WO2022030387A1 - 路面描画機能を備えた車両用灯具 - Google Patents

路面描画機能を備えた車両用灯具 Download PDF

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Publication number
WO2022030387A1
WO2022030387A1 PCT/JP2021/028362 JP2021028362W WO2022030387A1 WO 2022030387 A1 WO2022030387 A1 WO 2022030387A1 JP 2021028362 W JP2021028362 W JP 2021028362W WO 2022030387 A1 WO2022030387 A1 WO 2022030387A1
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WO
WIPO (PCT)
Prior art keywords
light
road surface
light source
vehicle
lamp
Prior art date
Application number
PCT/JP2021/028362
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
進 金子
賢 渡邉
壮宜 鬼頭
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Publication of WO2022030387A1 publication Critical patent/WO2022030387A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • 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
    • B60Q1/04—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 the devices being headlights
    • 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
    • B60Q1/22—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 reverse drive
    • 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
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • 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
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/45—Reversing lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • the present invention relates to a vehicle lamp, particularly a vehicle lamp having a road surface drawing function in addition to the function of a headlight or a marker lamp.
  • the present invention has been made in view of this, and provides a vehicle lamp having a simple structure and a road surface drawing function.
  • a vehicle lighting device having a road surface drawing function in addition to the function as a headlight or a marker light, and the headlight or a common light source is used. It is configured to include an optical unit that functions as a marker lamp and a road surface drawing unit that functions to project a drawing pattern onto a road surface, and the optical unit and the road surface drawing unit are configured to perform irradiation related to an irradiation purpose. Configured. According to this aspect, since the light source is common, the overall size can be reduced. Furthermore, the emitted contents are related, and the functional effect can be enhanced by the synergistic effect.
  • the optical unit forms a part of the emitted light of the light source in a predetermined light distribution pattern and irradiates the optical unit
  • the road surface drawing unit forms another part of the emitted light of the light source. It was configured to form a drawing pattern related to the purpose of irradiation of the optical unit and project it onto the road surface. According to this aspect, in order to share the emitted light of one light source, the light distribution and the timing of turning on and off the drawing pattern are linked. The configuration can be simplified without the need for complicated control mechanisms.
  • the road surface drawing unit is configured to include a lens that forms incident light into a predetermined drawing pattern and emits the light. Since the drawing pattern can be irradiated just by injecting light, no control circuit is required and the configuration can be simplified.
  • the light source commonly used by the optical unit and the road surface drawing unit includes a plurality of light emitting elements, and the plurality of light emitting elements are of a drawing pattern projected by the road surface drawing unit. It was configured so that the arrangement was determined by the shape. The required characteristics differ depending on the shape of the drawing pattern projected on the road surface. By matching the arrangement of the light emitting elements with the required characteristics, it is possible to make the outer diameter of the drawing pattern clearer and to reduce the unevenness of light and darkness by keeping the overall brightness of the drawing pattern constant.
  • the optical unit is determined to be arranged relative to the road surface drawing unit according to the height and angle at which the light source is arranged. Mainly, the arrangement of the road surface drawing unit is first determined, and the arrangement of the optical unit is determined depending on how the remaining light distribution is used. As a result, it is possible to project a drawing pattern having a clearer outer shape and a brighter shape on the road surface.
  • FIG. 1 (A) is a plan view
  • FIG. 1 (B) is a side view
  • It is a lamp for the vehicle, and is an explanatory diagram for explaining the configuration.
  • FIG. 2A is a side view
  • FIG. 2B is a plan view.
  • the housing is shown by the dotted line to show the internal configuration.
  • It is a schematic block diagram which shows the structure of the lamp for the vehicle schematicly, and is an explanatory diagram mainly about the optical path of the light emitted from a light source. It is a schematic side view for demonstrating the structure of a lens.
  • FIG. 5 (A) is a rear perspective view
  • FIG. 5 (B) is a plan view
  • FIG. 5 (C) is a side view
  • FIG. 6 (A) is a perspective view
  • FIG. 6 (B) is a side view of the lighting fixture for the vehicle.
  • FIG. 8A mainly shows the outer surface side which is the exit surface
  • FIG. 8B mainly shows the inner surface side which is the incident surface.
  • FIG. 1 shows a vehicle C equipped with a vehicle lamp 1 according to the first embodiment.
  • the vehicle lighting tool 1 is a front turn signal lamp that is mounted on the front portion of the vehicle C and functions as a sign light when the traveling direction of the vehicle C is changed to the left or right.
  • the vehicle lamps 1 are provided in pairs on the left and right, and are symmetrical to each other. Hereinafter, the vehicle lamp 1 mounted on the right side will be focused on and described.
  • the vehicle lighting tool 1 forms an amber-colored diffused light as the light distribution LD1 of the turn signal lamp toward the front of the vehicle C, blinks the light, and the vehicle C blinks to the right. Notify the driver of the oncoming vehicle, the vehicle driver of the traveling route, etc. that the vehicle is moving toward the direction.
  • the vehicle lamp 1 projects a series of substantially inverted V-shaped drawing patterns M1 on the road surface GR on the front right side.
  • the drawing pattern M1 is turned off at a predetermined cycle, and the timing of turning off the dots is the same as the timing of turning off the blinking light distribution LD1.
  • the drawing pattern M1 causes pedestrians and the like existing in the traveling direction to recognize the traveling path of the vehicle C and call attention to them.
  • the vehicle lamp 1 has a road surface drawing function in addition to the function as a conventional indicator lamp, and both irradiations are related to the purpose.
  • the vehicle lighting tool 1 turns on and off the light distribution LD1 as diffused light from the right side of the vehicle C to the front, and further projects a drawing pattern M1 toward the traveling direction on the road surface. Both of these are irradiations for the same purpose of "notifying the surroundings of the movement of the vehicle C to the right and calling attention", and the vehicle lamp 1 functions by irradiating the contents of both functions in relation to each other. The effect is enhanced.
  • the configuration of the present disclosure is not limited to front turn signal lamps, but headlights include high beam lamps, low beam lamps, fog lamps, and indicator lamps include tail lamps, stop lamps, daylight running lamps, clearance lamps, and side turn signal lamps. It can also be used for automatic operation indicator lamps and the like.
  • headlights such as high-beam lamps and low-beam lamps have a specified light distribution at a predetermined distance
  • indicator lights have a specified range of maximum luminous intensity and left-right irradiation angle. Regardless of whether it is a headlight or an indicator lamp, the form of light irradiated so as to satisfy the regulations set for each vehicle lamp is referred to as light distribution.
  • FIG. 2 is a schematic view showing the configuration of the vehicle lamp 1.
  • FIG. 2A is a side view
  • FIG. 2B is a plan view.
  • the housing is shown by the dotted line to show the internal configuration.
  • FIG. 3 is an explanatory diagram showing an optical path of light emitted from a light source.
  • the lamp body 1 for a vehicle has a lamp body 40 having an opening in the front and a lamp cover 50 made of a translucent resin, glass, or the like attached to the opening of the lamp body 40. And.
  • the lamp body 40 and the lamp cover 50 are housings for the vehicle lamp 1, and a lamp chamber S is formed inside the lamp body 40 and the lamp cover 50.
  • a lens 10, a step reflector 20, and a light source 30 in which a light emitting element is mounted on a substrate are mainly arranged.
  • the lens 10 is fixed to the lamp body 40 by a pair of legs 15 extending from the side surface to the back surface.
  • the step reflector 20 and the light source 30 are also fixed to the lamp body 40 by a fixing member (not shown).
  • the step reflector 20 is a step-shaped reflector divided into a plurality of reflecting elements.
  • the inner surface is a reflective surface that reflects light, and is configured to reflect the incident light and irradiate it forward as a predetermined light distribution.
  • the lens 10 is an optical member that incidents light from an incident surface and emits light from an emitted surface.
  • the lens 10 is a drawing lens having an emission surface of a free curved surface that forms incident light in a desired drawing pattern. The detailed shape of the lens 10 will be described later.
  • a semiconductor light emitting element such as an LED (Light Emitting Diode), LD (Laser Diode), EL (Electro Luminescence) element, a light bulb, an incandescent lamp (halogen lamp), a discharge lamp (discharge lamp), or the like is used. Can be done. In this embodiment, an LED that emits amber-colored light is used as a light emitting element.
  • the vehicle lighting tool 1 includes an optical unit that functions as a indicator lamp (turn signal lamp) and a road surface drawing unit that functions to project a drawing pattern onto the road surface.
  • the road surface drawing unit is mainly composed of a light source 30 and a lens 10.
  • Light L1 which is a part of the light emitted from the light source 30 is incident on the lens 10, and a drawing pattern M1 is formed by the emitted light to form a road surface GR. Irradiate.
  • the optical unit is mainly composed of a light source 30 and a step reflector 20, and another part of the light emitted by the light source 30 is reflected by the step reflector 20 as light L2, and the reflected light forms a light distribution LD1 of a turn signal lamp. ..
  • both units share the light source 30.
  • the optical axis A1 of the light source 30 is tilted slightly downward from the horizontal while being directed to the front right.
  • the lens 10 is arranged on the optical axis A1.
  • the light of the light source 30 is mainly incident on the lens 10 as light L1, and the others are incident on the step reflector 20 as light L2.
  • the step reflector 20 is not arranged on the optical axis A1 of the light source 30, the light distribution LD1 formed by the light emitted from the step reflector 20 has the necessary light distribution legal requirements (maximum luminous intensity, required for the turn signal lamp). (Maximum left-right angle, etc.) is configured to meet.
  • the lamp cover 50 is a transparent lens, and the emitted light of each unit is directly emitted to the front of the vehicle C through the lamp cover 50.
  • a light diffusing lens such as a cylindrical lens may be used on the lamp cover 50 to diffuse the light emitted from the optical unit.
  • the portion through which the light emitted from the road surface drawing unit passes is a through lens.
  • the step reflector 20 and the lens 10 are arranged so as to be offset in the left-right direction, and the light emitted to the right from the light source 30 is also incident on the step reflector 20 (see FIG. 2B). Note that a part of the light L2 passes to the right of the lens 10, and in FIG. 3, the light L2a passes to the right of the lens 10 (toward the front of the paper) and does not pass through the lens 10. ..
  • FIG. 4 is a side view conceptually showing the light source 30 and the lens 10.
  • the right figure of FIG. 4 is a front view of the lens 10 as viewed from the exit surface.
  • the lens 10 is arranged in a state of being slightly tilted downward with respect to the horizontal plane.
  • the light source 30 is arranged substantially on the focal point of the lens 10, and light mainly directed diagonally forward and downward (in the direction of the optical axis) from the light source 30 is incident on the lens 10 as light L1.
  • the lens 10 has an incident surface 11 on which the light L1 is incident and an exit surface 12 on which the light L1 is emitted.
  • the incident surface 11 has a substantially planar shape.
  • the emission surface 12 has a shape that is convex toward the emission direction of light.
  • the exit surface 12 of the lens 10 is formed by connecting three curved surfaces having different curvatures, and is formed by a first region 12a consisting of a curved surface located at the lower part and a second surface consisting of the most protruding curved surface located at the center. It is divided into a region 12b and a third region 12c composed of a curved surface located at the upper part. That is, the first region 12a and the second region 12b are separated by the line of intersection CL1 at which curved surfaces having different curvatures intersect, and the second region 12b and the third region 12c have curved surfaces having different curvatures. It is separated by the intersecting line CL2.
  • the line of intersection CL1 and the line of intersection CL2 have a substantially inverted V-shaped locus that is convex upward. Due to such intersection lines CL1 and CL2, the regions 12a, 12b, and 12c are all regions having a substantially inverted V shape in front view.
  • the shape of the first region 12a is a shape in which the light emitted from the region 12a is refracted so as to be substantially the same as the shape of the region 12a.
  • the first region 12a has a substantially inverted V shape. Therefore, the light L1 component emitted from the first region 12a is formed based on the substantially inverted V-shaped shape of the first region 12a, and becomes the light L1a having a substantially inverted V-shaped shape.
  • the component located in the center of the light L1 passes through the substantially central portion of the lens 10 and is emitted from the second region 12b diagonally forward and downward.
  • the shape of the second region 12b is a shape in which the light emitted from the region 12b is refracted so as to have substantially the same shape as the shape of the region 12b.
  • the second region 12b has a substantially inverted V shape. Therefore, the light L1 component emitted from the second region 12b is formed based on the substantially inverted V-shaped shape of the second region 12b, and becomes the light L1b having a substantially inverted V-shaped shape.
  • the component located above the light L1 passes through the substantially upper portion of the lens 10 and is emitted from the third region 12c diagonally forward and downward.
  • the shape of the third region 12c is a shape in which the light emitted from the region 12c is refracted so as to have substantially the same shape as the shape of the region 12c.
  • the third region 12c has a substantially inverted V shape. Therefore, the light L1 component emitted from the third region 12c is formed based on the substantially inverted V-shaped shape of the third region 12c, and becomes the light L1c having a substantially inverted V-shaped shape.
  • the drawing pattern M1 is drawn on the road surface GR a predetermined distance ahead.
  • the drawing pattern M1 includes a mark M1a in which the light L1a is projected on the road surface GR, a mark M1b in which the light L1b is projected on the road surface GR, and a mark M1c in which the light L1c is projected on the road surface GR.
  • the above-mentioned predetermined distance may be, for example, a distance of 1 m or more and 5 m or less from the vehicle C.
  • the first region 12a and the second region 12b are separated by the line of intersection CL1 where curved surfaces having different curvatures intersect. Therefore, the direction in which the light L1a emitted from the first region 12a, which is the lower region across the line of intersection CL1, is refracted, and the light L1b emitted from the second region 12b, which is the upper region across the line of intersection CL1.
  • the directions of refraction are different from each other.
  • the curved surface forming the first region 12a and the curved surface forming the second region 12b are formed in a shape in which the light L1a and the light L1b individually propagate diagonally forward and downward.
  • the curved surface of the first region 12a is formed so that the light L1a reaches the first position GRa closest to the vehicle C on the road surface GR. Further, the curved surface of the second region 12b is formed so that the light L1b reaches the second position GRb located in front of the first position GRa apart from the first position GRa. Therefore, the mark M1a drawn on the road surface GR by the light L1a and the mark M1b drawn on the road surface GR by the light L1b are individually projected onto the road surface GR apart from each other.
  • the second region 12b and the third region 12c are separated by the line of intersection CL2 where curved surfaces having different curvatures intersect. Therefore, the direction in which the light L1b emitted from the second region 12b, which is the lower region across the line of intersection CL2, is refracted, and the light L1c emitted from the third region 12c, which is the upper region across the line of intersection CL2, are refracted.
  • the directions of refraction are different from each other.
  • the curved surface forming the second region 12b and the curved surface forming the third region 12c are formed in such a shape that the light L1b and the light L1c individually propagate diagonally forward and downward.
  • the curved surface of the third region 12c is formed so that the light L1c reaches the third position GRc located in front of the second position GRb away from the second position GRb. Therefore, the mark M1b drawn on the road surface GR by the light L1b and the mark M1c drawn on the road surface GR by the light L1c are individually projected on the road surface GR apart from each other.
  • the drawing pattern M1 projected on the road surface GR includes a substantially inverted V-shaped mark M1a in which the light L1a is projected on the first position GRa and a substantially V in which the light L1b is projected on the second position GRb.
  • the character-shaped mark M1b and the substantially inverted V-shaped mark M1c formed by projecting the light L1c onto the third position GRc are arranged apart from each other in the traveling direction (see FIG. 1).
  • the drawing pattern M1 indicates a character in which the substantially inverted V-shaped marks M1a, M1b, and M1c are arranged in the traveling direction
  • the viewer of the drawing pattern M1 can see the direction in which the vehicle C is indicated by the substantially inverted V shape. Recall that you are planning to drive to.
  • the front surface of the above-mentioned first region 12a, second region 12b, and third region 12c is preferably 1: 1: 1.
  • the shape of the exit surface 12 forming such a drawing pattern M1 is preferably a shape based on a spherical surface.
  • the optical axis A1 of the lens 10 mounted on the vehicle lamp 1 on the right side is directed slightly forward and to the right (see FIGS. 2 and 3). Therefore, as shown in FIG. 1, substantially inverted V-shaped marks M1a, M1b, and M1c are projected on the road surface GR in a row at three distances in the irradiation direction with the front right side as the irradiation direction. The viewer who sees this recalls that the vehicle C changes the direction of travel to the right of the vehicle.
  • the emitted light of the common light source 30 of 1 is formed as the light distribution LD1 of the turn signal rung and is irradiated to the front of the vehicle, and is projected onto the road surface GR as the drawing pattern M1. Will be done. Since the irradiation is performed in relation to the purpose of irradiation, the functional effect is high due to the synergistic effect of the two.
  • the emitted light of the light source 30 is reflected by the step reflector 20 to form a predetermined light distribution LD1 and emitted, and as a drawing unit, the emitted light of the light source 30 is incident on the lens 10 to form a predetermined light distribution LD1. It is formed in the drawing pattern M1 and projected onto the road surface.
  • the turning on and off of both units is performed by turning on and off the common light source 30, and the turning on and off of the light distribution LD1 and the drawing pattern M1 are naturally linked. Therefore, the vehicle lamp 1 does not require complicated control as an optical unit or a road surface drawing unit.
  • the configuration is simple, and the size of vehicle lamps can be reduced.
  • FIG. 5 shows a vehicle C equipped with the vehicle lamp 101 according to the second embodiment.
  • 5 (A) is a rear perspective view
  • FIG. 5 (B) is a plan view
  • FIG. 5 (C) is a side view.
  • the vehicle lighting fixture 101 is a backup lamp attached to the upper part of the back surface of the large vehicle C.
  • the vehicle lighting tool 101 forms a light distribution LD2 of a backup lamp when the vehicle C moves backward, and blinks the light distribution LD2 to inform the driver or pedestrian of the vehicle behind the movement of the vehicle C to the rear. Close.
  • a rectangular drawing pattern M2 extending backward is formed.
  • the vehicle lighting equipment 101 is composed of a pair of left and right, and is attached to the left and right side edges of the rear surface of the vehicle. Since each vehicle lighting equipment 101 projects a rectangular drawing pattern M1 to the rear, the vehicle C to the rear. Two parallel lines of light that extend are projected as the retreat trajectory of vehicle C. As a result, pedestrians, light vehicles, and the like that may exist in the vicinity of the rear, which is the blind spot of the vehicle C, are also notified of the vehicle retreat, and attention and movement are urged.
  • the vehicle lighting tool 101 blinks the drawing pattern M2 and the light distribution LD2 at the same time to perform irradiation for the same purpose of "notifying the vehicle from moving backward", so that the irradiation effect is high.
  • FIG. 6A and 6B show a vehicle lamp 101
  • FIG. 6A is a perspective view
  • FIG. 6B is a side view.
  • the lamp cover is shown by the dotted line to show the internal configuration.
  • FIG. 7 is an exploded perspective view of the vehicle lamp 101. Since it is a backup lamp, the light irradiation direction is opposite to that of the first embodiment. Therefore, in the description of the lamp of the present embodiment, the rear side will be referred to as the front surface side and the front side will be referred to as the back surface side.
  • the backup lamp irradiates the surface side.
  • the lamp body 101 for a vehicle includes a lamp body 140, a lamp cover 150, a lens 110, a fixing member 160, and a light source 130.
  • the lamp cover 150 is a housing made of translucent resin, glass, or the like and having an open surface on one side.
  • a flat lamp body 140 is attached to the opening of the lamp cover 150, and a lamp chamber S is formed inside.
  • a light source 130 and a lens 110 are arranged in the light chamber S. Since the light-transmitting lamp cover 150 is the main body of the housing, the light diffusion angle of the vehicle lighting tool 101 can be increased, and the visible range of the irradiation light can be widened.
  • the lens 110 is a drawing lens that forms incident light into a predetermined drawing pattern, similar to the lens 10 of the first embodiment.
  • the lens 110 of the present embodiment forms incident light in a rectangular drawing pattern long in the emission direction.
  • the light source 130 emits light from the LED which is a mounted light emitting element.
  • the emitted light is white light in a range defined as backup lamp light, and a part of the emitted light is incident on the lens 110 and formed on the drawing pattern M2. Therefore, the projected drawing pattern M2 is composed of white light. Will be done.
  • a rectangular hole 141 is provided in the center of the lamp body 140, and the fixing member 160 is engaged from the back surface side (front direction in the present embodiment).
  • the fixing member 160 is a mounting member for the light source 130 and the lens 110, and includes a pedestal portion 161 whose upper side is inclined toward the surface side (rear direction in this embodiment).
  • the inclined surface on the surface side of the pedestal portion 161 is the mounting surface 162, and the light source 130 is mounted in the center of the mounting surface 162.
  • the lens 110 is fixed to the mounting surface 162 so as to sandwich the light source 130 with legs 115 extending from its side surface to the back surface side.
  • the back surface side of the fixing member 160 is a heat sink 163, and heat generated by the light source 130 is dissipated to the outside. Therefore, the fixing member 160 is made of a metal member having good thermal conductivity.
  • the fixing member 160 When the fixing member 160 is fixed to the lamp body 140, the fixing member 160 to which the lens 110 and the light source 130 are attached approaches the lamp body 140 from the back side, and the protruding lens 110 and the inclined pedestal portion 161. The upper part enters the light room S through the hole 141. Then, with the lens 110 fixed to the mounting surface 162 arranged in the lamp chamber S, the fixing member 160 is fixed to the back surface side of the lamp body 140 by the flange portion 164 provided around the outer peripheral surface.
  • FIG. 8A mainly shows the outer surface side which is the exit surface
  • FIG. 8B mainly shows the inner surface side which is the incident surface.
  • the lamp cover 150 is an optical member formed in a box shape with the inner surface side as the entrance surface and the outer surface side as the emission surface.
  • the light emitted from the light source 130 arranged in the lamp chamber S is incident from the inner incident surface, and the light based on the characteristics of each constituent surface is emitted from the outer exit surface.
  • the lamp cover 150 includes a first surface 151, a second surface 152, and a third surface 153 having different characteristics on the surface side, which is the main irradiation direction of the emitted light of the light source 130.
  • the outer surface sides of the first surface 151, the second surface 152, and the third surface 153, which are the emission surfaces, are all formed in a planar shape, and the shape of the inner surface side, which is the entrance surface, is different for each surface.
  • the first surface 151 constitutes an upper region in the center of the surface of the lamp cover 150.
  • the incident surface 151a of the first surface 151 has a form in which small convex surfaces are arranged in a matrix. The light incident on the first surface 151 configured in this way is emitted from the exit surface while being diffused in all directions.
  • the second surface 152 is located below the first surface 151. While the first surface 151 and the third surface 153 are vertical surfaces, the second surface 152 is an inclined surface whose lower surface is inclined toward the back surface side.
  • the incident surface 152a of the second surface 152 is a flat surface. The light incident on the second surface 152 thus configured is emitted from the emitting surface in the incident form.
  • the third surface 153 is arranged on the left and right sides of the first surface 151 and the second surface 152, and constitutes a lateral region of the surface of the lamp cover 150.
  • the third surface 153 extends vertically in the vertical direction, and the side edge side is inclined toward the back surface side with respect to the first surface 151 in the horizontal direction. That is, the third surface 153 arranged on the right side faces to the right, and the third surface 153 arranged on the left side faces to the left.
  • the incident surface 153a of the third surface 153 has a V-shaped groove extending vertically. The light incident on the third surface 153 configured in this way is diffused to the left and right and emitted from the exit surface.
  • FIG. 9 is a schematic vertical sectional view for explaining an optical path of light emitted from a light source 130.
  • both the attached lens 110 and the light source 130 are tilted from the vertical to the surface side. That is, the optical axis A2 of the light source 130 is tilted downward from the horizontal, and the lens 110 and the second surface 152 of the lamp cover 150 are arranged on the tilted optical axis A2. Therefore, the light emitted from the light source 130 is mainly incident on the lens 110 as light L3, and the light other than the light L3 and mainly the light emitted upward is incident on the first surface 151 of the lamp cover 150 as light L4. do.
  • the vehicle lighting tool 101 includes an optical unit that functions as a marker lamp (backup lamp) and a road surface drawing unit that functions to project a drawing pattern onto the road surface.
  • an optical unit that functions as a marker lamp (backup lamp) and a road surface drawing unit that functions to project a drawing pattern onto the road surface.
  • the road surface drawing unit is mainly composed of a light source 130 and a lens 110.
  • the second surface 152 is a lens having both surfaces planar, and in order to allow incident light to pass through, the light L3 is formed in a rectangular shape by the lens 110 and is applied to the road surface GR as a drawing pattern M2.
  • the optical unit is composed of a light source 130 and a lamp cover 150.
  • the lamp cover 150 particularly the first surface 151 and the third surface 153 are used as optical units.
  • the light emitted by the light source 130 a part different from the light L3, particularly the light emitted above the optical axis A2, is incident on the lamp cover 150 as L4, diffused and emitted, and the light distribution LD2 of the backup lamp.
  • L4 diffused and emitted
  • light emitted from the light source 130 in the left-right direction which is not shown in FIG. 9, is incident on the third surface 153, diffused left and right, and emitted to form a part of the light distribution LD2.
  • the light distribution LD2 is formed by the light emitted from the surfaces other than the second surface 152.
  • the optical unit and the road surface drawing unit share the light source 130.
  • the light of the light source 130 is mainly incident on the lens 110 as light L3, is irradiated on the road surface GR as a drawing pattern M2 via the second surface 152, and light other than the light L3 is incident on the lamp cover 150 as light L4.
  • the light distribution LD2 formed by the lamp cover 150 is configured to satisfy the necessary light distribution legal requirements (maximum luminous intensity, maximum left-right angle, etc.) required for the backup lamp.
  • a light diffusing lens is mainly used on the first surface 151 and the third surface 153 of the lamp cover 150 to form an optical unit component, but the second surface 152 on the optical axis A2 is excluded. All the constituent surfaces of the lamp cover 150, that is, the surface 154 which is the peripheral side surface adjacent to the first surface 151, the second surface 152, and the third surface 153, is also irradiated with the light distribution LD2 by using the light diffusing lens. You may expand the range.
  • a vehicle with a simple configuration and high functional effect by using a reflective or direct-illumination type lamp unit with a reflector, using the emitted light of a part of the light source as a drawing pattern, and using the remaining emitted light for forming a light distribution.
  • a reflective or direct-illumination type lamp unit with a reflector using the emitted light of a part of the light source as a drawing pattern, and using the remaining emitted light for forming a light distribution.
  • the optical axis A1 of the light source 30 faces downward, and the inclination angle from the horizontal plane is an angle ⁇ 1.
  • the step reflector 20 forming the light distribution LD1 is arranged below the lens 10.
  • the optical axis A2 of the light source 130 faces downward, and the inclination angle from the horizontal plane is an angle ⁇ 2.
  • the second surface 152 of the lamp cover 150 that mainly forms the light distribution LD2 is located above the lens 110.
  • the drawing pattern is projected near the vehicle, and if the tilt angle of the optical axis is small, the drawing pattern drawn on the road surface is the vehicle. It is projected far from.
  • the tilt angles of the optical axes are the same, the higher the mounting height of the vehicle lighting equipment, the longer the projection distance, the drawing pattern is projected farther from the vehicle, and the lower the mounting height, the shorter the projection distance and drawing. The pattern is projected near the vehicle.
  • the drawing pattern projected on the road surface has a high luminous intensity in order to clarify the shape. Therefore, the optical member forming the drawing pattern is arranged on the optical axis, and the light having a high luminous intensity emitted mainly from the front of the light source is mainly used for forming the drawing pattern, and other light is formed as the light distribution.
  • the position where the vehicle lamp 1 which is a front turn signal lamp is attached is relatively low near the bumper, and when the angle ⁇ 1 is increased, the drawing pattern M1 drawn on the road surface GR is only in the vicinity of the vehicle C, so be careful of the surroundings. Can't be drawn. Since the drawing pattern M1 is projected at a distance away from the vehicle to some extent, the angle ⁇ 1 is relatively small. Since the angle of inclination of the optical axis A1 of the light source 30 from the horizontal plane is small, the lens 10 forming the drawing pattern M1 is arranged near the horizontal plane, and the step reflector 20 is relatively arranged below the lens 10. Therefore, the step reflector 20 mainly uses the light emitted below the optical axis A1 to form the light distribution LD1.
  • the vehicle lighting fixture 101 which is a backup lamp
  • the mounting position is relatively high.
  • a rectangular drawing pattern M2 extending long from the vicinity of the vehicle to a distant place is projected.
  • the lens 110 forming the drawing pattern M2 is arranged below the horizontal plane, and the second surface 152 that mainly forms the light distribution LD2 is a lens. It is placed above 110. Therefore, the second surface 152 mainly uses the light emitted above the optical axis A2 to form the light distribution LD2.
  • the drawing unit when the height at which the vehicle lamp is attached to the vehicle is relatively high, the drawing unit is arranged above the optical unit, and when the height attached to the vehicle is relatively low, the drawing unit is an optical unit. It is preferably placed below. More specifically, when the mounting height of the shared light source is relatively high, the optical member that forms the drawing pattern provided in the drawing unit is below the optical member that forms and irradiates the light distribution provided in the optical unit. It is preferable to be arranged in. If the height at which the vehicle lamps are mounted is relatively low, the preferred arrangement is reversed. As a result, a clear and bright drawing pattern is drawn on the road surface, and the light emitted from the surplus light source can be effectively used to form a light distribution. In addition, the overall size can be reduced by appropriately arranging each unit.
  • the arrangement of the drawing unit and the optical unit is determined in consideration of not only the mounting height but also the tilt angle. For example, when the drawing pattern is projected relatively far, the tilt angle is set small.
  • the drawing unit is arranged above and the optical unit is arranged below.
  • the drawing unit may be arranged on the left or right side of the optical unit.
  • the arrangement of the light source is the most important, then the arrangement of the optical members of the drawing unit forming the drawing pattern is determined, and finally the light distribution is formed.
  • the arrangement of the optical light source of the drawing unit is determined. In this way, once the relative arrangement of the optical unit with the road surface drawing unit is determined according to the height at which the light source is arranged and the tilt angle of the optical axis, the optical unit can be optimally arranged as a whole. Each irradiation can be made appropriate.
  • FIG. 10 is a modified example of the light source 130.
  • the light sources 130A and 130B each use three light emitting elements 131 in order to improve the brightness.
  • three light emitting elements 131 are juxtaposed horizontally, and in the light source 130B, three light emitting elements 131 are juxtaposed vertically.
  • the width of the light source image is widened, which is suitable for a wide drawing pattern.
  • the light source 130A is suitable for the first embodiment.
  • the light source 130B is suitable for the second embodiment.
  • the light source 131B for the vehicle lamp 101, it is possible to project a vertically long line-shaped drawing pattern M2 having a clear outer shape.
  • FIG. 11 is a modified example of the road surface drawing unit of the vehicle lamp 101.
  • the road surface drawing unit is mainly composed of a light source 130, a condenser lens 116, a shade 117, and a projection lens 118.
  • the condenser lens 116 is a collimating lens, and the emitted light of the light source 130 is emitted to the shade 117 as parallel light.
  • the shade 117 has a slit 117a in the shape of a desired drawing pattern, and the light L3'passed through the slit is projected onto the road surface as a desired drawing pattern by the projection lens 118.
  • the road surface drawing unit is mainly composed of a light source 130 and three drawing lenses 119.
  • the drawing lens 119 has a circular outer shape, and the incident light is formed into a simple circular drawing pattern and emitted.
  • the light L31, the light L32, and the light L33 emitted from the three drawing lenses 119 are each formed as a circular drawing pattern. Therefore, a continuous circular drawing pattern is projected on the road surface. In this way, the lens itself can be shaped like a drawing pattern, and a plurality of lenses may be used to form one drawing pattern.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Marketing (AREA)
  • Theoretical Computer Science (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
PCT/JP2021/028362 2020-08-04 2021-07-30 路面描画機能を備えた車両用灯具 WO2022030387A1 (ja)

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JP2020-132448 2020-08-04
JP2020132448A JP2022029215A (ja) 2020-08-04 2020-08-04 路面描画機能を備えた車両用灯具

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019018681A (ja) * 2017-07-14 2019-02-07 スタンレー電気株式会社 車両用灯具

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019018681A (ja) * 2017-07-14 2019-02-07 スタンレー電気株式会社 車両用灯具

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