JP2002205595A - Vehicular lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting system that can light a direction of turning of a vehicle in a vehicle turn without decreasing brightness ahead of the vehicle. SOLUTION: A first lamp 2a and a second lamp 2b are provided. In a vehicle turn, the optical axis of the second lamp 2b is turned in the direction of turning to ensure brightness in the direction of turning. In this state, the brightness of the first lamp is increased to increase the luminous intensity of a non-turning side of the vehicle from the vehicle front. Visibility can be thus improved in the vehicle turn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a vehicle which is mounted on a front portion of a vehicle and emits light in front of the vehicle or in a steering direction.

[0002]

2. Description of the Related Art Conventionally used vehicle lighting devices are disclosed in, for example, Japanese Patent Application Laid-Open No.
Conventional example 1) is known. In the conventional example 1, a reflector having a light source bulb is provided behind the collimator lens, and the reflector is a collimator using a projector lamp in which a shade that blocks a part of a light beam is arranged between the collimator lens and the bulb. The optical axis can be deflected to the lens, and the shade is fixedly arranged on the collimator lens side.

[0003] With this arrangement, only the central portion of the light distribution is turned in the turning direction while the cut line having the sidewalk higher than the oncoming vehicle is fixed to the front of the vehicle, thereby improving the visibility during turning. be able to.

Another conventional example is disclosed in Japanese Patent Laid-Open No.
No. 3,385 (hereinafter referred to as Conventional Example 2) has been proposed. In the second conventional example, one lamp has a fixed reflector and a movable reflector. The optical axis of the fixed reflector is always fixed to the front of the vehicle, and light reflected by the fixed reflector and the movable reflector always illuminates the front of the vehicle. The light distribution generated by the fixed reflector is low on the oncoming vehicle side and high on the sidewalk side. When it is detected that the vehicle is turning, the movable reflector turns in the turning direction, irradiates the turning direction, and operates so as to maintain the visibility when turning and the visibility in front of the vehicle. I do.

[0005]

The light distribution of a headlight of an automobile is low on the oncoming vehicle side and low on the sidewalk side so as not to dazzle the oncoming vehicle and to improve the visibility on the sidewalk side. It is configured to be high. When the light distribution control is performed such that the entire light distribution is controlled in the turning direction at the time of turning, when there is a preceding vehicle, a bright portion of the cut line on the sidewalk side follows the preceding vehicle at the time of turning. Therefore, as compared with a headlight having a fixed light distribution, the possibility of dazzling the driver of the preceding vehicle is increased.

For this reason, Japanese Patent Application Laid-Open No. 6-12901 discloses a technique for directing only light having a fixed cut line in the turning direction.
And Japanese Patent Application Laid-Open No. 8-183385, are disclosed. In these technologies, the turning direction becomes brighter. The front could be dark.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem. It is an object of the present invention to turn a vehicle in a turning direction without losing the brightness in front of the vehicle when the vehicle turns. It is an object of the present invention to provide a vehicle lighting device capable of increasing the brightness of a vehicle.

[0008]

According to the first aspect of the present invention having the above-described structure, the invention is mounted on a front portion of a vehicle, the optical axis is rotatable in the left-right direction, and the brightness is reduced. A vehicle lighting device comprising a changeable headlight, wherein the headlight is detected based on a steering angle detecting means for detecting a steering angle of the vehicle, and a steering angle detected by the steering angle detecting means. Control means for calculating the deflection angle of the optical axis of the lamp, and the brightness of the headlight,
Driving means for performing a process of adjusting the optical axis and brightness of the headlight based on the calculation data obtained by the control means, wherein the control means outputs the light when the vehicle is in a steering neutral state. The axis is directed toward the front of the vehicle, and when the steering is performed left and right, the optical axis is controlled to rotate in the steering direction, and when the optical axis is rotated left and right, the light is emitted from the front of the vehicle to the non-turning side. It is characterized in that the brightness of the headlight is controlled so that the amount of light that flows is substantially equal to that during steering neutral.

According to a second aspect of the present invention, there is provided a vehicle speed detecting means for detecting a running speed of the vehicle, and the control means includes a vehicle speed detected by the vehicle speed detecting means and the steering angle detecting means. The deflection angle of the optical axis of the headlight is calculated based on the steering angle detected in (1).

According to a third aspect of the present invention, there is provided a vehicle speed detecting means for detecting a running speed of the vehicle, and the control means uses a vehicle speed detected by the vehicle speed detecting means and a steering angle detecting means. Based on the detected steering angle, the amount of dimming of the headlight is calculated. As the detected vehicle speed increases, when the deflection angle of the optical axis changes with the steering of the vehicle, the front of the vehicle is changed. The control is such that the amount of light irradiated to the non-turning side region from is made darker than when steering is neutral.

According to a fourth aspect of the present invention, the headlight is
A first light distribution having a cut line on the sidewalk side higher than the oncoming lane side for the vehicle, and a second light distribution having a horizontal cut line from the oncoming lane side to the sidewalk side are superimposed on one another. A light distribution pattern is formed, and the control means is capable of adjusting the brightness of the first light distribution and rotating the second light distribution in the left-right direction. When the steering is neutral, the first light distribution is controlled. The light and the optical axis of the second light distribution are directed to the front side of the vehicle, and when steered in the left-right direction, the optical axis of the second light distribution rotates in the left-right direction according to the steering amount, The brightness of the first light distribution is controlled so as to be increased stepwise or steplessly in accordance with the amount of rotation of the second light distribution.

According to a fifth aspect of the present invention, the control means adjusts the amount of deflection of the optical axis of the second light distribution with respect to the steering angle as the vehicle speed detected by the vehicle speed detection means increases. Is controlled so as to reduce the gain at the time of setting.

According to a sixth aspect of the present invention, in accordance with the present invention, the control means sets a first amount of deflection of the optical axis of the second light distribution as the vehicle speed detected by the vehicle speed detection means increases. The present invention is characterized in that control is performed so as to reduce the gain when setting the light intensity of light distribution.

According to a seventh aspect of the present invention, the control means sets a threshold value of the vehicle speed detected by the vehicle speed detection means, and when the vehicle speed becomes higher than the threshold value, the first control means sets the threshold value. The brightness of the light distribution is controlled to be stepwise or steplessly darkened according to the amount of rotation of the second light distribution.

According to an eighth aspect of the present invention, the headlight includes:
It is characterized by comprising at least one first lamp constituting the first light distribution and at least one second lamp constituting the second light distribution.

[0016]

According to the first aspect of the present invention, when the vehicle is steered left and right, the optical axis of the headlamp rotates in the steering direction, so that visibility in the steering direction can be improved. In addition, since the brightness of the headlight is controlled such that the amount of light emitted from the front of the vehicle to the non-turning side is substantially equal to that during steering neutral, the brightness in front of the vehicle is not impaired.

According to the second aspect of the present invention, the deflection angle of the optical axis of the headlight is adjusted based on the vehicle speed detected by the vehicle speed detecting means and the steering angle detected by the steering angle detecting means. It is possible to control the deflection angle appropriately.

According to the third aspect of the present invention, when the vehicle speed is high, the deflection angle of the optical axis changes based on the vehicle speed detected by the vehicle speed detection means and the steering angle detected by the steering angle detection means. Since the amount of light applied to the region on the non-turning side from the front of the vehicle is darkened, drivability can be improved.

According to the fourth aspect of the present invention, when the vehicle is steered in the left-right direction, the first light distribution having a cut line on the side of the sidewalk and the second light distribution having a horizontal cut line are selected from the following. Since the first light distribution rotates in the left-right direction and the brightness of the second light distribution is adjusted, it is possible to obtain suitable visibility suitable for the driving situation.

According to the fifth aspect of the present invention, the gain of the optical axis change amount of the first light distribution with respect to the steering angle can be changed in accordance with the vehicle speed. Control becomes possible.

According to the sixth aspect of the present invention, the first vehicle is controlled according to the vehicle speed.
Since the gain at the time of determining the amount of change in the brightness of the second light distribution with respect to the amount of deflection of the optical axis of the light distribution can be changed, suitable control can be performed according to the traveling speed of the vehicle. Become.

According to the seventh aspect of the present invention, the threshold value of the vehicle speed is set, and when the vehicle speed exceeds the threshold value, the brightness of the second light distribution is changed. Can be controlled.

According to the eighth aspect of the present invention, since there are provided the first lamp forming the first light distribution and the second lamp forming the second light distribution, the deflection amount control and the light amount control are performed. Can be implemented in an easy way.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the vehicle lighting device according to the first embodiment of the present invention. As shown in the figure, the vehicle lighting device 1 is a device that irradiates light in front of the vehicle at night, when traveling in a tunnel, or the like, and projects a visual field in the traveling direction of the vehicle clearly, and includes a first lamp 2a. And a headlamp (headlight) 2 having a second lamp 2b, a driving unit 3, a control unit 4, and a steering angle detection unit 5. It should be noted that since the vehicle is usually equipped with two head lamps on the left and right, two vehicle lighting devices 1 shown in FIG. 1 are mounted on one vehicle.

FIG. 2 is a perspective view showing the structure of a vehicle C on which the vehicle lighting device 1 according to the present embodiment is mounted. As shown in FIG. , Each is equipped with a headlamp 2. Further, inside the vehicle C, a microcomputer 6 including the driving unit 3 and the control unit 4 and a steering angle detection unit 5 for detecting a steering angle of the steering wheel are mounted.

FIG. 3 shows the left side of the vehicle C (left side in the traveling direction).
FIG. 3 is a detailed view of a headlamp 2 mounted on a first lamp (first light distribution) 2a disposed inside in the vehicle width direction.
And a second lamp (second light distribution) 2b arranged outside the first lamp 2a. Further, a vehicle width lamp 2c is provided outside the second lamp 2b.

The steering angle detecting means 5 shown in FIG. 1 detects the turning angle of the vehicle, detects the steering angle sensor 5a attached to the rotating shaft of the steering wheel, and detects the running angle of the steering wheel tire. It is composed of a tire steering angle sensor 5b.

Based on the steering angle data obtained from the steering angle detecting means 5, the control means 4 controls the deflection driving amount of the second lamp 2b (the deflection angle of the optical axis of the headlight), as will be described later. And the control light amount of the first lamp 2 a is calculated, and the calculated data is supplied to the driving unit 3. The driving means 3 includes a control means 4
The optical axis of the second lamp 2b is rotated based on the supplied signals of the deflection driving amount and the modulated light amount to change the light distribution. Further, the brightness of the first lamp 2a is changed.

FIG. 4 is an explanatory view showing a light distribution pattern (cut line) by light distribution control of the headlamp 2 mounted on the left side of the vehicle. As shown in FIG.
As shown by a symbol P1, light is emitted such that the upper side of the pattern on the oncoming vehicle side (right side in the figure) is horizontal and the upper side of the pattern on the sidewalk side (left side in the figure) is obliquely higher. . Further, the second lamp 2b emits a light distribution whose upper side is horizontal from the oncoming vehicle side to the sidewalk side, as indicated by reference numeral P2. Then, these are superimposed to form one pattern as a whole.

FIG. 5 is a schematic side view of the first lamp 2a. As shown in FIG. 5, the first lamp 2a is fixed to the base 11 having an L-shaped cross section. A reflector 12, a light source 13 attached to the inner surface side of the reflector 12, a shade 14 disposed in front of the light source 13 and configured to block direct light from the light source 13,
Is provided. Further, a dimming circuit 15 for adjusting the brightness of the light source 13 is provided.

FIG. 6 is a characteristic diagram showing the relationship between the voltage applied to the light source 13 and the brightness of the first lamp 2a when a filament such as a halogen lamp is used as the light source 13. As shown in the figure, the brightness of the light source 13 changes in proportion to the applied voltage. Accordingly, the dimming circuit 15 shown in FIG. 5 adjusts the voltage applied to the light source 13 by appropriately changing the resistance value of the variable resistor (not shown) under the control of the control means 4 to thereby control the first lamp. The brightness of 2a can be adjusted linearly or stepwise.

As the light source 13, a high-intensity discharge lamp (H
In the case of using DI), the brightness cannot be controlled by adjusting the voltage. Therefore, by controlling the pulse width, the energy supplied to the light source 13 is adjusted to adjust the brightness. That is, the dimming circuit 15 generates a rectangular wave voltage as shown in FIG. 7 and adjusts the ratio (T2 / T1) of the on-time T2 to the period T1, thereby obtaining a linear function as shown in FIG. The brightness of the first lamp 2a can be adjusted. Since the frequency of the pulse flickers when it is low, it is desirable that the frequency be 50 Hz or more.

FIG. 9 is a side view showing a schematic configuration of the second lamp 2b, and FIG. 10 is a plan view of the same. As shown,
The second lamp 2b includes a base 25 having an L-shaped cross section, a base 21 having an L-shaped cross section rotatably mounted via the base 25 and a rotating shaft 26, and attached to the base 21. Reflector 22, light source 23, shade 24,
Is provided. Further, a gear 27 disposed coaxially with the rotating shaft 26, and a gear 28 meshed with the gear 27
And a deflection motor 29 for driving the gear 28 to rotate. Then, by rotating the deflection motor 29, the base 21 can be reversibly driven to rotate as shown in FIG. 11, thereby rotating the optical axis of the second lamp 2b in the left-right direction. be able to.

FIG. 12 is an explanatory diagram showing a light distribution pattern by the first lamp 2a and the second lamp 2b described above. Reference numeral P1 indicates a light distribution pattern by the first lamp 2a. P2 indicates a light distribution pattern by the second lamp 2b. FIG. 2A shows a state in which the optical axis of the second lamp 2b is turned to the right.
Is when the optical axis of the second lamp 2b is at the center.
FIG. 3C shows a state where the optical axis of the second lamp 2b is turned to the left. As understood from the figure, by rotating the second lamp 2b, it is possible to irradiate the light distribution pattern of the fixed first lamp 2a to a wide left and right area.

Next, the operation of the first embodiment configured as described above will be described. Table 1 below shows the first
The processing method according to the embodiment is collectively described.

[0036]

[Table 1] That is, when the steering state of the vehicle is neutral, the light distribution pattern by the first lamp 2a (light distribution having a high cut line on the sidewalk side) and the light distribution pattern by the second lamp 2b (horizontal cut line) Are directed to the front of the vehicle, and their brightness remains constant without change.

When the vehicle is in a steering state, the light distribution pattern by the first lamp 2a is directed to the front, and the brightness changes as shown in Table 1. On the other hand, the light distribution pattern by the second lamp 2b increases the pan angle of the optical axis in the steering direction in proportion to the steering amount, and the brightness does not change.

Hereinafter, a specific operation will be described. FIG. 13 is a flowchart illustrating a processing procedure by the control unit 4 of the vehicle lighting device 1 according to the first embodiment.
First, processing of inputting an initial value such as setting of a sampling time (ST) is executed (step ST1). Further, the counter value "i" is set to i = 0, and the time counter value T0
(Here, it is set to count 1 in 1 ms.)
Is obtained (step ST2).

Next, for example, an end determination such as starting and stopping of the engine is executed (step ST3). If the engine is stopped (NO in step ST4), the process ends. If it is not determined that the processing is to be ended (step S
YES at T4), i is incremented (step ST)
5) Obtain a counter value Ti (step ST6).

The remainder obtained by dividing the counter value T0 by the sampling time ST (100 ms in the present embodiment) is compared with the remainder obtained by dividing the counter value Ti by the sampling time ST (step ST7). If they do not match, the process from step ST3 is repeated (NO in step ST7). On the other hand, if they match (YES in step ST7), the vehicle data shown in FIG.
The steering wheel angle δ detected by the steering angle detecting means 4 shown in FIG.
H (i) [deg] is read (step ST8). Here, [deg] indicates an angle display by the 60-minute method.

Thereafter, based on the read steering angle data, the light distribution control amount is determined by a procedure described later (step ST9), and the current counter value TNOW is further determined.
Is obtained (step ST10). When this counter value TNOW becomes equal to or greater than the value obtained by adding the preset delay time DT to the above-described counter value Ti (YES in step ST11), the control of the first lamp 2a shown in FIG. The control signal is output to the optical circuit 15, and the control signal is output to the deflection motor 29 of the second lamp 2b shown in FIG. Thereby, the dimming control of the first lamp 2a and the deflection driving of the second lamp 2b are performed (step ST12).

The delay time DT is a time from the arrival of the sampling time (ie, after YES in step ST7) until the actual execution of the light distribution control. For example, DT is set to 40 ms. . Accordingly, since the light distribution control can be performed with the delay time DT after the driver operates the steering wheel, the operation can be performed in a state in which the driver feels.

In step ST11, the delay time DT
Does not elapse, step ST10 is repeatedly executed, and when the delay time DT elapses, the processing of step ST12 is executed. In the process of step ST12, based on the light distribution control amount determined in the process of step ST9, the dimming circuit 15 of the first lamp 2a, which is an actuator, and the second lamp 2b
Is output to the deflection motor 29 of the first lamp 2.
The dimming of a and the deflection driving of the reflector 22 of the second lamp 2b are performed.

FIG. 14 is a flowchart showing in detail the process of "determining the light distribution control amount (step ST9)" shown in FIG. First, based on the steering angle δH (i) [deg] detected by the steering angle detecting means 5, a deflection drive angle of the second lamp 2b (hereinafter, referred to as a pan angle) will be described in a procedure described later. θp (i) is calculated (step S
T91).

Further, based on the pan angle θp (i), the brightness I (i) of the first lamp 2a is calculated by a procedure described later (step ST92). Next, an output value to be output to the deflection motor 29 is calculated from the above result (step ST93). The output value is the calculated second ramp 2
The value obtained by subtracting θp (i−1) calculated in the previous loop from the pan angle θp (i) of the reflector 22 of b is output to the actuator, and the deflection motor 29 is driven.

The output value to be output to the dimming circuit 15 is calculated (step ST94). As the output value, a value obtained by subtracting I (i-1) calculated in the previous loop from the calculated brightness I (i) of the first lamp 2a is set as the output value of the actuator, and the dimming circuit 15 is driven.

FIG. 15 is a flowchart showing in detail the process of “calculation of θp (i) (step ST91)” shown in FIG. In the processing here, first, the pan angle θp is calculated by multiplying a preset gain k0 by the steering angle δH (step ST910).
1). Next, a process of comparing the obtained pan angle θp with a predetermined deflection limit θpmax (soft and hard deflection limit) is performed (step ST910).
2) If θp is smaller (step ST910)
2), the pan angle θp (i) at the count value i is
θp is set (step ST9103). On the other hand, if θp is larger (NO in step ST9102), θp
(i) is set as θpmax (step ST9104).

FIG. 16 is a characteristic diagram showing the relationship between the steering angle δH of the steering wheel and the pan angle θp (i) of the reflector 22 of the second lamp 2b. As shown in FIG.
As H is increased, the pan angle θp (i) increases linearly and reaches the limit amount θpmax (the steering angle at this time is δH0), and this value θpmax is set to the maximum steering angle. It changes to maintain it up to ΔHmax. That is, when the steering angle δH becomes larger than δH0, the reflector 12 of the second lamp 2b
The pan angle θp (i) is kept at θp · max.

Next, the processing in "calculation of I (i) (step ST92)" shown in FIG. 14 will be described. In the present embodiment, five processing methods of first processing to fifth processing will be described as processing for calculating the brightness I (i) of the first lamp 2a.

In the first method, the first lamp 2a is stepped.
Is a method of changing the brightness I (i) of the lamp 2a linearly and firstly, and the third method is a method of linearly changing the brightness I (i) of the lamp 2a. Is that the brightness I (i) of the first lamp 2a is kept at a constant value until the pan angle threshold θpa, and when the brightness becomes larger than the pan angle threshold θpa,
The brightness I (i) of the lamp 2a is changed,
The fourth method is to linearly change the brightness I (i) of the first lamp up to the pan angle threshold θpa, and when the brightness is larger than the pan angle threshold θpb, the brightness I (i) of the first lamp 2a becomes The fifth method is to maintain the brightness I (i) of the first lamp 2a at a small constant value until the pan angle threshold θpa,
Until the pan angle threshold θpb, the first ramp 2a is linearly increased.
Is a method in which the brightness I (i) of the first lamp 2a is maintained at a large constant value when the brightness of the first lamp 2a is larger than the pan angle threshold θpb.

FIG. 17 is a flowchart showing the first processing procedure. As shown, in this process, first, the pan angle θp calculated in the process of step ST91 in FIG.
(i) is compared with a preset pan angle threshold θpa (step ST9201). If the pan angle θp (i) is larger than the threshold value θpa (step ST920)
(YES in 1), the brightness I (i) of the first lamp 2a is set to the maximum luminous intensity Imax (step ST92).
02). If pan angle θp (i) is smaller (NO in step ST9201), setting is made such that luminous intensity I0 is lower than maximum luminous intensity Imax (step ST920).
3).

As a result, the brightness of the first lamp 2a with respect to the pan angle θp (i) becomes the threshold θpa as shown in FIG.
Is changed in two stages with. In the present embodiment, the number of stages is two. However, it is needless to say that three or more stages can be used.

FIG. 19 is a flowchart showing the second processing procedure, and FIG. 20 is a relation between the pan angle θp (i) obtained by the second processing procedure and the brightness I (i) of the first lamp 2a. FIG. As shown in FIG. 19, in this process, brightness I (i) is obtained by the following equation (1) (step ST9204).

[0054]

(Equation 1) That is, as shown in FIG. 20, the pan angle θp (i) is the maximum value θpm
ax, the first lamp 2a emits the maximum luminous intensity Imax
And when the pan angle θp (i) is zero, the luminous intensity I0 is set to be smaller than the maximum luminous intensity Imax. Then, during this period, a linear function changes.

FIG. 21 is a flowchart showing the third processing procedure, and FIG. 22 is a relation between the pan angle θp (i) obtained by the third processing procedure and the brightness I (i) of the first lamp 2a. FIG. In this process, as shown in FIG. 21, first, the pan angle θp is compared with a predetermined threshold value θpa (step ST9205), and when θp is smaller (NO in step ST9205), the first lamp 2a Is set to a constant value I0 (step ST920).
7).

On the other hand, if θp is larger (YES in step ST9205), brightness I (i) is obtained by the following equation (2) (step ST9206).

[0057]

(Equation 2) As a result, as shown in FIG. 22, when the pan angle θp (i) is between zero and the threshold θpa, the brightness I of the first lamp 2a is
(i) becomes a constant value I0, changes linearly from the threshold value θpa to the maximum value θpmax, and changes so that the brightness reaches the maximum luminous intensity Imax.

FIG. 23 is a flowchart showing the fourth processing procedure, and FIG. 24 is a relation between the pan angle θp (i) obtained by the fourth processing procedure and the brightness I (i) of the first lamp 2a. FIG. In this process, as shown in FIG. 23, first, the pan angle θp is compared with a predetermined threshold value θpb (step ST9208), and when θp is larger (NO in step ST9208), the first lamp 2a Is set to the maximum luminous intensity Imax (step ST92).
10).

On the other hand, when θp is smaller (YES in step ST9208), brightness I (i) is obtained by the following equation (3) (step ST9209).

[0060]

(Equation 3) As a result, as shown in FIG. 24, when the pan angle θp (i) is between zero and the threshold θpb, the brightness increases linearly from the predetermined value I0 to the maximum luminous intensity Imax, and thereafter, until the angle reaches θpmax. , To maintain the maximum luminous intensity Imax.

FIG. 25 is a flowchart showing the fifth processing procedure, and FIG. 26 is a relation between the pan angle θp (i) obtained by the fifth processing procedure and the brightness I (i) of the first lamp 2a. FIG. In this process, as shown in FIG. 25, first, the pan angle θp is compared with the first threshold value θpa (step ST9211), and when θp is smaller (NO in step ST9211), the first angle is determined. The brightness of the lamp 2a is set to a predetermined luminous intensity I0 (step ST92)
14).

On the other hand, if θp is larger (YES in step ST9211), the pan angle θp and the second
Is compared with the threshold θpb (step ST9212),
If θp is larger (N in step ST9212)
O), the brightness of the first lamp 2a is set to the maximum luminous intensity Imax (step ST9215).

If θp is larger than θpa and smaller than θpb (YES in step ST9212),
The brightness I (i) is obtained by the following equation (4) (step ST9213).

[0064]

(Equation 4) As a result, as shown in FIG. 26, when the pan angle θp (i) is smaller than the first threshold value θpa, the brightness I (i) of the first lamp 2a becomes the predetermined value I0 and the second threshold value θpb If it is larger than the maximum value, it becomes the maximum value Imax. Also, the pan angle θp
In a range where (i) is between the first threshold value θpa and the second threshold value θpb, the brightness I (i) increases linearly from I0 to Imax.

In this manner, the pan angle θp (i) of the second ramp 2b is adjusted according to the steering angle δH, and the first ramp is adjusted according to the magnitude of the pan angle θp (i). Brightness I
(i) can be adjusted.

As described above, according to the vehicle lighting device 1 according to the first embodiment of the present invention, the reflector 22 of the second lamp 2b rotates left and right according to the steering angle of the vehicle, The light distribution (reference numeral P2 shown in FIG. 4) emitted by the second lamp 2b rotates according to the steering angle of the steering wheel, so that the visibility of the turning direction during turning can be improved.

Further, since the first lamp 2a has a fixed optical axis regardless of the steering angle of the steering wheel, the light distribution by the first lamp 2a (reference numeral P shown in FIG. 4) during turning of the vehicle.
1) is fixed, and only the light distribution by the second lamp 2b rotates, so that the problem of dazzling the driver of the preceding vehicle traveling in the turning direction can be solved.

Further, since the brightness of the first lamp 2a is controlled in accordance with the pan angle θp (i) of the reflector 22, the vehicle turns and the light distribution by the second lamp 2b changes in the steering direction. Even when the vehicle moves, the luminous intensity of the first lamp 2a changes so as to increase, and the visibility of the area in front of the vehicle and on the oncoming vehicle can be maintained.

Next, a second embodiment of the present invention will be described. FIG. 27 is a block diagram showing a configuration of a vehicle lighting device according to the second embodiment. As shown in FIG.
This vehicle lighting device 10 includes a first lamp 2a and a second lamp 2a.
Headlamp 2 consisting of a lamp 2b
, Control means 4, steering angle detecting means 5, and vehicle speed detecting means 7.

The vehicle speed detecting means 7 includes the vehicle lighting device 1.
0 is for detecting the traveling speed of the vehicle on which the vehicle is mounted.
The other components are the same as the components shown in FIG. 1, and therefore, are denoted by the same reference numerals and description thereof will be omitted.

In the above-described first embodiment, the first ramp 2a and the second ramp 2b are changed according to the steering angle of the steering wheel.
In the second embodiment, in addition to this, the first ramp 2a and the second ramp 2b are controlled in consideration of the traveling speed data of the vehicle obtained from the vehicle speed detection means 7. To control.

Therefore, while the vehicle is turning, the driver
The end of the course to which the vehicle should travel can be visually recognized by the light distribution of the second lamp 2b, and the first lamp 2a
Thereby, visibility on the non-turning side from the front of the vehicle can also be ensured.

The operation of the second embodiment will be described below. Table 2 below summarizes the processing method according to the second embodiment.

[0074]

[Table 2] That is, in the second embodiment, control is performed separately for the case where the vehicle speed is high and the case where the vehicle speed is low. As shown in Table 2, when the vehicle speed is low, substantially the same control as in the first embodiment is performed. When the vehicle speed is high, when the vehicle is steered, the light distribution having the high cut line on the sidewalk side (the light distribution by the first lamp 2a) is directed toward the front of the vehicle and has a horizontal cut line. Light (second
(Light distribution by the lamp 2b) increases the pan angle of the optical axis in proportion to the steering amount. Further, as the vehicle speed increases, control is performed so that the gain for determining the pan angle decreases.

The light distribution by the first lamp 2a is controlled so that the brightness increases in proportion to the pan angle of the optical axis of the second lamp 2b, and the brightness increases as the vehicle speed increases. The gain is determined so that the gain is reduced. The brightness of the light distribution by the second lamp 2b is constant.

Next, a specific processing procedure will be described. The basic processing procedure is the same as the processing procedure in the flowcharts of FIGS. 13 and 14 already described in the first embodiment, and calculates “θp (i)” (step S
T91) ”and“ Calculation of I (i) (step ST92) ”. Therefore, the processing procedure of “calculation of the pan angle θp (i) of the reflector 22 of the second lamp 2b” and “calculation of the brightness I (i) of the first lamp 2a” according to the second embodiment will be described below. Will be described. Note that "collection of vehicle data (step ST8)" shown in the flowchart of FIG.
In this process, the steering angle is collected and the traveling speed V (m / s) of the vehicle is collected.

FIG. 28 shows the pan angle θp (i) of the reflector 22.
15 is a flowchart showing the calculation procedure of the step ST9101, in which the gain “k0” shown in step ST9101 of the flowchart shown in FIG. 15 is changed to a value suitable for traveling according to the traveling speed of the vehicle.

First, the traveling speed V of the vehicle detected by the vehicle speed detecting means 7 shown in FIG.
Is compared with a preset first threshold value Va (FIG. 2).
8, step ST9105). And the speed V is the first
Is smaller than the threshold value Va (step ST910).
5; NO), and sets the gain k to a predetermined value k0 (step S5).
T9108).

If speed V is larger than first threshold value Va (YES in step ST9105), speed V is compared with second threshold value Vb (step ST9106). Then, the speed V is equal to the second threshold Vb.
If it is determined to be smaller than (step ST910
Then, the gain k is obtained by the following equation (5) (step ST9107).

[0080]

(Equation 5) Further, when it is determined that speed V is greater than second threshold value Vb (NO in step ST9106), gain k is obtained by the following equation (6) (step ST91).
09).

[0081]

(Equation 6) The symbols used in equation (6) will be described later.

FIG. 29 is a characteristic diagram showing the relationship between the running speed V of the vehicle and the gain k obtained in each of the above processes.
As can be understood from the figure, the gain k is kept constant at the predetermined value k0 until the vehicle speed V reaches the first threshold value Va from zero, and the gain k is constant between the first threshold value Va and the second threshold value Vb. In the meantime, the gain k decreases linearly as the vehicle speed V increases.
When the vehicle speed V becomes higher than the second threshold value Vb,
The gain k gradually decreases in a curve.

Then, the gain k obtained in each of the above processes is calculated.
Is multiplied by the steering angle δH to obtain a pan angle θp (step ST9110). Subsequent processing (step ST91)
Steps 11 to 9113) are the same as the steps ST9102 to ST9104 shown in FIG.

That is, θp calculated in step ST9110 is compared with a soft or hard deflection limit amount θp · max at which the second lamp 2b can be driven, and θp is set to θp · max.
If smaller than (YES in step ST9110),
For the pan angle θp (i) of the reflector 22 of the second lamp 2b,
The value of θp calculated in step ST9110 is substituted (step ST9112). If .theta.p is smaller than .theta.p.max compared to the soft or hard deflection limit .theta.p.max at which the second lamp 2b can be driven (step ST2).
9110), the reflector 22 of the second lamp 2b
Is assigned to the pan angle θp (i) of step (step ST
9113).

Therefore, the pan angle θp is determined so as to face the steering angle δH. At this time, between the steering angle δH and the pan angle θp,
There is a relationship represented by θp = k · δH. In the description of the derivation of the gain k, when the angle unit is based on the radian method and represents the angle by the 60-minute method, the subscript [de
g].

Next, the reason why the gain k is set using the above equation (6) when the vehicle speed V increases (when the vehicle speed V exceeds the second threshold value Vb) will be described. FIG. 30 is an explanatory diagram illustrating a situation in which the host vehicle C is turning on a curve having a turning radius R.

As shown in FIG. 30, the vehicle C is making a circular turn at the turning radius R in the center of the lane. Assuming that the driver in the vehicle C is visually recognizing on the vehicle traveling line, the distance L
A point Ps on the vehicle traveling line separated by s is a position that the driver wants to visually recognize. This distance Ls can be defined as the gain of the central light, as described above. At this time,
The triangle formed by the center O of the circular turn, the position point Ps desired to be visually recognized by the driver, and the front end center point Pc of the vehicle C is an isosceles triangle. The distance Ls from the front end center point Pc of the vehicle C to the position point Ps desired to be visually recognized by the driver, and the radius of the circular turn is R
, The angle θ1 formed between the line segment formed by the vehicle front end central portion Pc and the position point Ps desired to be visually recognized by the driver and the forward direction of the vehicle C can be obtained by the following equation (7). it can.

[0088]

(Equation 7) Since the lamp is brightest near the optical axis, if the lamp optical axis is moved by the angle θ1, the brightest part of the lamp illuminates the direction of the position (point Ps) that the driver wants to see. Therefore, the position (point Ps) that the driver wants to see.
Assuming that the angle θ1 between the line segment connecting the vehicle and the front end center point Pc of the host vehicle C and the forward direction of the vehicle C is the optical axis movement amount θp, θp can be obtained by the following equation (8). .

[0089]

(Equation 8) Here, when the tire steering angle when turning a curve having a radius of curvature R at a vehicle speed V is indicated by δT, the following formula (9) is used between the radius of curvature R, the vehicle speed V, and the tire steering angle δT. There is a relationship shown.

[0090]

(Equation 9) In equation (9), L0 is the wheelbase of the vehicle, A is the stability factor, and is a motion characteristic value of the vehicle C, for example, a value that determines the turning characteristic of the vehicle C.

Then, when the equation (9) is substituted into the equation (8), the following equation (10) is obtained.

[0092]

(Equation 10) Further, there is a relationship shown in the following equation (11) between the tire steering angle ΔT and the steering wheel angle ΔH.

[0093]

[Equation 11] Therefore, the expression (10) can be expressed by the following expression (12).

[0094]

(Equation 12) From the above equation (12), the following equation (13) can be obtained.

[0095]

(Equation 13) Further, when the pan angle θp [deg] is in the range of −15 ≦ θp ≦ 15, the approximate expression shown in Expression (14) holds, so (1)
From the expression (3), the following expression (15) is obtained.

[0096]

[Equation 14]

(Equation 15) Here, if θp [deg] = kδH [deg], the gain k
Can be expressed by the following equation (16).

[0097]

(Equation 16) That is, the calculation for calculating the gain k shown in step ST9109 in FIG. 28 is determined so that the reflector 22 moves to a position with excellent visibility for the driver during high-speed driving, as described above.

Next, a processing procedure for controlling the brightness of the first lamp 2a (the light intensity of the first light distribution) according to the second embodiment of the present invention will be described. The processing here is the first
14 corresponds to the processing of step ST22 in the flowchart shown in FIG. 14, and five processing procedures will be described below.

The first method is a method of changing the brightness change gain m stepwise with the speed threshold Va, and the second method is a method of changing the brightness change gain m linearly (steplessly). The third method is a method of changing the brightness change gain m linearly (steplessly) when the brightness change gain m maintains a constant value up to the speed threshold value Va and becomes larger than the speed threshold value Va. The method of the above, until the speed threshold Vb,
The brightness change gain m is changed linearly, and the speed threshold Vb
When it is larger, the brightness change gain m is kept at a constant value. The fifth method is that the brightness change gain m keeps a small constant value up to the speed threshold Va, and the brightness change gain m is kept from the speed threshold Va to the speed threshold Vb. During this period, the brightness change gain m is linearly changed, and when the speed change gain m is larger than the speed threshold value Vb, the brightness change gain m is maintained at a large constant value.

FIG. 31 is a flowchart showing a first processing procedure. First, the vehicle speed V of the own vehicle, which is obtained in the processing of “collecting vehicle data (step ST8)” shown in FIG. 12, is set in advance. The magnitude is compared with the threshold value Va (step ST9216). If vehicle speed V is lower (NO in step ST9216), gain m
Is set to a first value m0 (step ST9218). On the other hand, when the vehicle speed V is higher (step ST921)
Then, the gain m is set to the second value m1 smaller than the first value m0 (step ST9217). And
Based on the gain m obtained in the above processing, the following (1)
The brightness I (i) of the first lamp 2a is obtained by the equation (7) (step ST9219).

[0101]

[Equation 17] Here, I0 is the brightness when the pan angle θp is zero.

FIG. 32 shows the gain m with respect to the change in the vehicle speed V.
As shown, when the vehicle speed V is lower than the threshold value Va, the gain m is constant at m0, and when the vehicle speed V exceeds the threshold value Va, the gain m changes to m1. Thus, the gain m can be changed in two stages with respect to the change in the vehicle speed V. Note that here, 2
Although the change of the stage was explained, there are three or more stages,
Or you may comprise so that it may be stepless.

FIG. 33 shows the brightness I (i) of the first lamp 2a.
9 is a flowchart illustrating a second processing procedure for obtaining the following. In this process, the gain m0 when the vehicle speed V is zero and the gain m1 when the vehicle speed V is the predetermined value Va are set, and based on these data, the gain m is calculated by the following equation (18). It is obtained (step ST9222).

[0104]

(Equation 18) Next, the brightness I (i) of the first lamp 2a is obtained by the same procedure as the processing shown in the above-mentioned equation (17) (step ST9221).

FIG. 34 shows the gain m with respect to the change in the vehicle speed V.
Is a characteristic diagram showing a change in the gain m, as shown in the figure, where the gain m decreases linearly with an increase in the vehicle speed V. That is, as the vehicle speed increases, the gain m decreases, and thus the change in the brightness of the first lamp 2a with respect to the change in the steering angle decreases.

FIG. 35 shows the brightness I of the first lamp 2a.
13 is a flowchart illustrating a third processing procedure for obtaining (i). Here, first, vehicle speed V is compared with threshold value Va (step ST9222). If vehicle speed V is lower (NO in step ST9222), gain m is set to first value m0 (step ST9224). .

On the other hand, when the vehicle speed V is higher (YES in step ST9222), the gain m is obtained by the following equation (19) (step ST9223).

[0108]

[Equation 19] Here, Va is a threshold value of the vehicle speed V, m0 is a gain when the vehicle speed is 0 to Va, and m1 is a gain when the vehicle speed is Vb. Then, step ST9223 or step S
Based on the gain m obtained in the processing of T9224, the brightness I of the first lamp 2a is calculated by the above equation (17).
(i) is obtained (step ST9225).

FIG. 36 shows the gain m with respect to the change in the vehicle speed V.
FIG. 4 is a characteristic diagram showing a change in the vehicle speed V, as shown in FIG.
In the range of Va, the gain m is constant at m0, and when the vehicle speed V exceeds the threshold value Va, the gain m operates so as to decrease linearly.

FIG. 37 shows the brightness I of the first lamp 2a.
11 is a flowchart illustrating a fourth procedure for obtaining (i). Here, first, comparison between vehicle speed V and threshold value Vb is performed (step ST9226). If the vehicle speed V is higher than the threshold value Vb (step ST92)
26, NO), the gain m is set to a predetermined value m1 (step ST9228). On the other hand, if vehicle speed V is smaller than threshold value Vb (YES in step ST 9226),
A process for obtaining the gain m is performed by the following equation (20) (step ST9227).

[0111]

(Equation 20) Here, m0 is a gain when the vehicle speed V is zero,
m1 is a gain when the vehicle speed V is equal to the threshold value Vb. And
Based on the gain m obtained in the process of step ST132 or ST133, the brightness I (i) of the first lamp 2a is obtained by the above equation (17) (step ST9229).

FIG. 38 shows the gain m with respect to the change in the vehicle speed V.
FIG. 4 is a characteristic diagram showing a change in the vehicle speed V, as shown in FIG.
In the range from Vb to Vb, the gain m decreases linearly, and when the vehicle speed V exceeds the threshold value Vb, the gain m changes to a constant value m1.

FIG. 39 shows the brightness I of the first lamp 2a.
It is a flowchart which shows the 5th processing procedure for calculating | requiring (i). Here, first, the vehicle speed V and the first threshold value Va
Are compared (step ST9223), and when the vehicle speed V is smaller than the first threshold value Va (step ST9230).
NO at 230), gain m is set to first value m0 (step ST9233). If the vehicle speed V is higher than the first threshold value Va (YES in step ST9223)
ES) Then, it is compared with the second threshold value Vb (step ST9231). When the vehicle speed V is higher than the second threshold value Vb (N in step ST9231)
O), the gain m is set to a second value m1 smaller than the first value m0 (step ST9234).

On the other hand, when vehicle speed V is smaller than second threshold value Vb (YES in step ST 9231), gain m is obtained using the following equation (21) (step ST 9232).

[0115]

(Equation 21) Next, steps ST9232, ST9233, ST9
Based on the gain m obtained in 234, the aforementioned (1)
The brightness I (i) of the first lamp 2a is obtained from the equation 7) (step ST9235). FIG. 40 is a characteristic diagram showing a change in the gain m with respect to a change in the vehicle speed V. As shown, when the vehicle speed V is in the range of 0 to Va, the gain m is constant at m0, and the vehicle speed V is Vb. For ranges larger than
The gain m is constant at m1. Further, when the vehicle speed V is Va to V
When the gain is within the range b, the gain m changes so as to decrease linearly from m0 to m1.

Next, the vehicle speed V and the brightness adjustment gain m
The relationship between the brightness I (i) of the first lamp 2a and the pan angle θp (i) of the reflector 22 of the second lamp 2b (the polarization amount of the optical axis of the second light distribution) will be described. Here, the first
A case where the above-described second processing procedure (the procedure shown in FIGS. 33 and 34) is employed as a processing procedure for obtaining the brightness of the lamp 2a will be described.

FIG. 41 is an explanatory diagram corresponding to the characteristic diagram shown in FIG. 34. When the vehicle speed V increases and exceeds the vehicle speed V2 crossing the horizontal axis, the gain m takes a negative value. Become. That is, when the vehicle speed V is V1, the gain m takes a positive value, when the vehicle speed V is V2, the gain m becomes zero, and when the vehicle speed V becomes V3 higher than V2,
The gain m takes a negative value.

FIG. 42 shows the pan angle of the reflector 22 and the first ramp 2 when the vehicle speed V becomes V1, V2, V3.
It is a characteristic view which shows the relationship with the brightness of a. As shown in the figure, when the vehicle speed V is V1, the gain m is a positive value. Therefore, as the pan angle θp (i) of the reflector 22 increases, the brightness I (i) of the first lamp 2a increases. ) Works to increase. Further, when the vehicle speed V is V2, the gain m becomes zero.
Of the lamp 2a does not change.

Further, when the vehicle speed V becomes V3, the gain m becomes a negative value, so that the brightness of the first lamp 2a decreases as the pan angle θp (i) increases. I do. Thus, it is possible to control the suitable pan angle θp (i) and to control the brightness of the first lamp 2a in consideration of the traveling speed of the vehicle.

As described above, the reflector 22 of the second lamp 2b rotates left and right in accordance with the steering angle of the steering wheel, so that the light emitted by the reflector 22 of the second lamp 2b extends from the oncoming vehicle side to the sidewalk side. The horizontal light distribution rotates according to the steering angle of the steering wheel, increasing the visibility of the turning direction during turning, and the cut line on the sidewalk side is diagonally higher than the cut line on the side of the oncoming vehicle. Since the first lamp 2a for irradiating the light distribution has a fixed optical axis, the pedestrian-side cut line does not follow the preceding vehicle, so that the dazzling property for the driver driving the preceding vehicle is also low. The light distribution including the side cut line is improved over the conventional light distribution control lamp that rotates left and right.

Further, since the brightness of the first lamp 2a changes according to the pan angle θp (i) of the reflector 22 of the second lamp 2b, the light distribution emitted by the reflector 22 of the second lamp 2b Is a first ramp 2a in an area in a non-turning direction from the front of the vehicle, which moves in the turning direction and becomes dark.
Light distribution becomes brighter.

By adding the vehicle speed as a control parameter, a wide range can be illuminated in an area where the vehicle speed is low, so that the wide area can be visually recognized. Thus, the visibility in the turning direction is improved, so that an appropriate light distribution pattern can be formed in the speed range, thereby improving the visibility.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle lighting device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a vehicle to which the vehicle lighting device of the present invention is applied.

FIG. 3 is an explanatory diagram showing a detailed configuration of a headlamp.

FIG. 4 is an explanatory diagram showing a light distribution pattern of a first lamp and a light distribution pattern of a second lamp.

FIG. 5 is a side view showing a schematic configuration of a first lamp.

FIG. 6 is a characteristic diagram showing a relationship between an applied voltage and the brightness of a first lamp.

FIG. 7 is an explanatory diagram showing pulse-like voltage signals applied to a lamp when a high-intensity discharge lamp is used as a headlamp.

FIG. 8 is a characteristic diagram showing the relationship between the duty ratio of a pulse voltage applied to a high-intensity discharge lamp and the brightness of the lamp.

FIG. 9 is a side view showing a schematic configuration of a second lamp.

FIG. 10 is a plan view showing a schematic configuration of a second lamp.

FIG. 11 is an explanatory diagram showing a state when the second lamp rotates left and right.

FIG. 12 is an explanatory diagram showing a light distribution pattern of a second lamp with respect to a light distribution pattern of a first lamp;
When the light distribution pattern of the second lamp is on the right side, (b)
Indicates the case when the vehicle has come to the center, and FIG.

FIG. 13 is a flowchart illustrating a processing procedure of the vehicle lighting device according to the first embodiment and the second embodiment of the present invention.

FIG. 14 is a flowchart illustrating a detailed processing procedure of a process of determining a light distribution control amount.

FIG. 15 is a flowchart showing a procedure for calculating the pan angle of the reflector of the second lamp.

FIG. 16 is a characteristic diagram illustrating a relationship between a steering wheel angle and a pan angle.

FIG. 17 is a flowchart showing a procedure relating to a first process when determining the brightness of the first lamp based on the pan angle of the reflector of the second lamp.

FIG. 18 is a characteristic diagram illustrating a relationship between a pan angle obtained by a first process and brightness of a first lamp.

FIG. 19 is a flowchart illustrating a procedure for a second process when determining the brightness of the first lamp based on the pan angle of the reflector of the second lamp.

FIG. 20 is a characteristic diagram illustrating a relationship between a pan angle obtained by a second process and brightness of a first lamp.

FIG. 21 is a flowchart illustrating a procedure relating to a third process when determining the brightness of the first lamp based on the pan angle of the reflector of the second lamp.

FIG. 22 is a characteristic diagram showing a relationship between a pan angle obtained by a third process and brightness of a first lamp.

FIG. 23 is a flowchart showing a procedure for a fourth process when determining the brightness of the first lamp based on the pan angle of the reflector of the second lamp.

FIG. 24 is a characteristic diagram illustrating a relationship between a pan angle obtained by a fourth process and brightness of a first lamp.

FIG. 25 is a flowchart showing a procedure relating to a fifth process when determining the brightness of the first lamp based on the pan angle of the reflector of the second lamp.

FIG. 26 is a characteristic diagram illustrating a relationship between a pan angle obtained by a fifth process and brightness of a first lamp.

FIG. 27 is a block diagram illustrating a configuration of a vehicle lighting device according to a second embodiment of the present invention.

FIG. 28 is a diagram showing a second example based on the vehicle speed and the steering angle of the steering wheel.
5 is a flowchart showing a procedure for obtaining a pan angle of the reflector of the lamp of FIG.

FIG. 29 is a characteristic diagram illustrating a relationship between a traveling speed of a vehicle and a gain when a pan angle is obtained.

FIG. 30 is an explanatory diagram showing a driver's visual recognition position when the vehicle passes through a curve during high-speed running.

FIG. 31 is a flowchart illustrating a first processing procedure when determining the brightness of a first lamp based on a vehicle speed and a pan angle.

FIG. 32 is a characteristic diagram illustrating a relationship between a vehicle speed V and a gain m according to a first process.

FIG. 33 is a flowchart showing a second processing procedure when determining the brightness of the first lamp based on the vehicle speed and the pan angle.

FIG. 34 is a characteristic diagram illustrating a relationship between a vehicle speed V and a gain m according to a second process.

FIG. 35 is a flowchart illustrating a third processing procedure when determining the brightness of the first lamp based on the vehicle speed and the pan angle.

FIG. 36 is a characteristic diagram showing a relationship between a vehicle speed V and a gain m according to a third process.

FIG. 37 is a flowchart illustrating a fourth processing procedure when determining the brightness of the first lamp based on the vehicle speed and the pan angle.

FIG. 38 is a characteristic diagram illustrating a relationship between a vehicle speed V and a gain m according to a fourth process.

FIG. 39 is a flowchart showing a fifth processing procedure when determining the brightness of the first lamp based on the vehicle speed and the pan angle.

FIG. 40 is a characteristic diagram illustrating a relationship between a vehicle speed V and a gain m according to a fifth process.

FIG. 41 is an explanatory diagram showing a case where the gain m becomes a positive value, zero, or a negative value with respect to a change in the vehicle speed V.

FIG. 42 is a characteristic diagram showing a relationship between a pan angle and lamp brightness when the gain m is a positive value, zero, or a negative value, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 10 Vehicle lighting device 2 Head lamp 2a First lamp 2b Second lamp 2c Vehicle width lamp 3 Drive unit 4 Control unit 5 Steering angle detection unit 6 Microcomputer 7 Vehicle speed detection unit 11 Base 12 Reflector 13 Light source 14 Shade Reference Signs List 15 dimming circuit 21 base 22 reflector 23 light source 24 shade 25 base 26 rotation axis 27 gear 28 gear 29 deflection motor P1 light distribution pattern of first lamp P2 light distribution pattern of second lamp

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatejo Umezaki F-term in Nissan Motor Co., Ltd. 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture (Reference) 3K039 AA08 CC01 DC02 FD01 FD05 FD12 GA02 HA03 JA03

Claims (8)

[Claims] 1. A vehicular lighting device comprising a headlight mounted on a front portion of a vehicle, an optical axis of which is rotatable in a left-right direction, and a brightness of which can be changed. Steering angle detecting means for detecting a steering angle; and control for calculating a deflection angle of an optical axis of the headlight and brightness of the headlight based on the steering angle detected by the steering angle detecting means. Means, and drive means for performing a process of adjusting the optical axis and brightness of the headlight based on the calculation data by the control means, wherein the control means is configured to control when the vehicle is in a steering neutral state. When the optical axis faces the front of the vehicle and is steered left and right, the optical axis is controlled to rotate in the steering direction, and when the optical axis is turned left and right, a non-turn side from the front of the vehicle is controlled. The brightness of the headlight is adjusted so that the amount of light applied to the Vehicle lighting device characterized by Gosuru. 2. A vehicle speed detecting means for detecting a running speed of the vehicle, wherein the control means detects a vehicle speed detected by the vehicle speed detecting means and a steering angle detected by the steering angle detecting means. The vehicle lighting device according to claim 1, wherein a deflection angle of an optical axis of the headlight is calculated based on the angle. 3. A vehicle speed detecting means for detecting a running speed of the vehicle, wherein the control means is configured to detect a vehicle speed based on a vehicle speed detected by the vehicle speed detecting means and a steering angle detected by the steering angle detecting means. hand,
Calculate the dimming light amount of the headlight, and irradiate the area on the non-turning side from the front of the vehicle when the detected vehicle speed is higher, when the deflection angle of the optical axis changes with the steering of the vehicle. The vehicle lighting device according to claim 1, wherein the light amount is controlled to be darker than when steering is neutral. 4. The headlight has a first light distribution having a cut line on the sidewalk side higher than the oncoming lane side of the vehicle, and a first light distribution having a horizontal cutline from the oncoming lane side to the sidewalk side. And a second light distribution is superimposed to form one light distribution pattern, and the control unit is capable of adjusting the brightness of the first light distribution and rotating the second light distribution in the left-right direction. When the steering is neutral, the optical axes of the first light distribution and the second light distribution are directed toward the front side of the vehicle.
The optical axis of the light distribution is rotated left and right according to the steering amount, and the brightness of the first light distribution is stepwise or steplessly changed according to the rotation amount of the second light distribution. The vehicle lighting device according to any one of claims 1 to 3, wherein the vehicle lighting device is controlled to increase the brightness. 5. The control means according to claim 1, further comprising: a gain for setting a deflection amount of the optical axis of the second light distribution with respect to the steering angle in accordance with an increase in the vehicle speed detected by the vehicle speed detection means. The vehicle lighting device according to claim 4, wherein the vehicle lighting device is controlled to reduce the amount. 6. The controller according to claim 1, wherein the controller adjusts the amount of light control of the first light distribution with respect to the amount of deflection of the optical axis of the second light distribution in accordance with an increase in the vehicle speed detected by the vehicle speed detector. 5. The control according to claim 4, wherein the control is performed so as to reduce a gain when the setting is performed.
4. The vehicle lighting device according to claim 1. 7. The control means sets a threshold value of the vehicle speed detected by the vehicle speed detection means, and when the vehicle speed becomes higher than the threshold value, the brightness of the first light distribution is reduced. 7. The vehicle lighting device according to claim 6, wherein control is performed to darken stepwise or steplessly according to the amount of rotation of the second light distribution. 8. The headlight according to claim 1, wherein the headlight includes at least one first lamp constituting the first light distribution and at least one second lamp constituting the second light distribution. The vehicle lighting device according to any one of claims 4 to 7, wherein: