Control device for vehicle headlights, method for controlling vehicle headlights, vehicle headlight system

Abstract

To improve forward visibility during ADB control.SOLUTION: A control device for controlling operation of a vehicle headlight sets a dimming range NB within an illumination range of a high beam HB according to a position of an object in front of a vehicle; sets luminosity of a partial range SG set between a virtual reference line parallel to a vehicle width direction of the vehicle and a prescribed position below the virtual reference line in at least an opposite lane side area in front of the vehicle, to a first luminosity when tuning-on of the high beam HB and a low beam LB is instructed; sets the luminosity to a second luminosity lower than the first luminosity when tuning-on of the high beam HB is not instructed but tuning-on of the low beam LB is instructed; and generates a control signal for operating the vehicle headlight on the basis of the setting result of the dimming range NB and the setting result of the luminosity in the partial range SG to output the control signal to the vehicle headlight.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a control device for a vehicle headlamp, a control method for a vehicle headlamp, and a vehicle headlamp system.

Background Art

[0002] As a control technology for vehicle headlamps, variable light distribution control is known in which high beams are selectively dimmed (or turned off) in the range where these objects exist in order to prevent glare to preceding vehicles, oncoming vehicles, or pedestrians. Such variable light distribution control is also referred to as ADB (Adaptive Driving Beam) control. Japanese Patent Application Laid-Open No. 2022-70295 (Patent Document 1) discloses a headlamp including a lamp unit capable of changing the light distribution pattern and the irradiation optical axis of the irradiated light, and control means for controlling the lamp unit based on the position information of an object detected by a camera. The control means includes an object detection unit that detects a dark zone generated when irradiating light on an object with the lamp unit, and a lamp control unit that selectively or integrally controls the light distribution pattern and the irradiation optical axis of the lamp unit based on the detected dark zone. A control device for a vehicle lamp is described. [[ID=!]]

[0003] By the way, when using the above-described ADB control, particularly when dimming is performed according to an object on the oncoming lane side, the forward visibility may decrease due to the decrease in the irradiation light near the dimming range. This is presumably because in a general low beam, the upper end of the low beam is set relatively lower on the oncoming lane side than on the own lane side, resulting in a lower irradiation intensity by the low beam near the dimming range.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] One of the specific aspects of this disclosure is aimed at improving forward visibility during ADB control. [Means for solving the problem]

[0006] [1] A control device for a vehicle headlight according to one aspect of the present disclosure is (a) a control device for controlling the operation of a vehicle headlight mounted on a vehicle and capable of emitting a low beam and a high beam with a variable light distribution pattern, (b) based on the detection result of an object in front of the vehicle, if an object exists, setting a dimming range within the illumination range of the high beam according to the position of the object, (c) in front of the vehicle, at least in the oncoming lane area relative to the vehicle, setting the luminous intensity of a portion of the range set between a virtual reference line parallel to the vehicle width direction assumed to be in front of the vehicle and a predetermined position below it, to a first luminous intensity when the high beam and the low beam are instructed to be turned on, and to a second luminous intensity lower than the first luminous intensity when the high beam is not instructed to be turned on but the low beam is instructed to be turned on, and (d) based on the setting result of the dimming range and the setting result of the luminous intensity of the portion of the range Vehicle headlights This is a control device for a vehicle's headlight, which generates a control signal to operate the headlight and outputs it to the vehicle's headlight. [2] A control method for a vehicle headlight according to one aspect of the present disclosure is a control method for controlling the operation of a vehicle headlight mounted on a vehicle and capable of emitting a low beam and a high beam with a variable light distribution pattern, (b) a controller sets a dimming range within the illumination range of the high beam according to the position of the object if the object is present, based on the detection result of an object in front of the vehicle, (c) the controller sets the luminous intensity of a portion of the range set in front of the vehicle, at least in the oncoming lane area relative to the vehicle, between a virtual reference line parallel to the vehicle width direction assumed to be in front of the vehicle and a predetermined position below it, to a first luminous intensity when the high beam and the low beam are instructed to be turned on, and to a second luminous intensity lower than the first luminous intensity when the high beam is not instructed to be turned on but the low beam is instructed to be turned on, and (d) the controller sets the luminous intensity of a portion of the range based on the setting result of the dimming range and the setting result of the luminous intensity of the portion of the range Vehicle headlights This is a method for controlling a vehicle's headlight, which generates a control signal to operate the headlight and outputs it to the vehicle's headlight. [3] One embodiment of a vehicle headlight system is a vehicle headlight system that includes the control device described in [1], a headlight controlled by the control device, and a sensor for detecting the object.

[0007] The above configuration makes it possible to improve forward visibility during ADB control. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1(A) is a block diagram showing the configuration of a vehicle headlight system according to one embodiment. Figure 1(B) is a schematic front view of the headlight. [Figure 2] Figure 2 shows an example of a computer system configuration. [Figure 3]Figure 3(A) is a diagram illustrating low beam, high beam, and a portion of the low beam. Figure 3(B) is a diagram showing the low beam and a portion of the low beam extracted from Figure 3(A), and Figure 3(C) is a diagram showing the high beam extracted from Figure 3(A). [Figure 4] Figure 4(A) is a diagram illustrating a control method for a portion of the area illuminated in conjunction with the low beam. Figure 4(B) is a magnified view of a portion of Figure 4(A). [Figure 5] Figure 5 is a flowchart showing the operation procedure of a controller in a vehicle headlight system. [Modes for carrying out the invention]

[0009] Figure 1(A) is a block diagram showing the configuration of a vehicle headlight system according to one embodiment. The vehicle headlight system of this embodiment consists of a controller 1, an object detection sensor 2, and a pair of headlights 3L and 3R. In this embodiment, the controller 1 corresponds to the "control device," and the method of controlling each of the headlights 3L and 3R by this controller 1 corresponds to the "control method."

[0010] Controller 1 is connected to the object detection sensor 2 and each headlight 3L and 3R, and controls the light illumination by each headlight 3L and 3R according to the object detection result by the vehicle detection sensor 2. This controller 1 can be configured using a computer system (see Figure 2 described later) that includes, for example, a processor (CPU: Central Processing Unit), a storage device such as ROM (Read Only Memory), RAM (Random Access Memory), and flash memory, as well as an input / output interface. In this embodiment, Controller 1 becomes capable of performing predetermined functions when a program previously stored in the storage device (or ROM) is read and executed by the processor.

[0011] The object detection sensor 2 detects objects such as preceding or oncoming vehicles, pedestrians, and bicycles, and supplies information such as their position, size, and type to the controller 1. As the object detection sensor 2, for example, a sensor that detects objects by taking pictures of the area in front of the vehicle with a camera and performing image analysis on the image data can be used. Alternatively, LiDAR (Light Detection And Ranging) which detects objects by irradiating them with light such as near-infrared light and detecting the reflected light with a light sensor may be used, or millimeter-wave radar which detects objects by irradiating them with radio waves with frequencies of tens to hundreds of GHz and detecting the reflected waves may be used.

[0012] The headlights 3L and 3R are installed at predetermined positions on the left and right sides of the front of the vehicle and operate based on control signals provided by the controller 1 to illuminate the area in front of the vehicle. Each headlight 3L and 3R comprises a first unit 31 and a second unit 32, respectively. As illustrated in the schematic front view of headlight 3L in Figure 1(B), the first unit 31 and the second unit 32 are provided separately and installed within a housing. Headlight 3R is symmetrical to headlight 3L and is therefore not shown. Note that the first unit 31 and the second unit 32 may be configured as a single unit.

[0013] The first unit 31 forms a low beam, which is light mainly for illuminating the forward area relatively close to the vehicle, and a high beam, which is light mainly for illuminating the forward area relatively far from the vehicle. In this embodiment, the variable light distribution control (ADB control) described above is performed for the illumination of the high beam. Specifically, for example, within the entire illumination range of the high beam, the area where a preceding vehicle or oncoming vehicle is present is set to be dimmed, and the area outside of that range is illuminated with light, and the high beam illumination is performed accordingly. In this embodiment, the concept of "dimming" includes not only setting the luminous intensity relatively lower than that of a normal high beam, but also setting the luminous intensity to 0.

[0014] As the first unit 31 capable of emitting a high beam with the variable light distribution pattern described above, for example, a unit can be used that has a plurality of light-emitting diodes (LEDs) arranged in two directions and that can individually control the on / off state of each LED. Alternatively, the first unit 31 may be a unit that combines a light source bulb with a reflector or shielding plate, or a unit that combines a liquid crystal element capable of individually controlling the light transmission state of each pixel with a light source, or a unit that can control the on / off timing of a semiconductor laser such as a laser diode and the scanning timing of a scanning element. Furthermore, a unit can be used that combines a plurality of luminaires, each capable of emitting a different fixed light distribution.

[0015] The second unit 32 emits light to illuminate a portion of the area, which is set to overlap with at least a portion of the illumination range of the low beam irradiated by the first unit 31. The specific location of the portion of the area will be described later. As the second unit 32, for example, a unit having several light-emitting diodes whose on / off states can be individually controlled can be used.

[0016] The functions realized by the execution of the program by the controller 1 described above will be explained using functional blocks. The controller 1 is composed of a light distribution pattern setting unit 11, a light amplification setting unit 12, and a control signal generation unit 13.

[0017] The light distribution pattern setting unit 11 variably sets the light distribution pattern within the entire illumination range of the high beam based on the object detection result by the object detection sensor 2, and outputs the setting to the control signal generation unit 13. The illumination pattern includes a light illumination range and a dimming range. As described above, for example, a predetermined range including the position of a preceding vehicle or an oncoming vehicle is set as the dimming range, and the remaining range is set as the light illumination range.

[0018] The light enhancement setting unit 12 sets the necessity of light enhancement for a partial range (the area irradiated with light by the second unit 32) that is arranged to overlap at least a part of the irradiation range of the low beam described above. Specifically, the light enhancement setting unit 12 sets that the partial range is to be light-enhanced when the low beam is irradiated and the high beam (including during ADB control) is also irradiated. Further, when the low beam is irradiated and the high beam (including during ADB control) is not irradiated, the light enhancement setting unit 12 sets that the partial range is to be dimmed or turned off.

[0019] The control signal generation unit 13 generates a control signal for realizing the irradiation pattern set by the light distribution pattern setting unit 11 and outputs the control signal to the first unit 31. Further, the control signal generation unit 13 generates a control signal according to the necessity of light enhancement set by the light enhancement setting unit 12 and outputs the control signal to the second unit 32.

[0020] FIG. 2 is a diagram showing a configuration example of a computer system. The above-described controller 10 can be configured using a computer system as shown in the figure, for example. The CPU (Central Processing Unit) 201 performs information processing by reading out and executing a program 207 stored in the storage device 204. The ROM (Read Only Memory) 202 stores a basic control program and the like necessary for the operation of the CPU 201. The RAM (Temporary Storage Memory) 203 temporarily stores data necessary for the information processing of the CPU 201. The storage device 204 is a large-capacity storage device for storing data and is composed of a hard disk drive, a solid state drive, or the like. The communication device 205 performs processing related to data communication with other external devices. The input / output unit 206 is an interface for connecting to an external device. The CPU 201 and the like are communicably connected to each other via a bus.

[0021] FIG. 3(A) is a diagram for explaining a low beam, a high beam, and a partial range of the low beam. In FIG. 3(A), the high beam is shown by a dotted line so that the positional relationship between the low beam and the high beam can be clearly understood. FIG. 3(B) is a diagram showing the low beam and a partial range of the low beam extracted from FIG. 3(A), and FIG. 3(C) is a diagram showing the high beam extracted from FIG. 3(A). In each figure, the main irradiation range of the low beam or the like on a virtual screen assumed in the vertical direction at a predetermined position (for example, a position of 25 m) in front of the vehicle is shown. In the figure, the H line shown by a straight line extending in the horizontal direction indicates a reference line in the horizontal direction (that is, a virtual reference line in the vehicle width direction), and the V line shown by a straight line extending in the vertical direction indicates a reference line in the vertical direction (that is, a virtual reference line in the vehicle height direction). In the present embodiment, the irradiation range of the low beam or the like when the traffic regulations are defined as so-called "right-hand traffic" is assumed. However, when the traffic regulations are defined as so-called "left-hand traffic", the irradiation range is reversed left and right.

[0022] The low beam LB has a part of the upper end on the right side in the figure substantially contacting the H line from the V line, and the upper end on the left side in the figure from the V line is located substantially linearly below the H line, and the space between the upper right side and the upper left side intersects obliquely with the V line, and is formed wide below the H line as a whole. In the present embodiment, the left side region of the V line in the figure corresponds to the oncoming lane side region, and the right side region of the V line corresponds to the own lane side region. As shown in the figure, the upper end of the low beam LB is set relatively lower on the oncoming lane side than on the own lane side. Specifically, the low beam LB is set such that the upper end position on the oncoming lane side is below the H line, and the upper end position on the own lane side substantially coincides with the H line. That is, the upper end position on the oncoming lane side is set lower than the upper end position on the own lane side. Here, the "upper end position" refers to the upper end of the range in which the luminous intensity in the irradiation range of the low beam is equal to or higher than a predetermined reference (for example, 2500 [cd]).

[0023] The partial range SG, which partially overlaps the low beam LB, is provided as a portion of a predetermined width from a position close to the V line to a position far from the V line in at least the left region of the figure (the region on the opposing lane side) of the adjacent regions on either side of the V line. Furthermore, the partial range SG is provided as a portion of a predetermined height d below the H line. The height d is preferably within a range of 3° below the H line, for example, with respect to the vehicle, and more preferably within a range of 1° to 2°. The end of the range of the partial range SG referred to here is the end of the range where the luminous intensity is above a predetermined standard (for example, 2500 [cd]).

[0024] The high beam HB is generally formed as a wide beam extending above the H line and across the left and right sides of the V line. More specifically, the high beam HB is formed so that its lower end extends slightly below the H line, and this lower end partially overlaps with the upper end of the low beam LB. Furthermore, the high beam HB can have its dimming range variably set at least in the width direction (parallel to the H line) within the entire irradiable range shown by the dotted line in Figure 3(A). In addition to the width direction, it may also be configured so that the dimming range can be variably set in the vertical direction (parallel to the V line). The end of the range of the high beam HB referred to here is the end of the range where the luminous intensity is above a predetermined standard (e.g., 2500 [cd]).

[0025] Figure 4(A) is a diagram illustrating a control method for a portion of the area illuminated in conjunction with the low beam. Figure 4(B) is a partially enlarged view of Figure 4(A). In this embodiment, the high beam HB is illuminated by a light distribution pattern in which the dimming range is set by the light distribution pattern setting unit 11 according to the position of the preceding vehicle or oncoming vehicle. As a result, a dimming range NB corresponding to the position of the oncoming vehicle is provided within the illumination range of the high beam HB, as shown in the figure. As described above, this dimming range NB is a range that is dimmed compared to the illumination range of the high beam HB.

[0026] When such ADB control is being performed, or when the high beam is illuminating even if ADB control is not being performed, the brightness-enhancing setting unit 12 sets the light illuminating a portion of the SG by the second unit 32 to be increased. Also, when the low beam is illuminating and the high beam (including during ADB control) is not illuminating, the brightness-enhancing setting unit 12 sets the light illuminating a portion of the SG by the second unit 32 to be reduced or turned off.

[0027] In this case, the luminous intensity of the high beam HB decreases at the boundary portion EG adjacent to the dimming range NB. This is because, in practice, it is difficult to abruptly reduce the luminous intensity of the high beam HB at the boundary with the dimming range NB, and light generated by the high beam HB is still irradiated into the dimming range NB. In other words, in order to obtain a dimming range HB with a clear boundary where the influence of such light is suppressed, it is necessary to set the luminous intensity value of the boundary portion EG low. Another reason is that, especially on the oncoming lane side, the upper end position of the low beam LB is also relatively low, so not much supplementary light is obtained from the low beam.

[0028] Therefore, as shown in Figure 4(B), for example, a decrease in the luminous intensity of the high beam HB in the vicinity above the H line and overlapping with the boundary portion EG (for example, the position indicated by the symbol P in the figure) can lead to a decrease in forward visibility. On the other hand, if one tries to solve this by increasing the luminous intensity of the high beam HB at the boundary portion EG, the luminous intensity in the dimming range NB will also increase, making it difficult to obtain a clear dimming range NB. In other words, obtaining a clear dimming range NB and improving visibility at the boundary portion EG are in a trade-off relationship.

[0029] In contrast, in this embodiment, by irradiating a portion of the area SG with light from the second unit 32, which is set to overlap with the gap between the upper end of the low beam LB and the H line in at least the left region of the V line (opposite lane side region), and also overlap with the low beam LB below it, it becomes possible to provide supplementary light to a position such as the position P shown in Figure 4(B) as an example. This makes it possible to suppress the decrease in forward visibility that may occur above the H line on the opposite lane side due to the presence of a dimming area NB. In other words, it becomes possible to improve forward visibility.

[0030] Figure 5 is a flowchart showing the operation procedure of a controller in a vehicle headlight system. It should be noted that, as long as it does not result in inconsistencies or contradictions in the information processing results, it is possible to change the processing order or add other processes, and such configurations are not excluded.

[0031] If the lamp switch (not shown) on the vehicle is operated to instruct the headlights to turn on (step S11; YES), the high beams to turn on (step S12; YES), and the mode for performing ADB control is turned on (step S13; YES), the light distribution pattern setting unit 11 of the controller 1 sets a light distribution pattern according to the position of the vehicle ahead (preceding vehicle, oncoming vehicle) detected by the object detection sensor 2 (step S14).

[0032] If the mode for performing ADB control is off (step S13; NO), the light distribution pattern setting unit 11 is not set. In this case, light is emitted across the entire illumination range of the high beam HB. If the control that automatically switches the high beam on and off is being performed, step S13 will be judged as positive when the automatic high beam is on.

[0033] When the high beams are instructed to be turned on and / or when ADB control is being performed, the brightness setting unit 12 sets a partial range of SG to a first brightness level corresponding to the brightness increase (step S15). On the other hand, when the high beams are not instructed to be turned on (step S12; NO), the brightness setting unit 12 sets a partial range of SG to a second brightness level corresponding to dimming or turning off the lights (step S16).

[0034] The control signal generation unit 13 generates control signals according to the setting results of the light distribution pattern setting unit 11 and the brightness enhancement setting unit 12, and outputs them to each headlight 3L and 3R (step S17). Upon receiving the control signals, each headlight 3L and 3R operates to form a low beam LB and a high beam HB, which are then projected in front of the vehicle. In addition, the brightness of a certain range SG increases or decreases. The process then returns to step S11.

[0035] If the lamp switch is not operated and the headlights are not instructed to be turned on (step S11; NO), the judgment in step S11 is repeated. The same applies if the lamp switch is operated and the headlights are instructed to be turned on, but then instructed to be turned off.

[0036] According to the embodiments described above, it is possible to improve forward visibility (especially visibility in the oncoming lane) during ADB control.

[0037] It should be noted that this disclosure is not limited to the embodiments described above, and can be implemented in various ways within the scope of the gist of this disclosure. For example, in the embodiments described above, the position and width (length in the direction of the H line) of the partial range SG were fixed, but they may be set to be variable according to the position and width of the dimming range NB. Also, in the embodiments described above, the partial range SG was provided only in one region on either side of the V line with respect to the vehicle itself (the region corresponding to the oncoming lane), but a partial range may be provided in the other region on either side of the V line (the region corresponding to the vehicle's own lane) in the same manner.

[0038] This disclosure has the following features: (Note 1) A control device for controlling the operation of a vehicle headlight mounted on a vehicle that is capable of emitting low beams and high beams with a variable light distribution pattern, Based on the detection result of an object in front of the vehicle, if the object is present, a dimming range corresponding to the position of the object is set within the illumination range of the high beam. In front of the vehicle, at least in the area on the opposite lane side relative to the vehicle, the luminous intensity of a portion of the range set between a virtual reference line parallel to the vehicle's width direction and a predetermined position below it is set to a first luminous intensity when the high beam and low beam are instructed to be turned on, and to a second luminous intensity lower than the first luminous intensity when the high beam is not instructed to be turned on but the low beam is instructed to be turned on. Based on the setting result of the dimming range and the setting result of the luminous intensity in a certain range, a control signal for operating the vehicle lighting device is generated and output to the vehicle headlight. A control device for vehicle headlights. (Note 2) The low beam is set such that the upper end position in the oncoming lane area is lower than the upper end position in the in-lane area. Control device for vehicle headlights as described in Appendix 1 (Note 3) The aforementioned partial range is set within 3° below the virtual reference line, based on the position of the vehicle. A control device for vehicle headlights as described in Appendix 1 or 2. (Note 4) The aforementioned partial range is set within 2° below the virtual reference line, based on the position of the vehicle. A control device for vehicle headlights as described in Appendix 3. (Note 5) The position and width of the aforementioned partial range are fixedly set, or are variably set according to the position and width of the dimming range. A control device for vehicle headlights as described in any one of the appendices 1 to 4. (Note 6) The aforementioned partial range overlaps with at least a portion of the irradiation range of the low beam. A control device for vehicle headlights as described in any one of the appendices 1 to 5. (Note 7) A control method for controlling the operation of a vehicle headlight mounted on a vehicle and capable of emitting low beams and high beams with a variable light distribution pattern, Based on the detection result of an object in front of the vehicle, the controller sets a dimming range within the high beam illumination range corresponding to the position of the object if the object is present. The controller sets the luminous intensity of a portion of the range set in front of the vehicle, at least in the area on the opposite lane side relative to the vehicle, from a virtual reference line parallel to the vehicle's width direction assumed to be in front of the vehicle to a predetermined position below it, to a first luminous intensity when the high beam and low beam are instructed to be turned on, and to a second luminous intensity lower than the first luminous intensity when the high beam is not instructed to be turned on but the low beam is instructed to be turned on. The controller generates a control signal to operate the vehicle lighting device based on the setting result of the dimming range and the setting result of the luminous intensity in a partial range, and outputs it to the vehicle headlight. A method for controlling vehicle headlights. (Note 8) A control device as described in any of the appendices 1 to 6, The headlights controlled by the control device, A sensor that detects the aforementioned object, A vehicle headlight system, including a headlight system. [Explanation of Symbols]

[0039] 1: Controller, 2: Object detection sensor, 3L, 3R: Headlights, 11: Light distribution pattern setting unit, 12: Brightness setting unit, 13: Control signal generation unit, 31: First unit, 32: Second unit

Claims

1. A control device for controlling the operation of a vehicle headlight mounted on a vehicle that is capable of emitting low beams and high beams with a variable light distribution pattern, Based on the detection result of an object in front of the vehicle, if the object is present, a dimming range corresponding to the position of the object is set within the illumination range of the high beam. In front of the vehicle, at least in the area on the opposite lane side relative to the vehicle, the luminous intensity of a portion of the area set between a virtual reference line parallel to the vehicle's width direction and a predetermined position below it is set to a first luminous intensity when the high beam and low beam are instructed to be turned on, and to a second luminous intensity lower than the first luminous intensity when the high beam is not instructed to be turned on but the low beam is instructed to be turned on. Based on the setting result of the dimming range and the setting result of the luminous intensity in a certain range, a control signal for operating the vehicle headlight is generated and output to the vehicle headlight. A control device for vehicle headlights.

2. The low beam is set such that the upper end position in the oncoming lane area is lower than the upper end position in the in-lane area. Control device for vehicle headlights according to claim 1

3. The aforementioned partial range is set within 3° below the virtual reference line, based on the position of the vehicle. A control device for a vehicle headlight according to claim 1.

4. The aforementioned partial range is set within 2° below the virtual reference line, based on the position of the vehicle. The control device for a vehicle headlight according to claim 3.

5. The position and width of the aforementioned partial range are fixedly set, or are variably set according to the position and width of the dimming range. A control device for a vehicle headlight according to claim 1.

6. The aforementioned partial range overlaps with at least a portion of the irradiation range of the low beam. A control device for a vehicle headlight according to claim 1.

7. A control method for controlling the operation of a vehicle headlight mounted on a vehicle and capable of emitting low beams and high beams with a variable light distribution pattern, Based on the detection result of an object in front of the vehicle, the controller sets a dimming range within the high beam illumination range corresponding to the position of the object if the object is present. The controller sets the luminous intensity of a portion of the area set in front of the vehicle, at least in the area on the opposite lane side relative to the vehicle, between a virtual reference line parallel to the vehicle's width direction assumed to be in front of the vehicle and a predetermined position below it, to a first luminous intensity when the high beam and low beam are instructed to be turned on, and to a second luminous intensity lower than the first luminous intensity when the high beam is not instructed to be turned on but the low beam is instructed to be turned on. The controller generates a control signal to operate the vehicle headlight based on the setting result of the dimming range and the setting result of the luminous intensity in a partial range, and outputs it to the vehicle headlight. A method for controlling vehicle headlights.

8. The control device according to claim 1, The headlights controlled by the control device, A sensor that detects the aforementioned object, A vehicle headlight system, including a headlight system.

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