WO2022196296A1 - Dispositif de commande de lampe de véhicule, procédé de commande de lampe de véhicule et système de lampe de véhicule - Google Patents

Dispositif de commande de lampe de véhicule, procédé de commande de lampe de véhicule et système de lampe de véhicule Download PDF

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Publication number
WO2022196296A1
WO2022196296A1 PCT/JP2022/007941 JP2022007941W WO2022196296A1 WO 2022196296 A1 WO2022196296 A1 WO 2022196296A1 JP 2022007941 W JP2022007941 W JP 2022007941W WO 2022196296 A1 WO2022196296 A1 WO 2022196296A1
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WO
WIPO (PCT)
Prior art keywords
pedestrian
vehicle
vehicle lamp
control device
light
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PCT/JP2022/007941
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English (en)
Japanese (ja)
Inventor
航 中島
能子 木村
開 池田
実 山口
Original Assignee
スタンレー電気株式会社
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Application filed by スタンレー電気株式会社 filed Critical スタンレー電気株式会社
Publication of WO2022196296A1 publication Critical patent/WO2022196296A1/fr

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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
    • B60Q1/04—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
    • B60Q1/14—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 having dimming means
    • 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

Definitions

  • the present disclosure relates to a vehicle lamp control device and control method, and a vehicle lamp system.
  • Patent Document 1 discloses that when the illuminance of a predetermined light projection range is equal to or greater than a predetermined value and a pedestrian is detected within the light projection range, the vehicle in the light projection range is detected.
  • a headlight control device is disclosed that automatically reduces the illuminance of headlights so that pedestrians can be visually recognized as shadows cast by the headlights of oncoming vehicles.
  • Patent Document 2 when the vehicle is in a substantially stopped state, an intermediate region in the vehicle width direction located between a pair of left and right headlamps on the front portion of the vehicle is covered substantially over the entire width.
  • a vehicle lighting configured to emit light from a luminous body configured to emit light and to dim each headlamp in order to make pedestrians between the own vehicle and the oncoming vehicle easier to see from the oncoming vehicle side. system is described.
  • the light emitting body provided in the front of the vehicle is configured to make a part of the pedestrian's body stand out as a silhouette, so that the pedestrian can be seen outside the front of the vehicle. It is considered that the pedestrian's visibility does not improve so much in such a case where the vehicle exists in the position.
  • JP 2019-108101 A Japanese Patent No. 5361571
  • One of the purposes of the specific aspects of the present disclosure is to improve the visibility of pedestrians from the oncoming vehicle side.
  • a control device for a vehicle lamp is a device for (a) controlling the operation of a vehicle lamp capable of selective light irradiation, and A control device for a vehicle lamp, which controls the vehicle lamp so as to form illumination light on a background area behind the pedestrian on an extension of a first imaginary straight line passing through the position of the pedestrian.
  • a control device for a vehicle lamp is a device that (a) controls the operation of a vehicle lamp capable of selective light irradiation, and (b) controls the position of an oncoming vehicle and the position of the oncoming vehicle.
  • a method of controlling a vehicle lamp is a method of (a) controlling an operation of a vehicle lamp capable of selective light irradiation, and comprising: (b) a position of an oncoming vehicle; A control method for a vehicle lamp, wherein the vehicle lamp is controlled so as to form illumination light on a background area behind the pedestrian on an extension of a first imaginary straight line passing through the position of the pedestrian. .
  • a vehicle lamp control device is a vehicle lamp system including the control device according to 1 or 2 above and a vehicle lamp controlled by the control device.
  • FIG. 1 is a block diagram showing the configuration of a vehicle lamp system according to one embodiment.
  • FIG. 2 is a diagram showing a configuration example of a variable light distribution unit.
  • FIG. 3 is a diagram showing a configuration example of a computer system that implements the controller.
  • FIG. 4 is a diagram for explaining the principle of setting the area behind the pedestrian (background area) according to the positions of the oncoming vehicle and the pedestrian.
  • FIG. 5 is a diagram for schematically explaining light distribution control by the vehicle lamp system.
  • FIG. 6 is a flow chart showing the operation procedure of the vehicle lamp system.
  • FIG. 7 is a diagram for explaining a method of detecting the presence or absence of a pedestrian in step S13.
  • FIGS. 8A and 8B are diagrams for explaining an example of light distribution control by the vehicle lamp system.
  • FIGS. 9A and 9B are diagrams for explaining an example of light distribution control by the vehicle lamp system.
  • FIG. 1 is a block diagram showing the configuration of a vehicle lamp system according to one embodiment.
  • the illustrated vehicle lamp system includes an imaging device 10, a radar device 11, an illuminance sensor 12, a controller 13, and a pair of headlamps (vehicle lamps) 14L and 14R.
  • the imaging device 10 captures the space in front of the vehicle and generates an image of the space. In addition, the imaging device 10 detects the positions of preceding vehicles and oncoming vehicles, as well as the positions of objects such as pedestrians, by performing predetermined image recognition processing on the captured images. do.
  • This imaging device 10 is installed, for example, above the inner side of the windshield of the own vehicle.
  • the imaging device 10 includes, for example, a camera that generates an image and an image processor that performs image recognition processing on the image. Note that the image recognition processing function may be implemented in the controller 13 .
  • the radar device 11 By emitting radio waves and measuring the reflected waves, the radar device 11 detects the positions, distances, directions of existence, etc. of preceding vehicles, oncoming vehicles, pedestrians, and the like.
  • a lidar device (LIDAR: Light Detection and Ranging) that detects the position, distance, presence direction, etc. of preceding vehicles, oncoming vehicles, pedestrians, etc. using scattered light from laser irradiation is used. good too.
  • the controller 13 controls the operation of the pair of headlights 14L and 14R.
  • the controller 13 includes a vehicle position acquisition unit 20, a pedestrian position acquisition unit 21, a light distribution pattern setting unit 22, and a control signal generation unit 23 as functional blocks.
  • the controller 13 uses a computer system having, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., as shown in FIG. 3, which will be described later. It is realized by executing This controller 13 corresponds to the "control device". Also, the light distribution pattern setting section corresponds to the "setting section”.
  • the vehicle position acquisition unit 20 acquires signals or data representing the position of the forward vehicle from the imaging device 10 .
  • the forward vehicle referred to here is, for example, an oncoming vehicle, a preceding vehicle, or the like.
  • the position of the forward vehicle is represented, for example, by a relative angle with respect to the own vehicle position (the position of the imaging device 10).
  • the vehicle position acquisition unit 20 may acquire the position of the forward vehicle from the radar device 11 or may acquire the position of the forward vehicle from both the radar device 11 and the imaging device 10 .
  • the priority of the information (for example, priority is given to the imaging device 10) may be determined.
  • the pedestrian position acquisition unit 21 acquires signals or data representing the position of the pedestrian from the imaging device 10 .
  • the pedestrian's position is represented, for example, by a relative angle with respect to the own vehicle position (the position of the imaging device 10).
  • the pedestrian position acquisition unit 21 may acquire the pedestrian position from the radar device 11 or may acquire the pedestrian position from both the radar device 11 and the imaging device 10 .
  • the priority of the information (for example, priority is given to the imaging device 10) may be determined.
  • the light distribution pattern setting unit 22 determines the area behind the pedestrian (from the oncoming vehicle) according to the position of the oncoming vehicle acquired by the vehicle position acquiring unit 20 and the pedestrian position acquired by the pedestrian position acquiring unit 21.
  • a light distribution pattern is set so that irradiation light is formed in an area that becomes a background of a pedestrian when viewed (hereinafter referred to as a "background area").
  • background area A specific method for setting the light distribution pattern will be described later.
  • the control signal generation unit 23 generates a control signal corresponding to the light distribution pattern set by the light distribution pattern setting unit 22, and supplies the control signal to the variable light distribution unit 31 of each of the headlights 14L and 14R. Further, the control signal generator 23 generates a control signal corresponding to low beam and supplies it to the low beam unit 30 of each headlamp 14L, 14R.
  • Each of the headlights 14L and 14R is provided on the left and right sides of the front of the vehicle, and is used to illuminate the front of the vehicle.
  • Each headlamp 14L, 14R has a low beam unit 30 and a variable light distribution unit 31, respectively.
  • the low beam unit 30 has, for example, a light source bulb and a reflector, operates in response to a control signal from the controller 13, reflects light emitted from the light source bulb by the reflector, and shields part of the reflected light with a light shielding plate. By doing so, light for forming a low beam (passing light) that mainly irradiates an area relatively close to the vehicle is generated.
  • the variable light distribution unit 31 operates upon receiving a control signal from the controller 13, and forms light that illuminates the space behind the pedestrian.
  • a variable light distribution unit 31 for example, a variable light distribution unit using a liquid crystal element as exemplified in FIG. 2, which will be described later, can be used.
  • a variable light distribution unit that forms a light distribution pattern by arranging a plurality of LEDs and selectively turning on/off the LEDs, or a variable light distribution unit that movably reflects light from a laser element.
  • Various types of variable light distribution units such as a variable light distribution unit that forms a light distribution pattern by scanning with a plate and turning on and off a laser element at high speed, can also be used.
  • FIG. 2 is a diagram showing a configuration example of a variable light distribution unit.
  • the variable light distribution unit 31 shown in FIG. 2 is a diagram showing a configuration example of a variable light distribution unit.
  • the light source 150 includes, for example, a white light LED configured by combining a light emitting element (LED) that emits blue light with a yellow phosphor.
  • the light source 150 comprises, for example, a plurality of white light LEDs arranged in a matrix or line.
  • a light source generally used for vehicles such as a laser, a light bulb, and a discharge lamp.
  • other optical systems for example, lenses, reflecting mirrors, and combinations thereof may exist on the path from the light source 150 to the liquid crystal element 151 .
  • the liquid crystal element 151 has, for example, a plurality of individually controllable pixel portions (light modulation regions), and a driver (not shown) that operates in accordance with a control signal from the controller 13 .
  • the transmittance of each pixel portion is variably set according to the magnitude of the applied voltage.
  • the pair of polarizing plates 152a and 152b have their polarizing axes substantially perpendicular to each other, and are arranged opposite to each other with the liquid crystal element 151 interposed therebetween.
  • the polarizing plates 152a and 152b for example, absorption polarizing plates made of general organic materials (iodine-based, dye-based) can be used.
  • a wire grid type polarizing plate when it is desired to emphasize heat resistance, it is also preferable to use a wire grid type polarizing plate. Alternatively, an absorption polarizing plate and a wire grid polarizing plate may be used in combination.
  • the projection lens 153 expands an image (image having brightness and darkness) formed by light passing through the liquid crystal element 151 and projects it in front of the vehicle, and an appropriately designed lens is used.
  • an appropriately designed lens is used.
  • a reverse projection type projector lens is used.
  • FIG. 3 is a diagram showing a configuration example of a computer system that implements the controller.
  • the illustrated computer system includes a CPU 201, a ROM 202, a RAM 203, a storage device 204, and an external interface (I/F) 205 that are communicatively connected.
  • the CPU 201 operates based on a basic control program read from the ROM 202, reads a program (application program) 206 stored in the storage device 204, and executes the program, thereby realizing the functions of the controller 13 described above.
  • a RAM 203 temporarily stores data to be used when the CPU 201 operates.
  • the storage device 204 is a non-volatile data storage device such as a hard disk or SSD (Solid State Drive), and stores various data such as the program 206 .
  • An external interface 205 is an interface that connects the CPU 201 and an external device, and is used to connect the imaging device 10 and the CPU 201, for example.
  • FIGS. 4A and 4B are diagrams for explaining the principle of setting the area behind the pedestrian (background area) according to the positions of the oncoming vehicle and the pedestrian.
  • FIGS. 4A and 4B schematically show a plan view of the host vehicle 100, the oncoming vehicle 101, and the pedestrian 102 from above.
  • the relative positions of the oncoming vehicle 101 and the pedestrian 102 are defined, for example, with the position of the own vehicle 100 as the origin (0, 0), the traveling direction of the own vehicle 100 as the x axis, and the vehicle width direction as the y axis. can be expressed as coordinate values taken in
  • the position coordinates of the oncoming vehicle 101 be (x1, y1)
  • the position coordinates of the pedestrian 102 be (x2, y2).
  • the position coordinates (0, 0) of the own vehicle 100 are, for example, the installation position of the imaging device 10 and generally correspond to the center of the own vehicle 100 in the vehicle width direction. Further, the position coordinates of the oncoming vehicle 101 can be determined corresponding to the center position of the oncoming vehicle 101 in the vehicle width direction, which is the front portion of the oncoming vehicle 101, for example. Also, the position coordinates of the pedestrian 102 can be determined corresponding to the position of the head of the pedestrian 102, for example.
  • a straight line (first imaginary straight line) 103 passing through the position coordinates (x1, y1) of the oncoming vehicle 101 and the position coordinates (x2, y2) of the pedestrian 102 is assumed.
  • a straight line (second imaginary straight line) 104 passing through the position coordinates (0, 0) of the vehicle 100 and the position coordinates (x2, y2) of the pedestrian 102 is assumed.
  • a background area 110 is set on the extension (on the extension line) of the straight line 103 and behind the pedestrian 102 based on the above equation (1).
  • This background area 110 is further set to an area where a straight line with a greater slope than the slope (y2/x2) of the equation (2) can be assumed (the area above the straight line 104 in the figure) based on the above equation (2). preferably.
  • the pedestrian 102 can be seen in front of the own vehicle 100 or the oncoming vehicle 101 When the pedestrian 102 is in a position where there is no traffic, for example, when the pedestrian 102 is on the side of the road (see FIG. 4A), or when the pedestrian 102 is in front of the own vehicle 100 (see FIG. 4B).
  • a background area 110 can be set behind the pedestrian 102 regardless of the position.
  • FIG. 5 is a diagram for schematically explaining light distribution control by the vehicle lamp system.
  • FIG. 5 also schematically shows a plan view of the own vehicle 100, the oncoming vehicle 101, and the pedestrian 102 from above.
  • a pedestrian 102 on the side of the road, and a background area 110 is set behind the pedestrian 102 to form the irradiation light 120 .
  • a low beam 121 that is the light emitted by the low beam unit 30 is also shown.
  • the pedestrian 102 By forming the illumination light 120 behind the pedestrian 102, the pedestrian 102 can be seen as a silhouette when viewed from the oncoming vehicle 101 side, so the visibility of the pedestrian 102 is improved. In other words, in this situation, the oncoming vehicle 101 is often irradiated with only a low beam, and sufficient light does not reach the pedestrian. Thus, the silhouette of the pedestrian 102 can be emphasized, and the visibility of the pedestrian 102 from the oncoming vehicle 101 side can be improved.
  • the pedestrian 102 since the pedestrian 102 is not in front of the vehicle 100, but is in the side of the road (for example, before the crossing starts), the presence of the pedestrian 102 can be easily detected by the oncoming vehicle 101. Become.
  • the space behind the pedestrian 102 or the foot of the pedestrian 102 may be affected by the reflected light generated by the irradiation of the irradiation light 120 on these objects. Since the brightness of the road surface becomes even stronger, the silhouette is more emphasized. Note that the irradiation light 120 may be irradiated onto the road surface behind the pedestrian 102 .
  • FIG. 6 is a flow chart showing the operation procedure of the vehicle lamp system. As for each operation procedure, it is possible to change the order of each processing step or add another processing step as long as the result is not contradictory or inconsistent, and such a mode is not excluded.
  • step S11; YES If the illuminance detected by the illuminance sensor 12 is equal to or less than a certain value (step S11; YES), there is an oncoming vehicle based on the data acquired by the vehicle position acquisition unit 20 (step S12; YES), and there is a pedestrian If there is a pedestrian based on the data acquired by the position acquisition unit 21 (step S13; YES), the light distribution pattern setting unit 22 acquires the position coordinates of the oncoming vehicle from the vehicle position acquisition unit 20, and , the position coordinates of the pedestrian are obtained from the pedestrian position obtaining unit 21 (step S14).
  • step S11 if the illuminance is greater than a certain value (step S11; NO), if there is no oncoming vehicle (step S12; NO), or if there is no pedestrian (step S13; NO), the process returns to step S11. .
  • the "fixed value" in step S11 is a value that is determined in advance assuming situations in which light irradiation in front of the vehicle is necessary due to nighttime or cloudy weather, etc., and is appropriately set based on experiments and the like. can.
  • the light distribution pattern setting unit 22 sets a background area behind the pedestrian based on the obtained positional coordinates of the oncoming vehicle and the pedestrian and the positional coordinates of the own vehicle (step S15).
  • step S16 When the position of the pedestrian exists within the predetermined range in front of the vehicle (step S16; YES), the light distribution pattern setting unit 22 transfers the setting contents of the light distribution pattern including the background area to the control signal generating unit 23. . On the other hand, if the position of the pedestrian is outside the predetermined range in front of the vehicle (step S16; NO), the process returns to step S11. That is, the background area is not irradiated with light. Also, if the background region was irradiated with light at the previous processing opportunity, this light irradiation is stopped.
  • a predetermined range (angle range) in step S16 means, for example, a range forming angles ⁇ 1 and ⁇ 2 to the left and right with respect to the traveling direction (front-rear direction) of the own vehicle 100 as shown in FIG. Can be set. Specifically, when tan ⁇ 1>y2/x2>tan ⁇ 2, it can be determined that the pedestrian's position is within the predetermined range. If y2/x2 ⁇ tan ⁇ 1 or y2/x2 ⁇ tan ⁇ 2, it can be determined that the pedestrian's position is outside the predetermined range.
  • the control signal generator 23 generates a control signal for forming irradiation light corresponding to the light distribution pattern including the set background area, and outputs it to each of the headlights 14L and 14R (step S17). Thereby, illumination light is formed in the background area of the pedestrian (see FIG. 5). After that, the process returns to step S14.
  • FIGS. 8(A) and 8(B) are diagrams for explaining an example of light distribution control by the vehicle lamp system.
  • FIGS. 9A and 9B are diagrams for explaining an example of light distribution control by the vehicle lamp system.
  • the state seen ahead from the own vehicle side is shown typically.
  • the numbers attached to the horizontal and vertical axes indicate angles (unit: deg) in the horizontal direction and the vertical direction as seen from the own vehicle.
  • a pedestrian 102 exists on the side of the road relatively far from the own vehicle, and an oncoming vehicle 101 also exists.
  • the low beam 121 is basically formed without emitting the high beam from the own vehicle.
  • the illumination light 120 is formed in the background area of the pedestrian 102 .
  • the pedestrian 102 starts crossing from the state shown in FIG.
  • the background area of the pedestrian 102 is set according to the relative positional relationship between the oncoming vehicle 101 and the pedestrian 102, and the illumination light 120 is formed accordingly.
  • the visibility of the pedestrian 102 from the oncoming lane 101 side can be improved from before the pedestrian 102 starts to cross the road to while the pedestrian 102 is crossing the road.
  • the effect of the irradiation light 120 causes the pedestrian 102 to start crossing.
  • the visibility of the pedestrian 102 from the opposite lane 101 side can be continuously improved from the front to the crossing.
  • the present disclosure is not limited to the contents of the above-described embodiments, and can be implemented in various modifications within the scope of the gist of the present disclosure.
  • a pedestrian was given as an example of the target object, but a bicycle rider or the like may be used as the target object.
  • no particular reference was made to the preceding vehicle, but for example, when there is a preceding vehicle, control may be performed so that the irradiation light 120 is not formed. Further, when it is detected that an oncoming vehicle is turning on the low beam or high beam, the illumination light to the background area may be formed.
  • the background area is illuminated with light.
  • the distance for example, about 40 m
  • the light irradiation of the pedestrian's background area by the own vehicle may be stopped or the light may be reduced.
  • the brightness (luminance) of the illumination light to the background area of the pedestrian was not particularly mentioned, but the brightness may be set variably.
  • the brightness of the illumination light to the background area may be increased as the distance between the oncoming vehicle and the pedestrian becomes shorter.
  • the light emitted from the oncoming vehicle to the pedestrian gradually becomes brighter, and the background area can also be made brighter, thereby weakening the silhouette vision effect of the pedestrian. can be prevented.
  • the term "dimming" as used herein includes making the brightness of the irradiation light substantially zero, that is, stopping the light irradiation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

La présente invention améliore la visibilité d'un piéton présent du même côté qu'un véhicule venant en sens inverse.　La présente invention concerne un dispositif pour commander le fonctionnement d'une lampe de véhicule capable d'effectuer une émission de lumière sélective, la lampe de véhicule étant commandée de façon à former une lumière d'éclairage sur une région d'arrière-plan derrière un piéton le long de la ligne d'extension d'une première ligne virtuelle qui passe à travers l'emplacement d'un véhicule venant en sens inverse et l'emplacement du piéton.
PCT/JP2022/007941 2021-03-15 2022-02-25 Dispositif de commande de lampe de véhicule, procédé de commande de lampe de véhicule et système de lampe de véhicule WO2022196296A1 (fr)

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JP2021041759A JP2022141445A (ja) 2021-03-15 2021-03-15 車両用灯具の制御装置、車両用灯具の制御方法、車両用灯具システム
JP2021-041759 2021-03-15

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WO2024106324A1 (fr) * 2022-11-14 2024-05-23 株式会社小糸製作所 Phare de véhicule

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006176020A (ja) * 2004-12-22 2006-07-06 Nissan Motor Co Ltd 歩行者報知装置及び方法
JP2011011569A (ja) * 2009-06-30 2011-01-20 Koito Mfg Co Ltd 車両発光システム
JP2012155376A (ja) * 2011-01-24 2012-08-16 Sanyo Electric Co Ltd 移動体通信装置及び制御判定方法
JP2014050100A (ja) * 2012-09-01 2014-03-17 Honda Motor Co Ltd 車両周辺監視装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006176020A (ja) * 2004-12-22 2006-07-06 Nissan Motor Co Ltd 歩行者報知装置及び方法
JP2011011569A (ja) * 2009-06-30 2011-01-20 Koito Mfg Co Ltd 車両発光システム
JP2012155376A (ja) * 2011-01-24 2012-08-16 Sanyo Electric Co Ltd 移動体通信装置及び制御判定方法
JP2014050100A (ja) * 2012-09-01 2014-03-17 Honda Motor Co Ltd 車両周辺監視装置

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