WO2023085213A1 - 配光制御装置および車両用灯具システム - Google Patents

配光制御装置および車両用灯具システム Download PDF

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Publication number
WO2023085213A1
WO2023085213A1 PCT/JP2022/041191 JP2022041191W WO2023085213A1 WO 2023085213 A1 WO2023085213 A1 WO 2023085213A1 JP 2022041191 W JP2022041191 W JP 2022041191W WO 2023085213 A1 WO2023085213 A1 WO 2023085213A1
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Prior art keywords
light distribution
processing unit
arithmetic processing
arithmetic
information
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PCT/JP2022/041191
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English (en)
French (fr)
Japanese (ja)
Inventor
恭平 神谷
浩孝 沢田
聡 木原
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Koito Manufacturing Co Ltd
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Koito Manufacturing Co Ltd
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Priority to JP2023559608A priority Critical patent/JPWO2023085213A1/ja
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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
    • 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
    • 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
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
    • H05B47/125—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings by using cameras
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection

Definitions

  • the present invention relates to a light distribution control device and a vehicle lamp system.
  • ADB (Adaptive Driving Beam) control has been proposed that dynamically and adaptively controls the light distribution pattern based on the vehicle's surrounding conditions.
  • ADB control uses a camera to detect the presence or absence of a forward vehicle that should be avoided from irradiating high-intensity light, and shades an area corresponding to the forward vehicle (see Patent Document 1, for example). By shielding the area corresponding to the forward vehicle, it is possible to improve the visibility of the driver of the own vehicle while reducing the glare given to the driver of the forward vehicle.
  • the inventors of the present invention have found that the usability of the light distribution control device is such that it is easy to incorporate into a vehicle system, and it is easy to adapt to changes in the built-in vehicle system. I came up with the technology to improve the
  • the present invention has been made in view of such circumstances, and one of its purposes is to provide a technique for improving the usability of a light distribution control device.
  • one aspect of the present invention is a light distribution control device.
  • This light distribution control device receives image information in front of the own vehicle from the imaging device, receives position information of the forward vehicle from the vehicle ECU, and determines a light shielding area for the forward vehicle; a first arithmetic processing unit; a second arithmetic processing unit that receives information on the light shielding area from the optical unit, combines the light shielding area with the basic light distribution pattern, and determines a light distribution pattern to be formed by the optical unit.
  • the first arithmetic processing unit is composed of a parallel processing type arithmetic device.
  • the second arithmetic processing unit is composed of a sequential processing type arithmetic device.
  • This light distribution control device includes a second arithmetic processing unit that determines a light distribution pattern formed by an optical unit, including a light shielding area for a forward vehicle, based on image information in front of the own vehicle and positional information on the forward vehicle; a fifth arithmetic processing section that converts pattern information into unit information corresponding to the optical characteristics of the optical unit.
  • the second arithmetic processing unit is composed of a sequential processing type arithmetic device.
  • the fifth arithmetic processing unit is composed of a parallel processing type arithmetic device.
  • This vehicular lamp system includes an optical unit capable of irradiating a visible light beam having a variable intensity distribution to a front region of a vehicle, an imaging device for imaging the front region, and a light distribution control device according to any one of the aspects described above. Prepare.
  • FIG. 1 is a block diagram of a vehicle lamp system according to an embodiment
  • FIG. 4 is a timing chart of light distribution control executed by the light distribution control device according to the embodiment in normal times
  • FIG. 3A is a timing chart of light distribution control executed by the light distribution control device according to the embodiment when an abnormality is detected.
  • FIG. 3B is a timing chart of light distribution control executed by the light distribution control device according to the reference example when an abnormality is detected.
  • FIG. 1 is a block diagram of a vehicle lamp system 1 according to an embodiment.
  • the constituent elements of the vehicle lighting system 1 are drawn as functional blocks. These functional blocks are implemented by elements and circuits such as a CPU and memory of a computer as hardware configurations, and are implemented by computer programs and the like as software configurations.
  • the vehicle lighting system 1 includes an optical unit 2, an imaging device 4, and a light distribution control device 6. These may all be built in the same housing, or some members may be provided outside the housing.
  • the optical unit 2, imaging device 4, and light distribution control device 6 are housed in a lamp room.
  • the lamp chamber is defined by a lamp body having an opening on the front side of the vehicle and a translucent cover attached to cover the opening of the lamp body.
  • the imaging device 4 and the light distribution control device 6 may be arranged outside the lamp room, for example, on the vehicle side.
  • the imaging device 4 may be an in-vehicle camera.
  • the light distribution control device 6 may be incorporated in the vehicle ECU in whole or in part.
  • the optical unit 2 is a variable light distribution lamp capable of irradiating a visible light beam L1 with a variable intensity distribution to the front area of the own vehicle.
  • the optical unit 2 can individually change the illuminance of the light to irradiate a plurality of individual regions R arranged in the front region.
  • the plurality of individual regions R are arranged, for example, in a matrix.
  • the optical unit 2 receives information (unit information UPTN to be described later) designating a light distribution pattern from the light distribution control device 6, and emits a visible light beam L1 having an intensity distribution corresponding to the light distribution pattern.
  • a light distribution pattern is formed in front of the vehicle.
  • the light distribution pattern is grasped as a two-dimensional illuminance distribution of an irradiation pattern 902 formed on a virtual vertical screen 900 in front of the vehicle by the optical unit 2 .
  • the configuration of the optical unit 2 is not particularly limited, and includes, for example, a plurality of light sources arranged in a matrix and a lighting circuit that independently drives and lights each light source.
  • Preferred examples of light sources include semiconductor light sources such as LEDs (light emitting diodes), LDs (laser diodes), organic or inorganic ELs (electroluminescence).
  • Each individual region R is associated with each light source, and each individual region R is individually irradiated with light from each light source.
  • the resolution of the optical unit 2 in other words, the light distribution resolution is, for example, 1,000 pixels to 2,000,000 pixels.
  • the resolution of the optical unit 2 means the number of unit areas whose illuminance can be changed independently in the light distribution pattern.
  • the optical unit 2 includes a matrix type pattern forming device such as a DMD (Digital Mirror Device) or a liquid crystal device, or a scanning device that scans the front of the vehicle with light source light.
  • a matrix type pattern forming device such as a DMD (Digital Mirror Device) or a liquid crystal device, or a scanning device that scans the front of the vehicle with light source light.
  • Optical patterning devices and the like may also be included.
  • the imaging device 4 has sensitivity in the visible light region, and images the front region of the own vehicle to generate image information IMG.
  • the imaging device 4 images reflected light L2 of the visible light beam L1 from an object in front of the vehicle.
  • the imaging device 4 also captures light emitted by forward vehicles including preceding and oncoming vehicles.
  • the image information IMG generated by the imaging device 4 is sent to the light distribution control device 6 .
  • the image information IMG that the light distribution control device 6 acquires from the imaging device 4 may be RAW image data, or may be image data subjected to predetermined image processing by the imaging device 4 .
  • the case where the light distribution control device 6 receives image data obtained by performing image processing on RAW image data generated by the imaging device 4 by a processing device other than the imaging device 4 also corresponds to acquisition of the image information IMG from the imaging device 4. do.
  • the light distribution control device 6 performs ADB control that dynamically and adaptively controls the light distribution of the optical unit 2 according to the target existing in the forward area.
  • the light distribution control device 6 includes a first arithmetic processing unit 8, a second arithmetic processing unit 10, a third arithmetic processing unit 12, a fourth arithmetic processing unit 14, a fifth arithmetic processing unit 16, and a sixth arithmetic processing unit. and a processing unit 18 .
  • Each part operates by executing a program held in a memory by an integrated circuit that constitutes the part. Formation control of the light distribution pattern by the light distribution control device 6 will be described below.
  • the first arithmetic processing unit 8 receives image information IMG in front of the vehicle from the imaging device 4 . Further, the first arithmetic processing unit 8 receives the position information POS of the forward vehicle from the vehicle ECU 300 .
  • Vehicle ECU 300 repeatedly generates position information POS as part of control in, for example, advanced driver-assistance systems (ADAS). Vehicle ECU 300 receives image information IMG from imaging device 4 and performs image analysis on image information IMG using known methods including algorithm recognition and deep learning. Accordingly, vehicle ECU 300 can generate position information POS.
  • the position information POS as an example is information indicating an area where the forward vehicle exists in the image information IMG.
  • the vehicle in front has a pair of light spots corresponding to the lighting fixtures.
  • a pair of light spots corresponds to the headlamps if the forward vehicle is an oncoming vehicle and to the rear lamps if the forward vehicle is a leading vehicle.
  • Rear lamps include stop lamps and tail lamps.
  • vehicle ECU 300 determines the presence area of the forward vehicle based on the pair of light spots in image information IMG. It should be noted that vehicle ECU 300 may determine the presence area based on the contour of the forward vehicle. Also, the position information POS may be information of an area obtained by adding a predetermined margin around the existence area.
  • the first arithmetic processing unit 8 determines a light shielding area for the forward vehicle and generates light shielding area information (hereinafter referred to as light shielding area information SHD as appropriate).
  • a light-shielding region is a portion where the brightness (illuminance) in the light distribution pattern is zero, or a portion whose brightness is lower than before light-shielding.
  • the first arithmetic processing unit 8 synthesizes the position information POS with the image information IMG, and superimposes the presence area of the forward vehicle on the image information IMG. Then, the shaded area is determined based on the pairs of light spots in the existence area. Specifically, the first arithmetic processing unit 8 performs various types of image processing such as demosaicing, resizing, binarization, and morphological conversion on the entire image information IMG or, depending on the processing, on existing regions in the image information IMG. Apply. As a result, it is possible to generate an image including a light shielding area that overlaps with the presence area of the forward vehicle as the light shielding area information SHD.
  • the light shielding area information SHD may include a dimming area that overlaps with a high-brightness target such as a sign.
  • the dimming region is a portion of the light distribution pattern in which the luminance is higher than that of the light shielding region and lower than that before dimming.
  • the first arithmetic processing unit 8 sends the light shielding area information SHD to the second arithmetic processing unit 10 .
  • the third arithmetic processing unit 12 receives light distribution mode information MOD from the vehicle ECU 300 .
  • the light distribution mode information MOD is information about a light distribution mode determined based on a driver's instruction by operating a light switch (not shown) or the like, the running state of the own vehicle, the surrounding environment of the own vehicle, or the like.
  • the light distribution modes include a high beam mode that forms a high beam light distribution pattern, a low beam mode that forms a low beam light distribution pattern, a town mode that forms a light distribution pattern suitable for urban driving, and a light distribution suitable for high-speed driving. Pattern forming highway modes and the like are included.
  • the third arithmetic processing unit 12 determines a basic light distribution pattern according to the light distribution mode information MOD.
  • the basic light distribution pattern is a light distribution pattern to be combined with the light shielding area determined by the first arithmetic processing unit 8 .
  • the third arithmetic processing unit 12 sends the basic light distribution pattern information (hereinafter referred to as basic light distribution pattern information BPTN as appropriate) to the second arithmetic processing unit 10 .
  • Basic light distribution pattern information BPTN as an example is an image of a basic light distribution pattern.
  • the second arithmetic processing unit 10 repeatedly determines whether it has received the light shielding area information SHD from the first arithmetic processing unit 8 . Further, it repeatedly determines whether or not the basic light distribution pattern information BPTN has been received from the third arithmetic processing unit 12 . Then, when the light shielding area information SHD and the basic light distribution pattern information BPTN are input, the second arithmetic processing section 10 determines the light distribution pattern to be formed by the optical unit 2 based on these information, and determines the light distribution pattern information PTN. to generate In other words, the second arithmetic processing unit 10 determines the light distribution pattern including the light blocking area based on the image information IMG and the position information POS of the forward vehicle.
  • the second arithmetic processing unit 10 combines the image of the light shielding area with the image of the basic light distribution pattern. As a result, an image of the basic light distribution pattern including the light shielding area can be generated as the light distribution pattern information PTN.
  • the second arithmetic processing section 10 sends the light distribution pattern information PTN to the fifth arithmetic processing section 16 .
  • the fifth arithmetic processing section 16 converts the light distribution pattern information PTN into unit information UPTN corresponding to the optical characteristics of the optical unit 2 . For example, if the optical unit 2 has a projection lens, the light source image is flipped vertically and horizontally by the projection lens and projected onto the front area. Therefore, the fifth arithmetic processing section 16 generates the unit information UPTN by inverting the image forming the light distribution pattern information PTN.
  • the light distribution pattern that matches the processing power of the second arithmetic processing unit 10 and the light distribution pattern that matches the processing power of the optical unit 2 may differ in resolution, color space, frame rate, and the like.
  • the formats of information handled by the second arithmetic processing section 10 and the optical unit 2 may be different. Therefore, the fifth arithmetic processing section 16 generates the unit information UPTN by changing the format of the light distribution pattern information PTN to the format for the optical unit 2 .
  • the fifth arithmetic processing section 16 sends the unit information UPTN to the optical unit 2 .
  • the optical unit 2 is driven based on the unit information UPTN.
  • the dimming method of the light source is analog dimming
  • the optical unit 2 adjusts the DC level of the drive current flowing through the light source.
  • the light source dimming method is PWM (Pulse Width Modulation) dimming
  • the optical unit 2 switches the current flowing through the light source and adjusts the ratio of the ON period to adjust the average level of the drive current. do.
  • the optical unit 2 has a DMD, ON/OFF switching of each mirror element constituting the DMD may be controlled.
  • the optical unit 2 has a liquid crystal device, the light transmittance of the liquid crystal device may be controlled. As a result, a light distribution pattern corresponding to the light distribution pattern information PTN is formed in front of the vehicle.
  • the fifth arithmetic processing section 16 In addition to outputting the unit information UPTN to the optical unit 2 , the fifth arithmetic processing section 16 also sends timing information TIM indicating that the unit information UPTN has been output to the sixth arithmetic processing section 18 .
  • the sixth arithmetic processing unit 18 repeatedly determines whether or not the timing information TIM has been received from the fifth arithmetic processing unit 16 .
  • the sixth arithmetic processing unit 18 Upon receiving the timing information TIM, the sixth arithmetic processing unit 18 sends an imaging control signal TRG instructing imaging to the imaging device 4 . That is, the sixth arithmetic processing section 18 instructs the imaging device 4 to take an image in synchronization with transmission of the unit information UPTN from the fifth arithmetic processing section 16 to the optical unit 2 .
  • the imaging device 4 starts imaging when receiving the imaging control signal TRG. As a result, the imaging device 4 can capture an image of the front area under the condition that the optical unit 2
  • the fourth arithmetic processing unit 14 executes fail-safe control by transmitting the setting control signal CFG and the transmission control signal SND.
  • the fourth arithmetic processing unit 14 of the present embodiment executes fail-safe control for all abnormalities in the vehicle ECU 300, the optical unit 2, and the imaging device 4. Only fail-safe control may be performed.
  • the fourth arithmetic processing unit 14 receives the error signal ERR and the network monitoring signal NW from the vehicle ECU 300 .
  • Error signal ERR is transmitted from vehicle ECU 300 when vehicle ECU 300 detects the occurrence of an abnormality in the vehicle system.
  • the fourth arithmetic processing unit 14 can detect that an abnormality has occurred in the vehicle system by receiving the error signal ERR.
  • the network monitoring signal NW continues to be input from the vehicle ECU 300 to the fourth arithmetic processing unit 14 when the communication between the vehicle ECU 300 and the light distribution control device 6 is normal.
  • the fourth arithmetic processing unit 14 can detect that an abnormality (communication error due to interruption, noise, or the like) has occurred in communication with the vehicle ECU 300 based on the reception state of the network monitoring signal NW.
  • the fourth arithmetic processing unit 14 receives the temperature signal TEMP and the network monitoring signal NW from the optical unit 2 .
  • a temperature signal TEMP is a signal indicating the temperature of the optical unit 2 and is periodically transmitted from a temperature sensor (not shown) provided in the optical unit 2 .
  • the fourth arithmetic processing section 14 can detect that the temperature abnormality has occurred in the optical unit 2 based on the temperature signal TEMP.
  • the temperature signal TEMP may be transmitted from the optical unit 2 only when the optical unit 2 has a temperature abnormality.
  • the network monitoring signal NW continues to be input from the optical unit 2 to the fourth arithmetic processing section 14 when the communication between the optical unit 2 and the light distribution control device 6 is normal.
  • the fourth arithmetic processing section 14 can detect that an abnormality has occurred in communication with the optical unit 2 based on the reception state of the network monitoring signal NW.
  • the fourth arithmetic processing unit 14 receives the network monitoring signal NW from the imaging device 4 .
  • the network monitoring signal NW continues to be input from the imaging device 4 to the fourth arithmetic processing unit 14 when the communication between the imaging device 4 and the light distribution control device 6 is normal.
  • the fourth arithmetic processing unit 14 can detect that an abnormality has occurred in communication with the imaging device 4 based on the reception state of the network monitoring signal NW.
  • the fourth arithmetic processing unit 14 repeatedly determines whether it has received an error signal ERR from the vehicle ECU 300 . It also receives a temperature signal TEMP from the optical unit 2 and repeatedly determines whether the temperature of the optical unit 2 indicates a temperature abnormality. Further, it is repeatedly determined whether or not the network monitoring signal NW is received from the vehicle ECU 300, the optical unit 2 and the imaging device 4. FIG. When an abnormality related to at least one of the vehicle ECU 300, the optical unit 2 and the imaging device 4 is detected from these determination results, the fourth processing unit 14 sends a setting control signal CFG to the second processing unit 10. .
  • the setting control signal CFG is a signal for instructing the setting of the light distribution pattern for abnormal conditions.
  • the second arithmetic processing unit 10 repeatedly determines whether it has received the setting control signal CFG from the fourth arithmetic processing unit 14 .
  • the second arithmetic processing unit 10 that has received the setting control signal CFG instructs the optical unit 2 to form a light distribution pattern for use in abnormal conditions.
  • the fourth arithmetic processing section 14 sends the transmission control signal SND to the sixth arithmetic processing section 18 .
  • the transmission control signal SND is a signal that instructs transmission of the imaging control signal TRG regardless of the transmission timing of the unit information UPTN.
  • the sixth arithmetic processing unit 18 repeatedly determines whether or not it has received the transmission control signal SND from the fourth arithmetic processing unit 14 .
  • the sixth arithmetic processing section 18 that has received the transmission control signal SND performs imaging regardless of the transmission timing of the unit information UPTN, in other words, even if the timing information TIM is not received from the fifth arithmetic processing section 16.
  • a control signal TRG is generated and sent to the imaging device 4 .
  • the transmission of the imaging control signal TRG is earlier than when it is based on the timing information TIM.
  • the imaging device 4 When the imaging control signal TRG is transmitted, the imaging device 4 generates the image information IMG, and then the first arithmetic processing section 8 generates the light blocking area information SHD. Upon receiving the light shielding area information SHD, the second arithmetic processing unit 10 that has received the setting control signal CFG generates abnormal light distribution pattern information AbPTN using this as a trigger.
  • the light distribution control device 6 of the present embodiment executes the same processing to update the light distribution pattern in both a situation in which an abnormality is not detected and a situation in which an abnormality is detected. That is, the light distribution pattern is updated through the transmission of the imaging control signal TRG, the generation of the image information IMG, the generation of the shaded area information SHD, and the generation of the light distribution pattern information PTN. Therefore, the transmission of the imaging control signal TRG is the starting point for updating the light distribution pattern. Therefore, by transmitting the transmission control signal SND that prompts the transmission of the imaging control signal TRG, it is possible to form the abnormal light distribution pattern earlier.
  • the image information IMG is sent from the imaging device 4 to the second arithmetic processing unit 10 .
  • an abnormal distribution system having a light shielding area for all light spots included in the image information IMG or for all light spots included in the image forming the light shielding area information SHD is provided.
  • Exemplified are controls that define light patterns.
  • the basic light distribution pattern to be combined with the light shielding area may be determined based on the basic light distribution pattern information BPTN, or may be determined in advance for fail-safe control.
  • the light distribution pattern for low beam is set as the light distribution pattern for abnormal conditions.
  • control for setting the high-beam light distribution pattern to the abnormal light distribution pattern when there is no light spot If a pedestrian present in the front area can be detected, the light distribution pattern for emergency may include a brightened area for the pedestrian.
  • the second arithmetic processing unit 10 generates the abnormal light distribution pattern information AbPTN for instructing formation of the low beam light distribution pattern without using the image information IMG and the light shielding area information SHD.
  • the fail-safe control may be executed only by transmitting/receiving the setting control signal CFG. That is, the second arithmetic processing unit 10 may generate the abnormal light distribution pattern information AbPTN with the reception of the setting control signal CFG as a trigger. In this case, since the procedure from the transmission of the imaging control signal TRG to the generation of the light shielding area information SHD is not performed, the light distribution pattern for abnormal conditions can be formed earlier.
  • the lighting rate of the light source provided in the optical unit 2 decreases due to the formation of an abnormal light distribution pattern or a low beam light distribution pattern that has a larger light shielding area than in the normal state. 2 temperature can be lowered.
  • the first arithmetic processing unit 8 and the fifth arithmetic processing unit 16 are composed of parallel processing arithmetic units.
  • the second arithmetic processing unit 10, the third arithmetic processing unit 12, the fourth arithmetic processing unit 14, and the sixth arithmetic processing unit 18 are composed of sequential processing type (sequential processing type) arithmetic units.
  • the parallel processing arithmetic unit includes one or more integrated circuits selected from the group consisting of FPGA (field-programmable gate array), ASIC (application specific integrated circuit) and SoC (System-on-a-chip).
  • a sequential processing arithmetic device includes one or more integrated circuits selected from the group consisting of a CPU (Central Processing Unit) and a microcomputer (microcontroller).
  • the first arithmetic processing unit 8 and the fifth arithmetic processing unit 16 are configured by FPGA
  • the second arithmetic processing unit 10 the third arithmetic processing unit 12, the fourth arithmetic processing unit 14 and the sixth arithmetic processing unit 18 are CPUs.
  • Parallel processing arithmetic devices such as FPGAs execute hardware processing.
  • Parallel processing arithmetic devices can execute routine processing without conditional branching with high throughput and high time accuracy. In addition, it has the feature that it is easy to change the hardware design.
  • a sequential processing arithmetic unit such as a CPU executes software processing. Sequential processing arithmetic units are suitable for executing complex processing with conditional branching. In addition, it has the feature that it is easy to change the software design.
  • the process itself is a standard process without conditional branching. Therefore, by configuring the first arithmetic processing unit 8 with a parallel processing type arithmetic device, it is possible to generate the light shielding area information SHD at high speed and with high time accuracy.
  • the process of generating the light distribution pattern information PTN and the abnormal light distribution pattern information AbPTN executed by the second arithmetic processing unit 10 is a relatively complicated process involving conditional branching. Therefore, by configuring the second arithmetic processing unit 10 with a sequential processing type arithmetic device, it is possible to suitably execute the process of generating the light distribution pattern information PTN and the abnormal light distribution pattern information AbPTN.
  • the first arithmetic processing unit 8 that receives the image information IMG with a parallel processing type arithmetic device, the light distribution control device 6 can flexibly respond to changes in the imaging device 4 . Further, by interposing the first arithmetic processing unit 8 between the imaging device 4 and the second arithmetic processing unit 10, the first arithmetic processing unit 8 converts the image information IMG of various formats into the light shielded area information SHD of the fixed format. , and sent to the second arithmetic processing unit 10 . As a result, the second arithmetic processing unit 10 can execute the process of generating the light distribution pattern information PTN without being affected by the specification change of the imaging device 4 .
  • the range in which the control design is affected by the change of the imaging device 4 can be easily changed in the hardware design. can be limited to the first arithmetic processing unit 8.
  • the first arithmetic processing unit 8 can cope with the change of the imaging device 4, the flexibility of changing the imaging device 4 can be increased.
  • the vehicle ECU 300 may be frequently changed such as addition of types of light distribution modes and addition of types of system abnormalities to be detected.
  • the communication specifications between each of the vehicle ECU 300, the optical unit 2, and the imaging device 4 and the light distribution control device 6 may be changed.
  • Such a system change can be easily dealt with by changing the software design of the sequential processing arithmetic unit. Therefore, by configuring the third arithmetic processing unit 12, which receives the light distribution mode information MOD, which is susceptible to system changes, in other words, highly dependent on the vehicle system, with a sequential processing arithmetic unit, the light distribution control apparatus 6 can flexibly respond to system changes.
  • the light distribution control device 6 can be flexibly adapted to system changes. It is possible to correspond.
  • the processing executed by the third arithmetic processing unit 12 and the fourth arithmetic processing unit 14 may include conditional branching. Therefore, by constructing the third arithmetic processing unit 12 and the fourth arithmetic processing unit 14 with sequential processing type arithmetic units, consumption of resources required for execution of processing can be reduced compared to the case of forming with parallel processing type arithmetic units. can be suppressed.
  • a parallel processing type arithmetic unit does not easily adapt to system changes of the vehicle ECU 300 compared to a sequential processing type arithmetic unit.
  • the image information IMG and the position information POS input to the first arithmetic processing unit 8 are less dependent on the vehicle system and less susceptible to system changes. Therefore, there is no problem even if the first arithmetic processing unit 8 is configured by a parallel processing type arithmetic device. In this way, by changing the type of integrated circuit that receives information according to the characteristics of the input information, the performance and usability of the light distribution control device 6 can be improved.
  • the image information IMG is directly input from the imaging device 4 and the position information POS is directly input from the vehicle ECU 300 to the first arithmetic processing unit 8 .
  • the light distribution mode information MOD is directly input to the third arithmetic processing unit 12 from the vehicle ECU 300 .
  • data transfer between the first arithmetic processing unit 8 and the third arithmetic processing unit 12 is reduced compared to the case where information is sent from one of the first arithmetic processing unit 8 and the third arithmetic processing unit 12 to the other. Processing and components (such as terminals for voltage conversion) required for transfer can be omitted. Therefore, complication of the structure of the light distribution control device 6 can be suppressed.
  • the process of generating unit information UPTN executed by the fifth arithmetic processing unit 16 is a standard process without conditional branching. Therefore, by configuring the fifth arithmetic processing unit 16 with a parallel processing type arithmetic device, it is possible to generate the unit information UPTN at high speed and with high time accuracy.
  • the light distribution control device 6 can flexibly respond to changes in the optical unit 2 by configuring the fifth arithmetic processing section 16 that generates the unit information UPTN with a parallel processing type arithmetic device. Further, by interposing the fifth arithmetic processing section 16 between the optical unit 2 and the second arithmetic processing section 10, the light distribution pattern information PTN in the fixed format is processed by the fifth arithmetic processing section 16 suitable for the optical unit 2. It can be converted into unit information UPTN in the format and sent to the optical unit 2 . As a result, the second arithmetic processing section 10 can execute the process of generating the light distribution pattern information PTN without being affected by the specification change of the optical unit 2 .
  • the fifth arithmetic processing unit 16 interposing the fifth arithmetic processing unit 16 between the optical unit 2 and the second arithmetic processing unit 10, it is possible to easily change the hardware design by reducing the range in which the control design is affected by the change of the optical unit 2. can be limited to the fifth arithmetic processing unit 16 .
  • the optical unit 2 can be changed by the fifth arithmetic processing section 16, the degree of freedom in changing the optical unit 2 can be increased.
  • a parallel processing arithmetic unit is an integrated circuit suitable for executing routine processing, and starts processing at a fixed cycle.
  • a sequential processing arithmetic device can flexibly change the timing of starting processing. Therefore, by configuring the sixth arithmetic processing unit 18 with a sequential processing type arithmetic device, it is possible to more easily execute fail-safe control that makes the transmission timing of the imaging control signal TRG variable. In other words, compared to the case where the imaging control signal TRG is periodically transmitted by the parallel processing arithmetic unit, the imaging control signal TRG can be transmitted earlier, and thus the light distribution pattern for abnormal conditions can be formed earlier. be able to.
  • FIG. 2 is a timing chart of light distribution control executed by the light distribution control device 6 according to the embodiment during normal operation.
  • FIG. 3A is a timing chart of light distribution control executed by the light distribution control device 6 according to the embodiment when an abnormality is detected.
  • FIG. 3B is a timing chart of light distribution control executed by the light distribution control device according to the reference example when an abnormality is detected.
  • the first FPGA corresponds to the first arithmetic processing unit 8.
  • FIG. The second CPU corresponds to the second arithmetic processing section 10 .
  • the third CPU corresponds to the third arithmetic processing section 12 .
  • the fourth CPU corresponds to the fourth arithmetic processing section 14 .
  • the fifth FPGA corresponds to the fifth arithmetic processing section 16 .
  • the sixth CPU corresponds to the sixth arithmetic processing section 18 .
  • the sixth arithmetic processing unit 18 is configured by an FPGA, and is displayed as sixth FPGA in FIG. 3B.
  • the first FPGA, the second to fourth CPUs, and the fifth FPGA in FIG. 3(B) are the same as in FIGS. 2 and 3(A).
  • PTN2 and “PTN3” are displayed in the row of the second CPU in order to distinguish the light distribution pattern information PTN generated in each period by the second arithmetic processing unit 10 from each other.
  • UPTN2 and “UPTN3” are displayed in the row of the fifth FPGA in order to distinguish the unit information UPTN generated in each period by the fifth arithmetic processing section 16 from each other.
  • “PTN1” in the optical unit row means that the optical unit 2 forms a light distribution pattern corresponding to the light distribution pattern information PTN1.
  • PTN2 means that the optical unit 2 forms a light distribution pattern corresponding to the light distribution pattern information PTN2.
  • the sixth arithmetic processing unit 18 when an abnormality in the vehicle ECU 300 or the like is not detected, the sixth arithmetic processing unit 18 periodically generates an imaging control signal TRG and sends it to the imaging device 4 .
  • the third arithmetic processing unit 12 also receives light distribution mode information MOD (not shown) from the vehicle ECU 300 and periodically sends basic light distribution pattern information BPTN to the second arithmetic processing unit 10 .
  • the imaging device 4 Upon receiving the imaging control signal TRG, the imaging device 4 generates image information IMG and sends it to the first arithmetic processing section 8 . Also, the vehicle ECU 300 repeatedly sends the position information POS to the first arithmetic processing unit 8 (not shown).
  • the first arithmetic processing unit 8 Upon receiving the image information IMG and the position information POS, the first arithmetic processing unit 8 generates light shielding area information SHD and sends it to the second arithmetic processing unit 10 .
  • the second arithmetic processing unit 10 Upon receiving the light shielding area information SHD and the basic light distribution pattern information BPTN, the second arithmetic processing unit 10 generates light distribution pattern information PTN2 and sends it to the fifth arithmetic processing unit 16 .
  • the fifth arithmetic processing section 16 Upon receiving the light distribution pattern information PTN2, the fifth arithmetic processing section 16 generates unit information UPTN2 and sends it to the optical unit 2. Further, the fifth arithmetic processing section 16 outputs the timing information TIM to the sixth arithmetic processing section 18 together with the output of the unit information UPTN2.
  • the optical unit 2 Upon receiving the unit information UPTN2, the optical unit 2 switches the light distribution pattern corresponding to the light distribution pattern information PTN1 formed so far to a light distribution pattern corresponding to the light distribution pattern information PTN2.
  • One control cycle ends at the timing when the light distribution pattern is switched.
  • the sixth arithmetic processing unit 18 sends the imaging control signal TRG to the imaging device 4 . As a result, the front area is imaged by the imaging device 4 under the formation of the light distribution pattern according to the light distribution pattern information PTN2. After that, the same processing is repeated.
  • the fourth arithmetic processing unit 14 detects the occurrence of the abnormality, generates the setting control signal CFG, and sends it to the second arithmetic processing unit 10 .
  • the fourth arithmetic processing unit 14 also generates a transmission control signal SND and sends it to the sixth arithmetic processing unit 18 .
  • the sixth arithmetic processing unit 18 Upon receiving the transmission control signal SND, the sixth arithmetic processing unit 18 generates the imaging control signal TRG and sends it to the imaging device 4 without waiting for reception of the timing information TIM. Therefore, the imaging control signal TRG is sent to the imaging device 4 earlier than when it is normally sent to the imaging device 4 at the start of the next control cycle.
  • the imaging device 4 Upon receiving the imaging control signal TRG, the imaging device 4 generates image information IMG and sends it to the first arithmetic processing section 8 .
  • the first arithmetic processing unit 8 Upon receiving the image information IMG and the position information POS, the first arithmetic processing unit 8 generates light shielding area information SHD and sends it to the second arithmetic processing unit 10 .
  • the second arithmetic processing unit 10 that receives the setting control signal CFG generates the abnormal light distribution pattern information AbPTN and sends it to the fifth arithmetic processing unit 16 when receiving the light shielding area information SHD.
  • the fifth arithmetic processing unit 16 Upon receiving the abnormal light distribution pattern information AbPTN, the fifth arithmetic processing unit 16 generates unit information UAbPTN and sends it to the optical unit 2 .
  • the optical unit 2 switches the light distribution pattern corresponding to the light distribution pattern information PTN2 formed so far to a light distribution pattern corresponding to the light distribution pattern
  • the sixth arithmetic processing unit 18 when the sixth arithmetic processing unit 18 is configured by a parallel processing type arithmetic device such as FPGA, the sixth arithmetic processing unit 18 generates the imaging control signal TRG at a fixed cycle. and sent to the imaging device 4. Therefore, even if the fourth arithmetic processing unit 14 sends the transmission control signal SND to the sixth arithmetic processing unit 18, the transmission of the imaging control signal TRG is not hastened. Therefore, the formation of the light distribution pattern according to the abnormal light distribution pattern information AbPTN is delayed compared to the case where the sixth arithmetic processing unit 18 is composed of a sequential processing type arithmetic device.
  • a parallel processing type arithmetic device such as FPGA
  • each integrated circuit constituting the first to sixth arithmetic processing units 8 to 18 is mounted on a common wiring substrate.
  • the first arithmetic processing unit 8 to the sixth arithmetic processing unit 18 is integrated into one board, it is possible to increase the communication speed between the respective arithmetic processing units. Also, the size and cost of the light distribution control device 6 can be reduced.
  • the first arithmetic processing unit 8 and the fifth arithmetic processing unit 16 are composed of separate parallel processing type arithmetic units, but may be composed of one parallel processing type arithmetic unit.
  • the second arithmetic processing unit 10 the third arithmetic processing unit 12, the fourth arithmetic processing unit 14 and the sixth arithmetic processing unit 18 are composed of separate sequential processing arithmetic units, two or more of these are It may be composed of one sequential processing type arithmetic unit.
  • the first arithmetic processing unit 8 configured by a parallel processing type arithmetic device receives the image information IMG and the position information POS of the preceding vehicle, and controls the light. Generate area information SHD.
  • the second arithmetic processing unit 10 configured by a sequential processing type arithmetic device receives the light shielding area information SHD and the basic light distribution pattern BPTN and generates the light distribution pattern information PTN.
  • the usability of the light distribution control device 6 can be improved.
  • the latency of each process in light distribution control can be reduced.
  • the third arithmetic processing unit 12 configured by a sequential processing type arithmetic device receives the light distribution mode information MOD and generates the basic light distribution pattern information BPTN.
  • the fourth processing unit 14 configured by a sequential processing type processing device detects an abnormality related to at least one of the vehicle ECU 300, the optical unit 2 and the imaging device 4, and outputs the setting control signal CFG. and a transmission control signal SND. This makes it possible to flexibly cope with changes in the vehicle system. Therefore, the usability of the light distribution control device 6 can be improved.
  • the fifth arithmetic processing unit 16 configured by a parallel processing type arithmetic device generates the unit information UPTN. This makes it possible to flexibly cope with changes in the specifications of the optical unit 2 . Therefore, the usability of the light distribution control device 6 can be improved. In addition, processing latency in light distribution control can be reduced.
  • the sixth arithmetic processing unit 18 configured by a sequential processing arithmetic device generates the imaging control signal TRG. This makes it possible to flexibly change the imaging timing of the imaging device 4 and the switching timing of the light distribution pattern. Therefore, the usability of the light distribution control device 6 can be improved. Moreover, when an abnormality occurs in the vehicle ECU 300 or the like, the fail-safe control can be executed earlier. That is, it is possible to improve the responsiveness of the light distribution control device 6 to the occurrence of an abnormality.
  • a first arithmetic processing unit (8) receives image information (IMG) in front of the vehicle from an imaging device (4), receives position information (POS) of a vehicle ahead from a vehicle ECU (300), and determines a light shielding area for the vehicle ahead. )and, A second operation that receives the information (SHD) of the light shielding area from the first arithmetic processing unit (8), synthesizes the light shielding area with the basic light distribution pattern (BPTN), and determines the light distribution pattern to be formed by the optical unit (2).
  • IMG image information
  • POS position information
  • BPTN basic light distribution pattern
  • the first arithmetic processing unit (8) is composed of a parallel processing type arithmetic device
  • the second arithmetic processing unit (10) is composed of a sequential processing arithmetic unit, A light distribution control device (6).
  • the light distribution mode information (MOD) is received from the vehicle ECU (300), the basic light distribution pattern is determined according to the light distribution mode information (MOD), and the basic light distribution pattern information (BPTN) is sent to the second arithmetic processing unit (10 ), further comprising a third arithmetic processing unit (12) for sending to
  • the third arithmetic processing unit (12) is composed of a sequential processing arithmetic unit, A light distribution control device (6) according to the first item.
  • Image information is directly input from the imaging device (4) to the first arithmetic processing unit (8), and position information (POS) is directly input from the vehicle ECU (300), Light distribution mode information (MOD) is directly input to the third arithmetic processing unit (12) from the vehicle ECU (300).
  • the light distribution control device (6) according to the second item.
  • CFG setting control signal
  • the fourth arithmetic processing unit (14) is composed of a sequential processing arithmetic unit, A light distribution control device (6) according to any one of the first to third items.
  • the second arithmetic processing unit (10) is composed of a sequential processing arithmetic unit,
  • the fifth arithmetic processing unit (16) is composed of a parallel processing type arithmetic device, A light distribution control device (6).
  • a sixth arithmetic processing unit that sends an imaging control signal (TRG) instructing imaging to an imaging device (4) that generates image information (IMG) in accordance with transmission of unit information (UPTN) to the optical unit (2) further comprising (18),
  • the sixth arithmetic processing unit (18) is composed of a sequential processing arithmetic unit, The light distribution control device (6) according to the sixth item.
  • An abnormality related to at least one of a vehicle ECU (300), an optical unit (2), and an imaging device (4) is detected, and transmission of an imaging control signal (TRG) independent of transmission timing of unit information (UPTN) is performed.
  • the fourth arithmetic processing unit (14) is composed of a sequential processing arithmetic unit, A light distribution control device (6) according to the seventh item.
  • the present invention can be used for light distribution control devices and vehicle lamp systems.
  • Vehicle lighting system 2 optical unit, 4 imaging device, 6 light distribution control device, 8 first processing unit, 10 second processing unit, 12 third processing unit, 14 fourth processing unit, 16th 5 arithmetic processing unit, 18 sixth arithmetic processing unit, 300 vehicle ECU.

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PCT/JP2022/041191 2021-11-10 2022-11-04 配光制御装置および車両用灯具システム Ceased WO2023085213A1 (ja)

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Publication number Priority date Publication date Assignee Title
WO2020059799A1 (ja) * 2018-09-19 2020-03-26 株式会社小糸製作所 車両用灯具
JP2020104561A (ja) * 2018-12-26 2020-07-09 株式会社小糸製作所 車両用灯具システム、車両用灯具の制御装置および車両用灯具の制御方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020059799A1 (ja) * 2018-09-19 2020-03-26 株式会社小糸製作所 車両用灯具
JP2020104561A (ja) * 2018-12-26 2020-07-09 株式会社小糸製作所 車両用灯具システム、車両用灯具の制御装置および車両用灯具の制御方法

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