Lamp system and lamp controller and control method

Abstract

In a light fixture system (100), a high-precision light unit (110) includes a plurality of pixels (PIX) that can be individually controlled in accordance with an input image (IMG1), and irradiates a road surface with a light beam (BM) having a light distribution pattern corresponding to the state of the plurality of pixels (PIX). The sensor (120) is provided so as to be capable of detecting vibration of the vehicle body. The controller (200) corrects an original image (IMG0) by reducing the size of a pattern included in the original image (IMG0) defining a pattern to be drawn on a road surface in accordance with the direction of vibration.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a vehicle lamp. BACKGROUND

[0002] A vehicle lamp is generally capable of switching between low beam and high beam. The low beam illuminates the vicinity of the own vehicle with a predetermined illuminance, and is provided with a light distribution regulation so as not to cause glare to an oncoming vehicle or a preceding vehicle, and is mainly used in the case of driving in an urban area. On the other hand, the high beam illuminates a wide range of the front and a distant place with a relatively high illuminance, and is mainly used in the case of driving at a high speed on a road where there are few oncoming vehicles or preceding vehicles. Therefore, the high beam is more excellent in visibility for the driver than the low beam, but there is a problem that glare is caused to the driver or a pedestrian of a vehicle existing in front of the vehicle.

[0003] In recent years, an ADB (Adaptive Driving Beam) technology has been proposed, which dynamically and adaptively controls the light distribution pattern of the high beam based on the state around the vehicle. The ADB technology detects a preceding vehicle, an oncoming vehicle (collectively referred to as a front vehicle), a pedestrian, or a sign (hereinafter collectively referred to as a target) in front of the vehicle, and reduces glare to the vehicle by shading or dimming the region corresponding to the vehicle.

[0004] A technology has been proposed in which a pattern or characters or the like for driving assistance or the like are drawn on the road surface with a lamp having a high resolution in space.

[0005] [Related Art Documents]

[0006] [Patent Documents]

[0007] Patent Document 1: International Publication WO2020 / 262445A1 SUMMARY

[0008] [Problems to be Solved by the Invention]

[0009] Figure 1 is a drawing that explains a problem that occurs in road surface drawing. The attitude (pitch angle) θp of the vehicle body dynamically changes according to the difference in height and the unevenness of the road surface in the running of the vehicle. When the attitude of the vehicle body changes, the optical axis of the light beam BM for road surface drawing changes, and the drawing position of the pattern on the road surface changes. In Figure 1 , a case of drawing of a pattern when a large vibration occurs is shown.

[0010] With respect to the change in the drawing position that follows the change in the pitch angle θp at a degree that is slower than the degree that the human eye can follow, it is sufficient to control the lamp so that the pattern is drawn at the same position on the road surface (based on the vehicle body) following the change in the pitch angle θp.

[0011] However, in a case where the change in the pitch angle is high speed, the pattern depicted on the road surface will shake, and the visibility will decrease.

[0012] Figure 2 is a drawing indicating a pattern depicted on a road surface. Figure 2 The left side of is an original image which is intended to be depicted on a road surface, Figure 2 The right side of indicates an image actually depicted on a road surface (depicted image). When the pitch angle θp changes at high speed within a narrow range, the pattern constituted by the figures is visually recognized in a form extending in the front-rear direction with respect to the vehicle body by a person represented by a driver. Thus, the distance between the figures will become close, or the scale of the figures will be distorted, and the visibility will decrease.

[0013] In addition, the problem cannot be understood as a common knowledge of those skilled in the art, and is recognized by the present inventors alone.

[0014] The present disclosure is completed in the above-described situation, and one of the exemplary objects thereof is to improve the visibility of road surface depiction.

[0015] [Technical Solution for Solving Technical Problem]

[0016] One aspect of the present disclosure relates to a light fixture system. The light fixture system includes a light distribution variable light including a plurality of pixels individually controllable in accordance with an input image, and configured to irradiate a road surface with a light beam having a light distribution pattern corresponding to a state of the plurality of pixels; a sensor configured to detect a vibration of a vehicle body; and a controller configured to generate the input image. The controller generates the input image by reducing a size of a figure included in an original image indicating a pattern intended to be depicted on the road surface, the size corresponding to a direction of the vibration.

[0017] Another aspect of the present disclosure relates to a control method of a light distribution variable light. The light distribution variable light includes a plurality of pixels individually controllable in accordance with an input image, and is configured to irradiate a road surface with a light beam having a light distribution pattern corresponding to a state of the plurality of pixels. The control method includes a step of detecting a vibration of a vehicle body, a step of generating an original image indicating a pattern intended to be depicted on the road surface, and a step of generating the input image by reducing a size of a figure included in the original image, the size corresponding to a direction of the vibration.

[0018] In addition, a result of arbitrarily combining the above-described constituent elements, or mutually replacing the constituent elements or expression manners between methods, apparatuses, systems, and the like, is also effective as an aspect of the present disclosure or the present disclosure. Furthermore, the description of this item (means for solving the problem) does not describe all indispensable features of the present disclosure, and thus a sub-combination of the features described can also be the present disclosure.

[0019] Effects of Invention

[0020] According to one aspect of the present disclosure, it is possible to improve the visibility of a road marking. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a diagram for explaining a problem occurring in a road marking.

[0022] Figure 2 is a diagram showing a pattern marked on a road.

[0023] Figure 3 is a block diagram of a light fixture system of an embodiment.

[0024] Figure 4 is a block diagram of a controller of one embodiment.

[0025] Figure 5 is a diagram for explaining a correction process based on a controller.

[0026] Figure 6 is a diagram for explaining a specific example of a correction process.

[0027] Figure 7 is a diagram for explaining a specific example of a correction process.

[0028] Figure 8 is a diagram for explaining a correction process corresponding to the magnitude of a vibration.

[0029] Figure 9 is a diagram for explaining a correction process corresponding to the magnitude of a vibration.

[0030] Figure 10 is a diagram showing an example of a correction control. DETAILED DESCRIPTION

[0031] (SUMMARY OF EMBODIMENTS)

[0032] A summary of several exemplary embodiments of the present disclosure is described. The summary is provided as a prelude to the detailed description that follows, for the purpose of enabling an understanding of the basic concepts of the embodiments, and to simplify several concepts of one or more embodiments, and does not limit the scope of the invention or disclosure. In addition, the summary is not a comprehensive summary of all conceivable embodiments, and does not limit the essential elements of the embodiments. For convenience, "one embodiment" is sometimes used as a reference to one embodiment (example or modification) or multiple embodiments (examples or modifications) disclosed in this specification.

[0033] The light fixture system of one embodiment includes a light distribution variable light including a plurality of pixels individually controllable according to an input image, and irradiating a road surface with a light beam having a light distribution pattern corresponding to states of the plurality of pixels; a sensor configured to detect a vibration of a vehicle body; and a controller generating the input image. The controller generates the input image by reducing a size of a pattern included in an original image that prescribes the pattern to be drawn on the road surface, in a direction of the vibration.

[0034] According to this configuration, when the vibration is detected, the pattern having the reduced size in the direction of the vibration is drawn on the road surface, and the image is rapidly vibrated, so that the pattern having the same appropriate size as the original image is recognized in the direction of the vibration by the human eye. Thus, the visibility can be improved.

[0035] In one embodiment, the direction of the vibration can be a pitch direction. The vehicle body is easily swung in the front-back direction in its configuration. Thus, the visibility can be improved by detecting the vibration in the pitch direction and reducing the size (width or length) of the pattern in the front-back direction, so that the control is facilitated.

[0036] In one embodiment, the degree of the size reduction can correspond to the magnitude of the vibration. Thus, the accuracy of the size of the pattern in the front-back direction can be improved.

[0037] In one embodiment, the value of each pixel of the input image can be a logical product of a value of a pixel corresponding to the original image and values of n (n≥1) pixels adjacent to the pixel in the direction of the vibration. Thus, the size can be reduced by a simple arithmetic process.

[0038] In one embodiment, the number n can be dynamically changed according to the detected vibration. Thus, the amount of the size reduction can be controlled according to the number n. Further, the correction amount can be set to zero by setting n=0.

[0039] (Embodiment)

[0040] Hereinafter, a preferred embodiment will be described with reference to the accompanying drawings. The same or equivalent constituent elements, members, processes shown in each drawing are denoted by the same reference numerals, and redundant description is appropriately omitted. Further, the embodiment is not limited to the disclosure, and is merely illustrative, and all features and combinations thereof described in the embodiment are not necessarily essential to the disclosure.

[0041] In the present specification, the state where "member A is connected to member B" includes, in addition to the case where member A and member B are directly connected physically, the case where member A and member B are indirectly connected via another member that does not substantially affect the electrical connection state of member A and member B or does not impair the function or effect that is exerted by the combination of member A and member B.

[0042] Similarly, the state where "member C is provided between member A and member B" includes, in addition to the case where member A and member C, or member B and member C are directly connected, the case where member A and member C, or member B and member C are indirectly connected via another member that does not substantially affect the electrical connection state of member A and member C, or member B and member C or does not impair the function or effect that is exerted by the combination of member A and member C, or member B and member C.

[0043] Figure 3 is a block diagram of a lamp system 100 according to an embodiment. The lamp system 100 is a road surface delineation lamp that is mounted on an automobile and irradiates a road surface in front of the vehicle.

[0044] The lamp system 100 includes a high-precision lamp unit 110, a sensor 120, and a controller 200.

[0045] In the present embodiment, the high-precision lamp unit 110 is a light distribution variable lamp configured to be able to irradiate a road surface in front of a vehicle with a light beam. The high-precision lamp unit 110 includes a plurality of pixels PIX that can be controlled individually, and irradiates a road surface with a light beam (referred to as a road surface irradiation light beam) BM having a light distribution pattern corresponding to the state of the plurality of pixels PIX. For example, the high-precision lamp unit 110 includes a light emitting element array 112 and an irradiation optical system 114. As the light emitting element array 112, an LED array can be used.

[0046] The state, i.e., the luminance, of each pixel PIX is controlled in accordance with the pixel corresponding to the input image IMG1. The luminance of the pixel PIX can be controlled in two gray scales of on and off, or in multiple gray scales. It can also be that the multiple gray scale control changes the time ratio (duty ratio) of the on time and the off time of each pixel PIX, thereby expressing multiple gray scales by PWM dimming. In the present embodiment, for the sake of simplicity of explanation, the luminance of the pixel PIX is assumed to be controlled in two gray scales of on and off.

[0047] The irradiation optical system 114 projects the output light of the light emitting element array 112 to the front of the vehicle. The irradiation optical system 114 can be a lens optical system, a reflection optical system, or a combination thereof.

[0048] On the road surface 10, a road surface drawing light beam BM emitted by the high-precision light unit 110 forms a pattern (figure) PTN. The pattern PTN can be either figure information or character information, and the shape or meaning thereof is not limited in the present disclosure.

[0049] The light distribution pattern PTN is the intensity distribution of the light beam on the road surface 10, and is based on the pattern of the on and off of the plurality of pixels PIX of the light emitting element array 112. In addition, the position of a certain pixel PIX and the correspondence of the irradiation portion on the road surface 10 corresponding to the pixel are determined by the irradiation optical system 114, and there are cases where there is a mirror relationship (left-right inversion) or upside-down inversion, or upside-down and left-right inversion.

[0050] The sensor 120 is provided so as to be able to detect the vibration of the vehicle body on which the light fixture system 100 is mounted. For example, the sensor 120 can employ a three-axis gyro sensor. The sensor 120 can be provided on the headlamp side or on the vehicle side. In the case of the headlamp side, it can be built into the housing (light body) of the headlamp or it can be external to the light body. In the case of the vehicle side, it can be disposed inside the vehicle cabin or outside the vehicle cabin, for example, in the engine compartment.

[0051] With respect to an automobile, the inclination angle in the front-rear direction (vehicle posture) changes depending on the weight balance of the front and rear. In addition, the inclination angle also changes due to the unevenness or difference in height of the road surface during travel. The inclination angle in the front-rear direction corresponds to the rotation around the horizontal axis extending left and right along the vehicle body, and is referred to as the pitch angle (also referred to as the posture angle) θp.

[0052] The controller 200 acquires an original image IMG0 that specifies the pattern PTN that should be drawn on the road surface. For example, the controller 200 can include a non-volatile memory that stores a plurality of original images IMG0 corresponding to a plurality of patterns PTN. Also, the pattern PTN that should be drawn can be determined based on information INFO from the vehicle, and the original image IMG0 corresponding to the pattern PTN can be acquired. Alternatively, the information INFO from the vehicle can be the data of the original image IMG0. That is, the original image IMG0 can be generated anywhere.

[0053] The controller 200 generates an input image IMG1 to be supplied to the high-precision light unit 110 based on the original image IMG0. For example, the input image IMG1 is monochrome image data in which the values of the pixel groups included in the pattern PTN are 1 and the values of the pixel groups other than that are 0. The light emitting element array 112 accepts the input image IMG1, sets the pixel groups (on pixel groups) PG_ON corresponding to the pattern PTN among the plurality of pixels PIX to be on, and sets the remaining to be off.

[0054] The controller 200 performs correction to reduce the size corresponding to the direction of the vibration for each figure included in the original image IMG0, and outputs the corrected image as the input image IMG1.

[0055] Figure 4 is a block diagram of the controller 200 of one embodiment. The controller 200 includes a vibration detection section 210, an image acquisition section 220, an image correction section 230, and an image output section 240. The vibration detection section 210 detects the vibration of the vehicle body on the basis of the output Sl of the sensor 120. The vibration detection section 210 outputs a signal S2 indicating whether or not correction is needed, or the degree of correction, to the image correction section 230.

[0056] The image acquisition section 220 acquires the original image IMG0 on the basis of the information INFO from the vehicle. The image correction section 230 corrects the original image IMG0 when the signal S2 from the vibration detection section 210 indicates that correction is needed, and outputs the corrected image. In the case where no vibration is detected, the original image IMG0 is directly output. The image output section 240 is an interface for image transmission, and can be either serial or parallel. The image output section 240 supplies the image corrected (or not corrected) on the basis of the image correction section 230 as the input image IMG1 to the high-precision lamp unit 110.

[0057] The above is the configuration of the lamp system 100. Next, the operation thereof will be described.

[0058] Figure 5 is a view for describing the correction process on the basis of the controller 200. In Figure 5 , the original image IMG0, the corrected input image IMG1, and the image IMG2 drawn on the road surface are shown. In this example, the original image IMG0 includes three portions A, B, and C. When vibration in the pitch direction is detected, the controller 200 reduces the size (i.e., the length or width) in the pitch direction for each of the three portions A, B, and C. During irradiation of the road surface with the light beam BM on the basis of the input image IMG1, the light beam BM vibrates in the pitch direction, and thus the portions A', B', and C' of the input image IMG1 expand in the pitch direction. Thus, the drawn image IMG2 on the road surface approaches the original image IMG0.

[0059] The above is the operation of the lamp system 100. According to the lamp system 100, in the case where the vehicle body vibrates, the original image is corrected in consideration of expansion of the figure due to the vibration, and the light beam on the basis of the corrected input image IMG1 is irradiated to the road surface, whereby the image actually drawn on the road surface can approach the original image IMG0, and thus the visibility can be improved.

[0060] Next, the correction processing based on the image of the controller 200 will be described. The function of the controller 200 can be realized by software processing, by hardware processing, or by a combination of software processing and hardware processing. The software processing is specifically realized by a combination of a processor (hardware) such as a CPU (Central Processing Unit), an MPU (Micro Processing Unit), a microcontroller, and a software program executed by the processor (hardware). The controller 200 can also be a combination of a plurality of processors (microcontrollers).

[0061] The hardware processing is specifically realized by a hardware such as an ASIC (Application Specific Integrated Circuit) or a controller IC, an FPGA (Field Programmable Gate Array).

[0062] Figure 6 is a view for explaining the correction processing (shrink processing) in the case of reducing 1 pixel. In Figure 6 , a portion of 1 column in the original image IMG0 and a corrected image IMG1 corresponding thereto are shown. The direction of the vibration is the row direction (y). The correction processing is performed for all pixels while moving the pixel to be processed (pixel of interest) in the longitudinal and lateral directions of the image.

[0063] In the case where the pixel values on both sides adjacent to the pixel of interest 4 in the direction of the vibration are zero, the value of the pixel of interest 4 is maintained. Thus, it is possible to prevent the disappearance of the bright point of 1 pixel.

[0064] In the case where the pixel value on at least one of the sides adjacent to the pixel of interest 4 in the direction of the vibration is 1, the value of each pixel of the input image IMG1 is the logical product of the value of the pixel corresponding to the original image IMG0 and the values of n pixels (n≥1) adjacent to the pixel in the direction of the vibration (Y direction in the figure).

[0065] This processing is performed using a window 2. The window 2 is a rectangle including the pixel of interest 4, n pixels 6_1 to 6_n adjacent to the pixel of interest 4 in the direction of the vibration (row direction y), and 1 pixel 8 adjacent to the pixel of interest 4 on the opposite side. In this example, n = 1, and the window 2 includes 3 pixels in the row direction. When the direction of the vibration is reversed, the window 2 can be inverted upside down.

[0066] First, the values of the 2 pixels 8 and 6_1 sandwiching the attention pixel 4 are referred to. Then, in the case where both of them are 0, the value of the attention pixel 4 in the corrected image IMG1 is equal to the value of the attention pixel of the original image IMG0. In the figure, this processing is shown as an OR gate 600 and a selector 602.

[0067] In the case where at least one of the pixels 8 and 6_1 is 1, the value of the attention pixel 4 in the corrected image IMG1 is determined based on the pixel values of the attention pixel 4 and the pixel 6_1. Specifically, the attention pixel 4 after the image processing becomes the logical product of the attention pixel 4 and the pixel 6_1. In the figure, this processing is shown as an AND gate 604. In this example, the logical product (output of the AND gate 604) becomes 0, and the attention pixel 4 of the corrected image IMG1 becomes 0.

[0068] The window 2 first scans the 1st row in the column direction from the left end to the right end, and when it reaches the right end, it moves to the next row. When the attention pixel of the window 2 reaches the right lower pixel of the image, the scanning ends. In addition, the original image IMG0 before the correction and the corrected image IMG1 are stored in different memory spaces at the time of the correction, and the original image IMG0 is always referred to for the correction.

[0069] In addition, when the attention pixel 4 is located in the 1st row of the original image IMG0, the pixel 8 of the window 2 will exceed the original image IMG0. Therefore, it is also possible to process by adding a virtual 0th row to the original image IMG0. The value of the 0th row is the complement of the value of the 1st row of the same column. Alternatively, it is also possible to make the 1st row not be corrected and scan the attention pixel from the 2nd row onward.

[0070] Similarly, when the attention pixel 4 is located in the final row of the original image IMG0, the pixel 6 of the window 2 will exceed the original image IMG0. Therefore, it is also possible to add a virtual row to the original image IMG0. The value of the added row is the complement of the value of the final row of the same column. In the case where n > 2, n rows can be added.

[0071] It is also possible to make the window 2 scan the 1st column in the row direction from the top end to the bottom end, and when it reaches the bottom end, it moves to the next column. When the attention pixel of the window 2 reaches the right lower pixel of the image, the scanning ends.

[0072] Figure 7 is a figure that explains the correction processing (shrink processing) in the case where the image is reduced by 2 pixels. In this case, it is possible to set n = 2 and process. In the example of Figure 7 In the example of, the output of the AND gate 604 becomes 0, and the value of the attention pixel is corrected to 0. If the value of the pixel 6_2 is 1, the output of the AND gate 604 becomes 1, and the value of the attention pixel is maintained at 1.

[0073] Returning to Figure 2 The degree of expansion of the size of the road surface depiction image in the pitch direction depends on the magnitude of the vibration. Therefore, the controller 200 preferably adaptively changes the degree of size reduction in accordance with the magnitude of the vibration (pitch amount).

[0074] Figure 8 is a diagram explaining the correction processing corresponding to the magnitude of the vibration. In the case where a gyro sensor is used as the sensor 120, the angular velocity ωp around the pitch axis is detected at every sampling period. By integrating this angular velocity ωp, the pitch angle θp is obtained. In this example, the control period (update period) of the input image IMG1 supplied to the high-precision lamp unit 110 is longer than the sampling period of the sensor 120.

[0075] Alternatively, the controller 200 can determine the correction amount by detecting the amplitude of the AC component of the pitch angle θp.

[0076] Alternatively, the controller 200 can determine the correction amount on the basis of the magnitude of the angular velocity ωp.

[0077] Alternatively, the magnitude of the vibration detected in a certain control period can be utilized as the correction amount for the next control period.

[0078] When the vibration component included in the pitch angle θ is substantially zero, no correction of size reduction is performed. When a meaningful vibration component is included in the pitch angle θ, but the magnitude thereof is small, a slight correction is applied, and the input image IMG1 after correction is reduced in the pitch direction by an amount of x pixels with respect to the original image IMG0. When a meaningful vibration component is included in the pitch angle θ, and the magnitude thereof is large, a large correction is applied, and the input image IMG1 after correction is reduced in the pitch direction by an amount of x' pixels with respect to the original image IMG0 (x' > x).

[0079] Figure 9 is a diagram explaining the correction processing corresponding to the magnitude of the vibration. In the case where a gyro sensor is used as the sensor 120, the angular velocity ωp around the pitch axis is detected at every sampling period. By integrating this angular velocity ωp, the pitch angle θp is obtained. In this example, the control period (update period) of the input image IMG1 supplied to the high-precision lamp unit 110 is longer than the sampling period of the sensor 120.

[0080] When the correction amount is small, a slight correction is applied, and the input image IMG1 after correction is reduced in the pitch direction by an amount of x pixels with respect to the original image IMG0 (here, x = 1).

[0081] When the correction amount is large, a large correction is applied, and the input image IMG1 after correction is reduced in the pitch direction by an amount of y pixels with respect to the original image IMG0 (y > x, here, y = 2).

[0082] In the case where the correction processing is performed using Figure 6In the case of processing of the window 2, the correction amount can be controlled in accordance with the number n of the adjacent pixels 6.

[0083] Figure 10 is a diagram indicating an example of correction control. The output of the sensor is sampled at a predetermined sampling rate, and the pitch angle θ is updated for each sampling rate. On the other hand, the image IMG is updated at a control period longer than the sampling rate of the sensor.

[0084] For example, the input image IMG1 of a certain control period is determined based on the sensor output obtained in the preceding 1 control period. For example, the correction amount x of a certain i-th control period can be determined based on the pitch angle θp of the i-1-th control period. For example, it can also be that the change amount Δθ of the pitch angle θp in each control period is calculated, and the correction amount x is determined based on Δθ. Or, it can also be that the correction amount x is determined based on the change of the pitch angle θp, i.e., the angular velocity ω, in a certain short time (several sampling periods) just before the end of each control period.

[0085] Next, a modified example will be described.

[0086] (Modified Example 1)

[0087] In the embodiment, only the vibration around the pitch axis (pitch) has been described, but the actual vehicle body also rotates around the roll axis and the yaw axis in addition to the pitch. For example, in a state in which the vehicle body is inclined around the roll axis, when the vehicle body pitches, the vibration direction of the image on the road surface vibrates in the inclined direction with respect to the vehicle. Therefore, in this case, the image can be corrected by reducing the size in the inclined direction with respect to the figure included in the original image IMG0.

[0088] (Modified Example 2)

[0089] In the embodiment, the correction amount is controlled in three stages of 0, 1, and 2, but it can also be controlled in more stages.

[0090] (Modified Example 3)

[0091] In the embodiment, the images IMG0 and IMG1 are two gray scales, but the present disclosure is not limited thereto, and the images IMG0 and IMG1 can also be multi-gray scales.

[0092] (Modified Example 4)

[0093] The sensor that detects the vibration is not limited to the gyro sensor, and a vehicle height sensor that detects the vehicle height before and after the vehicle body can also be used.

[0094] Based on the embodiments, the present disclosure is described with specific sentences, but the embodiments only represent the principles and applications of the present disclosure, and in the embodiments, many modifications or configuration changes can be made within the scope of the idea of the present disclosure defined in the claims.

[0095] [Industrial applicability]

[0096] The present disclosure relates to a vehicle lamp.

[0097] [Explanation of reference numerals]

[0098] 100 … lamp system, 110 … high-precision lamp unit, 112 … light emitting element array, 114 … illumination optical system, PIX … pixel, 120 … sensor, 200 … controller, 210 … vibration detection section, 220 … image acquisition section, 230 … image correction section, 240 … image output section.

Claims

1. A luminaire system, characterized by including: a light distribution variable light including a plurality of pixels individually controllable according to an input image, and configured to irradiate a road surface with a light beam having a light distribution pattern corresponding to states of the plurality of pixels, a sensor configured to detect a vibration of a vehicle body, and a controller configured to generate the input image; the controller generates the input image by reducing a size of a pattern included in an original image that defines a pattern to be depicted on the road surface, in a direction of the vibration.

2. The light fixture system according to claim 1, wherein the direction of the vibration is a pitch direction.

3. The light fixture system according to claim 1 or 2, wherein a degree of the size reduction corresponds to a magnitude of the vibration.

4. The light fixture system according to claim 1 or 2, wherein a value of each pixel of the input image is a logical product of a value of a corresponding pixel of the original image and values of n (n≥1) pixels adjacent to the corresponding pixel in the direction of the vibration.

5. The light fixture system according to claim 4, wherein the number n is dynamically changed according to the vibration detected.

6. A controller configured to control a light distribution variable light; the controller being characterized in that the light distribution variable light includes a plurality of pixels individually controllable according to an input image, and is configured to irradiate a road surface with a light beam having a light distribution pattern corresponding to states of the plurality of pixels; the controller acquires an original image that defines a pattern to be depicted on the road surface, and reduces a size of a pattern included in the original image, in a direction of a vibration of a vehicle body detected, thereby generating the input image.

7. A control method for a light distribution variable light; the control method being characterized in that the light distribution variable light includes a plurality of pixels individually controllable according to an input image, and is configured to irradiate a road surface with a light beam having a light distribution pattern corresponding to states of the plurality of pixels; the control method includes: a step of detecting a vibration of a vehicle body, a step of generating an original image that defines a pattern to be depicted on the road surface, and a step of generating the input image by reducing a size of a pattern included in the original image, in a direction of the vibration.

8. A program for controlling a light distribution variable light; the program being characterized in that the light distribution variable light includes a plurality of pixels individually controllable according to an input image, and is configured to irradiate a road surface with a light beam having a light distribution pattern corresponding to states of the plurality of pixels; the program includes: a step of causing a processor to acquire information of a vibration of a vehicle body, a step of causing the processor to acquire an original image that defines a pattern to be depicted on the road surface, and a step of causing the processor to generate the input image by reducing a size of a pattern included in the original image, in a direction of the vibration.

Images