JP2021030875A - Vehicle lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a margin (non-irradiation region) between a light-dark boundary line extending in a vertical direction between a non-irradiation region and an irradiation region and a masked object (side portion) as much as possible. I will provide a. A predetermined light distribution pattern is formed by projecting a light distribution image forming region in which a light distribution image composed of a plurality of pixels is formed and the light distribution image formed in the light distribution image forming region. A vehicle lighting unit equipped with a projection optical system and a light distribution image forming means for forming the light distribution image in the light distribution image forming region, and the light distribution image forming means is in a non-lighting region. A vehicle lighting system that forms a light distribution image for a head lamp in the light distribution image forming region as the light distribution image in a state where a certain margin region is arranged around or at least a part thereof is arranged in the margin region. [Selection diagram] Fig. 1

Description

The present invention relates to a vehicle lighting system, and in particular, as much as possible a margin (non-irradiation region) between a light-dark boundary line extending in the vertical direction between a non-irradiation region and an irradiation region and a masked object (side portion). Regarding vehicle lighting systems that can be reduced.

Conventionally, the position of a masked object (for example, a preceding vehicle or an oncoming vehicle) is detected, a non-irradiated area that does not irradiate the detected masked object is set, and the set non-irradiated area and other non-irradiated areas are set. A variable light distribution type vehicle lamp capable of forming a light distribution pattern including an irradiation region that irradiates a region in a high beam region is known (see, for example, Patent Document 1).

In the vehicle lamps described in Patent Document 1, the optical axis of the vehicle lamp unit is displaced due to an assembly error when assembling the vehicle lamp unit, an installation error when the vehicle lamp unit is attached to the vehicle body, and the like. In order to suppress the irradiation of the masked object, the non-irradiated area (hereinafter referred to as “side”) is also located between the light-dark boundary line extending in the vertical direction between the non-irradiated area and the irradiated area and the masked object (side portion). There is a margin).

Japanese Patent No. 6370533

However, as a result of the examination by the present inventor, considering the assembly error when assembling the vehicle lamp unit, the mounting error when mounting the vehicle lamp unit on the vehicle body, etc., it is possible to suppress the irradiation of the masked object. It is necessary to provide a margin of about 1.5 °, and there is a problem that the irradiation area is reduced by that amount and the visibility in front of the vehicle is lowered.

The present invention has been made in view of the above circumstances, and is a margin (non-irradiation region) between the light-dark boundary line extending in the vertical direction between the non-irradiation region and the irradiation region and the masked object (side portion). It is an object of the present invention to provide a vehicle lighting system capable of reducing the number of lamps as much as possible.

In order to achieve the above object, one aspect of the present invention is a light distribution image forming region in which a light distribution image composed of a plurality of pixels is formed, and the light distribution image formed in the light distribution image forming region. A vehicle lighting equipment unit including a projection optical system for forming a predetermined light distribution pattern by projecting a light distribution image, and a light distribution image forming means for forming the light distribution image in the light distribution image forming region. The light distribution image forming means distributes a light distribution image for a head lamp as the light distribution image in a state where a margin region, which is a non-lighting region, is arranged in the periphery or at least a part thereof is arranged in the margin region. It is a vehicle lighting system formed in an optical image forming region.

According to this aspect, the margin (non-irradiation region) between the light-dark boundary line extending in the vertical direction between the non-irradiation region and the irradiation region and the masked object (side portion) can be reduced as much as possible. As a result, it is possible to irradiate a wider range as compared with the above-mentioned conventional technique, so that the visibility in front of the vehicle is improved.

Further, in the above invention, in a preferred embodiment, the light distribution image forming means forms a light distribution image for adjusting the optical axis as the light distribution image in the light distribution image forming region, and is used for the reference optical axis and the optical axis adjustment. The light distribution image forming means further includes a deviation amount storage unit that stores the deviation amount of the light distribution pattern for adjusting the optical axis formed by projecting the light distribution image from the reference point, and the deviation amount is 0. In the case of, the light distribution image for the head lamp is formed in the light distribution image forming region in a state where a margin region which is a non-lighting region is arranged around the light distribution image, and when the deviation amount is other than 0, the distribution for the head lamp is formed. The light distribution image for a head lamp is formed in the light distribution image forming region in a state where at least a part of the light image is displaced in the deviation amount storage unit and at least a part of the light image is arranged in the margin region. It is characterized by.

Further, in the above invention, a preferred embodiment is that the light axis adjustment light distribution image is a low beam light distribution image, and the light axis adjustment light distribution pattern is a low beam light distribution image projected. The low beam light distribution pattern is formed, and the reference point of the light axis adjusting light distribution pattern is an elbow point of the low beam light distribution pattern.

Further, in the above invention, preferred embodiments are a reference optical axis detecting means for detecting the reference optical axis, a reference point detecting means for detecting a reference point of the light distribution pattern for adjusting the optical axis, and the reference optical axis detecting means. A deviation amount calculation means for calculating the deviation amount between the reference optical axis detected by the above and the reference point of the optical axis adjusting light distribution pattern detected by the reference point detecting means is further provided, and the deviation amount storage is provided. The unit is characterized in that the deviation amount calculated by the deviation amount calculating means is stored.

Further, in the above invention, preferred embodiments are a reference optical axis position storage unit in which the position of the reference optical axis is stored in advance, a reference point detecting means for detecting a reference point of the optical axis adjustment light distribution pattern, and the above. A deviation amount calculation means for calculating the deviation amount between the position of the reference optical axis stored in the reference optical axis position storage unit and the position of the reference point of the optical axis adjustment light distribution pattern detected by the reference point detecting means. The deviation amount storage unit is further provided with, and is characterized in that the deviation amount calculated by the deviation amount calculation means is stored.

Further, in the above invention, a preferred embodiment is characterized in that the light distribution image for the headlamp is a light distribution image for a low beam.

Further, in the above invention, in a preferred embodiment, the light distribution image for the headlamp is vertically formed between a non-irradiated region that does not irradiate the masked object in front of the vehicle, an irradiated region, and the non-irradiated region and the irradiated region. It is a light distribution image for ADB including a light-dark boundary line extending in a direction.

Further, in the above invention, a preferred embodiment is characterized in that the distance between the masked object and the light-dark boundary line extending in the vertical direction is 0.25 ° or less.

Further, in the above invention, a preferred embodiment is further provided with a light distribution image operating means for moving the light distribution image for adjusting the optical axis.

Further, in the above invention, in a preferred embodiment, the vehicle lamp unit further includes a matrix light source including a semiconductor light emitting element group constituting the light distribution image forming region, and the light distribution image forming means is the light distribution image. It is characterized in that the point-off state of the semiconductor light emitting element group is individually controlled so that the light distribution image is formed in the formation region.

Further, in the above invention, in a preferred embodiment, the vehicle lighting unit is scanned by a light deflector, a screen member constituting the light distribution image forming region, and the light deflector to irradiate the screen member. The light distribution image forming means further comprises a light source that emits light, and is characterized in that the light deflector and the light source are controlled so that the light distribution image is formed in the light distribution image forming region. ..

Further, in the above invention, in a preferred embodiment, the vehicle lamp unit further includes a DMD including a micromirror group constituting the light distribution image forming region and a light source that emits light that irradiates the micromirror group. The light distribution image forming means is characterized in that the on / off state of the micromirror group is individually controlled so that the light distribution image is formed in the light distribution image forming region.

Further, in the above invention, a preferred embodiment is characterized in that the optical axis adjusting light distribution pattern is a pattern in which at least one of a point including a reference point and a line is combined.

It is a schematic block diagram of the vehicle lamp system 10A. This is an example of a light distribution pattern for headlamps. This is an example of the vehicle lamp unit 20. It is a front view of the light source 11. It is a flowchart for demonstrating the operation example of the vehicle lamp system 10A. It is a figure for demonstrating the relationship between the own vehicle V equipped with the vehicle lighting system 10A, and the screen S. (A) A flowchart for explaining the optical axis correction process when forming the low beam light distribution pattern P _Lo , and (b) the optical axis correction process when forming the _{ADB light distribution pattern P ADB will be described.} It is a flowchart for. It is a schematic block diagram of a vehicle lamp system 10B. It is a flowchart for demonstrating the operation example of the vehicle lamp system 10B. It is a schematic block diagram of the vehicle lamp system 10C. It is a flowchart for demonstrating the operation example of the vehicle lamp system 10C. It is another arrangement example of the image pickup apparatus 30. It is a flowchart for demonstrating another operation example of the vehicle lighting system 10A of 1st Embodiment. It is a flowchart for demonstrating another operation example of the vehicle lighting system 10B of 2nd Embodiment. It is a schematic block diagram of a vehicle lamp system 10D. It is a flowchart for demonstrating the operation example of the vehicle lamp system 10D. (A) is an example of the vehicle lamp unit 20A which is the first modification, and (b) is an example of the vehicle lamp unit 20B which is the second modification. This is an example of a vehicle lamp unit 20C using a DMD (Digital Mirror Device) 30 which is a third modification. This is an example of a vehicle lamp unit 20D using an LCD 80 (liquid crystal display), which is a fourth modification. This is a modification of the light distribution pattern P ADB for _ADB. This is an example of a modification of the optical axis adjustment light distribution image _pLo (optical axis adjustment light distribution pattern _PLo).

[First Embodiment]
Hereinafter, the vehicle lighting system 10A according to the first embodiment of the present invention will be described with reference to the accompanying drawings. Corresponding components in each figure are designated by the same reference numerals, and duplicate description is omitted.

FIG. 1 is a schematic configuration diagram of a vehicle lamp system 10A.

As shown in FIG. 1, the vehicle lamp system 10A includes a vehicle lamp unit 20, an image pickup device 30, a control unit 40, a light distribution image operation unit 50, and the like. The vehicle lighting system 10A is mounted on a vehicle such as an automobile. Hereinafter, a vehicle equipped with the vehicle lighting system 10A is referred to as a own vehicle.

The vehicle lighting unit 20 is a variable light distribution type vehicle headlight capable of forming a light distribution pattern for head lamps or a light distribution pattern for adjusting the optical axis, and is mounted on the left side and the right side of the front end portion of the own vehicle. (See FIG. 6).

FIG. 2 is an example of a light distribution pattern for a headlamp.

The light distribution pattern for the headlamp is, for example, a light distribution pattern P _{Lo for a low beam and a light distribution pattern P ADB} for an ADB (Adaptive Driving Beam).

FIG. 2A is an example of the low beam light distribution pattern P _Lo. As shown in FIG. 2A, the low beam light distribution pattern P _Lo includes a light-dark boundary line CL and a light distribution center C. The light distribution center C is the horizontal center of the light distribution pattern for the headlamp. The light distribution center C is, for example, an intersection (elbow point) of a horizontal cut-off line and a diagonal cut-off line.

FIG. 2B is an example of the _{light distribution pattern P ADB for ADB.} As shown in FIG. 2B, the ADB light distribution pattern P _ADB includes a non-irradiated region P1 that does not irradiate the masked object V1 (moving object such as a preceding vehicle or an oncoming vehicle) in front of the own vehicle, and other non-irradiated regions P1. The irradiation region P2 that irradiates the region and the light / dark boundary lines E1 and E2 extending in the vertical direction between the non-irradiation region P1 and the irradiation region P2 are included and formed in the high beam region. The non-irradiated region P1 is a darker region (dimmed region or extinguished region) than the irradiated region P2.

The optical axis adjustment light distribution pattern is, for example, a low beam light distribution pattern P _Lo (see FIG. 2A). Hereinafter, it will be described as a _{light distribution pattern P Lo} for adjusting the optical axis.

FIG. 3 is an example of the vehicle lamp unit 20.

As shown in FIG. 3, the vehicle lamp unit 20 includes a light source 11 and a projection lens 12 arranged in front of the light source 11.

FIG. 4 is a front view of the light source 11.

As shown in FIG. 4, the light source 11 is a matrix light source including a group of semiconductor light emitting elements 11a arranged in a matrix (for example, an LED chip having a total length of 32 × 128 in a total of 4096 (pixels)). The matrix light source is also referred to as an LED array light source or a pixel LED. Each semiconductor light emitting element 11a is, for example, a semiconductor light emitting element such as an LED that emits white light. The size of each semiconductor light emitting element 11a (pixel) is, for example, 0.25 ° in length × 0.25 ° in width. The semiconductor light emitting element 11a group constitutes a horizontally long rectangular light distribution image forming region A.

In the light distribution image forming region A, a light distribution image composed of a plurality of pixels, for example, a light distribution image p _{Lo for adjusting the optical axis, is formed by individually controlling the point-off state of each semiconductor light emitting element 11a group.} , A light distribution image for head lamps (light distribution image p _Lo for low beam, light distribution image p ADB for _ADB ) is formed.

4 (a) and 4 (b) are examples of _{the optical axis adjustment light distribution image p Lo} (or the low beam light distribution image p _Lo). In FIGS. 4A and 4B, the white square represents the lit semiconductor light emitting device 11a, and the filled rectangle represents the lit semiconductor light emitting device 11a.

As shown in FIGS. 4 (a) and 4 (b), the optical axis adjusting light distribution image p _Lo (or the low beam light distribution image p _Lo ) includes the light distribution image center c. The light distribution image center c is the horizontal center of the light distribution image p _Lo for adjusting the optical axis (or the light distribution image p _Lo for headlamps). The light distribution image center c is, for example, an intersection (elbow point) of a horizontal cut offline and an oblique cut offline.

4 (c) and 4 (d) are examples of the _{light distribution image p ADB for ADB.} In FIGS. 4 (c) and 4 (d), the white area represents the lit semiconductor light emitting device 11a group, and the filled area represents the lit semiconductor light emitting device 11a group.

As shown in FIGS. 4 (c) and 4 (d), the light distribution image p ADB for _ADB has a non-irradiation region p1 that does not irradiate the masked object in front of the vehicle and an irradiation region that irradiates other regions. Includes p2 and the terminators e1 and e2 extending in the vertical direction between the non-irradiated region p1 and the irradiated region p2. Further, the light distribution image p ADB for _ADB includes the light distribution image center c. The light distribution image center c is the horizontal center of the _{light distribution image p ADB for ADB.}

The projection lens 12 is a projection lens in which aberrations (curvature of field, chromatic aberration, etc.) are corrected so that the image plane becomes flat. The projection lens 12 is an example of the projection optical system of the present invention. The projection lens 12 may be composed of a plurality of lenses or may be composed of one lens. The light source 11 (light distribution image forming region A) is arranged along the image plane (plane) of the projection lens 12.

The projection lens 12 projects a light distribution image p _{Lo for adjusting the optical axis and a light distribution image for headlamps (light distribution image p Lo} for low beam, light distribution image p ADB for _ADB ) formed in the light distribution image forming region A. _{By doing so, a light distribution pattern P Lo} for adjusting the optical axis and a light distribution pattern _{for headlamps (light distribution pattern P Lo} for low beam, light distribution pattern P ADB for _ADB ) are formed on the screen S.

The light emitted from each of the semiconductor light emitting elements 11a and transmitted through the projection lens 12 is _{irradiated to the optical axis AX 20} of the vehicle lamp unit 20 in an angular direction according to each emission position. As shown in FIG. 4A, the optical axis AX ₂₀ of the vehicle lamp unit 20 passes through the horizontal center of the light distribution image forming region A and extends in a direction orthogonal to the light distribution image forming region A. ing.

_{For example, the light emitted from the position of the optical axis AX 20} of the vehicle lamp unit 20 on the light distribution image forming region A and transmitted through the projection lens 12 is parallel to the _{optical axis AX 20 of the vehicle lamp unit 20.} Illuminated in the direction.

_{Further, for example, the light emitted from a position 0.25 ° below the position of the optical axis AX 20} of the vehicle lamp unit 20 on the light distribution image forming region A and transmitted through the projection lens 12 is the optical axis AX _20. It is irradiated in the direction of 0.25 ° above. Further, for example, the light is emitted from a position 0.25 ° to the right (right toward the front of the vehicle) with respect to the position _{of the optical axis AX 20} of the vehicle lighting unit 20 on the light distribution image forming region A and is transmitted through the projection lens 12. The light is emitted in a direction of 0.25 ° to the left with respect to _{the optical axis AX 20.} The same applies to the light emitted from other positions and transmitted through the projection lens 12, and is irradiated in the direction corresponding to each emission position.

The image pickup apparatus 30 includes a camera 31 and a mask object detection unit 32.

The camera 31 is an image sensor such as a CCD sensor or a CMOS sensor, and captures an image including, for example, a masked object (moving object such as a preceding vehicle or an oncoming vehicle) in front of the own vehicle. The image pickup device 30 is provided, for example, in the vehicle interior of the own vehicle, and images the front of the own vehicle through the front glass. The central axis AX2 of the central axis AX ₃₀ that the vehicle V in the imaging region of the imaging device 30 corresponds (when the imaging device 30 is provided on the vehicle). On the other hand, as shown in FIG. 12, when the image pickup apparatus 30 is arranged behind the screen S, the central axis AX ₃₀ of the imaging region of the image pickup apparatus 30 and the reference optical axis AX1 coincide with each other.

The mask object detection unit 32 performs predetermined image processing based on the image (image data) captured by the image pickup apparatus 30, so that the position (for example, angle) of the mask object in front of the vehicle included in the image is obtained. Is detected. The masked object detection unit 32 may be provided in a device other than the imaging device 30 (for example, the control unit 40).

The control unit 40 is, for example, an ECU (Electronic Control Unit) including a CPU, a RAM, and a ROM, although not shown. The control unit 40 functions as a non-irradiation area setting unit 41 and a vehicle lamp unit control unit 42 by executing a predetermined program read from the ROM into the RAM by the CPU. The control unit 40 stores the deviation amount L1 (optical axis deviation angle; see FIG. 4B) between the reference optical axis AX1 and the light _{distribution center C of the optical axis adjustment light distribution pattern PLo.} To be equipped with. The deviation amount storage unit 43 may be provided in a unit other than the control unit 40 (for example, the vehicle lamp unit 20).

The reference optical axis AX1 is parallel to the central axis AX2 of the own vehicle V on which the vehicle lighting system 10A is mounted (see FIG. 6), and passes through the optical center of the vehicle lighting unit 20. The reference optical axis AX1 may or may not pass through the horizontal center of the light distribution image forming region A. In the present embodiment, the case where the reference optical axis AX1 passes through the horizontal center of the light distribution image forming region A will be described as an example.

The non-irradiation area setting unit 41 sets the non-irradiation area p1 that does not irradiate the masked object whose position is detected by the mask object detecting unit 32 in the light distribution image p _ADB for ADB (see FIG. 4C).

At that time, since the correction processing of the optical axis of the vehicle lamp unit 20 is executed as described later, the light-dark boundary lines E1 and E2 extending in the vertical direction between the non-irradiation region P1 and the irradiation region P2 and the masked object Margins M1 and M2 (non-irradiated region, see FIG. 2B) between V1 (side portion) can be reduced as much as possible. Specifically, the margins M1 and M2, which had to be provided at about 1.5 ° in the above-mentioned conventional technique, can be reduced within 0.25 °. As a result, it is possible to irradiate a wider range as compared with the above-mentioned conventional technique, so that the visibility in front of the own vehicle is improved.

The vehicle lighting unit control unit 42 has a light distribution image p _{Lo for adjusting the optical axis and a light distribution image for headlamps (light distribution image p Lo} for low beam, light distribution image p ADB for _ADB ) in the light distribution image forming region A. The on-off state of the semiconductor light emitting element 11a group is individually controlled so as to be formed. The vehicle lamp unit control unit 42 is an example of the light distribution image forming means of the present invention.

Optical axis adjusting light distribution image p _{Lo (or} light distribution image p _Lo for low _beam), as shown in FIG. 4 (a), the horizontal center of the light distribution image center c is the light distribution image forming area A one A case where the margin areas A1 and A2, which are non-lighting areas, are formed in the light distribution image forming area A in a state where they are arranged in the surroundings (for example, both left and right sides) and in FIG. As shown in b), it may be formed in a state where at least a part thereof is arranged in the margin region A1 (or A2).

_{The margin areas A1 and A2 are light distribution image pLo} (or low beam distribution) for adjusting the optical axis in a state where the light distribution image center c coincides with (or does not match) the horizontal center of the light distribution image formation region A. when forming the optical image p _Lo) to the light distribution image forming area a, the periphery of the optical axis adjusting light distribution image p _{Lo (or} light distribution image p _Lo low _beam) (for example, non-lighting is disposed on the left and right sides) It is an area.

The margin areas A1 and A2 are each composed of a plurality of images (for example, 14 pixels × 0.25 ° = 3.5 °). The horizontal length (number of pixels) of the margin area A1 and the horizontal length (number of pixels) of the margin area A2 may be the same or different.

Similarly, in the light distribution image p ADB for _ADB , as shown in FIG. 4 (c), the light distribution image center c coincides with (or does not coincide with) the horizontal center of the light distribution image forming region A, and When the margin areas A3 and A4, which are non-lighting areas, are formed in the light distribution image forming area A in a state where they are arranged around (for example, both left and right sides), and at least one as shown in FIG. 4 (d). The portion may be formed in a state of being arranged in the margin region A3 (or A4).

The margin areas A3 and A4 refer to the light distribution image _{p ADB} for ADB in a state where the light distribution image center c coincides with (or does not match) the horizontal center of the light distribution image formation area A. When formed in, _{it is a non-lighting area arranged around the ADB} light distribution image p ADB (for example, on both the left and right sides).

The margin regions A3 and A4 are each composed of a plurality of images (for example, 14 pixels × 0.25 ° = 3.5 °). The horizontal length (number of pixels) of the margin area A3 and the horizontal length (number of pixels) of the margin area A4 may be the same or different. Further, the horizontal lengths (number of pixels) of the margin areas A3 and A4 and the horizontal lengths (number of pixels) of the margin areas A1 and A2 may be the same or different.

The light distribution image operating unit 50 (light distribution image operating means) _{moves the light distribution image p Lo} for adjusting the optical axis (and the light distribution pattern P _Lo for adjusting the optical axis) in the moving direction (for example, in the vertical and horizontal directions) and the moving amount (for example, in the vertical and horizontal directions). It is an input device (for example, a joystick type switch) for inputting (in pixel units). The moving direction and moving amount of the light distribution image p- _Lo for adjusting the optical axis are input by the operator operating the light distribution image operation unit 50. The light distribution image operation unit 50 may be provided in the vehicle lamp unit 20 or may be provided in addition to the vehicle lamp unit 20.

When the movement direction and the movement amount of the optical axis adjustment light distribution image _pLo are input, the vehicle lamp unit control unit 42 arranges the optical axis adjustment to the position where the movement amount is moved by the input movement amount in the input movement direction. The on-off state of the semiconductor light emitting element 11a group is individually controlled so that the _{optical image pLo is formed.} As a result, the optical axis adjusting light distribution image p- _Lo is moved within the light distribution image forming region A.

Next, an operation example of the vehicle lighting system 10A will be described.

FIG. 5 is a flowchart for explaining an operation example of the vehicle lamp system 10A. Hereinafter, an operation example when adjusting the optical axis of the vehicle lamp unit 20 mounted on the left side of the front end portion of the own vehicle (the left side when facing the front of the vehicle) will be described. Regarding an example of adjusting the optical axis of the vehicle lighting unit 20 mounted on the right side of the front end of the vehicle (right side when facing the front of the vehicle), the vehicle mounted on the left side of the front end of the vehicle. Since it is the same as the operation example when adjusting the optical axis of the lamp unit 20, the description thereof will be omitted. The same applies to the following embodiments.

FIG. 6 is a diagram for explaining the relationship between the own vehicle V on which the vehicle lighting system 10A is mounted and the screen S.

First, as shown in FIG. 6, the front surface of the own vehicle V on which the vehicle lighting system 10A is mounted faces the screen S. At that time, the own vehicle V is arranged so that the central axis AX2 of the own vehicle V is orthogonal to the screen S. The screen S is, for example, a wall surface (lead surface). The distance L2 between the front surface of the own vehicle V and the screen S is, for example, about 25 m.

Next, a display M indicating the position of the reference optical axis AX1 is displayed on the screen S (step S10). The display M representing the position of the reference optical axis AX1 is, for example, a laser spot displayed at the position of the reference optical axis AX1 on the screen S. The laser spot is displayed at the position of the reference optical axis AX1 on the screen S by, for example, an operator irradiating a laser beam having a red emission color with a pointing device such as a laser pointer. The position of the reference optical axis AX1 on the screen S can be obtained by using, for example, a laser marking device. For example, the intersection of the vertical line and the horizontal line displayed on the screen S using a laser marking device can be set as the position of the reference optical axis AX1. The vertical line is displayed at a position known horizontally away from the central axis AX2 of the own vehicle V. The horizontal line is displayed at a known distance in the vertical direction from the floor on which the laser marking device is installed.

Next, the light distribution pattern P _Lo for adjusting the optical axis is displayed on the screen S (step S11). _{At that time, an optical axis adjusting light distribution image pLo} composed of a plurality of pixels is formed in the light distribution image forming region A. The optical axis adjusting light distribution image p _Lo, as shown in FIG. 4 (a), the light distribution image center c in the horizontal direction matches the horizontal center of the light distribution image forming area A, and non-lighting Margin areas A1 and A2, which are regions, are formed in a state where they are arranged around (for example, both sides in the horizontal direction).

A light distribution pattern for adjusting the optical axis P _Lo is displayed on the screen S by the thus formed optical axis adjusting light distribution image p _{Lo (which} see FIG. 4 (a)) is projected by the projection lens 12 (See step S11 in FIG. 5).

Next, the light distribution pattern P _Lo for adjusting the optical axis is moved on the screen S (step S12). Specifically, the operator adjusts the optical axis by operating the light distribution image operation unit 50 while visually observing the display M indicating the position of the reference optical axis AX1 on the screen S and the optical axis adjustment light distribution pattern P _Lo. Input the moving direction and moving amount of the optical distribution image _pLo. As a result, the optical axis adjustment light distribution pattern P _Lo is moved in pixel units toward the display M representing the position of the reference optical axis AX1 (see step S12 in FIG. 5).

Step S12, the light distribution center C of the optical axis adjusting light distribution pattern _{P Lo} matches the display M representing the position of the reference optical axis AX1: repeated until (step S13 YES) (step S13: NO).

When the light distribution center C of the optical axis adjustment light distribution pattern P _Lo matches the display M indicating the position of the reference optical axis AX1 (step S13: YES), the moving direction of the _{optical axis adjustment light distribution pattern P Lo.} And the movement amount L1 (optical axis deviation angle) is stored in the deviation amount storage unit 43 (step S14). For example, when the movement direction of the optical axis adjustment light distribution pattern P _Lo is “right” and the movement amount L1 is 14 pixels, + 3.5 ° (0.25 ° × 14) is stored in the shift amount storage unit 43. In this case, "+" represents the moving direction, and "3.5 °" represents the moving amount L1.

Next, the correction processing of the optical axis of the vehicle lamp unit 20 will be described.

First, the correction processing of the optical axis when forming the low beam light distribution pattern P _{Lo will be described.}

FIG. 7A is a flowchart for explaining the correction process of the optical axis when forming the low beam light distribution pattern P _Lo.

The process shown in FIG. 7A is realized by the control unit 40 (CPU) executing a predetermined program read from the ROM into the RAM.

When the deviation amount L1 stored in the deviation amount storage unit 43 is 0 (step S1: YES. That is, when the optical axis AX _{20 of the} vehicle lighting equipment unit 20 and the reference optical axis AX1 match), FIG. 4 ( As shown in a), in the low beam light distribution image p _Lo , the light distribution image center c coincides with the horizontal center of the light distribution image forming region A, and the margin regions A1 and A2 which are non-lighting regions are It is formed in a state of being arranged around (for example, both sides in the horizontal direction) (step S2).

_{Then, the low beam light distribution image p Lo} formed in the state where the margin regions A1 and A2 are arranged around the screen S is projected by the projection lens 12, so that the low beam light distribution pattern P _Lo is displayed on the screen S. Is displayed in.

On the other hand, when the deviation amount L1 stored in the deviation amount storage unit 43 is other than 0 (step S1: NO. That is, when the optical axis AX _{20 of the} vehicle lighting equipment unit 20 and the reference optical axis AX1 do not match). As shown in FIG. 4B, in the low beam light distribution image p _Lo , the deviation amount in the moving direction in which the light distribution image center c (and the _{entire low beam light distribution image p Lo} ) is stored in the shift amount storage unit 43. It is formed in a state where L1 is deviated. As a result, the low beam light distribution image p- _Lo is formed in a state where at least a part thereof is arranged in the margin region A1 (or A2) (step S3).

_{Then, the low beam light distribution image pLo} (see FIG. 4B) formed in a state where at least a part thereof is arranged in the margin region A1 (or A2) is projected by the projection lens 12. The low beam light distribution pattern P _Lo is displayed on the screen S in a state where the deviation amount L1 (optical axis deviation angle) is corrected.

Next, the correction processing of the optical axis when forming the light distribution pattern P _{ADB for ADB will be described.}

FIG. 7B is a flowchart for explaining the correction process of the optical axis when the light _{distribution pattern P ADB for ADB is formed.}

The process shown in FIG. 7B is realized by the control unit 40 (CPU) executing a predetermined program read from the ROM into the RAM.

When the deviation amount L1 stored in the deviation amount storage unit 43 is 0 (step S4: YES. That is, when the optical axis AX _{20 of the} vehicle lamp unit 20 and the reference optical axis AX1 match), FIG. 4 ( As shown in c), in the light distribution pattern P ADB for _ADB , the light distribution image center c coincides with the horizontal center of the light distribution image forming region A, and the margin regions A3 and A4 which are non-lighting regions are It is formed in a state of being arranged around (for example, both sides in the horizontal direction) (step S5).

_{Then, the ADB light distribution pattern P ADB} formed with the margin regions A3 and A4 arranged around (both sides in the horizontal direction) is projected by the projection lens 12, so that the ADB light distribution pattern is projected. The P _ADB is displayed on the screen S.

On the other hand, when the deviation amount L1 stored in the deviation amount storage unit 43 is other than 0 (step S4: NO. That is, when the optical axis AX _{20 of the} vehicle lamp unit 20 and the reference optical axis AX1 do not match), As shown in FIG. 4D, the ADB light distribution image p _{ADB is formed in a state in which the entire ADB} light distribution image p ADB is displaced by a deviation amount L1 in the moving direction stored in the deviation amount storage unit 43. .. As a result, the light distribution image p ADB for _ADB is formed in a state where at least a part thereof is arranged in the margin region A3 (or A4) (step S6).

_{Then, the ADB light distribution image p ADB} (see FIG. 4D) formed in a state where at least a part thereof is arranged in the margin region A3 (or A4) is projected by the projection lens 12. , ADB light distribution pattern P _ADB is displayed on the screen S in a state where the deviation amount L1 (optical axis deviation angle) is corrected.

As described above, according to the present embodiment, the margin M1 between the light-dark boundary lines E1 and E2 extending in the vertical direction between the non-irradiated region P1 and the irradiated region P2 and the masked object V1 (side portion). , M2 (see FIG. 2B) can be reduced as much as possible. Specifically, the margin (non-irradiated region) that had to be provided at about 1.5 ° in the above-mentioned conventional technique can be reduced within 0.25 °. As a result, it is possible to irradiate a wider range as compared with the above-mentioned conventional technique, so that the visibility in front of the vehicle is improved. The margins M1 and M2 can be further reduced by using a matrix light source having a pixel size of 0.25 ° in length × 0.25 ° in width or less as the light source 11.

This is because the optical axis deviation (deviation amount L1) of the vehicle lamp unit 20 due to an assembly error when assembling the vehicle lamp unit 20, an installation error when the vehicle lamp unit 20 is attached to the vehicle body, or the like is described above. This is because the correction is performed by performing the correction processing of the optical axis of the vehicle lamp unit 20 as described above.

[Second Embodiment]
Next, the vehicle lighting system 10B according to the second embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 8 is a schematic configuration diagram of the vehicle lamp system 10B.

As shown in FIG. 8, the vehicle lighting system 10B corresponds to the vehicle lighting system 10A of the first embodiment in which the reference optical axis detection unit 33 and the light distribution center detection unit 34 are added. Other than that, it has the same configuration as the vehicle lighting system 10A of the first embodiment. Hereinafter, the differences from the vehicle lighting system 10A of the first embodiment will be mainly described, and the same reference numerals will be given to the same configurations as the vehicle lighting system 10A of the first embodiment, and the description thereof will be omitted.

The reference optical axis detection unit 33 (reference optical axis detection means) performs predetermined image processing based on an image (image data) including a display M representing the position of the reference optical axis AX1 imaged by the image pickup apparatus 30. The position (for example, angle) of the reference optical axis AX1 is detected. The reference optical axis detection unit 33 may be provided in a device other than the image pickup device 30 (for example, the control unit 40).

The light distribution center detection unit 34 (reference point detection means) performs predetermined image processing based on an image (image data) including _{an optical axis adjustment light distribution pattern P Lo imaged by the image pickup device 30, thereby performing the light.} The position (for example, angle) of the light distribution center C of the axis adjustment light distribution pattern P _{Lo is detected.} Light distribution center C of the optical axis adjusting light distribution pattern P _Lo is an example of a reference point of the light distribution pattern for the optical axis adjustment of the present invention. The same applies to the following embodiments. The light distribution center detection unit 34 may be provided in a place other than the image pickup device 30 (for example, the control unit 40).

Next, an operation example of the vehicle lighting system 10B will be described.

FIG. 9 is a flowchart for explaining an operation example of the vehicle lamp system 10B.

First, as shown in FIG. 6, the front surface of the own vehicle V on which the vehicle lighting system 10B is mounted faces the screen S. At that time, the own vehicle V is arranged so that the central axis AX2 of the own vehicle V is orthogonal to the screen S. The screen S is, for example, a wall surface (lead surface). The distance L2 between the front surface of the own vehicle V and the screen S is, for example, about 25 m.

Next, a display M indicating the position of the reference optical axis AX1 is displayed on the screen S (step S20). The display M representing the position of the reference optical axis AX1 is, for example, a laser spot displayed at the position of the reference optical axis AX1 on the screen S. The laser spot is displayed at the position of the reference optical axis AX1 on the screen S by, for example, an operator irradiating a laser beam having a red emission color with a pointing device such as a laser pointer.

Next, the light distribution pattern P _Lo for adjusting the optical axis is displayed on the screen S (step S21). _{At that time, an optical axis adjusting light distribution image pLo} composed of a plurality of pixels is formed in the light distribution image forming region A. The optical axis adjusting light distribution image p _Lo, as shown in FIG. 4 (a), the light distribution image center c in the horizontal direction matches the horizontal center of the light distribution image forming area A, and non-lighting Margin areas A1 and A2, which are regions, are formed in a state where they are arranged around (for example, both sides in the horizontal direction).

A light distribution pattern for adjusting the optical axis P _Lo is displayed on the screen S by the thus formed optical axis adjusting light distribution image p _{Lo (which} see FIG. 4 (a)) is projected by the projection lens 12 (See step S21 in FIG. 9).

Next, the display M representing the position of the reference optical axis AX1 and the optical axis adjustment light distribution pattern P _Lo are imaged by the image pickup apparatus 30 (step S22). At that time, as the image pickup device 30, one mounted on the own vehicle V may be used, or as shown in FIG. 12, one arranged behind the screen S (transmissive screen) may be used. .. FIG. 12 is another arrangement example of the image pickup apparatus 30.

Next, the reference optical axis detection unit 33 detects the position (for example, angle) of the reference optical axis AX1 by performing predetermined image processing based on the image (image data) captured by the imaging device 30 (for example, the angle). Step S23). Further, the light distribution center detection unit 34 performs predetermined image processing based on the image (image data) captured by the image pickup apparatus 30, so that the position of the light distribution center C of the _{optical axis adjustment light distribution pattern P Lo is performed.} (For example, angle) is detected (step S23).

Next, the light distribution pattern P _Lo for adjusting the optical axis is moved on the screen S (step S24). Specifically, the optical axis adjustment light distribution pattern P _Lo is moved in pixel units toward the display M representing the position of the reference optical axis AX1 (see step S24 in FIG. 9). This movement is automatically performed, for example, by the vehicle lamp unit control unit 42 individually controlling the on / off state of the semiconductor light emitting element 11a group. The step (step S24) of moving the optical axis adjustment light distribution pattern P _Lo on the screen S may be omitted.

Step S24 is repeated until the light distribution center C of the optical axis adjustment light distribution pattern P _Lo coincides with the display M indicating the position of the reference optical axis AX1 (step S25: YES) (step S25: NO).

When the light distribution center C of the optical axis adjustment light distribution pattern P _Lo matches the display M indicating the position of the reference optical axis AX1 (step S25: YES), the moving direction of the _{optical axis adjustment light distribution pattern P Lo.} And the movement amount L1 (optical axis deviation angle) is stored in the deviation amount storage unit 43 (step S26). For example, when the movement direction of the optical axis adjustment light distribution pattern P _Lo is “right” and the movement amount L1 is 14 pixels, + 3.5 ° (0.25 ° × 14) is stored in the shift amount storage unit 43. In this case, "+" represents the moving direction, and "3.5 °" represents the moving amount L1.

After that, the correction process of the optical axis of the vehicle lamp unit 20 is executed. Since the correction processing of the optical axis of the vehicle lamp unit 20 is the same as that of the first embodiment, the description thereof will be omitted.

The same effect as that of the first embodiment can be obtained by this embodiment as well.

Further, according to the present embodiment, the light _{distribution center C of the optical axis adjustment light distribution pattern P Lo and} the display M indicating the position of the reference optical axis AX1 can be accurately matched without being visually observed by an operator. As a result, the accuracy of the movement amount L1 and the accuracy of the correction processing of the optical axis of the vehicle lamp unit 20 are improved.

[Third Embodiment]
Next, the vehicle lighting system 10C according to the third embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 10 is a schematic configuration diagram of the vehicle lamp system 10C.

As shown in FIG. 10, the vehicle lighting system 10C of the third embodiment adds a reference optical axis position storage unit 44 and a deviation amount calculation unit 45 to the vehicle lighting system 10B of the second embodiment, and is a reference. Corresponds to the one in which the optical axis detection unit 33 is omitted. Other than that, it has the same configuration as the vehicle lighting system 10B of the second embodiment. Hereinafter, the differences from the vehicle lighting system 10B of the second embodiment will be mainly described, and the same reference numerals will be given to the same configurations as the vehicle lighting system 10B of the second embodiment, and the description thereof will be omitted.

The reference optical axis position storage unit 44 stores in advance, for example, the position (for example, an angle) _{of the central axis AX 30} of the imaging region of the image pickup apparatus 30 as the position of the reference optical axis AX1.

The deviation amount calculation unit 45 uses the position of the reference optical axis AX1 (central axis AX ₃₀ of the imaging region of the imaging device 30) stored in the reference optical axis position storage unit 44 and the optical axis detected by the light distribution center detection unit 34. The amount of deviation (optical axis deviation angle) from the position (for example, angle) of the light distribution center C of the adjustment light distribution pattern P _{Lo is calculated.}

Next, an operation example of the vehicle lighting system 10C will be described.

FIG. 11 is a flowchart for explaining an operation example of the vehicle lamp system 10C.

First, as shown in FIG. 6, the front surface of the own vehicle V on which the vehicle lighting system 10C is mounted faces the screen S. At that time, the own vehicle V is arranged so that the central axis AX2 of the own vehicle V is orthogonal to the screen S. The screen S is, for example, a wall surface (lead surface). The distance L2 between the front surface of the own vehicle V and the screen S is, for example, about 25 m.

Next, the light distribution pattern P _Lo for adjusting the optical axis is displayed on the screen S (step S30). _{At that time, an optical axis adjusting light distribution image pLo} composed of a plurality of pixels is formed in the light distribution image forming region A. The optical axis adjusting light distribution image p _Lo, as shown in FIG. 4 (a), the light distribution image center c in the horizontal direction matches the horizontal center of the light distribution image forming area A, and non-lighting Margin areas A1 and A2, which are regions, are formed in a state where they are arranged around (for example, both sides in the horizontal direction).

A light distribution pattern for adjusting the optical axis P _Lo is displayed on the screen S by the thus formed optical axis adjusting light distribution image p _{Lo (which} see FIG. 4 (a)) is projected by the projection lens 12 (See step S30 in FIG. 11).

Next, the imaging device 30 is set (step S31). _{Specifically, the central axis AX 30} of the imaging region of the imaging device 30 and the reference optical axis AX1 are matched. At that time, as the image pickup device 30, one mounted on the own vehicle V may be used, or as shown in FIG. 12, one arranged behind the screen S (transmissive screen) may be used. ..

Next, the position of the reference optical axis AX1 (the central axis AX ₃₀ of the imaging region of the imaging device 30) is read out from the reference optical axis position storage unit 44 (step S32).

Next, the light distribution pattern P _Lo for adjusting the optical axis is imaged by the image pickup apparatus 30 (step S33).

Next, the light distribution center detection unit 34 performs predetermined image processing based on the image (image data) captured by the image pickup apparatus 30, so that the light distribution center C of the _{optical axis adjustment light distribution pattern P Lo} The position (for example, the angle) is detected (step S34).

Then, the deviation amount calculating section 45 (the imaging region of the imaging device 30 the central axis _{AX 30)} reference optical axis AX1 read in step S32 the position and the optical axis adjusting light distribution pattern _{P Lo} detected in step S34 in The amount of deviation θ (optical axis deviation angle) from the position (for example, angle) of the light distribution center C is calculated (step S35). The calculated deviation amount θ is stored in the deviation amount storage unit 43 (step S36).

After that, the correction process of the optical axis of the vehicle lamp unit 20 is executed. Since the correction processing of the optical axis of the vehicle lamp unit 20 is the same as that of the first embodiment, the description thereof will be omitted.

The same effect as that of the first embodiment can be obtained by this embodiment as well.

Further, according to the present embodiment, the deviation amount θ (optical axis deviation angle) can be calculated without displaying the display M indicating the position of the reference optical axis AX1.

Further, according to the present embodiment, the deviation amount θ (optical axis deviation angle) can be calculated without moving the _{optical axis adjustment light distribution image p Lo} (and the optical axis adjustment light distribution pattern P _Lo). ..

[Fourth Embodiment]
Next, as a fourth embodiment of the present invention, another operation example of the vehicle lamp system 10A of the first embodiment will be described.

In the fourth embodiment, as the display M indicating the position of the reference optical axis AX1, a circular frame painted or pasted on the screen S is used instead of the laser spot described in the first embodiment. Other than that, it is the same as that of the first embodiment. Hereinafter, the differences from the first embodiment will be mainly described.

FIG. 13 is a flowchart for explaining another operation example of the vehicle lamp system 10A of the first embodiment.

In the following description, it is assumed that a circular frame centered on the reference optical axis AX1 is painted or pasted in advance as a display M indicating the position of the reference optical axis AX1 on the screen S (step S41 in FIG. 13). reference). Hereinafter, it will be referred to as a circular frame M.

First, as shown in FIG. 6, the front surface of the own vehicle V on which the vehicle lighting system 10A is mounted faces the screen S. At that time, the own vehicle V is arranged so that the central axis AX2 of the own vehicle V is orthogonal to the screen S. The screen S is, for example, a wall surface (lead surface). The distance L2 between the front surface of the own vehicle V and the screen S is, for example, about 25 m.

Next, the light distribution pattern P _Lo for adjusting the optical axis is displayed on the screen S (step S41). _{At that time, an optical axis adjusting light distribution image pLo} composed of a plurality of pixels is formed in the light distribution image forming region A. The optical axis adjusting light distribution image p _Lo, as shown in FIG. 4 (a), the light distribution image center c in the horizontal direction matches the horizontal center of the light distribution image forming area A, and non-lighting Margin areas A1 and A2, which are regions, are formed in a state where they are arranged around (for example, both sides in the horizontal direction).

A light distribution pattern for adjusting the optical axis P _Lo is displayed on the screen S by the thus formed optical axis adjusting light distribution image p _{Lo (which} see FIG. 4 (a)) is projected by the projection lens 12 (See step S41 in FIG. 13).

Next, the light distribution pattern P _Lo for adjusting the optical axis is moved on the screen S (step S42). Specifically, the operator operates the light distribution image operation unit 50 while visually observing the circular frame M on the screen S and the light distribution pattern P _{Lo for optical axis adjustment to obtain the light distribution image p Lo for optical axis adjustment.} Enter the movement direction and movement amount. As a result, the optical axis adjustment light distribution pattern P _Lo is moved toward the circular frame M in pixel units (see step S42 in FIG. 13).

Step S42 is a light distribution center C of the optical axis adjusting light distribution pattern _{P Lo} coincides with the center position of the circular frame M (position of the reference optical axis AX1) (Step S43: YES) are repeated until (step S43: NO) ..

When the light distribution center C of the optical axis adjustment light distribution pattern P _Lo matches the center position of the circular frame M (the position of the reference optical axis AX1) (step S43: YES), the optical axis adjustment light distribution pattern P _{The movement direction of Lo} and the movement amount L1 (optical axis deviation angle) are stored in the deviation amount storage unit 43 (step S44). For example, when the movement direction of the optical axis adjustment light distribution pattern P _Lo is “right” and the movement amount L1 is 14 pixels, + 3.5 ° (0.25 ° × 14) is stored in the shift amount storage unit 43. In this case, "+" represents the moving direction, and "3.5 °" represents the moving amount L1.

After that, the correction process of the optical axis of the vehicle lamp unit 20 is executed. Since the correction processing of the optical axis of the vehicle lamp unit 20 is the same as that of the first embodiment, the description thereof will be omitted.

The same effect as that of the first embodiment can be obtained by this embodiment as well.

[Fifth Embodiment]
Next, as a fifth embodiment of the present invention, another operation example of the vehicle lamp system 10B of the second embodiment will be described.

In the fifth embodiment, as the display M indicating the position of the reference optical axis AX1, a circular frame painted or pasted on the screen S is used instead of the laser spot described in the second embodiment. Other than that, it is the same as that of the second embodiment. Hereinafter, the differences from the second embodiment will be mainly described.

FIG. 14 is a flowchart for explaining another operation example of the vehicle lamp system 10B of the second embodiment.

In the following description, it is assumed that a circular frame centered on the reference optical axis AX1 is painted or pasted in advance as a display M indicating the position of the reference optical axis AX1 on the screen S (see step S51 in FIG. 14). ). Hereinafter, it will be referred to as a circular frame M.

First, as shown in FIG. 6, the front surface of the own vehicle V on which the vehicle lighting system 10B is mounted faces the screen S. At that time, the own vehicle V is arranged so that the central axis AX2 of the own vehicle V is orthogonal to the screen S. The screen S is, for example, a wall surface (lead surface). The distance L2 between the front surface of the own vehicle V and the screen S is, for example, about 25 m.

Next, the light distribution pattern P _Lo for adjusting the optical axis is displayed on the screen S (step S51). _{At that time, an optical axis adjusting light distribution image pLo} composed of a plurality of pixels is formed in the light distribution image forming region A. _{As shown in FIG. 4A, the light distribution image p Lo} for adjusting the optical axis has a light distribution image center c that coincides with the horizontal center of the light distribution image forming region A and is a non-lighting region. Margin areas A1 and A2 are formed in a state of being arranged around (for example, both sides in the horizontal direction).

A light distribution pattern for adjusting the optical axis P _Lo is displayed on the screen S by the thus formed optical axis adjusting light distribution image p _{Lo (which} see FIG. 4 (a)) is projected by the projection lens 12 (See step S51 in FIG. 14).

Next, the circular frame M and the light distribution pattern P _Lo for adjusting the optical axis are imaged by the image pickup apparatus 30 (step S52). At that time, as the image pickup device 30, one mounted on the own vehicle V may be used, or as shown in FIG. 12, one arranged behind the screen S (transmissive screen) may be used. ..

Next, the reference optical axis detection unit 33 performs predetermined image processing based on the image (image data) captured by the image pickup apparatus 30, so that the center position of the circular frame M (the position of the reference optical axis AX1. For example. Angle) is detected (step S53). Further, the light distribution center detection unit 34 performs predetermined image processing based on the image (image data) captured by the image pickup apparatus 30, so that the position of the light distribution center C of the _{optical axis adjustment light distribution pattern P Lo is performed.} (For example, the angle) is detected (step S53).

Next, the light distribution pattern P _Lo for adjusting the optical axis is moved on the screen S (step S54). Specifically, the optical axis adjustment light distribution pattern P _Lo is moved toward the circular frame M in pixel units (see step S54 in FIG. 14). This movement is automatically performed, for example, by the vehicle lamp unit control unit 42 individually controlling the on / off state of the semiconductor light emitting element 11a group. The step (step S54) of moving the optical axis adjusting light distribution pattern P _Lo on the screen S may be omitted.

Step S54 is a light distribution center C of the optical axis adjusting light distribution pattern _{P Lo} coincides with the center position of the circular frame M (position of the reference optical axis AX1) (Step S55: YES) are repeated until (step S55: NO) ..

When the light distribution center C of the optical axis adjustment light distribution pattern P _Lo matches the center position of the circular frame M (the position of the reference optical axis AX1) (step S55: YES), the optical axis adjustment light distribution pattern P _{The movement direction of Lo} and the movement amount L1 (optical axis deviation angle) are stored in the deviation amount storage unit 43 (step S56). For example, when the movement direction of the optical axis adjustment light distribution pattern P _Lo is “right” and the movement amount L1 is 14 pixels, + 3.5 ° (0.25 ° × 14) is stored in the shift amount storage unit 43. In this case, "+" represents the moving direction, and "3.5 °" represents the moving amount L1.

After that, the correction process of the optical axis of the vehicle lamp unit 20 is executed. Since the correction processing of the optical axis of the vehicle lamp unit 20 is the same as that of the second embodiment, the description thereof will be omitted.

The same effect as that of the second embodiment can be obtained by this embodiment as well.

Further, according to the present embodiment, the light _{distribution center C of the optical axis adjustment light distribution pattern P Lo} and the center position of the circular frame M (the position of the reference optical axis AX1) are accurately matched without being visually observed by the operator. be able to. As a result, the accuracy of the movement amount L1 and the accuracy of the correction processing of the optical axis of the vehicle lamp unit 20 are improved.

[Sixth Embodiment]
Next, the vehicle lighting system 10D according to the sixth embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 15 is a schematic configuration diagram of the vehicle lamp system 10D.

As shown in FIG. 15, the vehicle lighting system 10D of the sixth embodiment adds a reference optical axis detection unit 33 to the vehicle lighting system 10C of the third embodiment, and adds a reference optical axis position storage unit 44 to the vehicle lighting system 10C. Corresponds to the omitted one. Further, in the sixth embodiment, a circular frame painted or pasted on the screen S is used as the display M indicating the position of the reference optical axis AX1. Other than that, it is the same as that of the third embodiment. Hereinafter, the differences from the third embodiment will be mainly described.

Next, an operation example of the vehicle lighting system 10D will be described.

FIG. 16 is a flowchart for explaining an operation example of the vehicle lamp system 10D.

In the following description, it is assumed that a circular frame centered on the reference optical axis AX1 is pre-painted or pasted on the screen S as a display M indicating the position of the reference optical axis AX1 (see step S63 in FIG. 16). ). Hereinafter, it will be referred to as a circular frame M.

First, as shown in FIG. 6, the front surface of the own vehicle V on which the vehicle lighting system 10D is mounted faces the screen S. At that time, the own vehicle V is arranged so that the central axis AX2 of the own vehicle V is orthogonal to the screen S. The screen S is, for example, a wall surface (lead surface). The distance L2 between the front surface of the own vehicle V and the screen S is, for example, about 25 m.

Next, the imaging device 30 is set (step S61). _{Specifically, the central axis AX 30} of the imaging region of the imaging device 30 and the reference optical axis AX1 are matched. At that time, as the image pickup device 30, one mounted on the own vehicle V may be used, or as shown in FIG. 12, one arranged behind the screen S (transmissive screen) may be used. ..

Next, the circular frame M is imaged by the image pickup apparatus 30 (step S62).

Next, the reference optical axis detection unit 33 performs predetermined image processing based on the image (image data) captured by the image pickup apparatus 30, so that the center position of the circular frame M (the position of the reference optical axis AX1. For example. Angle) is detected (step S63).

Next, the light distribution pattern P _Lo for adjusting the optical axis is displayed on the screen S (step S64). _{At that time, an optical axis adjusting light distribution image pLo} composed of a plurality of pixels is formed in the light distribution image forming region A. _{As shown in FIG. 4A, the light distribution image p Lo} for adjusting the optical axis has a light distribution image center c that coincides with the horizontal center of the light distribution image forming region A and is a non-lighting region. Margin areas A1 and A2 are formed in a state of being arranged around (for example, both sides in the horizontal direction).

A light distribution pattern for adjusting the optical axis P _Lo is displayed on the screen S by the thus formed optical axis adjusting light distribution image p _{Lo (which} see FIG. 4 (a)) is projected by the projection lens 12 (See step S64 in FIG. 16).

Next, the light distribution pattern P _Lo for adjusting the optical axis is imaged by the image pickup apparatus 30 (step S65).

Next, the light distribution center detection unit 34 performs predetermined image processing based on the image (image data) captured by the image pickup apparatus 30, so that the light distribution center C of the _{optical axis adjustment light distribution pattern P Lo} The position (for example, the angle) is detected (step S66).

Then, the deviation amount calculating section 45, the center position of the circular frame M detected in step S63 (the reference optical axis AX1 position) and light distribution center C of the light distribution pattern P _Lo for optical axis adjustment which is detected in step S66 The amount of deviation θ (optical axis deviation angle) from the position (for example, the angle) is calculated (step S67). The calculated deviation amount θ is stored in the deviation amount storage unit 43 (step S68).

After that, the correction process of the optical axis of the vehicle lamp unit 20 is executed. Since the correction processing of the optical axis of the vehicle lamp unit 20 is the same as that of the first embodiment, the description thereof will be omitted.

The same effect as that of the first embodiment can be obtained by this embodiment as well.

Further, according to the present embodiment, the deviation amount θ (optical axis deviation angle) can be calculated without moving the _{optical axis adjustment light distribution image p Lo} (and the optical axis adjustment light distribution pattern P _Lo). ..

Next, a modified example will be described.

In each of the above embodiments, the margin areas A1 and A2 are _{provided on the left and right sides of the optical axis adjustment light distribution image p Lo} (or the low beam light distribution image p _Lo ) (see FIG. 4A), and the margin areas A3 and A4 are provided. The following is described as an example in which the light distribution image for _ADB is provided on both the left and right sides of the ADB (see FIG. 4C), but the present invention is not limited to this. For example, although not shown, the margin areas A1 and A2 are _{provided on both the upper and lower sides of the optical axis adjustment light distribution image p Lo} (or the low beam light distribution image p _Lo ), and the margin areas A3 and A4 are provided for the ADB light distribution image p _ADB. It may be provided on both the upper and lower sides of the. In this way, not only the optical axis adjustment in the horizontal direction but also the optical axis adjustment in the vertical direction can be performed.

Further, in each of the above embodiments, as the vehicle lamp unit, the vehicle lamp unit 20 (see FIG. 3) including the light source 11 (matrix light source) including the semiconductor light emitting element 11a group constituting the light distribution image forming region A is used. The example used has been described, but the present invention is not limited to this.

FIG. 17A is an example of the vehicle lamp unit 20A which is the first modification.

As shown in FIG. 17, as a vehicle lamp unit, the light deflector 60, the screen member 61 constituting the light distribution image forming region A, and the light deflector 60 scan and emit light that irradiates the screen member 61. A vehicle lamp unit 20A including a light source 62 and a projection lens 63 may be used.

The light deflector 60 is, for example, a MEMS scanner. The drive system of the optical deflector 60 is roughly classified into a piezoelectric system, an electrostatic system, and an electromagnetic system, and any system may be used. The piezoelectric method is roughly classified into a 1-axis non-resonant / 1-axis resonance type, a 2-axis non-resonant type, and a 2-axis resonance type, and any method may be used.

The optical deflector 60 includes a mirror portion 60a (for example, a MEMS mirror) and a mirror that are swingably supported around a first axis (for example, a vertical axis) and a second axis (for example, a horizontal axis) orthogonal to the first axis. It includes a first actuator (not shown) that reciprocates the portion 60a around the first axis X1, a second actuator (not shown) that reciprocates the mirror portion 60a about the second axis X2, and the like.

The laser light scanned by the light deflector 60 irradiates the screen member 61.

The screen member 61 receives the laser light scanned by the light deflector 60 and converts at least a part of the laser light into light having a different wavelength (for example, light in the yellow region) (for example, a phosphor plate). ).

The light source 62 is a laser light source that emits laser light. As the light source 62, for example, a CAN type laser light source including a semiconductor laser element (laser diode) can be used. The emission wavelength of the laser light emitted from the light source 62 is, for example, a blue region.

In the vehicle lamp unit 20A having the above configuration, the light deflector 60 and the light source 62 are controlled according to the control from the control unit 40 (vehicle lamp unit control unit 42), so that the light distribution image forming region A has a plurality of pixels. A light distribution image composed of, for example, a light distribution image p _Lo for adjusting the optical axis and a light distribution image for a head lamp (light distribution image p _Lo for low beam, light distribution image p ADB for _ADB ) are formed.

_{Then, the light distribution image p Lo} for adjusting the optical axis and the light distribution image for the headlamp (light distribution image p _Lo for low beam, light distribution image p ADB for _ADB ) formed in the light distribution image forming region A are formed by the projection lens 63. _{By being projected, a light distribution pattern P Lo} for adjusting the optical axis and a light distribution pattern _{for headlamps (light distribution pattern P Lo} for low beam, light distribution pattern P ADB for _ADB ) are formed on the screen S. Since the vehicle lamp unit provided with the light deflector is described in detail in Japanese Patent Application Laid-Open No. 2016-123407 and the like, further description thereof will be omitted.

FIG. 17B is an example of the vehicle lamp unit 20B which is the second modification.

As shown in FIG. 17B, even if the light deflector 60, the screen member 61, and the light source 62 are arranged so that the laser light scanned by the light deflector 60 is incident on the front surface 61a of the screen member 61. Good. Such an arrangement is called a reflective type.

FIG. 18 is an example of a vehicle lamp unit 20C using a DMD (Digital Mirror Device) 30 which is a third modification.

As shown in FIG. 18, as a vehicle lamp unit, a DMD 70 including a micromirror group (not shown) constituting a light distribution image forming region A and a light source 71 (for example, a light source 71) that emits light that irradiates the micromirror group. A vehicle lamp unit 20C including a light emitting element such as an LED), a condensing lens 72 that collects light from a light source 71, a dimming plate 73 (unused light absorber), and a projection lens 74 is used. You may.

The light from the light source 71 collected by the condenser lens 72 is incident on the DMD 70 (micromirror group). The light Ray1 (on light) reflected by the micromirror at the on position in the micromirror group is incident on the projection lens 74, passes through the projection lens 74, and is irradiated to the front of the vehicle. On the other hand, the light Ray2 (off light) reflected by the micromirror at the off position in the micromirror group enters the dimming plate 73 and is absorbed by the dimming plate 73.

In the vehicle lighting unit 20C having the above configuration, the on / off state of the micromirror group is individually controlled according to the control from the control unit 40 (vehicle lighting unit control unit 42), so that a plurality of light distribution image forming regions A are formed. A light distribution image composed of pixels, for example, a light distribution image p _{Lo for adjusting the optical axis and a light distribution image for headlamps (light distribution image p Lo} for low beam, light distribution image p ADB for _ADB ) is formed.

_{Then, the light distribution image p Lo} for adjusting the optical axis and the light distribution image for the headlamp (light distribution image p _Lo for low beam, light distribution image p ADB for _ADB ) formed in the light distribution image forming region A are formed by the projection lens 74. _{By being projected, a light distribution pattern P Lo} for adjusting the optical axis and a light distribution pattern _{for headlamps (light distribution pattern P Lo} for low beam, light distribution pattern P ADB for _ADB ) are formed on the screen S. Since the vehicle lamp unit provided with the DMD is described in detail in JP-A-2016-34785, JP-A-2004-210125, and the like, further description thereof will be omitted.

FIG. 19 is an example of a vehicle lamp unit 20D using an LCD 80 (liquid crystal display), which is a fourth modification.

As shown in FIG. 19, as a vehicle lamp unit, an LCD 80 (LCD element) constituting a light distribution image forming region A, a light source 81 (for example, a semiconductor light emitting element such as an LED), a condensing optical system 82, and a polarizing axis are included. A vehicle lighting unit 20D provided with two polarizing plates 83a and 83b orthogonal to each other, a projection lens 84, and the like may be used. The LCD 80 is arranged between the two polarizing plates 83a and 83b.

The light from the light source 81 arranged by the condensing optical system 82 is incident on the LCD 80 in which the polarization direction of each pixel (not shown) is individually controlled. The amount of light transmitted through each pixel is determined by the relationship between the polarization directions of the polarizing plates 83a and 83b and the polarization direction of the light polarized by each pixel of the LCD 80.

In the vehicle lighting unit 20D having the above configuration, the light distribution image is obtained by individually controlling the polarization direction of each pixel (not shown) according to the control from the control unit 40 (vehicle lighting unit control unit 42). A light distribution image composed of a plurality of pixels in the formation region A, for example, a light distribution image p _Lo for adjusting the optical axis and a light distribution image for a head lamp (light distribution image p _Lo for low beam, light distribution image p ADB for _ADB ). It is formed.

_{Then, the light distribution image p Lo} for adjusting the optical axis and the light distribution image for the headlamp (light distribution image p _Lo for low beam, light distribution image p ADB for _ADB ) formed in the light distribution image forming region A are formed by the projection lens 84. _{By being projected, a light distribution pattern P Lo} for adjusting the optical axis and a light distribution pattern _{for headlamps (light distribution pattern P Lo} for low beam, light distribution pattern P ADB for _ADB ) are formed on the screen S. Since the vehicle lamp unit using the LCD80 is described in detail in JP-A-2016-34785, JP-A-2004-210125, and the like, further description thereof will be omitted.

In the above embodiments, the optical axis adjusting light distribution image p _{Lo (for} adjusting the optical axis the light distribution pattern P _Lo), was used for low beam light distribution image p _{Lo (light} distribution pattern P _Lo for low _beam) Example However, it is not limited to this. For example, the optical axis adjusting light distribution image p _{Lo (for} adjusting the optical axis the light distribution pattern P _Lo), the low beam light distribution image p _{Lo (low} beam light distribution pattern P _Lo) other than the optical axis adjusting only the light distribution A pattern (for example, a light distribution pattern including a reference point such as a light distribution center by a combination of lines and points) may be used. For example, as the optical axis adjustment light distribution image p _Lo (optical axis adjustment light distribution pattern P _Lo ), a combination pattern of lines and points including a reference point C may be used (see FIG. 21 (a)). A line-to-line combination pattern including the reference point C may be used (see FIG. 21 (b)), or a point-to-point combination pattern including the reference point C may be used (see FIG. 21 (c)). .. FIG. 21 is an example of a modification of the _{optical axis adjustment light distribution image p Lo} (optical axis adjustment light distribution pattern P _Lo).

_{Further, in each of the above embodiments, an example in which the light distribution center C of the optical axis adjustment light distribution pattern P Lo} is used as a reference point of the optical axis adjustment light distribution pattern has been described, but the present invention is not limited to this. For example, although not shown, a position deviated from the light distribution center C _{of the optical axis adjustment light distribution pattern P Lo} may be used as a reference point of the optical axis adjustment light distribution pattern.

Further, in each of the above embodiments, an example in which a wall surface (for example, a wall surface of a building) is used as the screen S has been described, but the present invention is not limited to this. For example, the road surface may be used as the screen S.

Further, in each of the above embodiments, an example in which a circular frame painted or attached on the screen S is used as the display M indicating the position of the reference optical axis AX1 has been described, but the present invention is not limited to this. For example, as the display M indicating the position of the reference optical axis AX1, a figure or the like, which is painted or pasted on the screen S and includes the position of the reference optical axis AX1 by a combination of lines and points, may be used.

In the above embodiments, an example has been described using the light distribution pattern P _ADB for ADB containing two light and dark boundary line CL1, CL2 extending in the longitudinal direction is not limited thereto. For example, as shown in FIG. 20, even if an _ADB light distribution pattern PADB including two vertically extending light-dark boundary lines CL1 and CL2 and two horizontally extending light-dark boundary lines CL3 and CL4 is used. Good. FIG. 20 is a modified example of the light distribution pattern P ADB for _ADB.

Further, in each of the above embodiments, an example in which the masked object is a preceding vehicle or an oncoming vehicle has been described, but the present invention is not limited to this. For example, the masked object may be a pedestrian or a bicycle.

Each numerical value shown in each of the above embodiments is an example, and it goes without saying that an appropriate numerical value different from this can be used.

Each of the above embodiments is merely an example in every respect. The present invention is not limitedly interpreted by the description of each of the above embodiments. The present invention can be practiced in various other forms without departing from its spirit or key features.

10A-10D ... Vehicle lighting system, 11 ... Light source, 11a ... Semiconductor light emitting element, 12 ... Projection lens, 20 (20A-20D) ... Vehicle lighting unit, 30 ... Imaging device, 31 ... Camera, 32 ... Masked object Detection unit, 33 ... Reference optical axis detection unit, 34 ... Light distribution center detection unit, 40 ... Control unit, 41 ... Non-irradiation area setting unit, 42 ... Vehicle lighting unit control unit, 43 ... Displacement amount storage unit, 44 ... Reference optical axis position storage unit, 45 ... deviation amount calculation unit, 50 ... light distribution image operation unit, 60 ... optical deflector, 60a ... mirror unit, 61 ... screen member, 61a ... front surface, 62 ... light source, 63 ... projection lens , 71 ... light source, 72 ... condensing lens, 73 ... dimming plate, 74 ... projection lens, 80 ... LCD, 81 ... light source, 82 ... condensing optical system, 83a ... polarizing plate, 83b ... polarizing plate, 84 ... projection lens , A ... Light distribution image forming region, A1 to A4 ... Margin region, AX1 ... Reference optical axis, AX2 ... Central axis, AX ₂₀ ... Optical axis of vehicle lighting unit 20, AX ₃₀ ... Center of imaging region of imaging device 30 Axis AX ₃₀ , C ... Light distribution center (reference point), CL ... Light / dark boundary line, CL1 to CL4 ... Light / dark boundary line, E1, E2 ... Light / dark boundary line, L1 ... Shift amount (movement amount), L2 ... Distance, M ... Display showing the position of the reference optical axis AX1 (circular frame), M1, M2 ... Margin, P1 ... Non-irradiation area, P2 ... Irradiation area, S ... Screen, V ... Own vehicle, V1 ... Masked object, c ... Arrangement Optical image center, e1 ... light-dark boundary line, e2 ... light-dark boundary line, p1 ... non-irradiation area, p2 ... irradiation area, θ ... deviation amount

Claims (13)

A light distribution image forming region in which a light distribution image composed of a plurality of pixels is formed, and a projection optical system that forms a predetermined light distribution pattern by projecting the light distribution image formed in the light distribution image forming region. Vehicle optics unit with,
A light distribution image forming means for forming the light distribution image in the light distribution image forming region is provided.
The light distribution image forming means distributes a light distribution image for a headlamp as the light distribution image in a state where a margin region, which is a non-lighting region, is arranged around the periphery or at least a part thereof is arranged in the margin region. A vehicle lighting system formed in an optical image forming area. The light distribution image forming means forms a light distribution image for adjusting the optical axis as the light distribution image in the light distribution image forming region.
A deviation amount storage unit for storing the deviation amount between the reference optical axis and the reference point of the optical axis adjustment light distribution pattern formed by projecting the optical axis adjustment light distribution image is further provided.
When the deviation amount is 0, the light distribution image forming means forms the headlamp light distribution image in the light distribution image forming region in a state where a margin region, which is a non-lighting region, is arranged around the headlamp image forming region. When the deviation amount is other than 0, the headlamp distribution is in a state where at least a part of the headlamp light distribution image is arranged in the margin area due to the deviation amount stored in the deviation amount storage unit. The vehicle lighting system according to claim 1, wherein an optical image is formed in the light distribution image forming region. The optical axis adjustment light distribution image is a low beam light distribution image.
The optical axis adjustment light distribution pattern is a low beam light distribution pattern formed by projecting the low beam light distribution image.
The vehicle lighting system according to claim 2, wherein the reference point of the light distribution pattern for adjusting the optical axis is an elbow point of the light distribution pattern for low beam. A reference optical axis detecting means for detecting the reference optical axis, and
A reference point detecting means for detecting a reference point of the light distribution pattern for adjusting the optical axis, and
Further, a deviation amount calculating means for calculating the deviation amount between the reference optical axis detected by the reference optical axis detecting means and the reference point of the optical axis adjusting light distribution pattern detected by the reference point detecting means. Prepare,
The vehicle lamp system according to claim 2 or 3, wherein the deviation amount storage unit stores the deviation amount calculated by the deviation amount calculation means. A reference optical axis position storage unit in which the position of the reference optical axis is stored in advance, and
A reference point detecting means for detecting a reference point of the light distribution pattern for adjusting the optical axis, and
Calculation of deviation amount for calculating the deviation amount between the position of the reference optical axis stored in the reference optical axis position storage unit and the position of the reference point of the optical axis adjustment light distribution pattern detected by the reference point detecting means. With more means,
The vehicle lamp system according to claim 2 or 3, wherein the deviation amount storage unit stores the deviation amount calculated by the deviation amount calculation means. The vehicle lighting system according to any one of claims 2 to 5, wherein the headlamp light distribution image is a low beam light distribution image. The light distribution image for headlamps includes a non-irradiated region that does not irradiate a masked object in front of the vehicle, an irradiated region, and a light-dark boundary line extending in the vertical direction between the non-irradiated region and the irradiated region. The vehicle lighting system according to any one of claims 2 to 5, which is a light distribution image for ADB. The vehicle lighting system according to claim 7, wherein the distance between the masked object and the light-dark boundary line extending in the vertical direction is 0.25 ° or less. The vehicle lighting system according to any one of claims 2 to 8, further comprising a light distribution image operating means for moving the light distribution image for adjusting the optical axis. The vehicle lamp unit further includes a matrix light source including a group of semiconductor light emitting elements constituting the light distribution image forming region.
The method according to any one of claims 1 to 9, wherein the light distribution image forming means individually controls the point-off state of the semiconductor light emitting element group so that the light distribution image is formed in the light distribution image forming region. The vehicle lighting system described. The vehicle lamp unit further includes a light deflector, a screen member forming the light distribution image forming region, and a light source that is scanned by the light deflector and emits light that irradiates the screen member.
The vehicle use according to any one of claims 1 to 9, wherein the light distribution image forming means controls the light deflector and the light source so that the light distribution image is formed in the light distribution image forming region. Lighting system. The vehicle lamp unit further includes a DMD including a micromirror group constituting the light distribution image forming region, and a light source that emits light that irradiates the micromirror group.
The vehicle according to any one of claims 1 to 9, wherein the light distribution image forming means individually controls an on / off state of the micromirror group so that the light distribution image is formed in the light distribution image forming region. Lighting system. The vehicle lighting system according to claim 2, wherein the optical axis adjustment light distribution pattern is a pattern in which at least one of a point including a reference point and a line is combined.