WO2023067977A1 - Système d'éclairage, dispositif de commande, support lisible par ordinateur non transitoire et programme informatique - Google Patents

Système d'éclairage, dispositif de commande, support lisible par ordinateur non transitoire et programme informatique Download PDF

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Publication number
WO2023067977A1
WO2023067977A1 PCT/JP2022/035226 JP2022035226W WO2023067977A1 WO 2023067977 A1 WO2023067977 A1 WO 2023067977A1 JP 2022035226 W JP2022035226 W JP 2022035226W WO 2023067977 A1 WO2023067977 A1 WO 2023067977A1
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Prior art keywords
low
light
illuminated
control device
area
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Application number
PCT/JP2022/035226
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English (en)
Japanese (ja)
Inventor
靖礼 加藤
清隆 望月
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株式会社小糸製作所
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Priority to JP2023555062A priority Critical patent/JPWO2023067977A1/ja
Publication of WO2023067977A1 publication Critical patent/WO2023067977A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • 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
    • 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
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • 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
    • F21W2102/15—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 wherein the light is emitted under L-shaped cut-off lines, i.e. vertical and horizontal cutoff lines
    • 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
    • F21W2102/155—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 inclined and horizontal cutoff lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/20—Electroluminescent [EL] light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

Definitions

  • the present disclosure relates to a lighting system that is mounted on a mobile object and that illuminates an area to be illuminated located in front of the mobile object.
  • the present disclosure also relates to a control device mounted on the mobile body, a computer program executable by a processing unit mounted on the control device, and a non-transitory computer-readable medium storing the computer program.
  • Patent Literature 1 discloses a device that is mounted on a vehicle as an example of a moving body and that illuminates an area to be illuminated located in front of the vehicle.
  • the device is configured to distribute a so-called low beam to a portion of the illuminated area which is located at a relatively short distance from the vehicle.
  • the light distribution pattern formed by the low beam has an upper end shape that defines the boundary between the illuminated area and the non-illuminated area so as not to give glare to vehicles positioned ahead. This shape is called the cutoff line.
  • the device is configured to distribute a so-called high beam to at least a portion of the illuminated area above the cutoff line.
  • the light is distributed to a portion of the illuminated area that is located relatively far from the vehicle, and forward visibility can be improved.
  • the device forms a relatively low-intensity area in a part of the light distribution pattern formed by the high beam. Thus, glare is not given to the object to be illuminated.
  • a first embodiment provided by the present disclosure to meet the first demand is a lighting system that is mounted on a moving object and illuminates an area to be illuminated located in front of the moving object, a first optical system including a spatial light modulator having at least one light source, and forming a low beam pattern having a cut-off line at the upper end in the area to be illuminated using light emitted from the spatial light modulator; , forming a first low-luminance region having a relatively low luminous intensity within the low beam pattern based on detection information indicating the position of a specific object to be illuminated detected within the region to be illuminated, and forming the object and the object to be illuminated; a control device for controlling the operation of the spatial light modulator so as to change at least one of the position and size of the first low-luminance region according to the position relative to the moving object; It has
  • a second embodiment provided by the present disclosure to meet the first demand is a control device mounted on a mobile body, A processing unit that emits light to a spatial light modulator having at least one light source, and uses the light to form a low beam pattern having a cutoff line at the upper end in an illuminated area located in front of the moving object. and, a receiving unit that receives detection information indicating the position of a specific object to be illuminated detected within the illuminated area; and The processing unit forms a first low-luminance region having relatively low luminosity in the low-beam pattern based on the detection information, and the first low-luminance region according to the relative position between the object to be illuminated and the moving object. Operation of the spatial light modulator is controlled to vary at least one of the location and size of the low intensity region.
  • a third embodiment provided by the present disclosure to meet the first demand is a non-transitory computer-readable medium storing a computer program executable by a processing unit of a control device mounted on a mobile object.
  • the control device A spatial light modulator having at least one light source emits light to form a low beam pattern having a cut-off line at the upper end in an illuminated region located in front of the moving object using the light, Receiving detection information indicating the position of a specific object to be illuminated detected within the illuminated area; forming a first low-luminance region having relatively low luminosity in the low-beam pattern based on the detection information, and positioning the first low-luminance region according to a relative position between the object to be illuminated and the moving object; The operation of the spatial light modulator is controlled so as to vary at least one of and magnitude.
  • a fourth embodiment provided by the present disclosure to meet the first demand is a computer program executable by a processing unit of a control device mounted on a mobile body, comprising: By being executed, the control device A spatial light modulator having at least one light source emits light to form a low beam pattern having a cut-off line at the upper end in an illuminated region located in front of the moving object using the light, Receiving detection information indicating the position of a specific object to be illuminated detected within the illuminated area; forming a first low-luminance region having relatively low luminosity in the low-beam pattern based on the detection information, and positioning the first low-luminance region according to a relative position between the object to be illuminated and the moving object; The operation of the spatial light modulator is controlled so as to vary at least one of and magnitude.
  • the shape of the low beam pattern is predetermined so as not to give glare to the illuminated object positioned in front of the moving object.
  • the object to be illuminated which avoids glare, may enter the low beam pattern.
  • the shape of the cut-off line is changed through the formation of the first low-luminance region, or the light distribution state of the low-beam pattern is changed. Control to change is possible. As a result, the degree of suppression of glare that can be given to the object to be illuminated can be increased.
  • a fifth aspect provided by the present disclosure to meet the second demand is a lighting system that is mounted on a moving body and illuminates an area to be illuminated located in front of the moving body, a first optical system that includes at least one light source and uses light emitted from the light source to form a first light distribution pattern in the area to be illuminated; A spatial light modulator having at least one light source is included, and light emitted from the spatial light modulator is used to form a second light distribution pattern that at least partially overlaps with the first light distribution pattern.
  • a second optical system that a control device for controlling the operation of the spatial light modulator so as to form a low luminous intensity region having relatively low luminous intensity in a region where the first light distribution pattern and the second light distribution pattern overlap; It has
  • a sixth aspect provided by the present disclosure to meet the second demand is a control device mounted on a mobile object, A first light distribution formed in an area to be illuminated located in front of the moving body by using light emitted from another light source by emitting light from a spatial light modulator having at least one light source. a processing unit that forms a second light distribution pattern using light emitted from the spatial light modulator so that at least a part of the pattern overlaps, The processing unit controls the operation of the spatial light modulator so as to form a low luminous intensity region with relatively low luminous intensity in the region where the first light distribution pattern and the second light distribution pattern overlap. do.
  • a seventh aspect provided by the present disclosure to meet the second demand is a non-transitory computer-readable medium storing a computer program executable by a processing unit of a control device mounted on a mobile object.
  • the control device A first light distribution formed in an area to be illuminated located in front of the moving body by using light emitted from another light source by emitting light from a spatial light modulator having at least one light source. forming a second light distribution pattern using light emitted from the spatial light modulator so that at least a portion of the pattern overlaps; The operation of the spatial light modulator is controlled so as to form a low luminous intensity area with relatively low luminous intensity in the area where the first light distribution pattern and the second light distribution pattern overlap.
  • An eighth aspect example provided by the present disclosure to meet the second demand is a computer program executable by a processing unit of a control device mounted on a mobile object, By being executed, the control device A first light distribution formed in an area to be illuminated located in front of the moving body by using light emitted from another light source by emitting light from a spatial light modulator having at least one light source. forming a second light distribution pattern using light emitted from the spatial light modulator so that at least a portion of the pattern overlaps; The operation of the spatial light modulator is controlled so as to form a low luminous intensity area with relatively low luminous intensity in the area where the first light distribution pattern and the second light distribution pattern overlap.
  • the light intensity is relatively low in the region where the light intensity is increased by overlapping the first light distribution pattern and the second light distribution pattern. Regions can be formed locally. That is, it is possible to set a low luminous intensity area in which the degree of suppression of glare is locally enhanced while forming a light distribution area with enhanced visibility to a long distance. Since the position and size of the low luminous intensity region can be easily changed by using the spatial light modulator, the degree of freedom in light distribution design in the illumination system can be increased.
  • FIG. 1 illustrates a functional configuration of a lighting system according to a first embodiment
  • 2 illustrates a vehicle in which the lighting system of FIG. 1 is mounted
  • 2 shows an example of the configuration of the spatial light modulator of FIG. 1
  • 4 illustrates a low beam pattern formed by the spatial light modulator of FIG. 3
  • 2 shows an example of the operation of the lighting system of FIG. 1
  • Figure 2 shows another example of the operation of the lighting system of Figure 1
  • 2 shows another example of the configuration of the spatial light modulator of FIG. 1
  • 8 illustrates a low beam pattern formed by the spatial light modulator of FIG. 7
  • Figure 2 shows another example of the operation of the lighting system of Figure 1
  • Figure 2 shows another example of the operation of the lighting system of Figure 1
  • the functional configuration of the lighting system according to the second embodiment is illustrated.
  • FIG. 12 shows an example of the configuration of the spatial light modulator of FIG. 11; 13 illustrates a second light distribution pattern formed by the spatial light modulator of FIG. 12; 12 illustrates an example of the operation of the lighting system of FIG. 11; Figure 12 shows another example of the operation of the lighting system of Figure 11; Figure 12 shows another example of the operation of the lighting system of Figure 11;
  • FIG. 1 illustrates the functional configuration of a lighting system 101 according to the first embodiment.
  • FIG. 2 illustrates a vehicle 20 in which the lighting system 101 is installed.
  • the lighting system 101 is configured to illuminate an illuminated area A positioned ahead of the vehicle 20 .
  • the shape of vehicle 20 is exemplary only.
  • Vehicle 20 is an example of a mobile object.
  • At least part of the lighting system 101 is mounted on each of the left headlight unit 21 and the right headlight unit 22 .
  • the left headlight unit 21 is mounted on the left front corner of the vehicle 20 .
  • the right headlamp unit 22 is mounted in the right front corner of the vehicle 20 .
  • Each of the left headlamp unit 21 and the right headlamp unit 22 includes a housing and a translucent cover that define a lamp chamber. The translucent cover forms part of the outer surface of vehicle 20 .
  • the illumination system 101 includes a first optical system 11 as illustrated in FIG.
  • the first optical system 11 is arranged in the above lamp chamber.
  • the first optical system 11 has a spatial light modulator 111 .
  • the first optical system 11 appropriately includes optical components necessary to form a low beam pattern LP on the illuminated area A using light emitted from the light source 111a provided in the spatial light modulator 111. Examples of optical components include lenses, reflectors, mirrors, shades, and the like.
  • the spatial light modulator 111 includes a plurality of light sources 111a.
  • the plurality of light sources 111a are arranged in a matrix.
  • Each light source 111a is implemented by a semiconductor light emitting device. Examples of semiconductor light emitting devices include light emitting diodes (LEDs), laser diodes (LDs), and EL devices.
  • the brightness of each light source 111a is configured to be controlled independently of the other light sources 111a.
  • FIG. 4 illustrates a low beam pattern LP formed in front of the vehicle 20 by the spatial light modulator 111 illustrated in FIG.
  • Symbol H represents a horizontal reference line in the first optical system 11 .
  • a symbol V represents a vertical reference line in the first optical system 11 .
  • the horizontal reference line and the vertical reference line are orthogonal. The intersection of the horizontal reference line and the vertical reference line corresponds to the optical axis of the first optical system 11 .
  • the low-beam pattern LP is a light distribution pattern formed in a portion of the illuminated area A located relatively close to the vehicle 20 .
  • the shape of the cutoff line CL that defines the boundary between the illuminated area and the non-illuminated area at the upper end of the low beam pattern LP is determined so as not to give glare to another vehicle 30 positioned in front of the vehicle 20 .
  • the low beam pattern LP includes a plurality of first sub-areas SA1. Each first sub-area SA1 is associated with one of the plurality of light sources 111a included in the spatial light modulator 111.
  • FIG. The shape of the low beam pattern LP illustrated in FIG. 4 corresponds to a state in which all the light sources 111a are turned on.
  • the lighting system 101 includes a control device 14 .
  • Controller 14 is configured to control the operation of spatial light modulator 111 .
  • the control device 14 may be arranged in the lamp chamber, or may be supported on the outer surface of the housing that defines the lamp chamber. Alternatively, the control device 14 can be arranged at an appropriate location on the vehicle 20 independently of the headlight unit.
  • the control device 14 has a reception unit 141 .
  • the reception unit 141 is configured as a hardware interface that receives detection information DT through a communication network mounted on the vehicle 20 .
  • the detection information DT is information indicating the position of a specific illuminated object that avoids glare detected in the illuminated area A by a sensor mounted on the vehicle 20 .
  • specific objects to be illuminated include other vehicles and pedestrians.
  • sensors include LiDAR (Light Detection and Ranging) sensors, cameras, millimeter wave radars, and the like.
  • the detection information DT may be in the form of analog data or in the form of digital data. If the detection information DT is in the form of analog data, the reception unit 141 has an appropriate conversion circuit including an A/D converter.
  • the control device 14 includes a processing section 142 and an output section 143 .
  • the processing unit 142 is configured to output a first control signal CT1 for controlling the operation of the spatial light modulator 111 from the output unit 143 based on the detection information DT received by the receiving unit 141 .
  • the output unit 143 is configured as a hardware interface.
  • the first control signal CT1 may be an analog signal or a digital signal. If the first control signal CT1 is an analog signal, the output section 143 comprises a suitable conversion circuit including a D/A converter.
  • the first control signal CT1 includes information designating the brightness of each light source 111a.
  • the light source 111a performs a light-off operation.
  • the spatial light modulator 111 controls the brightness of each light source 111a based on the first control signal CT1.
  • a PWM dimming method, a DC dimming method, or the like can be appropriately adopted.
  • the shape of the low beam pattern LP is predetermined so as not to give glare to the other vehicle 30 positioned in front of the vehicle 20. road, etc.), a situation may occur in which the other vehicle 30 enters the low beam pattern LP.
  • the other vehicle 30 enters the low beam pattern LP.
  • another vehicle 30 is traveling on an uphill road that curves to the right.
  • another vehicle 30 enters the illumination area of the low beam pattern LP illustrated in FIG. 4, which may give glare to the occupants of the vehicle.
  • the processing unit 142 of the control device 14 operates the spatial light modulator 111 so as to form a first low-luminance area LA1 having a relatively low luminous intensity in the low-beam pattern LP according to the detection information DT received by the receiving unit 141. is configured to output from the output unit 143 a first control signal CT1 for controlling the .
  • the processing unit 142 is configured to determine whether the position of the other vehicle 30 indicated by the detection information DT is within the illumination area of the low beam pattern LP. Since the positional relationship between the vehicle 20 and each first sub-area SA1 in the low beam pattern LP is known, information indicating the positional relationship can be stored in advance in a storage unit (not shown).
  • the storage unit can be realized by a semiconductor memory or a hard disk device.
  • the processing unit 142 can make the determination by collating the position of the other vehicle 30 with respect to the vehicle 20 specified through the detection information DT with the positional relationship information stored in the storage unit.
  • the processing unit 142 When it is determined that the other vehicle 30 is within the illumination area, the processing unit 142 outputs the first control signal CT1 to turn off at least one light source 111a so that at least part of the other vehicle 30 is included in the non-illumination area. is output from the output unit 143 .
  • the first low-luminance area LA1 is formed by configuring the first control signal CT1 to turn off the light sources 111a corresponding to the shaded first sub-area SA1. ing.
  • the first low-luminance area LA1 is defined such that at least that portion is included in the non-illumination area.
  • the first control signal CT1 does not have to turn off the light source 111a as long as an area with relatively low luminous intensity can be formed.
  • the term "non-illuminated area" used in this specification includes an area illuminated by the light source 111a that is lit at a brightness that does not give glare to the object to be illuminated. That is, the first low-luminance area LA1 may also be formed by reducing the luminance of at least one light source 111a.
  • the relative position between the vehicle 20 and the other vehicle 30 can change from moment to moment depending on the relative speed of the two and road surface conditions.
  • Detection information DT reflecting such a situation is input to the control device 14 at a predetermined cycle and received by the receiving unit 141 .
  • the processing unit 142 is configured to change at least one of the position and size of the first low-luminance area LA1 according to the relative positions of the vehicle 20 and the other vehicle 30 specified through the detection information DT. At least one of the position and size of the first low-luminance area LA1 is changed by outputting a first control signal CT1 that changes at least one of the number of light sources 111a whose brightness is reduced or extinguished.
  • the relative positions of the vehicle 20 and the other vehicle 30 are different from the situation illustrated in FIG.
  • the processing unit 142 of the control device 14 changes the position of the first low-luminance area LA1 so that at least a portion that can give glare to the other vehicle 30 under this situation is included in the non-illuminated area.
  • the shape of the cutoff line CL is changed through the formation of the first low-luminance area LA1. Control such as changing the light distribution state of the low beam pattern LP is possible. As a result, the degree of suppression of glare that can be given to the object to be illuminated can be increased.
  • FIG. 7 shows another example of the configuration of the spatial light modulator 111.
  • the number and arrangement of the plurality of light sources 111a according to this example are determined so that the low beam pattern LP of the initial shape is formed by extinguishing or reducing the luminance of some of them as illustrated in FIG. ing.
  • the degree of freedom regarding the position and shape of the first low-luminance area LA1 it is possible to increase the degree of freedom regarding the position and shape of the first low-luminance area LA1.
  • the degree of freedom of deformation of the cutoff line CL in the region located on the right side of the vertical reference line V can be increased.
  • the illumination system 101 may comprise a second optical system 12, as illustrated in FIG.
  • the second optical system 12 has an auxiliary low beam light source 121 .
  • the auxiliary low beam light source 121 may be a lamp light source or a semiconductor light emitting device.
  • the control of turning on/off the auxiliary low-beam light source 121 may be performed by the control device 14 or may be performed by another control device (not shown).
  • the second optical system 12 appropriately includes optical components necessary for forming the auxiliary low beam pattern SLP in the illuminated area A using the light emitted from the auxiliary low beam light source 121 .
  • optical components include lenses, reflectors, mirrors, shades, and the like. It is preferable to use an optical component having a stronger light diffusing property than that of the first optical system 11 .
  • FIG. 9 illustrates an auxiliary low beam pattern SLP formed in front of the vehicle 20 by the second optical system 12.
  • the auxiliary low beam pattern SLP is formed so as to at least partially overlap a portion of the low beam pattern LP located below the cutoff line CL.
  • the lighting resources of the first optical system 11 can be preferentially allocated to the light distribution control for suppressing glare without impairing the low-beam illumination.
  • the illumination system 101 may comprise a third optical system 13, as illustrated in FIG.
  • the third optical system 13 has a high beam light source 131 .
  • the high beam light source 131 has a plurality of light sources arranged in the left-right direction of the vehicle 20 .
  • Each light source may be a lamp light source, but is preferably a semiconductor light emitting device.
  • the third optical system 13 appropriately includes optical components necessary for forming the high beam pattern HP on the illuminated area A using the light emitted from the high beam light source 131 . Examples of optical components include lenses, reflectors, mirrors, shades, and the like.
  • FIG. 10 illustrates a high beam pattern HP formed in front of the vehicle 20 by the third optical system 13.
  • the high beam pattern HP is formed so as to illuminate at least a portion of the illuminated area A above the cutoff line CL of the low beam pattern LP.
  • the high beam pattern HP includes a plurality of second sub-areas SA2. Each second sub-area SA2 is associated with one of the plurality of light sources included in high beam light source 131 .
  • the control device 14 is configured to output a second control signal CT2 for controlling the operation of the high beam light source 131 from the output section 143.
  • the second control signal CT2 may be an analog signal or a digital signal. If the second control signal CT2 is an analog signal, the output section 143 has a suitable conversion circuit including a D/A converter.
  • the second control signal CT2 includes information designating the luminance of each of the plurality of light sources included in the high beam light source 131. When zero luminance is specified, the light source performs a light-off operation.
  • the high beam light source 131 controls the brightness of each light source based on the second control signal CT2. As a method for controlling luminance, a PWM dimming method, a DC dimming method, or the like can be appropriately adopted.
  • the processing unit 142 converts the second low-luminance area LA2, which at least partially overlaps with the first low-luminance area LA1 formed in the low-beam pattern LP by the spatial light modulator 111 and has relatively low luminance, into a high-beam pattern.
  • a second control signal CT2 for controlling the high beam light source 131 so as to form the pattern HP is output from the output section 143 .
  • the processing unit 142 compares the position of the first sub-area SA1 involved in the formation of the first low-luminance area LA1 specified when the first control signal CT1 is output with the positional relationship information stored in the storage unit.
  • a second sub-area SA2 can be determined that participates in the formation of the second low intensity area LA2.
  • the second low-luminance area LA2 is formed by configuring the second control signal CT2 to turn off the light sources corresponding to the shaded second sub-area SA2.
  • the processing unit 142 of the control device 14 having various functions described so far can be realized by a general-purpose microprocessor operating in cooperation with a general-purpose memory.
  • a CPU, MPU, and GPU can be exemplified as a general-purpose microprocessor.
  • Examples of general-purpose memory include ROM and RAM.
  • the ROM can store a computer program that implements the function.
  • ROM is an example of a non-transitory computer-readable medium that stores computer programs.
  • the general-purpose microprocessor designates at least part of the computer program stored in the ROM, develops it on the RAM, and cooperates with the RAM to execute the above-described processing.
  • the above computer program may be preinstalled in a general-purpose memory, or may be downloaded from an external server device (not shown) via a wireless communication network (not shown) and then installed in the general-purpose memory.
  • the external server device is an example of a non-transitory computer-readable medium storing the computer program.
  • the processing unit 142 may be implemented by a dedicated integrated circuit such as a microcontroller, ASIC, or FPGA that can execute the above computer programs.
  • the computer program is pre-installed in a non-volatile memory included in the dedicated integrated circuit.
  • the memory is an example of a non-transitory computer-readable medium that stores a computer program.
  • Processing unit 142 may also be implemented by a combination of a general-purpose microprocessor and a dedicated integrated circuit.
  • FIG. 11 illustrates the functional configuration of the lighting system 102 according to the second embodiment.
  • the lighting system 102 is mounted on the vehicle 20 illustrated in FIG. 2 in the same manner as the lighting system 101 according to the first embodiment, and is configured to illuminate an illuminated area A located in front of the vehicle 20. .
  • the illumination system 102 includes a first optical system 15, as illustrated in FIG.
  • the first optical system 15 is arranged in the lamp chamber.
  • the first optical system 15 has at least one light source 151 .
  • the light source 151 may be a lamp light source or a semiconductor light emitting device. Examples of semiconductor light emitting devices include light emitting diodes (LEDs), laser diodes (LDs), and EL devices.
  • the first optical system 15 appropriately includes optical components necessary for forming the first light distribution pattern P1 in the illuminated area A using the light emitted from the light source 151.
  • optical components include lenses, reflectors, mirrors, shades, and the like.
  • the illumination system 102 has a second optical system 16 .
  • the second optical system 16 is arranged inside the lamp chamber.
  • the second optical system 16 has a spatial light modulator 161 .
  • the second optical system 16 appropriately includes optical components necessary to form the second light distribution pattern P2 using the light emitted from the light source 161a provided in the spatial light modulator 161.
  • FIG. Examples of optical components include lenses, reflectors, mirrors, shades, and the like.
  • the second light distribution pattern P2 is formed in the illuminated region A so as to at least partially overlap the first light distribution pattern P1.
  • the spatial light modulator 161 includes a plurality of light sources 161a.
  • the plurality of light sources 161a are arranged in a matrix.
  • Each light source 161a is realized by a semiconductor light emitting device.
  • the brightness of each light source 161a is configured to be controlled independently of the other light sources 161a.
  • FIG. 13 illustrates the second light distribution pattern P2 formed in front of the vehicle 20 by the spatial light modulator 161 illustrated in FIG.
  • Symbol H represents a horizontal reference line in the second optical system 16 .
  • a symbol V represents a vertical reference line in the second optical system 16 .
  • the horizontal reference line and the vertical reference line are orthogonal. The intersection of the horizontal reference line and vertical reference line corresponds to the optical axis of the second optical system 16 .
  • the second light distribution pattern P2 includes a plurality of sub-areas SA. Each sub-area SA is associated with one of the plurality of light sources 161a included in the spatial light modulator 161.
  • FIG. The shape of the second light distribution pattern P2 illustrated in FIG. 13 corresponds to a state in which all the light sources 161a are turned on.
  • the lighting system 102 includes a control device 17.
  • Controller 17 is configured to control the operation of each of light source 151 and spatial light modulator 161 .
  • the control device 17 may be arranged in the lamp chamber, or may be supported on the outer surface of the housing that defines the lamp chamber. Alternatively, the control device 17 can be arranged at an appropriate location on the vehicle 20 independently of the headlight unit.
  • the control device 17 includes a reception unit 171 .
  • the reception unit 171 is configured as a hardware interface that receives the instruction information IS through a communication network mounted on the vehicle 20 .
  • the instruction information IS includes information indicating whether or not to form the first light distribution pattern P1.
  • the instruction information IS may be generated based on an instruction input by an occupant of the vehicle 20, or may be generated based on a detection result of the surrounding environment by a sensor mounted on the vehicle 20.
  • FIG. Examples of sensors include LiDAR (Light Detection and Ranging) sensors, cameras, millimeter wave radars, and the like.
  • the instruction information IS may be in the form of analog data or digital data. If the instruction information IS is in the form of analog data, the reception unit 171 has an appropriate conversion circuit including an A/D converter.
  • the control device 17 includes a processing section 172 and an output section 173 .
  • the processing unit 172 is configured to output, from the output unit 173, a first control signal CT1 for switching on/off of the light source 151 based on the instruction information IS received by the receiving unit 171.
  • the output unit 173 is configured as a hardware interface.
  • the first control signal CT1 may be an analog signal or a digital signal. If the first control signal CT1 is an analog signal, the output section 173 comprises a suitable conversion circuit including a D/A converter.
  • FIG. 14 illustrates a state in which the first light distribution pattern P1 is formed by turning on the light source 151.
  • the first light distribution pattern P1 and the second light distribution pattern P2 have a partially overlapping region. Since the light emitted from the first optical system 15 and the light emitted from the second optical system 16 overlap in this area, the luminous intensity increases.
  • the processing unit 172 of the control device 17 is configured to output from the output unit 173 the second control signal CT2 for controlling the operation of the spatial light modulator 161 .
  • the second control signal CT2 may be an analog signal or a digital signal. If the second control signal CT2 is an analog signal, the output section 173 has an appropriate conversion circuit including a D/A converter.
  • the second control signal CT2 includes information designating the brightness of each light source 161a.
  • the light source 161a performs a light-off operation.
  • the spatial light modulator 161 controls the brightness of each light source 161a based on the second control signal CT2.
  • a PWM dimming method, a DC dimming method, or the like can be appropriately adopted.
  • the processing unit 172 generates a second control signal for controlling the spatial light modulator 161 so as to form a low luminous intensity area LA having relatively low luminous intensity in the area where the first light distribution pattern P1 and the second light distribution pattern P2 overlap. It is configured to output CT2 from the output unit 173 . Specifically, the processing unit 172 outputs a second control signal CT2 that turns off at least one of the plurality of light sources 161a of the spatial light modulator 161 associated with the position where the low luminous intensity area LA is to be formed. Output from 173.
  • the low luminous intensity area LA is formed by configuring the second control signal CT2 to turn off the light sources 161a corresponding to the shaded sub-area SA.
  • the second control signal CT2 does not have to turn off the light source 161a as long as an area with relatively low luminous intensity can be formed. That is, the low luminance area LA may be formed by reducing the luminance of at least one light source 161a.
  • the second control signal CT2 may be configured such that the low-luminance area LA is automatically formed when the first light distribution pattern P1 is turned on, or an instruction to form the low-luminance area LA included in the instruction information IS. may be configured to be based on
  • the above configuration it is possible to locally form a region with relatively low luminous intensity in the region where luminous intensity is increased by overlapping the first light distribution pattern P1 and the second light distribution pattern P2. That is, it is possible to form a light distribution area with enhanced visibility to a long distance and set a low luminous intensity area LA in which the degree of glare suppression is locally enhanced within the light distribution area. Since the position and size of the low luminous intensity area LA can be easily changed by using the spatial light modulator 161, the degree of freedom of light distribution design in the illumination system 102 can be increased.
  • the region where the first light distribution pattern P1 and the second light distribution pattern P2 overlap includes the optical axis of the second optical system 16 (the intersection of the horizontal reference line H and the vertical reference line V). I'm in.
  • the low luminous intensity area LA is formed so as to include the optical axis of the second optical system 16 .
  • the luminous intensity of the light distribution pattern tends to be high near the optical axis of the optical system. Therefore, the sum of the luminous intensity also tends to increase due to the overlapping of the first light distribution pattern P1 and the second light distribution pattern P2.
  • the low luminous intensity area LA By forming the low luminous intensity area LA in such an area, the local glare suppressing effect can be enhanced.
  • the low luminous intensity area LA may be formed so as to include the optical axis (not shown) of the first light distribution pattern P1, or the optical axis of the first light distribution pattern P1 and the light of the second light distribution pattern P2. It may be formed to include both axes.
  • the controller 14 converts the low beam pattern LP illustrated in FIG. It can be configured so that it can be formed as P2.
  • the low beam pattern LP is a light distribution pattern that is intended to be formed in a portion of the illuminated area A that is relatively close to the vehicle 20 .
  • the shape of the cutoff line CL that defines the boundary between the illuminated area and the non-illuminated area at the upper end of the low beam pattern LP is determined so as not to give glare to another vehicle 30 positioned in front of the vehicle 20 .
  • the low beam pattern LP is formed by configuring the second control signal CT2 to turn off the light sources 161a corresponding to the hatched sub-areas SA.
  • the light source 161a associated with the sub-area SA positioned closer to the information than the cutoff line CL does not necessarily need to be turned off.
  • a region illuminated by the light source 161a illuminated at a brightness that does not give glare to other vehicles 30 and pedestrians positioned in front of the vehicle 20 is also included in the meaning of the above-mentioned "non-illuminated region”.
  • the control device 17 appropriately changes the configuration of the second control signal CT2 to form the first state in which the low beam pattern LP having the cutoff line CL at the upper end is formed as the second light distribution pattern P2, and the cutoff line CL It is configured to be switchable between a second state in which the second light distribution pattern P2 is formed so that light is distributed also to a portion located above.
  • the second state can be regarded as a state in which so-called high beam light distribution is performed.
  • the switching between the first state and the second state may be performed in conjunction with turning on/off the light source 151 forming the first light distribution pattern P1, or may be performed based on an instruction included in the instruction information IS.
  • the second optical system 16 can be divided into a low beam distribution optical system and a high beam distribution optical system, taking advantage of the spatial light modulator 161 having a high degree of freedom in changing the shape of the light distribution pattern. Available for both. Therefore, it is possible to prevent the lighting system 102 from becoming large and complicated.
  • the first light distribution pattern P1 is formed so as to overlap a region located above the portion that can be the cutoff line CL in the second light distribution pattern P2. be. Therefore, when the second light distribution pattern P2 is used for high-beam light distribution, visibility at a distance can be further improved.
  • the processing unit 172 of the control device 17 having various functions described so far can be realized by a general-purpose microprocessor operating in cooperation with a general-purpose memory.
  • a CPU, MPU, and GPU can be exemplified as a general-purpose microprocessor.
  • Examples of general-purpose memory include ROM and RAM.
  • the ROM can store a computer program that implements the function.
  • ROM is an example of a non-transitory computer-readable medium that stores computer programs.
  • the general-purpose microprocessor designates at least part of the computer program stored in the ROM, develops it on the RAM, and cooperates with the RAM to execute the above-described processing.
  • the above computer program may be preinstalled in a general-purpose memory, or may be downloaded from an external server device (not shown) via a wireless communication network (not shown) and then installed in the general-purpose memory.
  • the external server device is an example of a non-transitory computer-readable medium storing the computer program.
  • the processing unit 172 may be implemented by a dedicated integrated circuit such as a microcontroller, ASIC, or FPGA that can execute the above computer programs.
  • the computer program is pre-installed in a non-volatile memory included in the dedicated integrated circuit.
  • the memory is an example of a non-transitory computer-readable medium that stores a computer program.
  • Processing unit 172 may also be implemented by a combination of a general-purpose microprocessor and a dedicated integrated circuit.
  • the spatial light modulator 111 has a plurality of light sources 111a arranged in a matrix.
  • the control device 14 forms the first low-luminance area LA1 by reducing the brightness of at least one of the plurality of light sources 111a.
  • the first low-luminance area LA1 is formed by forming a low-beam pattern LP while changing the traveling direction of light emitted from at least one light source with a scanning optical system, and reducing the luminance of the light source at a desired position.
  • a digital micromirror device may be used instead of the scanning optical system.
  • at least one pixel of the liquid crystal device may be associated with a plurality of first sub-areas SA1 included in the low beam pattern LP, and the luminance of the pixel may be reduced to form the first low-luminance area LA1.
  • the system of the liquid crystal device may be a transmissive type or a reflective type.
  • each of the second optical system 12 and the third optical system 13 may be arranged in the same lamp chamber as the first optical system 11, or may be arranged in a separate lamp chamber. may be
  • the spatial light modulator 161 has a plurality of light sources 161a arranged in a matrix.
  • the control device 17 forms the low luminous intensity area LA by reducing the luminance of at least one of the plurality of light sources 161a. With such a configuration, it is possible to obtain a high degree of control freedom regarding the position and shape of the low-luminance area LA with a relatively simple optical system. .
  • the low-luminance area LA can be formed by forming a low-beam pattern LP while changing the traveling direction of light emitted from at least one light source with a scanning optical system, and reducing the luminance of the light source at a desired position.
  • a digital micromirror device may be used instead of the scanning optical system.
  • at least one pixel of the liquid crystal device may be associated with a plurality of sub-areas SA included in the low-beam pattern LP, and the low-luminance area LA may be formed by reducing the brightness of the pixel.
  • the system of the liquid crystal device may be a transmissive type or a reflective type.
  • the lighting system 101 according to the first embodiment and the lighting system 102 according to the second embodiment are mounted on a vehicle 20 having four wheels.
  • lighting system 101 and lighting system 102 may also be mounted on a two-wheeled motor vehicle or a three-wheeled motor vehicle.
  • the type of the motorcycle or three-wheeled vehicle may be a straddle type, a scooter type, or a standing type.
  • Motorcycles and three-wheeled vehicles are also examples of moving objects.
  • Lighting system 101 and lighting system 102 may be mounted on a tram vehicle with four or more wheels, or the like.
  • a street rail vehicle is also an example of a mobile object.
  • the number of lighting systems 101 and lighting systems 102 mounted on the front portion of the moving body can be appropriately determined according to the specifications of the moving body.
  • Japanese Patent Application No. 2021-171560 filed on October 20, 2021 and Japanese Patent Application No. 2021-171561 filed on October 20, 2021 Content is incorporated.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

Un premier système optique (11) comprend un modulateur de lumière spatial (111) équipé d'au moins une source de lumière (111a), et forme un motif à faible faisceau (LP), qui présente une ligne de coupure (CL) au niveau d'une extrémité supérieure de celle-ci, dans une zone cible d'éclairage (A) au moyen de la lumière émise à partir du modulateur de lumière spatial (111). Un dispositif de commande (14) commande le fonctionnement du modulateur de lumière spatial (111) de manière à provoquer la formation d'une première zone de faible luminosité présentant une luminosité relativement faible à l'intérieur du motif à faible faisceau (LP) sur la base d'informations de détection (DT) indiquant la position d'un corps cible d'éclairage spécifique détecté à l'intérieur de la zone cible d'éclairage (A) et également à amener la position et/ou la taille de la première zone de faible luminosité à changer en fonction de sa position relative par rapport audit corps cible d'éclairage.
PCT/JP2022/035226 2021-10-20 2022-09-21 Système d'éclairage, dispositif de commande, support lisible par ordinateur non transitoire et programme informatique WO2023067977A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008300105A (ja) * 2007-05-30 2008-12-11 Koito Mfg Co Ltd 車両用前照灯
US20160368414A1 (en) * 2014-12-19 2016-12-22 Sl Corporation Adaptive driving beam headlamp for vehicle
EP3401163A1 (fr) * 2017-04-12 2018-11-14 LG Electronics Inc. Phare de véhicule

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008300105A (ja) * 2007-05-30 2008-12-11 Koito Mfg Co Ltd 車両用前照灯
US20160368414A1 (en) * 2014-12-19 2016-12-22 Sl Corporation Adaptive driving beam headlamp for vehicle
EP3401163A1 (fr) * 2017-04-12 2018-11-14 LG Electronics Inc. Phare de véhicule

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