JP2019079655A - Vehicular lighting fixture - Google Patents

Abstract

To provide a vehicular lighting fixture capable of improving in visibility.SOLUTION: A vehicular lighting fixture 1 provided in a vehicle 100 capable of traveling at a corner by tilting the vehicle body in a turning direction comprises first lamps 23L, 23R which irradiate rear sides of the vehicle 100 with light, and second lamps 25L, 25R which are arranged on the front side of the vehicle 100 more than the first lamps 23L, 23R and irradiate a rear side of the vehicle 100 with light. The first lamps 23L, 23R have a light source 41 and light guide bodies 43L, 43R which diffuse the light emitted from the light source 41, and the light guide bodies 43L, 43R are composed at least partially of transparent members or light-transmissive members, so that the second lamps 25L, 25R can be viewed through the first lamps 23L, 23R.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle lamp.

  A tail lamp for a two-wheeled vehicle, including a taillight, is known in Patent Document 1 and the like.

Unexamined-Japanese-Patent No. 5-20905 gazette

  The rear lamp mounted on a motorcycle or the like may be configured as a rear combination lamp having a plurality of marker lights such as a tail lamp, a stop lamp, and a turn signal lamp. It is required to improve the visibility of the rear combination lamp from the rear (for example, a succeeding vehicle or a pedestrian) of the host vehicle.

  An object of the present invention is to provide a vehicular lamp capable of improving visibility.

In order to achieve the above object, the vehicle lamp of the present invention is
A vehicle lamp provided to a vehicle capable of traveling in a corner by inclining a vehicle body in a direction of bending,
A first lamp for emitting light to the rear of the vehicle; and a second lamp for emitting light to the rear of the vehicle disposed in front of the vehicle than the first lamp,
The first lamp includes a light source and an optical member that diffuses the light emitted from the light source.
When at least a part of the optical member is formed of a transparent member or a member having a light transmitting property, the second lamp can be seen through the first lamp.

  According to the vehicle lamp of the present disclosure, the second lamp is configured such that at least a portion of the first lamp disposed at the rear of the vehicle than the second lamp is made of a transparent member or a light transmitting member. It is configured to be visible through the first lamp. Thereby, the visibility of the second lamp can be secured from any direction behind the vehicle.

  The optical member may be formed in a plate shape.

  According to this configuration, the visibility of the second lamp can be reliably ensured.

The optical member has a first light emitting area for diffusing light of the light and a non-light emitting area for non-diffusing light of the light;
The optical member may be configured such that a stripe pattern is formed by alternately arranging the first light emitting area and the non-light emitting area.

  According to this configuration, it is possible to provide the first lamp having a novel design, while securing the visibility of the second lamp.

  The first light emitting region may be made of a material including a light diffusing material.

  According to this configuration, the first light emitting region can be easily formed.

The optical member further includes a second light emitting region disposed at the outer edge thereof and made of a material including a light diffusing material,
The emission intensity of the second emission region may be higher than the emission intensity of the first emission region.

  According to this configuration, at the time of lighting of the first lamp, it is possible to exhibit novel design while maintaining the function as the marker lamp of the first lamp.

The first lamp functions as a tail lamp or a stop lamp,
The second lamp may function as a turn signal lamp.

  According to this configuration, it is possible to provide a vehicular lamp as a highly innovative and novel combination lamp.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle lamp which can improve visibility can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially expanded perspective view of the vehicle provided with the vehicle lamp which concerns on embodiment of this invention. It is a block diagram of the vehicle lamp of FIG. It is an upper surface side perspective view of the vehicle lamp of FIG. It is a lower surface side perspective view of the vehicle lamp of FIG. It is a top view of the vehicle lamp of FIG. It is a left view of the vehicle lamp of FIG. FIG. 2 is a left side perspective view of the vehicle lamp of FIG. 1; It is a flowchart for demonstrating an example of lighting control of a road surface drawing lamp. It is a schematic diagram for demonstrating an example of lighting control of a road surface drawing lamp.

  Embodiments of the present invention will be described with reference to the drawings. In the present embodiment, “left and right direction”, “front and back direction”, and “up and down direction” are relative directions set for the convenience of description of the vehicle shown in FIG. 1. The “front-rear direction” is a direction including the “front direction” and the “rear direction”. The “left and right direction” is a direction including “left direction” and “right direction”. The “up and down direction” is a direction including “upward direction” and “downward direction”.

  FIG. 1 shows a motorcycle 100 as an example of a vehicle according to the present embodiment. The motorcycle 100 is a vehicle that can travel along a corner of a road (curve) by inclining the vehicle body in the direction of bending. The vehicle according to the present embodiment may be a vehicle capable of traveling in a corner by inclining the vehicle body in the direction of bending like the motorcycle 100, and the number of wheels is not limited. Therefore, even if it is, for example, a three-wheeled motor vehicle, a four-wheeled motor vehicle, etc., it is included in the vehicle of the present embodiment as long as it can travel in the same manner as the motorcycle 100.

  As shown in FIG. 1, the motorcycle 100 has a vehicular lamp 1 at its rear portion. As shown in FIG. 2, the vehicle lamp 1 comprises a rear combination lamp unit 2 capable of irradiating the rear of the vehicle, a road surface drawing lamp 4 capable of forming a road surface drawing pattern on the road surface behind the vehicle, and a rear combination lamp unit And a lighting control unit 5 for controlling the operation of the road surface drawing lamp 4.

  The rear combination lamp unit 2 has, for example, a left stop lamp 21L, a right stop lamp 21R, a left tail / stop lamp 23L, a right tail / stop lamp 23R, a left turn signal lamp 25L, and a right turn signal lamp 25R. It consists of

  The road surface drawing lamp 4 has a configuration for projecting (irradiating) a predetermined drawing pattern on the road surface around the motorcycle 100. Examples of the road surface drawing lamp 4 include a projector. In this example, the road surface drawing lamp 4 can form a predetermined road surface drawing pattern (for example, the road surface drawing pattern P of FIG. 9) on the road surface at the rear of the motorcycle 100.

  The illumination control unit 5 is connected to a rear combination lamp unit 2 and a road surface drawing lamp 4 and a bank angle sensor 6 for detecting an inclination state (bank angle) of the motorcycle 100, and environmental information outside the vehicle. The external sensor 7 (an example of a detection part) which detects is connected. Furthermore, a speed sensor 8 or the like for detecting the speed of the motorcycle 100 is connected to the illumination control unit 5. The lighting control unit 5, the bank angle sensor 6, the external sensor 7, and the speed sensor 8 are mounted at predetermined positions of the vehicle body of the motorcycle 100. The illumination control unit 5 may be realized as one function of an integrated control unit (vehicle ECU (Electronic Control Unit)) mounted on the motorcycle 100, or the light of the rear combination lamp unit 2 or the road surface drawing lamp 4 It may be realized as one function of the control device disposed in the room.

The illumination control unit 5 is configured of, for example, at least one electronic control unit (ECU). The electronic control unit may include at least one microcontroller including one or more processors and one or more memories, and other electronic circuitry including active and passive elements such as transistors. The processor is, for example, a central processing unit (CPU), a micro processing unit (MPU), a graphics processing unit (GPU) and / or a tensor processing unit (TPU). The CPU may be configured by a plurality of CPU cores. The GPU may be configured by a plurality of GPU cores. The memory includes a ROM (Read Only Memory) and a RAM (Random Access Memory). A vehicle control program may be stored in the ROM. For example, the vehicle control program may include an artificial intelligence (AI) program for autonomous driving. An AI program is a program constructed by supervised or unsupervised machine learning using a neural network such as deep learning. The RAM may temporarily store a vehicle control program, vehicle control data, and / or surrounding environment information indicating a surrounding environment of the vehicle. The processor may be configured to expand a program specified from a vehicle control program stored in the storage device or the ROM on the RAM, and to execute various processes in cooperation with the RAM.
Further, the electronic control unit may be configured by an integrated circuit (hardware resource) such as an application specific integrated circuit (ASIC) or a field-programmable gate array (FPGA). Furthermore, the electronic control unit may be constituted by a combination of at least one microcontroller and an integrated circuit.

  The bank angle sensor 6 is a sensor capable of detecting an inclination angle when the vehicle body of the motorcycle 100 is inclined to the left and right with respect to the vertical line. The bank angle sensor 6 is configured of, for example, a gyro sensor. Note that the tilt angle of the vehicle body may be calculated based on an image captured by a camera mounted on the motorcycle 100.

  The external sensor 7 includes environmental information on the outside of the motorcycle 100 including the surrounding environment of the motorcycle 100 (for example, obstacles, other vehicles (front vehicles, oncoming vehicles, following vehicles), pedestrians, road shapes, traffic signs, etc.) It is a sensor that can be acquired. The external sensor 7 is configured of, for example, at least one of LiDAR, a camera, a radar, and the like.

LiDAR is an abbreviation of Light Detection and Ranging or Laser Imaging Detection and Ranging. Generally, LiDAR is a sensor that emits non-visible light in front of it and acquires information such as the distance to an object, the shape of an object, the material of an object, the color of an object, and the like based on the emitted light and return light.
The camera is, for example, a camera including an imaging device such as a charge-coupled device (CCD) or a complementary MOS (CMOS). The camera includes a camera that detects visible light and an infrared camera that detects infrared light.
The radar includes millimeter wave radar, microwave radar, laser radar and the like.

  Each information detected by the bank angle sensor 6, the external sensor 7 and the speed sensor 8 is transmitted to the illumination control unit 5. The lighting control unit 5 controls the operation of each lamp of the rear combination lamp unit 2 and the road surface drawing lamp 4 based on the information transmitted from each of the sensors 6 to 8. For example, the illumination control unit 5 controls the lamps of the rear combination lamp unit 2 based on the detection information of the sensors 6 to 8 and adjusts the illumination pattern viewed from the periphery (especially the rear) of the motorcycle 100. It is possible. Furthermore, the lighting control unit 5 can control the road surface drawing lamp 4 based on the detection information of the sensors 6 to 8 and adjust the road surface drawing pattern formed on the road surface behind the motorcycle 100. is there.

FIG. 3 is a top perspective view of the vehicle lamp 1 mounted on the motorcycle 100 of FIG. 1, and FIG. 4 is a bottom perspective view of the vehicle lamp 1. 5 is a top view of the vehicular lamp 1, and FIG. 6 is a left side view of the vehicular lamp 1. As shown in FIG.
As shown in FIGS. 3 to 6, at the rear of the motorcycle 100, a projecting portion 103 is provided which protrudes rearward from the tandem seat 101. A camera 7A and a LiDAR 7B are mounted on the rear end side of the projecting portion 103 as an example of the external sensor 7. That is, environmental information on the rear side of the motorcycle 100 can be acquired by the camera 7A and the LiDAR 7B.

  At the rear of the motorcycle 100, first cowls 105L and 105R and second cowls 107L and 107R are provided as vehicle body covers for reducing air resistance.

  The pair of left and right first cowls 105L and 105R are attached to the lower side of the tandem seat 101 and arranged to extend upward and obliquely rearward. As shown in FIG. 4, the left first cowl 105L is located on the left side of the projecting portion 103 on which the camera 7A and the LiDAR 7B are mounted in the rear view of the vehicle, the left tail / stop lamp 23L of the rear combination lamp unit 2 described later. The left turn signal lamp 25L is formed in a curved shape so as to form a locatable space. In addition, the first cowl 105R on the right side forms a space where the right tail / stop lamp 23R and the right turn signal lamp 25R of the rear combination lamp unit 2 can be disposed on the right side of the projecting portion 103 in the rear view of the vehicle. Is formed in a curved shape.

  The pair of left and right second cowls 107L and 107R are respectively disposed outside the bent portions 105L1 and 105R1 of the first cowls 105L and 105R formed in a substantially L shape in a top view of the vehicle. The left second cowl 107L is configured of a first region 107L1 extending in the vertical direction and a second region 107L2 extending in the front-rear direction from the upper end of the first region 107L1. The second cowl 107R on the right side is configured of a first region 107R1 extending in the vertical direction and a second region 107R2 extending in the front-rear direction from the upper end of the first region 107R1.

  On the rear end faces of the left and right first cowls 105L and 105R, light emitting units constituted by light sources and light guides (not shown) are respectively provided, and the light emitting units are respectively used as the left stop lamp 21L and the right stop lamp 21R. Function.

  A left tail / stop lamp 23L and a right tail / stop lamp 23R are disposed on the left side and the right side of the protrusion 103, respectively. The left tail / stop lamp 23L and the right tail / stop lamp 23R are a plurality of light sources 41 (the light source of the right tail / stop lamp 23R is not shown) and a light guide for diffusing the light emitted from the plurality of light sources 41. 43 L and 43 R (an example of an optical member) are respectively provided. As shown by broken lines in FIG. 4, the plurality of light sources 41 are provided inside the projecting portion 103. As the light source 41, a lamp light source or a light emitting element can be used. Examples of lamp light sources include incandescent lamps, halogen lamps, discharge lamps, and neon lamps. A light emitting diode, a laser diode, an organic EL element etc. are mentioned as an example of a light emitting element.

  The light guides 43L and 43R are formed as substantially rectangular flat plates, and are disposed so as to protrude from the projecting portion 103 in the left-right direction. The light guides 43L, 43R are made of a transparent resin material. Examples of resin materials used for the light guides 43L and 43R include transparent thermoplastic resins or thermosetting resins such as polycarbonate resins and acrylic resins.

  The light guides 43L and 43R have first light emitting areas 43L1 and 43R1 for diffusing light emitted from the light source 41 and non-light emitting areas 43L2 and 43R2 for not diffusing light emitted from the light source 41. ing. The light guides 43L and 43R are configured such that stripe-shaped first light emitting areas 43L1 and 43R1 and band-shaped non-light emitting areas 43L2 and 43R2 are alternately arranged. The first light emitting regions 43L1 and 43R1 are made of, for example, a resin material having a light transmitting property and including a light diffusing material for diffusing the light emitted from the light source 41. Thereby, the first light emitting regions 43L1 and 43R1 can diffuse and emit the light emitted from the light source 41. As a light diffusing material, a titanium dioxide particle can be mentioned, for example. In addition, since the light diffusion material is not contained in the non-light emitting regions 43L2 and 43R2, the light emitted from the light source 41 is not diffused.

  The light guides 43L and 43R further include second light emitting regions 43L3 and 43R3 disposed at the outer edge thereof and including a light diffusing material. The light diffusing material contained in the second light emitting regions 43L3 and 43R3 is set so that the density thereof is higher than the density of the light diffusing material contained in the first light emitting regions 43L1 and 43R1. The emission intensities of the second emission regions 43L3 and 43R3 are configured to be higher than the emission intensities of the regions 43L1 and 43R1.

  In the first regions 107L1 and 107R1 of the left and right second cowls 107L and 107R, light emitting units constituted by light sources and light guides (not shown) are respectively provided, and the light emitting units are the left turn signal lamp 25L and the right It functions as a turn signal lamp 25R. That is, the left turn signal lamp 25L is disposed on the vehicle front side with respect to the light guide 43L that exhibits the function as the left tail / stop lamp 23L. Similarly, the right turn signal lamp 25R is disposed on the vehicle front side with respect to the light guide 43R that exhibits the function as the right tail / stop lamp 23R.

  A road surface drawing lamp 4 is disposed on the lower surface of the projecting portion 103. For example, as shown in FIG. 9, the road surface drawing lamp 4 can form a fan-shaped road surface drawing pattern P by irradiating a plurality of belt-like lines on the road surface behind the motorcycle 100. The mounting position of the road surface drawing lamp 4 may be any position at which the road surface drawing pattern P can be formed on the road surface behind the motorcycle 100, and is not limited to the position exemplified in this embodiment. .

  The illumination control unit 5 is configured to change the illumination state of the lamps 21L, 21R, 23L, 23R, 25L, 25R of the rear combination lamp unit 2 and the road surface drawing lamp 4 according to the state of the motorcycle 100. ing. For example, the lighting control unit 5 lights the left stop lamp 21L, the right stop lamp 21R, the left tail / stop lamp 23L, and the right tail / stop lamp 23R based on the brake control of the driver of the motorcycle 100. It may be configured. In addition, the lighting control unit 5 may be configured to light one of the left turn signal lamp 25L and the right turn signal lamp 25R based on the direction instruction input of the driver of the motorcycle 100. In addition, the lighting control unit 5 simultaneously with the lighting timing of each lamp of the rear combination lamp unit 2 or in conjunction with the lighting timing of each lamp of the rear combination lamp unit 2, the road surface drawing pattern P with the road surface drawing lamp 4 It may be configured to be formed on top.

  As described above, the vehicular lamp 1 according to the present embodiment includes the left and right tail / stop lamps 23L and 23R (an example of the first lamp) for emitting light to the rear of the motorcycle 100, and the left and right tails / stops. The left and right turn signal lamps 25L, 25R (one example of the second lamps) which are disposed in front of the motorcycle 100 with respect to the lamps 23L, 23R and irradiate light to the rear of the motorcycle 100 are provided. The tail / stop lamps 23L and 23R have a light source 41 and light guides 43L and 43R for diffusing the light emitted from the light source 41. And since the light guides 43L, 43R are made of transparent members, the turn signal lamps 25L, 25R can be seen through the light guides 43L, 43R of the tail / stop lamps 23L, 23R. Is configured as. According to this configuration, as shown in FIG. 4 and FIG. 7, the light guides 43L and 43R are disposed even in the direction in which the tail / stop lamps 23L and 23R are disposed on the front side of the turn signal lamps 25L and 25R. It is possible to recognize that the turn signal lamps 25L and 25R are lit. That is, the visibility of the turn signal lamps 25L, 25R can be secured from any direction behind the vehicle.

  Further, since the light guides 43L, 43R of the tail / stop lamps 23L, 23R are formed in a plate shape, the visibility of the turn signal lamps 25L, 25R can be reliably ensured. In the above example, the light guides 43L and 43R of the tail / stop lamps 23L and 23R are made of transparent members, but the light transmitting properties of the turn signal lamps 25L and 25R are visible and visible. You may be comprised from the member (for example, translucent member) which it has. In the above example, the entire light guides 43L, 43R are made of transparent members, but as long as the turn signal lamps 25L, 25R can be seen through the light guides 43L, 43R, A part of light guide 43L, 43R may be comprised from a non-transparent member.

  Further, in the light guides 43L and 43R, first light emitting areas 43L1 and 43R1 for diffusing light emitted from the light source 41 and non-light emitting areas 43L2 and 43R2 for non-diffusing light emitted from the light source 41 are alternately arranged. Are arranged to form a stripe pattern. As a result, it is possible to provide the tail / stop lamps 23L and 23R with novel design while securing the visibility of the turn signal lamps 25L and 25R.

  The light guides 43L and 43R further include second light emitting regions 43L3 and 43R3 disposed on the outer edge thereof and made of a material including a light diffusing material, and the light emitting intensities of the first light emitting regions 43L1 and 43R1 Also, the light emission intensity of the second light emitting regions 43L3 and 43R3 is configured to be high. Thus, by causing the second light emitting regions 43L3 and 43R3 to emit light and maintaining the function of the tail / stop lamps 23L and 23R as a marker lamp, the first light emitting regions 43L1 and 43R1 forming the stripe pattern emit light. Tail / stop lamps 23L and 23R with novel design can be provided.

Next, an example of the lighting control process of the road surface drawing lamp 4 according to the present embodiment will be described with reference to FIGS. 8 and 9.
First, the illumination control unit 5 receives a detection signal from the external sensor 7 (for example, the camera 7A and the LiDAR 7B disposed on the rear end face of the protrusion 103), and acquires environmental information around the motorcycle 100 (step S10).

  Next, based on the environmental information acquired in step S10, the lighting control unit 5 determines that the inter-vehicle distance between the motorcycle 100 as the host vehicle and the object (for example, the following vehicle V in FIG. 9) is less than the first distance. It is determined whether or not (step S12). The first distance is, for example, about 7 to 10 m. When it is determined in step S12 that the inter-vehicle distance is equal to or less than the first distance (Yes in step S12), the illumination control unit 5 causes the road surface drawing lamp 4 to be continuously lit (step S14). As a result, a fan-shaped road surface drawing pattern P composed of a plurality of strip lines is continuously irradiated on the road surface on the rear side of the motorcycle 100 (see FIG. 9).

  Next, the lighting control unit 5 determines whether the inter-vehicle distance between the motorcycle 100 and the following vehicle V is equal to or less than a second distance (step S16). The second distance is, for example, about 4 to 7 m. When it is determined in step S16 that the inter-vehicle distance is equal to or less than the second distance (Yes in step S16), the illumination control unit 5 blinks the road surface drawing lamp 4 (step S18). As a result, the road surface drawing pattern P is flashed and irradiated.

  Next, the lighting control unit 5 determines whether the inter-vehicle distance is equal to or less than the second distance (step S20). When it is determined in step S20 that the inter-vehicle distance is not equal to or less than the second distance (that is, the inter-vehicle distance is longer than the second distance) (No in step S20), the illumination control unit 5 draws the road surface. The lamp 4 is turned on continuously (step S22). As a result, the road surface drawing pattern P is continuously irradiated again.

  Next, the lighting control unit 5 determines whether the inter-vehicle distance is equal to or less than the first distance (step S24). When it is determined in step S24 that the inter-vehicle distance is not equal to or less than the first distance (that is, the inter-vehicle distance is longer than the first distance) (No in step S24), the illumination control unit 5 continuously emits light. The road surface drawing lamp 4 is turned off (step S26). Thus, the road surface drawing pattern P disappears. Thereafter, the illumination control unit 5 returns the process to step S12.

  As described above, the vehicle lamp 1 according to the present embodiment includes the road surface drawing lamp 4 that forms the road surface drawing pattern P on the road surface behind the motorcycle 100 and the outside that detects the following vehicle V of the motorcycle 100. A sensor 7 (for example, a camera 7A and a LiDAR 7B) and an illumination control unit 5 that controls the road surface drawing lamp 4 are provided. Then, based on the detection information (an example of the first detection information) regarding the succeeding vehicle V acquired from the external sensor 7, the illumination control unit 5 determines, for example, the distance between the two-wheeled vehicle 100 and the following vehicle V For example, the road surface drawing lamp 4 is controlled so as to form the road surface drawing pattern P when the distance becomes equal to or less than the first distance). According to this configuration, when the inter-vehicle distance between the motorcycle 100 and the following vehicle V becomes short, the road surface drawing pattern P is formed on the road surface at the rear of the motorcycle 100. The approach to 100 can be notified. Thus, the driver of the following vehicle V can be urged to appropriately secure the inter-vehicle distance with the motorcycle 100.

  The road surface drawing pattern formed on the road surface around the motorcycle 100 is not limited to the shape of the road surface drawing pattern P shown in FIG. For example, a road surface drawing pattern may be formed which includes information on the inter-vehicle distance (for example, "close attention!" Or "inter-vehicle distance: m m"). Thus, the driver of the succeeding vehicle V can easily recognize that the road surface drawing pattern is for promoting securing of the inter-vehicle distance.

  In the above embodiment, the road surface drawing lamp 4 is disposed at the rear of the motorcycle 100 (in the vicinity of the rear combination lamp unit 2), and the light emitted from the road surface drawing lamp 4 Although the road surface drawing pattern P is formed on the road surface, it is not limited to this example. A road surface drawing lamp is provided at the front or side of the motorcycle 100, and the distance between the motorcycle 100 and an object in front of or at the side of the vehicle (for example, preceding vehicle, parallel vehicle, oncoming vehicle, pedestrian, etc.) When the distance is smaller than or equal to a predetermined distance, a predetermined road surface drawing pattern may be formed on the road surface in front of or on the side of the motorcycle 100. With this configuration, it is possible to notify the driver of the vehicle around the motorcycle 100 and pedestrians of the approach with the motorcycle 100, and also for the driver of the motorcycle 100 to approach the surrounding object. It can be informed.

  Further, the illumination control unit 5 is configured to change the display mode of the road surface drawing pattern P in accordance with the inter-vehicle distance between the motorcycle 100 and the following vehicle V. Specifically, the illumination control unit 5 sets a plurality of threshold values (first distance and second distance) in the inter-vehicle distance between the motorcycle 100 and the following vehicle V, and the inter-vehicle distance is first The road surface drawing pattern P is continuously irradiated on the road surface when it is less than the distance, and the road surface drawing pattern P is blinked and irradiated when the inter-vehicle distance is less than the second distance. In this way, it is possible to more effectively alert the driver of the following vehicle V using the road surface drawing pattern P. Note that the illumination control unit 5 may gradually irradiate (sequential light emission) a plurality of strip-shaped lines constituting the road surface drawing pattern P, instead of blinking and irradiating the entire road surface drawing pattern P. In addition, the illumination control unit 5 may be configured to change the shape of the road surface drawing pattern to a shape different from the road surface drawing pattern P when the inter-vehicle distance is equal to or less than the second distance.

  In addition, the illumination control unit 5 may be configured to be able to acquire detection information (an example of second detection information) different from the detection information on the following vehicle V. The second detection information preferably includes at least one of information on the vehicle speed of the motorcycle 100, information on a change in the vehicle speed of the motorcycle 100, and information on the weather. Thus, the lighting control unit 5 adds the other conditions other than the inter-vehicle distance between the motorcycle 100 and the following vehicle V to form the road surface drawing pattern P, thereby providing the driver of the following vehicle V with Effective alerting can be performed. For example, when the motorcycle 100 is traveling at a high speed, when the motorcycle 100 applies a sudden brake, and in a situation where it is important to secure an inter-vehicle distance such as bad weather, the timing of irradiation of the road surface drawing pattern P is advanced. It is preferable to form a road surface drawing pattern P with high visibility from the driver of the following vehicle V. Therefore, by setting the first distance, which is the threshold value for the inter-vehicle distance, to a longer distance than usual (for example, about 10 to 13 m) based on the second detection information, it is important to ensure the inter-vehicle distance. In the above, the driver of the following vehicle V can be reliably alerted. Also, instead of changing the setting of the first distance, or in addition to changing the setting of the first distance, the road surface drawing lamp 4 blinks when the inter-vehicle distance is equal to or less than the first distance. The road surface drawing pattern P may be flashed and irradiated.

  In addition, the illumination control unit 5 turns on the road surface drawing lamp 4 according to the first detection information to form the road surface drawing pattern P on the road surface, and according to the input instruction of the driver of the motorcycle 100. It is preferable to have a second mode in which the road surface drawing lamp 4 is turned on to form the road surface drawing pattern P on the road surface. As described above, the lighting control unit 5 has the second mode in which the road surface drawing pattern P can be formed based on the input instruction of the driver of the motorcycle 100, so that the driver can transmit to the following vehicle V. The road surface drawing pattern P can be appropriately formed even when it is determined that attention is required.

  In the above embodiment, the first detection information on an object (for example, the following vehicle V) around the vehicle is acquired by the external sensor 7 configured by at least one of LiDAR, a camera, a radar, etc. Not limited to this example. For example, the lighting control unit 5 may acquire the first detection information using road-to-vehicle communication with the base station apparatus or inter-vehicle communication with another vehicle's on-board unit. In addition, the illumination control unit 5 may acquire the first detection information by combining the detection signal from the external sensor 7 with the road-vehicle communication or the inter-vehicle communication. As described above, various types of detection information can be acquired by using road-to-vehicle communication or vehicle-to-vehicle communication.

  The order of processing defined in each step shown in FIG. 8 is merely an example, and the order of these steps can be changed as appropriate.

  Although the embodiments of the present invention have been described above, it goes without saying that the technical scope of the present invention should not be interpreted in a limited manner by the description of the present embodiments. It is understood by those skilled in the art that the present embodiment is merely an example, and that modifications of various embodiments are possible within the scope of the invention described in the claims. The technical scope of the present invention should be determined based on the scope of the invention described in the claims and the scope of equivalents thereof.

1: Vehicle lamp, 2: Rear combination lamp unit, 4: Road surface drawing lamp, 5: Lighting control unit, 6: Bank angle sensor, 7: External sensor (an example of detection unit), 8: Speed sensor, 21L: Left stop lamp, 21R: right stop lamp, 23L: left tail / stop lamp, 23R: right tail / stop lamp, 25L: left turn signal lamp, 25R: right turn signal lamp, 41: light source, 43L, 43R: light guide Body (an example of an optical member), 43L1, 43R1: first light emitting area, 43L2, 43R2: non-light emitting area, 43L3, 43R3: second light emitting area, 100: motorcycle (an example of a vehicle), 101: tandem seat, 103 : Projection part, 105L, 105R: First cowl, 105L1, 105R1: Bending part, 107L, 107R: Second cow , 107L1,107R1: first region, 107L2,107R2: second region, P: road drawing pattern, V: vehicle behind

Claims (6)

A vehicle lamp provided to a vehicle capable of traveling in a corner by inclining a vehicle body in a direction of bending,
A first lamp for emitting light to the rear of the vehicle; and a second lamp for emitting light to the rear of the vehicle disposed in front of the vehicle than the first lamp,
The first lamp includes a light source and an optical member that diffuses the light emitted from the light source.
A vehicle lamp, wherein at least a part of the optical member is formed of a transparent member or a member having a light transmitting property, whereby the second lamp can be seen through the first lamp.   The vehicle lamp according to claim 1, wherein the optical member is formed in a plate shape. The optical member has a first light emitting area for diffusing light of the light and a non-light emitting area for non-diffusing light of the light;
The vehicular lamp according to claim 1 or 2, wherein the optical member is configured such that the first light emitting area and the non-light emitting area are alternately arranged to form a stripe pattern.   The vehicle lamp according to claim 3, wherein the first light emitting region is made of a material including a light diffusing material. The optical member further includes a second light emitting region disposed at the outer edge thereof and made of a material including a light diffusing material,
The vehicular lamp according to claim 3 or 4, wherein the light emission intensity of the second light emission region is higher than the light emission intensity of the first light emission region. The first lamp functions as a tail lamp or a stop lamp,
The vehicle lamp according to any one of claims 1 to 5, wherein the second lamp functions as a turn signal lamp.

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