WO2023090330A1 - 灯具システムおよびランプのコントローラおよび制御方法 - Google Patents

灯具システムおよびランプのコントローラおよび制御方法 Download PDF

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Publication number
WO2023090330A1
WO2023090330A1 PCT/JP2022/042449 JP2022042449W WO2023090330A1 WO 2023090330 A1 WO2023090330 A1 WO 2023090330A1 JP 2022042449 W JP2022042449 W JP 2022042449W WO 2023090330 A1 WO2023090330 A1 WO 2023090330A1
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WO
WIPO (PCT)
Prior art keywords
pitch angle
pixels
road surface
vehicle
controller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/042449
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English (en)
French (fr)
Japanese (ja)
Inventor
大樹 角谷
晴行 小澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Priority to CN202280076583.9A priority Critical patent/CN118265633A/zh
Priority to JP2023562353A priority patent/JPWO2023090330A1/ja
Priority to EP22895611.6A priority patent/EP4434816A4/en
Publication of WO2023090330A1 publication Critical patent/WO2023090330A1/ja
Priority to US18/666,130 priority patent/US20240302018A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B60Q1/06—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 adjustable, e.g. remotely-controlled from inside vehicle
    • B60Q1/08—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 adjustable, e.g. remotely-controlled from inside vehicle automatically
    • B60Q1/10—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 adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution
    • B60Q1/115—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 adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution by electric means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • 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
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10—Indexing codes relating to particular vehicle conditions
    • B60Q2300/13—Attitude of the vehicle body
    • B60Q2300/132—Pitch
    • 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
    • B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
    • B60Q2400/50—Projected symbol or information, e.g. onto the road or car body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/14—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having vertical cut-off lines; specially adapted for adaptive high beams, i.e. wherein the beam is broader but avoids glaring other road users
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/60—Projection of signs from lighting devices, e.g. symbols or information being projected onto the road

Definitions

  • the present disclosure relates to vehicle lamps.
  • Vehicle lamps can generally be switched between low beam and high beam.
  • the low beam illuminates the vicinity of the vehicle with a predetermined illuminance, and is used mainly when driving in an urban area.
  • high beams illuminate a wide area ahead and far away with relatively high illuminance, and are mainly used when driving at high speed on roads with few oncoming or preceding vehicles. Therefore, although the high beam is superior to the low beam in the driver's visibility, there is a problem in that it gives glare to the driver of the vehicle and pedestrians present in front of the vehicle.
  • ADB Adaptive Driving Beam
  • ADB technology detects preceding vehicles in front of the vehicle, oncoming vehicles (generally referred to as forward vehicles), pedestrians and signs (hereinafter collectively referred to as targets), and shades or dims the area corresponding to the vehicle. etc., to reduce the glare given to the vehicle.
  • a technology has been proposed that uses ramps with high spatial resolution to draw figures, characters, etc. on the road surface for driving support.
  • Fig. 1 is a diagram for explaining problems that occur in road surface rendering.
  • the posture (pitch angle) ⁇ p of the vehicle body dynamically changes according to steps and unevenness of the road surface while the vehicle is running.
  • the optical axis of the beam BM for drawing the road surface changes, and the irradiation angle (incident angle) with respect to the road surface changes. If the irradiation angle with respect to the road surface changes, the drawing position will change.
  • the pitch angle changes at high speed, the figure drawn on the road surface blurs and the visibility decreases. If the change in pitch angle is slow, there is a risk of annoying the driver and fellow passengers of the vehicle and inducing car sickness.
  • the posture of the car body can also change statically depending on the number of passengers and the weight of luggage. If the illumination angle with respect to the road surface changes due to changes in the posture of the vehicle body, the graphics drawn on the road surface may be distorted, reducing visibility.
  • the present disclosure has been made in such a situation, and one of its exemplary purposes is to improve the visibility of road surface drawing.
  • the lighting system includes a variable light distribution lamp that includes a plurality of individually controllable pixels and irradiates the road surface with a beam having a light distribution pattern according to the state of the plurality of pixels, and is provided so that the pitch angle of the vehicle body can be detected. and a controller for controlling ON/OFF of the plurality of pixels according to the pattern to be drawn on the road surface and for correcting the state of the plurality of pixels according to the pitch angle.
  • a controller for a variable light distribution lamp that includes a plurality of individually controllable pixels and irradiates a road surface with a beam having a light distribution pattern according to the states of the plurality of pixels.
  • the controller is configured to be capable of executing a process of turning on and off a plurality of pixels according to the pattern to be drawn on the road surface, and a process of correcting the state of the plurality of pixels according to the pitch angle of the vehicle body. be.
  • Yet another aspect of the present disclosure is a control method for a variable light distribution lamp that includes a plurality of individually controllable pixels and irradiates a road surface with a beam having a light distribution pattern according to the states of the plurality of pixels.
  • the control method includes the steps of detecting the pitch angle of the vehicle body, controlling the on/off of a plurality of pixels according to the pattern to be drawn on the road surface, and correcting the state of the plurality of pixels according to the pitch angle. , provided.
  • the visibility of road surface drawing can be improved.
  • FIG. 1 is a block diagram of a lighting system according to an embodiment
  • FIG. FIGS. 3A and 3B are diagrams for explaining the pitch angle ⁇ p of the vehicle body. It is a functional block diagram of a controller. It is a figure which shows an example of the driving
  • 6 is a diagram showing waveforms of a dynamic pitch angle ⁇ d and a correction amount ⁇ y corresponding to the driving scene of FIG. 5
  • FIG. 7A and 7B are diagrams for explaining the operation of the lamp system according to the embodiment.
  • FIGS. 8A and 8B are diagrams for explaining correction of the ON pixel group PG_ON.
  • a lighting system includes a variable light distribution lamp that includes a plurality of individually controllable pixels, irradiates a road surface with a beam having a light distribution pattern according to the state of the plurality of pixels, and a pitch angle of a vehicle body.
  • a sensor provided to be detectable, and a controller for controlling ON/OFF of a plurality of pixels according to a pattern to be drawn on a road surface and correcting the state of the plurality of pixels according to a pitch angle are provided.
  • the pattern can be drawn at the same position (relative position to the vehicle) as viewed from the vehicle regardless of changes in the pitch angle. Thereby, visibility can be improved.
  • the controller may correct the states of the plurality of pixels according to dynamic changes in the pitch angle of the vehicle body while the vehicle is running. As a result, since the pattern drawing position is stabilized while the vehicle is running, blurring of the image can be prevented and visibility can be improved.
  • the controller may correct the states of the plurality of pixels according to the pitch angle of the vehicle body while the vehicle is stopped. Thereby, the distortion of the pattern drawn on the road surface can be reduced.
  • the controller may vertically shift the position of the ON-state pixel group among the plurality of pixels according to the pitch angle. This makes it possible to stabilize the drawing position with simple processing.
  • the controller may change the arrangement of the ON-state pixel group among the plurality of pixels according to the pitch angle. Thereby, the distortion of the pattern drawn on the road surface can be reduced.
  • the pitch angle dynamic component may include frequencies higher than 0.5 Hz.
  • the senor may include a gyro sensor.
  • a dynamic pitch angle can be obtained by obtaining an angular velocity in the pitch direction with a gyro sensor and integrating it.
  • a controller is a controller for a variable light distribution lamp that includes a plurality of individually controllable pixels and irradiates a road surface with a beam having a light distribution pattern according to the states of the plurality of pixels. It is configured to be able to execute a process of setting ON/OFF of a plurality of pixels in accordance with a pattern to be drawn and a process of correcting the state of a plurality of pixels in accordance with the pitch angle of the vehicle body.
  • a state in which member A is connected to member B refers to a case in which member A and member B are physically directly connected, and that member A and member B are electrically connected to each other. It also includes the case of being indirectly connected through other members that do not substantially affect the physical connection state or impair the functions and effects achieved by their combination.
  • the state in which member C is provided between member A and member B refers to the case where member A and member C or member B and member C are directly connected, as well as the case where they are electrically connected. It also includes the case of being indirectly connected through other members that do not substantially affect the physical connection state or impair the functions and effects achieved by their combination.
  • FIG. 2 is a block diagram of the lamp system 100 according to the embodiment.
  • the lamp system 100 is a road marking lamp that is mounted on an automobile and illuminates the road surface in front of the vehicle with a beam.
  • the lamp system 100 includes a high-definition lamp unit 110, a sensor 120 and a controller 200.
  • the high-definition lamp unit 110 is a variable light distribution lamp configured to irradiate the road surface in front of the vehicle with a beam.
  • the high definition lamp unit 110 may cover part/all of the low beam area.
  • the high-definition lamp unit 110 includes a plurality of individually controllable pixels PIX, and irradiates a beam (called a road surface illumination beam) BM having a light distribution pattern according to the state of the plurality of pixels PIX.
  • high-definition lamp unit 110 includes light-emitting element array 112 and illumination optical system 114 .
  • An LED array can be used as the light emitting element array 112 .
  • the brightness of each pixel PIX may be controllable with two gradations of ON and OFF, or may be controllable with multiple gradations.
  • PWM dimming can be used to achieve multiple gradations. may be expressed.
  • the irradiation optical system 114 projects the output light of the light emitting element array 112 forward of the vehicle.
  • the irradiation optical system 114 may be a lens optical system, a reflective optical system, or a combination thereof.
  • the road surface 10 is shown in FIG. A pattern (figure) PTN is formed on the road surface 10 by the road surface writing beam BM emitted by the high-definition lamp unit 110 .
  • the pattern PTN may be graphic information or character information, and its shape and meaning are not limited in the present disclosure.
  • the light distribution pattern PTN is the beam intensity distribution on the road surface 10 and is based on the on/off pattern of the plurality of pixels PIX of the light emitting element array 112 .
  • the correspondence between the position of a certain pixel PIX and the illuminated portion of the road surface 10 corresponding to that pixel is determined by the illumination optical system 114, and is a mirror image relationship (horizontal inversion), vertical inversion, or vertical and horizontal inversion.
  • the vehicle's front-rear tilt angle (vehicle posture) changes according to the front-rear weight balance.
  • the inclination angle also changes depending on the unevenness and steps of the road surface while the vehicle is running.
  • the tilt angle in the longitudinal direction corresponds to the rotation of the vehicle body about the horizontal axis extending in the left-right direction, and is referred to as the pitch angle (also referred to as the attitude angle) ⁇ p.
  • the sensor 120 is provided so as to be able to detect the pitch angle ⁇ p of the vehicle body on which the lighting system 100 is mounted.
  • the controller 200 receives drawing information INFO regarding the pattern PTN to be drawn on the road surface from the vehicle.
  • the drawing information INFO can include data regarding the type and shape of the pattern. Also, the drawing position may be changed according to the vehicle speed or the like, in which case the drawing information INFO may also include data regarding the drawing position. Drawing position means a position relative to the vehicle.
  • the controller 200 turns on the pixel group (on pixel group) PG_ON corresponding to the pattern PTN among the plurality of pixels PIX of the light emitting element array 112, and turns off the rest.
  • the high-definition lamp unit 110 and controller 200 may be built into the headlamp.
  • the sensor 120 may be provided on the headlamp side or may be provided on the vehicle side.
  • the headlamp side it may be built in the housing (lamp body) of the headlamp, or may be externally attached to the lamp body.
  • the vehicle side it may be arranged inside the passenger compartment or outside the passenger compartment, for example, inside the engine room.
  • the controller 200 corrects the drawing position of the pattern PTN in accordance with variations in the pitch angle ⁇ p caused by various factors while the vehicle is stationary and running.
  • FIGS. 3(a) and 3(b) are diagrams for explaining the pitch angle ⁇ p of the vehicle body.
  • FIG. 3(a) shows the pitch angle ⁇ p when the vehicle is stopped.
  • the pitch angle ⁇ p when the vehicle is stationary is defined as a static pitch angle ⁇ s. Since the static pitch angle ⁇ s indicates the attitude of the vehicle when the vehicle is stopped, it is also referred to as the stationary vehicle attitude angle.
  • the static pitch angle ⁇ s is determined according to the number of passengers, the riding position, the weight of luggage in the luggage compartment, the hardness of the front and rear suspensions, and the like.
  • the angle formed by the straight line 12 parallel to the road surface 10 and the reference line 22 of the vehicle body 20 is taken as the pitch angle ⁇ p, and the upward direction of the reference line 22 (nose-up direction) is taken as positive. It is assumed that
  • FIG. 3(b) shows the pitch angle ⁇ p while the vehicle is running.
  • the pitch angle ⁇ p while the vehicle is running can be grasped as the sum of the static pitch angle ⁇ s and the dynamic component (also referred to as the dynamic pitch angle or pitch angle fluctuation amount) ⁇ d.
  • the dynamic pitch angle ⁇ d can include the following components. ⁇ (i) Nose up due to vehicle acceleration, nose down due to deceleration ⁇ (ii) Changes in vehicle load (weight balance) caused by road surface inclination ⁇ (iii) Fast vehicle vibration caused by uneven road surface
  • vibrations of the vehicle body caused by unevenness of the road surface are generally within the range of 0.5 to 5 Hz, although they depend on the hardness of the suspension and the weight of the vehicle.
  • a sharp vehicle body vibration is 0.9 to 2 Hz.
  • the controller 200 detects the pitch angle ⁇ p of the vehicle body according to the output (detection signal) S1 of the sensor 120 .
  • the pitch angle ⁇ p includes static pitch angle ⁇ s and dynamic pitch angle ⁇ d.
  • the controller 200 moves the position of the ON pixel group PG_ON corresponding to the pattern PTN in the vertical direction according to the pitch angle ⁇ p of the vehicle body.
  • the controller 200 determines the reference position y0 of the ON pixel group PG_ON according to the static pitch angle ⁇ s obtained while the vehicle is stopped.
  • the ON pixel group PG_ON is vertically shifted from the reference position y0 .
  • the senor 120 includes a gyro sensor.
  • the gyro sensor may be attached in any direction, but is preferably installed so that one of its detection axes faces the left-right horizontal direction of the vehicle body, and generates a detection signal S1 indicating the angular velocity ⁇ p of rotational motion around this detection axis.
  • the gyro sensor may be triaxial or uniaxial.
  • a gyro sensor enables detection of a dynamic pitch angle ⁇ d of 0.5 to 5 Hz.
  • the sensor 120 may include an acceleration sensor in addition to the gyro sensor.
  • the acceleration sensor can detect the acceleration (ie, gravitational plasticity) when the vehicle is stationary, ie, when the motion acceleration of the vehicle is zero. Based on the gravitational acceleration, it can be used to detect the vehicle stop posture angle ⁇ s.
  • the static pitch angle ⁇ s may be detected by a vehicle height sensor attached to the suspension.
  • the controller 200 is an ECU (Electronic Control Unit) that integrates functions related to optical axis correction, and performs processing related to dynamic leveling.
  • the controller 200 may be an ECU dedicated to leveling (also referred to as a leveling ECU), an ECU integrated with a controller having other functions, or divided into a plurality of ECUs. good.
  • the functions of the controller 200 may be realized by software processing, hardware processing, or a combination of software processing and hardware processing. Specifically, software processing is implemented by combining processors (hardware) such as CPU (Central Processing Unit), MPU (Micro Processing Unit), and microcontrollers, and software programs executed by the processor (hardware). . Controller 200 may be a combination of multiple processors (microcontrollers).
  • hardware processing is implemented by hardware such as ASIC (Application Specific Integrated Circuit), controller IC, and FPGA (Field Programmable Gate Array).
  • ASIC Application Specific Integrated Circuit
  • controller IC controller IC
  • FPGA Field Programmable Gate Array
  • the controller 200 detects the dynamic component ⁇ d of the pitch angle ⁇ p while the vehicle is running by integrating the angular velocity ⁇ p indicated by the detection signal S1.
  • the dynamic component ⁇ d here can be regarded as a component included in a predetermined frequency band higher than 0.5 Hz among variations in the pitch angle ⁇ p.
  • components included in a predetermined frequency band are subject to correction as dynamic components.
  • the predetermined frequency band can be set, for example, within a range of approximately 0.5 Hz to 5 Hz. Which frequency band is to be corrected may be determined based on the stiffness of the suspension, the mass of the vehicle body, and the like.
  • the controller 200 moves the position y of the ON pixel group in the vertical direction with reference to the reference position y0 according to the dynamic component ⁇ d of the pitch angle ⁇ p of the running vehicle body. Specifically, the controller 200 moves the ON pixel group PG_ON from the reference position y0 to one of the vertical directions in correspondence with the positive dynamic pitch angle ⁇ d, and , the ON pixel group PG_ON is moved from the reference position y0 to the other in the vertical direction.
  • the sign of the dynamic pitch angle ⁇ d and the direction of pixel shift are determined according to the optical system of the high definition lamp unit 110 . As a result, the pattern PTN on the road surface moves toward the vehicle in response to a positive dynamic pitch angle ⁇ d, and the pattern PTN on the road surface moves toward the vehicle in response to a negative dynamic pitch angle ⁇ d. will move away from
  • the number of pixels to shift the ON pixel group PG_ON for a given fluctuation range of the pitch angle ⁇ p can be determined geometrically. Let ⁇ y be the pixel shift amount.
  • FIG. 4 is a functional block diagram of the controller 200.
  • FIG. FIG. 4 shows blocks relating to the correction of the dynamic pitch angle ⁇ p.
  • the controller 200 includes a pitch angle calculator 210 and a drawing position corrector 220 .
  • the pitch angle calculator 210 detects the dynamic component ⁇ d of the pitch angle ⁇ p based on the output of the sensor 120 .
  • the pitch angle calculator 210 integrates the angular velocity ⁇ p indicated by the detection signal S1.
  • the pitch angle calculation unit 210 calculates the dynamic pitch angle ⁇ d by performing calculation processing on the integrated value as necessary. This arithmetic processing can include filtering (band limiting processing), moving average processing, and the like.
  • the drawing position correction unit 220 vertically moves the ON pixel group PG_ON based on the dynamic pitch angle ⁇ d.
  • the drawing position corrector 220 includes a correction amount calculator 222 and a corrector 224 .
  • the correction amount calculation unit 222 calculates the movement amount (correction amount ⁇ y) of the ON pixel group PG_ON based on the dynamic pitch angle ⁇ d.
  • the light-emitting element array 112 has an interface for inputting image data that designates on/off (or luminance) of a plurality of pixels PIX.
  • the correction unit 224 may shift the position of the ON pixel group PG_ON corresponding to the pattern PTN included in the image data up and down by the correction amount ⁇ y. That is, the correction unit 224 moves the position of the ON pixel group included in the image data upward and downward with respect to the predetermined position y0 so as to cancel the dynamic component ⁇ d of the pitch angle ⁇ p.
  • the configuration of the lamp system 100 is as described above. Next, the operation will be explained.
  • FIG. 5 is a diagram showing an example of a vehicle traveling scene.
  • the vehicle 30 is traveling from left to right on the paper surface, and shows how it climbs over a step 14 on the road surface 10 .
  • FIG. 5 shows attitudes of the vehicle 30 at a plurality of times t 0 to t 4 . Each time t 0 to t 4 indicates the following states.
  • Time t0 The vehicle is running in front of the step 14
  • Time t1 The front wheels have run over the step 14
  • Time t2 The front wheels have run over the step 14
  • Time t3 The rear wheels have run over the step 14
  • State Time t 4 The state where the rear wheels have run over the step 14
  • the dynamic pitch angle ⁇ d is 0 at times t 0 , t 2 and t 4 .
  • the dynamic pitch angle ⁇ d at time t1 takes a positive value ⁇ d1
  • the dynamic pitch angle ⁇ d at time t3 takes a negative value ⁇ d3 .
  • FIG. 6 is a diagram showing the waveform of the dynamic pitch angle ⁇ d and the waveform of the correction amount ⁇ y corresponding to the driving scene of FIG.
  • the dynamic pitch angle ⁇ d swings in the positive direction, swings in the negative direction, and eventually returns to 0.
  • a correction amount ⁇ y for the ON pixel group PG_ON is generated so as to cancel the fluctuation of the dynamic pitch angle ⁇ d.
  • FIG. 7(a) and (b) are diagrams for explaining the operation of the lamp system 100 according to the embodiment.
  • FIG. 7(a) shows changes in the vehicle posture, that is, the pitch angle ⁇ p.
  • the positions of the ON pixel group PG_ON of the high-definition lamp unit 110 are corrected in response to changes in the pitch angle ⁇ p.
  • the irradiation angle (incidence angle) of the road surface drawing beam BM with respect to the road surface 10 is kept constant, and the drawing position (relative position with respect to the vehicle) of the pattern PTN is kept constant regardless of the pitch angle ⁇ p.
  • FIG. 7B the pattern PTN drawn on the road surface 10 is drawn at the same position regardless of changes in the pitch angle .theta.p, so blurring is suppressed and visibility can be improved.
  • the controller 200 may correct the shape of the ON pixel group PG_ON corresponding to the same pattern PTN according to the pitch angle ⁇ p.
  • FIGS. 8(a) and (b) are diagrams for explaining correction of the ON pixel group PG_ON.
  • black pixels represent the ON pixel group PG_ON.
  • FIGS. 8A and 8B show ON pixel groups PG_ON corresponding to different pitch angles ⁇ p, the positions y are different, and the layout shapes of the ON pixel groups PG_ON are also different. The shape of the ON pixel group PG_ON is corrected so that the pattern drawn on the road surface has the same shape.
  • the controller 200 may determine the reference position y0 of the ON pixel group PG_ON and correct the shape of the ON pixel group PG_ON according to the static pitch angle ⁇ s. Then, the controller 200 may vertically shift the corrected ON pixel group PG_ON according to the dynamic pitch angle ⁇ d.
  • the controller 200 may determine the reference position y0 of the ON pixel group PG_ON according to the static pitch angle ⁇ s.
  • the controller 200 may move the position of the ON pixel group PG_ON from the reference position y0 and correct the shape of the ON pixel group PG_ON according to the dynamic pitch angle ⁇ d.
  • the gyro sensor detects the dynamic component of the pitch angle in the embodiments, the present disclosure is not limited thereto.
  • the dynamic component of the pitch angle may be detected based on a combination of a front vehicle height sensor provided on the front suspension of the vehicle body and a rear vehicle height sensor provided on the rear suspension of the vehicle body.
  • high definition lamp unit 110 may include a light source that produces light having a substantially flat intensity distribution and a spatial light modulator that spatially patterns the light emitted by the light source.
  • Spatial light modulators are exemplified by DMDs (Digital Micromirror Devices) and liquid crystal devices.
  • the method by which the controller 200 vertically shifts the position of the ON pixel group PG_ON is not limited to correcting the image data supplied to the light emitting element array 112 .
  • the light emitting element array 112 may have a pixel shift function.
  • the light-emitting element array 112 may be provided with reference image data and a pixel shift amount ⁇ y.
  • the present disclosure relates to vehicle lamps.
  • SYMBOLS 100... Lamp system, 110... High-definition lamp unit, 112... Light emitting element array, 114... Irradiation optical system, PIX... Pixel, 120... Sensor, 200... Controller, 210... Pitch angle calculation part, 220... Drawing position correction part, 222... Correction amount calculation unit, 224... Correction unit.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Mathematical Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
PCT/JP2022/042449 2021-11-19 2022-11-15 灯具システムおよびランプのコントローラおよび制御方法 Ceased WO2023090330A1 (ja)

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CN202280076583.9A CN118265633A (zh) 2021-11-19 2022-11-15 灯具系统以及灯的控制器及控制方法
JP2023562353A JPWO2023090330A1 (https=) 2021-11-19 2022-11-15
EP22895611.6A EP4434816A4 (en) 2021-11-19 2022-11-15 LIGHTING SYSTEM AND LAMP CONTROL DEVICE AND CONTROL METHOD
US18/666,130 US20240302018A1 (en) 2021-11-19 2024-05-16 Lamp system

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CN120191283B (zh) * 2025-05-27 2025-07-22 常州星宇车灯股份有限公司 一种基于悬架高度调节的双灯投影自适应修正方法和系统

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US20190016256A1 (en) * 2015-09-25 2019-01-17 Audi Ag Projection of a Pre-Definable Light Pattern
WO2020262445A1 (ja) 2019-06-28 2020-12-30 株式会社小糸製作所 灯具システム
JP2021030917A (ja) * 2019-08-26 2021-03-01 株式会社デンソー 表示装置

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US20140267415A1 (en) * 2013-03-12 2014-09-18 Xueming Tang Road marking illuminattion system and method
FR3055431B1 (fr) * 2016-09-01 2019-08-02 Valeo Vision Dispositif de projection d'une image pixelisee
DE102016122066A1 (de) * 2016-11-16 2018-05-17 Automotive Lighting Reutlingen Gmbh Verfahren zur Einstellung der Winkellage der optischen Achse eines Scheinwerfers eines Kraftfahrzeugs und Beleuchtungseinrichtung des Kraftfahrzeugs

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US20190016256A1 (en) * 2015-09-25 2019-01-17 Audi Ag Projection of a Pre-Definable Light Pattern
US20180180246A1 (en) * 2016-12-27 2018-06-28 Lg Electronics Inc. Lamp for vehicle and method for controlling the same
WO2020262445A1 (ja) 2019-06-28 2020-12-30 株式会社小糸製作所 灯具システム
JP2021030917A (ja) * 2019-08-26 2021-03-01 株式会社デンソー 表示装置

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EP4434816A4 (en) 2025-03-12

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