above.
　本実施形態に係る対人用ランプ２０が照射する光の色の彩度は、ある程度以上高いことが望ましい。一般に、明所視輝度Ｌ（ｃｄ／ｍ２）を等しくした場合に、有彩色と無彩色とを比較すると、有彩色の方が明るく見える現象が知られている。有彩色において、実際に見える輝度を等価輝度Ｌｅｑ（ｃｄ／ｍ２）とする。このとき、国際照明委員会（ＣＩＥ）によると、明所視輝度Ｌと等価輝度Ｌｅｑの関係について、次式が成立する。 It is desirable that the saturation of the color of the light emitted from the personal lamp 20 according to the present embodiment is higher than a certain level. In general, it is known that when the photopic luminance L (cd/m 2 ) is made equal and a chromatic color and an achromatic color are compared, the chromatic color appears brighter. In chromatic colors, the luminance that can actually be seen is assumed to be the equivalent luminance L eq (cd/m 2 ). At this time, according to the Commission Internationale de l'Eclairage (CIE), the following equation holds for the relationship between the photopic luminance L and the equivalent luminance L eq .
Figure JPOXMLDOC01-appb-M000002
Figure JPOXMLDOC01-appb-M000002
　さらに、両辺からｌｏｇを消去すると、次式が成立する。 Furthermore, when log is eliminated from both sides, the following formula holds.
Figure JPOXMLDOC01-appb-M000003
Figure JPOXMLDOC01-appb-M000003
　本実施形態に係る対人用ランプ２０において照射される光の色は、ｘｙ色度におけるｘ，ｙの値を式（２）に代入すると、ｆ（ｘ，ｙ）＞１．２であることが望ましい。
　このような対人用ランプ２０は、実際の輝度よりも１．２倍を超えて明るく見えるので、ユーザにとっての視認性が向上する。ユーザが視認するために必要な対人用ランプ２０の照度を低減することができるので、歩行者１等に直接照射してもグレアが発生しにくい対人用ランプ２０が提供される。 Substituting the values of x and y in the xy chromaticity into the equation (2), the color of the light emitted from the personal lamp 20 according to the present embodiment is f(x, y)>1.2. desirable.
Such an interpersonal lamp 20 looks brighter than the actual brightness by more than 1.2 times, so that visibility for the user is improved. Since the illuminance of the interpersonal lamp 20 necessary for the user's visual recognition can be reduced, the interpersonal lamp 20 is provided in which glare is less likely to occur even if the pedestrian 1 or the like is directly illuminated.
　図３は、車両１００に搭載される車両用ヘッドランプおよび路面描画ランプが光を照射する様子を車両１００の右側面から見た図である。図４は、本実施形態に係る対人用ランプ２０が光を照射する様子を車両１００の右側面から見た図である。図３および図４に示すように、光源から３ｍ離れた場所は、観測者（歩行者１等の一例）が立っている観測者地点である。光源から５ｍ離れた場所は、光度を計測する光度観測点である。 FIG. 3 is a view of the vehicle headlamps and road surface drawing lamps mounted on the vehicle 100 irradiating light, viewed from the right side of the vehicle 100. FIG. FIG. 4 is a diagram showing how the interpersonal lamp 20 according to the present embodiment irradiates light, as viewed from the right side of the vehicle 100. As shown in FIG. As shown in FIGS. 3 and 4, a place 3 m away from the light source is an observer point where an observer (an example of a pedestrian 1 or the like) stands. A place 5 m away from the light source is a luminous intensity observation point for measuring luminous intensity.
　光度観測点において、対人用ランプ２０の光度は、１３ｃｄ以下であることが望ましい。このとき、光度観測点における照度は０．５２ｌｘ以下である。一般に、車両用ヘッドランプの光度は１０００ｃｄ以上である。このとき、光度観測点における照度は、４０ｌｘ以上である。 At the luminous intensity observation point, the luminous intensity of the personal lamp 20 is preferably 13 cd or less. At this time, the illuminance at the luminous intensity observation point is 0.52 lx or less. In general, the luminous intensity of vehicle headlamps is 1000 cd or more. At this time, the illuminance at the luminous intensity observation point is 40 lx or more.
　本実施形態に係る対人用ランプ２０の光度は、車両用ヘッドランプの光度と比較して小さいので、歩行者１に対する照度も小さくなる。これにより、とくに車両１００近傍の歩行者１にとって、グレアが発生しにくい。
　なお、歩行者は様々な色の服装を着用しており、その色を判別しやすい波長の光を選定することが難しい。しかしながら、歩行者の肌の色は、概ね薄橙から褐色までと、おおよその色の傾向が限られている。このため本発明者は、歩行者１の肌に反射しやすい波長の光を照射することを考えた。また、本発明者は、歩行者の肌のうち、露出している面積の大きい顔に光を照射することを考えた。このため、対人用ランプ２０の光度は歩行者１にとって眩しさを与えない１３ｃｄ以下とすることが好ましい。 Since the luminous intensity of the interpersonal lamp 20 according to the present embodiment is smaller than the luminous intensity of the vehicle headlamp, the illuminance to the pedestrian 1 is also reduced. As a result, glare is less likely to occur, particularly for the pedestrian 1 near the vehicle 100 .
Pedestrians wear clothes of various colors, and it is difficult to select a wavelength of light that makes it easy to distinguish the colors. Pedestrian skin tones, however, generally have a limited range of colors ranging from light orange to brown. For this reason, the present inventor considered irradiating the pedestrian 1 with light having a wavelength that is likely to be reflected on the skin. In addition, the inventor considered irradiating light on the face, which has a large exposed area of the pedestrian's skin. For this reason, it is preferable that the luminous intensity of the personal lamp 20 is set to 13 cd or less so as not to dazzle the pedestrian 1 .
　図３に戻って、観測者地点において、車両用ヘッドランプから照射される光の上限ＬＢ１および下限ＬＢ２はいずれも１ｍ以下である。これは、観測者が車両用ヘッドランプの光源から十分に離れていない場合は、車両用ヘッドランプからの光は、歩行者１等に対してグレアを引き起こす可能性があるので、車両用ヘッドランプからの光がなるべく歩行者１等の顔に直接照射されないようにするためである。しかし、車両用ヘッドランプの照射によって明らかになるのは、歩行者１等の足や胴体の部分だけである。このため、ユーザにとっては車両用ヘッドランプの照射によって見えた物体が、人なのか物なのか路面の模様なのか、判断がつきづらいことがある。 Returning to FIG. 3, both the upper limit LB1 and the lower limit LB2 of the light emitted from the vehicle headlamp are 1 m or less at the observer's point. This is because the light from the vehicle headlamp can cause glare to pedestrians 1 etc. if the observer is not far enough away from the light source of the vehicle headlamp. This is to prevent the face of the pedestrian 1 or the like from being directly irradiated with the light from the light as much as possible. However, only the legs and torso of the pedestrian 1 and the like are revealed by the illumination of the vehicle headlamps. For this reason, it may be difficult for the user to determine whether the object seen by the illumination of the vehicle headlamp is a person, an object, or a pattern on the road surface.
　また、路面描画ランプは、歩行者１の足元や車両１００の前方の路面に路面描画パターンＰを描画するランプである。したがって路面描画ランプから照射される光の上限ＲＤ１と下限ＲＤ２とは、いずれも観測者地点において１ｍを下回る。 Also, the road surface drawing lamp is a lamp that draws the road surface drawing pattern P on the foot of the pedestrian 1 and on the road surface in front of the vehicle 100 . Therefore, both the upper limit RD1 and the lower limit RD2 of the light emitted from the road drawing lamp are less than 1 m at the observer's point.
　一方、図４に示すように、観測者地点において、本実施形態に係る対人用ランプ２０からの光が照射される光の上限Ｐ１および下限Ｐ２は１ｍ以上である。これにより、対人用ランプ２０の光は、歩行者１等の顔に直接照射されやすい。対人用ランプ２０の光の色は、特に人の肌で反射したときに特に認知しやすい色であることが実験により確認された。したがって、対人用ランプ２０からの光が照射される光の下限を１ｍ以上とすることで、ユーザは歩行者１等の存在をより正確に見つけやすい。 On the other hand, as shown in FIG. 4, at the observer's point, the upper limit P1 and the lower limit P2 of the light emitted from the human lamp 20 according to the present embodiment are 1 m or more. As a result, the face of the pedestrian 1 or the like is likely to be directly irradiated with the light of the interpersonal lamp 20 . It has been confirmed by experiments that the color of the light from the human lamp 20 is particularly easily recognizable when reflected by human skin. Therefore, by setting the lower limit of the light emitted from the interpersonal lamp 20 to 1 m or more, the user can easily find the presence of the pedestrian 1 or the like more accurately.
　図５は、本実施形態に係る対人用ランプ２０が光を照射する様子を車両１００の右側面から見た図である。図４および図５に示すように、左対人用ランプ２０Ｌから照射される光の左限ＰＬ１と左対人用ランプ２０Ｌから照射される光の右限ＰＬ２とがなす角は、対人用ランプ２０から照射される光の上限Ｐ１と対人用ランプ２０から照射される光の下限Ｐ２とがなす角よりも広い。同様に、右対人用ランプ２０Ｒから照射される光の左限ＰＲ１と右対人用ランプ２０Ｒから照射される光の右限ＰＲ２とがなす角は、対人用ランプ２０から照射される光の上限Ｐ１と対人用ランプ２０から照射される光の下限Ｐ２とがなす角よりも広い。
　このように構成することで、水平方向に広く対人用ランプ２０の光を照射できるので、より広い領域にいる歩行者１を見つけやすい。 FIG. 5 is a diagram showing how the interpersonal lamp 20 according to the present embodiment irradiates light, as viewed from the right side of the vehicle 100. As shown in FIG. As shown in FIGS. 4 and 5, the angle formed by the left limit PL1 of the light emitted from the left lamp 20L and the right limit PL2 of the light emitted from the left lamp 20L is It is wider than the angle between the upper limit P1 of the light emitted and the lower limit P2 of the light emitted from the interpersonal lamp 20 . Similarly, the angle between the left limit PR1 of the light emitted from the right personal use lamp 20R and the right limit PR2 of the light emitted from the right personal use lamp 20R is the upper limit P1 of the light emitted from the right personal use lamp 20R. and the lower limit P2 of the light emitted from the lamp 20 for personal use.
By configuring in this way, the light of the interpersonal lamp 20 can be widely irradiated in the horizontal direction, so that the pedestrian 1 in a wider area can be easily found.
　図６は、本実施形態に係る対人用ランプ２０とその周辺機器との関係を示すブロック構成図である。図１、図６に示すように、本実施形態に係る対人用ランプ２０は、歩行者１等の存在を検知するセンサ２１を有していてもよい。センサ２１は、例えば、ＣＭＯＳカメラや赤外線カメラ、ＬｉＤＡＲなどにより、歩行者１等を検知してもよい。 FIG. 6 is a block configuration diagram showing the relationship between the interpersonal lamp 20 and its peripheral devices according to this embodiment. As shown in FIGS. 1 and 6, the pedestrian lamp 20 according to this embodiment may have a sensor 21 for detecting the presence of the pedestrian 1 or the like. The sensor 21 may detect the pedestrian 1 or the like using, for example, a CMOS camera, an infrared camera, LiDAR, or the like.
　対人用ランプ２０は、センサ２１によって歩行者１等を検知すると、検知した歩行者１の方向に向けられるように構成されてもよい。例えば、センサ２１により歩行者１が検知されると、その情報は対人用ランプ２０の受信部２２に送られる。受信部２２に送られた情報を基に、制御部２３は、対人用ランプ２０をどの方向に向ければよいかを判断し、図示しない駆動部を制御することで対人用ランプ２０の向きを変える。さらに、制御部２３は、後述する第一光源２４および第二光源２５が点灯するように制御することで、対人用ランプ２０は、歩行者１等の方向を向いて、光を照射する。 The interpersonal lamp 20 may be configured to be directed toward the detected pedestrian 1 when the sensor 21 detects the pedestrian 1 or the like. For example, when the pedestrian 1 is detected by the sensor 21 , the information is sent to the receiver 22 of the pedestrian lamp 20 . Based on the information sent to the receiving unit 22, the control unit 23 determines in which direction the interpersonal lamp 20 should be oriented, and changes the orientation of the interpersonal lamp 20 by controlling a driving unit (not shown). . Further, the control unit 23 controls the lighting of the first light source 24 and the second light source 25, which will be described later, so that the interpersonal lamp 20 irradiates light toward the pedestrian 1 and the like.
　このように構成することで、対人用ランプ２０は歩行者１等をより正確に照射できるので、ユーザの歩行者１等の発見を助けることができる。 By configuring in this way, the interpersonal lamp 20 can more accurately illuminate the pedestrian 1 and the like, so that it can help the user to find the pedestrian 1 and the like.
　また、対人用ランプ２０は、車両１００に関する特定の情報を取得し通信することが可能な車両制御部３０と通信可能に接続されていてもよい。
　車両制御部３０は、例えば、車両１００が停止状態のときに、車両１００のギアを「ドライブギア」に入れた、という情報を取得し、これを受信部２２に送信する。受信部２２によって受信された情報を基に、制御部２３は、車両１００の前方の対人用ランプ２０の第一光源２４および第二光源２５を制御して、第一光源２４および第二光源２５から光を出射させる。これによって、対人用ランプ２０は、車両１００が前方に発進する際に、ユーザによる車両１００の前方に歩行者１がいるかどうかの認知を補助することができる。 Also, the interpersonal lamp 20 may be communicably connected to a vehicle control unit 30 capable of acquiring and communicating specific information about the vehicle 100 .
The vehicle control unit 30 acquires, for example, information indicating that the vehicle 100 has been put into the “drive gear” when the vehicle 100 is in a stopped state, and transmits this to the reception unit 22 . Based on the information received by the receiving unit 22, the control unit 23 controls the first light source 24 and the second light source 25 of the interpersonal lamp 20 in front of the vehicle 100 to turn on the first light source 24 and the second light source 25. emit light from Thus, the pedestrian lamp 20 can assist the user in recognizing whether or not there is a pedestrian 1 in front of the vehicle 100 when the vehicle 100 starts forward.
　別の例を挙げると、車両制御部３０は、車両１００が停止状態のときに、車両１００のギアを「リバースギア」に入れた、という情報を取得し、これを受信部２２に送信する。受信部２２によって受信された情報を基に、制御部２３は、車両１００の後方の対人用ランプ２０の第一光源２４および第二光源２５を制御して、第一光源２４および第二光源２５から光を出射させる。これによって、対人用ランプ２０は、ユーザによる車両１００が後方に発進する際に、車両１００の後方に歩行者１がいるかどうかの認知を補助することができる。 To give another example, the vehicle control unit 30 acquires information that the vehicle 100 has been put into "reverse gear" when the vehicle 100 is in a stopped state, and transmits this to the receiving unit 22. Based on the information received by the receiving unit 22, the control unit 23 controls the first light source 24 and the second light source 25 of the interpersonal lamp 20 behind the vehicle 100 to turn on the first light source 24 and the second light source 25. emit light from Thus, the pedestrian lamp 20 can assist the user in recognizing whether or not the pedestrian 1 is behind the vehicle 100 when the vehicle 100 starts backward.
　このように、車両制御部３０の情報を基に、制御部２３は対人用ランプ２０による光の照射を制御する。これにより、対人用ランプ２０は、例えば車両１００が発進するときに、車両１００の前方および後方の少なくとも一方にいる歩行者１等を、ユーザが発見することを補助できる。 Thus, based on information from the vehicle control unit 30, the control unit 23 controls light irradiation by the interpersonal lamp 20. As a result, the pedestrian lamp 20 can assist the user in finding the pedestrian 1 or the like in at least one of the front and rear of the vehicle 100 when the vehicle 100 starts moving, for example.
　次に、対人用ランプ２０を実現する光学系の構成について説明する。図７は、本実施形態に係る対人用ランプ２０の光学系の一例を例示する。対人用ランプ２０は、第一光源２４と、第二光源２５と、光学部材とを含む。第一光源２４は赤色の光を出射する光源である。第一光源２４が出射する光の波長範囲は、６０５ｎｍ以上８３０ｎｍ以下である。第二光源２５は青色の光を出射する光源である、第二光源２５が出射する光の波長範囲は、３８０ｎｍ以上４８５ｎｍ以下である。 Next, the configuration of the optical system that realizes the interpersonal lamp 20 will be described. FIG. 7 illustrates an example of the optical system of the personal lamp 20 according to this embodiment. The personal lamp 20 includes a first light source 24, a second light source 25, and an optical member. The first light source 24 is a light source that emits red light. The wavelength range of the light emitted by the first light source 24 is 605 nm or more and 830 nm or less. The second light source 25 is a light source that emits blue light, and the wavelength range of the light emitted by the second light source 25 is 380 nm or more and 485 nm or less.
　光学部材は、第一光源２４が出射した光と第二光源２５が出射した光とを合波させる部材である。本実施形態においては、光学部材は一方に無数の凹凸を有する拡散板２６である。光学部材は拡散板２６に限られず、第一光源２４が出射した光と第二光源２５が出射した光とを合波させることができれば、どのような部材でもよい。 The optical member is a member that combines the light emitted by the first light source 24 and the light emitted by the second light source 25 . In this embodiment, the optical member is a diffuser plate 26 having numerous irregularities on one side. The optical member is not limited to the diffusion plate 26, and any member may be used as long as the light emitted from the first light source 24 and the light emitted from the second light source 25 can be combined.
　次に、第一光源２４および第二光源２５から出射された光が進行する様子について説明する。第一光源２４および第二光源２５が出射した光はリフレクタによって反射される。リフレクタは、第一光源２４および第二光源２５から出射された光の光路が平行となって拡散板２６に入射するように、第一光源２４および第二光源２５から出射された光を反射する部材である。平行光となって拡散板２６に入射した光は、拡散板２６の凹凸部分で屈折した状態で拡散板２６内を進行する。拡散板２６の表面において、一部の光は拡散板２６の外に出射されるが、一部の光は反射されて、なおも拡散板２６の内部を進行する。これを繰り返すことによって、拡散板２６から出射される光は拡散されて進行するとともに、その内部において第一光源２４および第二光源２５が出射した光が合波される。拡散板２６内部で合波された光は、赤色と青色との混色の光として出射される。 Next, how the light emitted from the first light source 24 and the second light source 25 travel will be described. Light emitted by the first light source 24 and the second light source 25 is reflected by the reflector. The reflector reflects the light emitted from the first light source 24 and the second light source 25 so that the optical paths of the light emitted from the first light source 24 and the second light source 25 are parallel and enter the diffusion plate 26. It is a member. The parallel light incident on the diffuser plate 26 travels through the diffuser plate 26 while being refracted by the uneven portions of the diffuser plate 26 . On the surface of the diffuser plate 26 , some of the light is emitted outside the diffuser plate 26 while some of the light is reflected and still travels inside the diffuser plate 26 . By repeating this, the light emitted from the diffuser plate 26 is diffused and propagated, and the lights emitted by the first light source 24 and the second light source 25 are combined inside. The light combined inside the diffuser plate 26 is emitted as a mixed color light of red and blue.
　上記の構成により、赤色と青色の混色の光の照射を簡単な構成で実現できる。 With the above configuration, mixed red and blue light irradiation can be achieved with a simple configuration.
（光源の変形例）
　なお、赤色と青色との混色の光は、本実施形態の例示に限られない。例えば、対人用ランプは、一つの光源で赤色と青色との混色の光を照射できるように構成されてもよい。
　図８は、変形例として一つの光源２４Ａが赤色と青色との混色の光を出射する様子を示す図である。本変形例においては、光源２４Ａは、赤色の光を出射する光源チップ２４１と、光源チップ２４１の周囲を覆うように形成される発光層２４２とを有する。発光層２４２は、その内部に、光線が当たると青色の光を発する蛍光体２４２ａを備える。このような構成によれば、１つの光源チップ２４１で特定の色の光を発することができるので、省スペースで対人用ランプを実現できる。
　なお、光源チップは青色の光を出射して、発光層は光線当たると赤色光を発する蛍光体を含むように、光源が構成されてもよい。
　また、蛍光体は必ずしも要されない。光源チップが、赤色と青色との混色に相当する特定の色を直接出射できる場合は、蛍光体が設けられなくてもよい。 (Modified example of light source)
Note that the mixed color light of red and blue is not limited to the example of this embodiment. For example, the personal lamp may be configured so that a single light source can emit a mixture of red and blue light.
FIG. 8 is a diagram showing how one light source 24A emits mixed-color light of red and blue as a modification. In this modified example, the light source 24A has a light source chip 241 that emits red light and a light emitting layer 242 that covers the light source chip 241 . The light-emitting layer 242 has therein a phosphor 242a that emits blue light when exposed to light. According to such a configuration, a single light source chip 241 can emit light of a specific color, so that a space-saving human lamp can be realized.
The light source may be configured such that the light source chip emits blue light, and the light emitting layer includes a phosphor that emits red light when exposed to light.
Also, the phosphor is not necessarily required. If the light source chip can directly emit a specific color corresponding to a mixture of red and blue, the phosphor may not be provided.
　図７に戻って、図７のような構成の対人用ランプ２０は、特に、車両用テールランプあるいは車両用ブレーキランプの内部に設けられると良い。車両用テールランプおよび車両用ブレーキランプは、車両用ランプ１０の一例である。換言すれば、車両用テールランプあるいは車両用ブレーキランプは、対人用ランプ２０を内部に含むように構成されても良い。より具体的には第一光源２４は車両用テールランプあるいは車両用ブレーキランプの赤色灯としても、対人用ランプ２０の赤色の光としても使用されるように構成されていることが望ましい。これにより、対人用ランプ２０は、車両用テールランプあるいは車両用ブレーキランプの赤色灯としても構成され、赤色と青色との混色を照射するようにも構成される。このため、対人用ランプ２０は、車両用テールランプあるいは車両用ブレーキランプの内部に設けられてもよいので、対人用ランプ２０は、省スペースに搭載されることが可能である。また、車両用テールランプあるいは車両用ブレーキランプの内部に対人用ランプ２０が設けられるので、その意匠性も損なうことなく、対人用ランプ２０が搭載されることができる。 Returning to FIG. 7, the interpersonal lamp 20 configured as shown in FIG. 7 is particularly preferably provided inside a vehicle tail lamp or a vehicle brake lamp. A vehicle tail lamp and a vehicle brake lamp are examples of the vehicle lamp 10 . In other words, a vehicle tail lamp or a vehicle brake lamp may be configured to include the interpersonal lamp 20 therein. More specifically, the first light source 24 is desirably configured so as to be used as a red light for a vehicle tail lamp or a vehicle brake lamp and also as a red light for the interpersonal lamp 20 . Thus, the human lamp 20 is also configured as a red light for a vehicle tail lamp or a vehicle brake lamp, and is also configured to irradiate mixed colors of red and blue. Therefore, the interpersonal lamp 20 may be provided inside the vehicle tail lamp or the vehicle brake lamp, so that the interpersonal lamp 20 can be mounted in a space-saving manner. Further, since the interpersonal lamp 20 is provided inside the vehicle tail lamp or the vehicle brake lamp, the interpersonal lamp 20 can be mounted without impairing its design.
　対人用ランプ２０は、車両用テールランプあるいは車両用ブレーキランプの赤色灯として使用される場合、第一光源２４を点灯させて、第二光源２５を消灯させる。逆に、対人用ランプ２０は、赤色と青色との混色を照射する場合、第一光源２４と第二光源２５とを点灯させる。 When the interpersonal lamp 20 is used as a red light for a vehicle tail lamp or a vehicle brake lamp, the first light source 24 is turned on and the second light source 25 is turned off. Conversely, the personal lamp 20 turns on the first light source 24 and the second light source 25 when irradiating mixed colors of red and blue.
　このような構成によれば、対人用ランプ２０は、第一光源２４を点灯させ、第二光源２５を消灯させることにより、赤色の光を照射することができる。また、対人用ランプ２０は、、第一光源２４と第二光源２５とを点灯させることにより、赤色と青色の混色の光を照射することができる。このように、車両用テールランプあるいは車両用ブレーキランプとしての機能と対人用ランプ２０としての機能との切り替えを簡単な構成で実現できる。 According to such a configuration, the interpersonal lamp 20 can emit red light by turning on the first light source 24 and turning off the second light source 25 . In addition, the human lamp 20 can irradiate a mixed color light of red and blue by turning on the first light source 24 and the second light source 25 . In this manner, switching between the function as the vehicle tail lamp or the vehicle brake lamp and the function as the interpersonal lamp 20 can be realized with a simple configuration.
　図９は、車両用テールランプあるいは車両用ブレーキランプが対人用ランプ２０を備える場合の光学系の別例を示す図である。なお、リフレクタおよび拡散板２６Ａの凹凸部分の図示は省略されている。また、図９において破線は、どの光源からの光が光学部材のどの部分に入射するかを模式的に示したものであって、光源からの光の光路を示すものではない。 FIG. 9 is a diagram showing another example of an optical system in the case where a vehicle tail lamp or a vehicle brake lamp is provided with the interpersonal lamp 20. FIG. It should be noted that the illustration of the uneven portions of the reflector and the diffuser plate 26A is omitted. Also, in FIG. 9, the dashed lines schematically indicate which light source illuminates which part of the optical member, and do not indicate the optical path of the light from the light source.
　図９に示すように、第一光源２４からの光が拡散板２６Ａ（光学部材）の全域に入射しているのに対し、第二光源２５からの光は、第一光源２４からの光が入射する領域の一部のみに入射する。換言すると、拡散板２６Ａは、第一光源２４からの光も第二光源２５からの光も入射する合波部２６１と、第一光源２４からの光のみが入射する非合波部２６２とを有する。合波部２６１と非合波部２６２との境界には遮蔽部２６３が設けられている。遮蔽部２６３は、合波部２６１に入射した光と非合波部２６２に入射した光とが混ざらないように構成されている。 As shown in FIG. 9, the light from the first light source 24 is incident on the entire diffusion plate 26A (optical member), while the light from the second light source 25 is different from the light from the first light source 24. Incident on only part of the incident area. In other words, the diffuser plate 26A has a combining portion 261 into which both the light from the first light source 24 and the light from the second light source 25 enter, and the non-combining portion 262 into which only the light from the first light source 24 enters. have. A shielding portion 263 is provided at the boundary between the multiplexing portion 261 and the non-multiplexing portion 262 . The shielding portion 263 is configured so that the light incident on the multiplexing portion 261 and the light incident on the non-multiplexing portion 262 are not mixed.
　上記の構成の対人用ランプ２０は、赤色だけの光と赤色と青色の混色の光とを、同時に照射できる。これにより、車両用テールランプあるいは車両用ブレーキランプとしての機能と対人用ランプ２０としての機能とを両立できる。 The interpersonal lamp 20 configured as described above can irradiate only red light and mixed red and blue light at the same time. Thereby, the function as a vehicle tail lamp or a vehicle brake lamp and the function as an interpersonal lamp 20 can be compatible.
　（実験結果）
　次に、本開示の対人用ランプの有用性を実証する実験とその実験結果とについて説明する。本開示は、３種類の実験とその結果を示す。 (Experimental result)
Next, experiments for demonstrating the usefulness of the personal lamp of the present disclosure and the results of the experiments will be described. This disclosure presents three types of experiments and their results.
　（実験１）
　各波長の光を人の肌に照射したときの分光反射率が調べられ、その結果が集計された。実験１の結果を図１０に示す。図１０に示すように、６００ｎｍを超える波長範囲の光が肌に照射された場合の分光反射率が高い。この結果から、赤色の光は、人の肌に対する分光反射率がすぐれていることが確認された。 (Experiment 1)
The spectral reflectance was examined when light of each wavelength was applied to human skin, and the results were tabulated. The results of Experiment 1 are shown in FIG. As shown in FIG. 10, the spectral reflectance is high when the skin is irradiated with light in a wavelength range exceeding 600 nm. From this result, it was confirmed that red light has excellent spectral reflectance for human skin.
　（実験２）
　赤色、緑色、青色、およびこれらの色の混色が顔面に照射されたたときの視認性について３段階で評価する官能評価が行われた。なお以下の説明において、赤色をＲと呼ぶことがある。緑色をＧと呼ぶことがある。青色をＢと呼ぶことがある。赤色と緑色との混色をＲＧと呼ぶことがある。赤色と青色との混色をＲＢと呼ぶことがある。緑色と青色との混色をＧＢと呼ぶことがある。赤色と緑色と青色との混色をＲＧＢと呼ぶことがある。 (Experiment 2)
A sensory evaluation was conducted in which visibility was evaluated on a three-grade scale when red, green, blue, and a mixture of these colors were applied to the face. In the following description, red may be referred to as R. Green is sometimes called G. Blue is sometimes called B. A mixed color of red and green is sometimes called RG. A mixed color of red and blue is sometimes called RB. A mixed color of green and blue is sometimes called GB. Mixed colors of red, green, and blue are sometimes called RGB.
　図１１に官能評価の結果を示す。実験１において分光反射率が良いと確認されたＲ光だけでは、視認性が必ずしもいいとは限らないことが示された。また、ＲＢ光が最も視認性が良くなることが示された。 Fig. 11 shows the results of the sensory evaluation. It was shown that the R light, which was confirmed to have good spectral reflectance in Experiment 1, does not necessarily have good visibility. It was also shown that RB light has the best visibility.
　（実験３）
　実験２において、最も視認性が良かったＲＢ光と白色光との視認距離の比較が行われた。図２に示すｘｙ色度図には、実験３において比較した光の色を示す点Ｃおよび点Ｄが図示されている。点ＣはＲＢ光を示している。図２に示すように、点Ｃはｙ≦０．２６ｘ＋０．１８２９を満たす。点Ｄは白色光を示している。点Ｄは、図２に示す領域Ｗの内部に存在する点である。領域Ｗは、自動車の構造及び装置について規制するＵＮ法規において定められる前照灯の白色領域である。 (Experiment 3)
In Experiment 2, a comparison was made between the visible distances of RB light and white light, which had the best visibility. In the xy chromaticity diagram shown in FIG. 2, points C and D indicating the colors of light compared in Experiment 3 are illustrated. Point C indicates RB light. As shown in FIG. 2, point C satisfies y≦0.26x+0.1829. Point D indicates white light. Point D is a point that exists inside region W shown in FIG. Region W is the white region of the headlamp as defined in UN regulations governing the construction and installation of motor vehicles.
　上述した２点Ｃ，Ｄが表す色の光が光源から３ｍ先の人の顔に照射された。このとき、人の顔を何ｍ離れていても視認できるかについて調査された。なお、照射する光源の光度は、１０ｃｄと２０ｃｄである。実験結果を図１２に示す。図１２に示すように、白色光を顔面に照射したときよりもＲＢ光を顔面に照射したときの方が、視認距離が長くなっている。光度が１０ｃｄであっても２０ｃｄであっても、ＲＢ光における視認距離は白色光における視認距離よりも１０ｍ以上長くなっている。このことから、ＲＢ光は、白色光よりも視認されやすくなることが確認された。 The light of the color represented by the two points C and D described above was illuminated on a person's face 3m away from the light source. At this time, it was investigated whether a person's face could be visually recognized no matter how many meters away it was. The light intensities of the illuminating light sources are 10 cd and 20 cd. The experimental results are shown in FIG. As shown in FIG. 12, the visible distance is longer when the face is irradiated with RB light than when the face is irradiated with white light. Regardless of whether the luminous intensity is 10 cd or 20 cd, the visible distance for RB light is longer than the visible distance for white light by 10 m or more. From this, it was confirmed that RB light is more visible than white light.
　以上、実施形態および実験結果に基づいて本開示を説明した。本実施形態は本開示の一例であって、上述した実施形態に限定されず、適宜、変形、改良等が自在である。その他、上述した実施形態における各構成要素の材質、形状、寸法、数値、形態、数、配置場所等は、本開示を達成できるものであれば任意であり、限定されない。 The present disclosure has been described above based on the embodiments and experimental results. This embodiment is an example of the present disclosure, and is not limited to the above-described embodiment, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, numerical value, form, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present disclosure can be achieved.
　例えば、第一光源および第二光源を光学部材に入射させる方法には、いかなる公知の手段が用いられてもよい。例えば、リフレクタが用いられる代わりに、コリメートレンズが用いられてもよい。 For example, any known means may be used for the method of causing the first light source and the second light source to enter the optical member. For example, instead of using reflectors, collimating lenses may be used.
　以下に列挙される構成もまた、本開示の一部を構成する。
（１）
　光源から３ｍ先において、ｘｙ色度図におけるｙ≦０．２６ｘ＋０．１８２９で表される色の光を照射する対人用ランプ。
（２）
　前記対人用ランプから照射される光は、ｘｙ色度図において、以下の式を満たす、
　(１)に記載の対人用ランプ。
Figure JPOXMLDOC01-appb-M000004
（３）
　光源から５ｍ先において、ランプ光度は１３ｃｄ以下である、
　(１)または(２)に記載の対人用ランプ。
（４）
　光源から３ｍ先において、地上から１ｍ以上の高さに光を照射する、
　(１)から(３)のいずれかに記載の対人用ランプ。
（５）
　垂直方向よりも水平方向に広く光を照射する、
　(１)から(４)のいずれかに記載の対人用ランプ。
（６）
　赤色の光を出射する第一光源と、
　青色の光を出射する第二光源と、
　前記第一光源の光と前記第二光源の光とを合波する光学部材と、
　を有する(１)から(５)のいずれかに記載の対人用ランプ。
（７）
　路面描画ランプと、(１)から(６)のいずれかに記載の対人用ランプとを備えた、
　車両用ランプ。
（８）
　(６)に記載の対人用ランプを備えた、
　車両用テールランプあるいは車両用ブレーキランプ。
（９）
　前記車両用テールランプあるいは前記車両用ブレーキランプとして作動するときは、前記第二光源は消灯している、
　(８)に記載の車両用テールランプあるいは車両用ブレーキランプ。
（１０）
　前記光学部材は、前記第二光源からの光が入射可能な合波部と前記第二光源からの光が入射しない非合波部とを有する、
　(９)に記載の車両用テールランプあるいは車両用ブレーキランプ。 The configurations listed below also form part of this disclosure.
(1)
An anti-personnel lamp that emits light of a color represented by y≦0.26x+0.1829 in the xy chromaticity diagram at a distance of 3 m from the light source.
(2)
The light emitted from the personal lamp satisfies the following formula in the xy chromaticity diagram,
(1) The interpersonal lamp described in (1).
Figure JPOXMLDOC01-appb-M000004
(3)
At 5 m from the light source, the lamp luminous intensity is 13 cd or less,
An interpersonal lamp according to (1) or (2).
(4)
Irradiate light at a height of 1 m or more from the ground at 3 m from the light source,
An antipersonnel lamp according to any one of (1) to (3).
(5)
Irradiate light more horizontally than vertically,
An antipersonnel lamp according to any one of (1) to (4).
(6)
a first light source that emits red light;
a second light source that emits blue light;
an optical member for combining the light from the first light source and the light from the second light source;
The personal lamp according to any one of (1) to (5).
(7)
Equipped with a road surface drawing lamp and an interpersonal lamp according to any one of (1) to (6),
vehicle lamp.
(8)
Equipped with an interpersonal lamp according to (6),
Vehicle tail lights or vehicle brake lights.
(9)
When operating as the vehicle tail lamp or the vehicle brake lamp, the second light source is extinguished.
The vehicle tail lamp or vehicle brake lamp according to (8).
(10)
The optical member has a combining portion into which light from the second light source can enter and a non-combining portion into which light from the second light source does not enter,
The vehicle tail lamp or vehicle brake lamp according to (9).
　本出願は、２０２１年１１月２２日に出願された日本国特許出願（特願２０２１－１８９５７７号）に開示された内容を適宜援用する。 This application appropriately incorporates the content disclosed in the Japanese patent application (Japanese Patent Application No. 2021-189577) filed on November 22, 2021.

Claims (10)

  1. 　光源から３ｍ先において、ｘｙ色度図におけるｙ≦０．２６ｘ＋０．１８２９で表される色の光を照射する対人用ランプ。 A human lamp that emits light of a color represented by y ≤ 0.26x + 0.1829 in the xy chromaticity diagram at a distance of 3 m from the light source.
  2. 　前記対人用ランプから照射される光は、ｘｙ色度図において、以下の式を満たす、
    　請求項１に記載の対人用ランプ。
    Figure JPOXMLDOC01-appb-M000001
         The light emitted from the personal lamp satisfies the following formula in the xy chromaticity diagram,
    An anti-personnel lamp according to claim 1.
    Figure JPOXMLDOC01-appb-M000001
  3. 　光源から５ｍ先において、ランプ光度は１３ｃｄ以下である、
    　請求項１または請求項２に記載の対人用ランプ。     At 5 m from the light source, the lamp luminous intensity is 13 cd or less,
    An antipersonnel lamp according to claim 1 or 2.
  4. 　光源から３ｍ先において、地上から１ｍ以上の高さに光を照射する、
    　請求項１または請求項２に記載の対人用ランプ。     Irradiate light at a height of 1 m or more from the ground at 3 m from the light source,
    An antipersonnel lamp according to claim 1 or 2.
  5. 　垂直方向よりも水平方向に広く光を照射する、
    　請求項１または請求項２に記載の対人用ランプ。     Irradiate light more horizontally than vertically,
    An antipersonnel lamp according to claim 1 or 2.
  6. 　赤色の光を出射する第一光源と、
    　青色の光を出射する第二光源と、
    　前記第一光源の光と前記第二光源の光とを合波する光学部材と、
    　を有する請求項１または請求項２に記載の対人用ランプ。     a first light source that emits red light;
    a second light source that emits blue light;
    an optical member for combining the light from the first light source and the light from the second light source;
    3. An antipersonnel lamp according to claim 1 or claim 2, comprising:
  7. 　路面描画ランプと、請求項１または請求項２に記載の対人用ランプとを備えた、
    　車両用ランプ。     A road surface drawing lamp and the interpersonal lamp according to claim 1 or claim 2,
    vehicle lamp.
  8. 　請求項６に記載の対人用ランプを備えた、
    　車両用テールランプあるいは車両用ブレーキランプ。     Equipped with the interpersonal lamp according to claim 6,
    Vehicle tail lights or vehicle brake lights.
  9. 　前記車両用テールランプあるいは前記車両用ブレーキランプとして作動するときは、前記第二光源は消灯している、
    　請求項８に記載の車両用テールランプあるいは車両用ブレーキランプ。     When operating as the vehicle tail lamp or the vehicle brake lamp, the second light source is extinguished.
    The vehicle tail lamp or vehicle brake lamp according to claim 8.
  10. 　前記光学部材は、前記第二光源からの光が入射可能な合波部と前記第二光源からの光が入射しない非合波部とを有する、
    　請求項９に記載の車両用テールランプあるいは車両用ブレーキランプ。     The optical member has a combining portion into which light from the second light source can enter and a non-combining portion into which light from the second light source does not enter,
    The vehicle tail lamp or vehicle brake lamp according to claim 9.
PCT/JP2022/042872 2021-11-22 2022-11-18 Personnel lamp and vehicle lamp WO2023090426A1 (en)

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JP2009286199A (en) * 2008-05-27 2009-12-10 Koito Mfg Co Ltd Lighting system for irradiating pedestrian, and vehicular headlamp device
JP2011084106A (en) * 2009-10-13 2011-04-28 Denso Corp Directivity control lighting system
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Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000513293A (en) * 1996-06-13 2000-10-10 ジェンテクス・コーポレーション Illuminator assembly incorporating light emitting diodes
JP2009286199A (en) * 2008-05-27 2009-12-10 Koito Mfg Co Ltd Lighting system for irradiating pedestrian, and vehicular headlamp device
JP2011084106A (en) * 2009-10-13 2011-04-28 Denso Corp Directivity control lighting system
JP2017159881A (en) * 2016-03-10 2017-09-14 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ Recognition result presentation device, recognition result presentation method and autonomous movable body
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WO2020067113A1 (en) * 2018-09-25 2020-04-02 株式会社小糸製作所 Lamp fitting system and vehicle lamp fitting

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