JPH10315844A - Light control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To light up a vehicle light properly in compliance with the running situation of the vehicle. SOLUTION: A light control device for a vehicle senses the external illuminance of the vehicle using an illuminance sensor 7, and when the sensed value attains the reference illuminance value for actuating lighting-up, a light electronic control unit 9 allows a body electronic control unit 10 to light up a head lamp 2 in a timing delayed for a certain time. On the other hand, the car speed is sensed by a sensor 8, and if the obtained value is over the reference car speed value, the head lamp 2 is lighted up at a delayed timing set shorter than below the reference value when the lighting-up reference illuminance set higher than below the reference car speed is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle light control device for automatically turning on and off lights such as headlamps based on brightness outside the vehicle.

[0002]

2. Description of the Related Art A light control device employed in a vehicle such as a passenger car compares the brightness (external illuminance) outside the vehicle with a reference illuminance set for turning on or off a headlamp and a tail lamp. The head lamp and the tail lamp are automatically turned on or off based on the comparison result.

[0003] In such a light control device, the lighting reference illuminance when turning on the headlamp is set to be lower than the turning-off reference illuminance when turning off the headlamp. This is to ensure that the external illuminance does not easily reach the lighting reference illuminance even when the vehicle is traveling in a slightly dark place such as under a bridge in the daytime, so that the headlamp is not turned on unnecessarily, and that the illumination is turned off at night. This is to prevent the headlamp from being inadvertently turned off by preventing the external illuminance from easily reaching the turn-off reference illuminance even when traveling in a slightly bright place such as a side.

However, even when the lighting reference illuminance is set lower than the lighting reference illuminance, the external illuminance is lower than the lighting reference illuminance when the vehicle temporarily travels in a dark place such as under a bridge during daytime. The headlamp is turned on temporarily when the temperature is lowered. In order to prevent the headlamp from being unnecessarily turned on even in such a case, a delay time is provided between the time when the external illuminance falls below the lighting reference illuminance and the time when the headlamp is turned on. Thus, even when the external illuminance temporarily falls below the lighting reference illuminance when the vehicle passes under a bridge or the like, the light is not turned on if the external illuminance again exceeds the lighting reference illuminance within the delay time. Similarly, even when the headlamp is turned off, by providing a delay time, even when the external illuminance temporarily exceeds the light-off reference illuminance when passing through a bright place such as the lighting side at night, the delay time is set within the delay time. The head lamp is prevented from being inadvertently turned off if the light intensity falls again below the light-off reference illuminance.

[0005]

However, if a delay time is provided between the time when the external illuminance reaches the lighting reference illuminance and the time when the headlamp is turned on, the headlamp is turned on during driving on the highway in the daytime. There was a problem that the headlamp did not light up quickly when entering a necessary tunnel. The same problem has also been encountered with tail lamps.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a vehicle light control device capable of appropriately turning on a light according to a running condition of a vehicle. It is in.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is an external illuminance detecting means for detecting an external illuminance of a vehicle, and the external illuminance turns on a light of the vehicle. A vehicle light control device comprising: an illuminance determining unit that determines whether a lighting reference illuminance has been reached; and a lighting control unit that performs control to turn on a light based on a determination result of the illuminance determining unit. And a reference illuminance setting means for setting the lighting reference illuminance higher as the vehicle speed is higher.

According to a second aspect of the present invention, there is provided an external illuminance detecting means for detecting an external illuminance of a vehicle, and an illuminance for determining whether the external illuminance has reached a lighting reference illuminance for lighting a vehicle light. Detecting a vehicle speed in a vehicle light control device including: a determination unit; and a lighting control unit configured to control to turn on a light at a time delayed by a delay time from the determination time based on a determination result of the illuminance determination unit. Vehicle speed detecting means; and delay time setting means for setting the delay time shorter as the vehicle speed increases.

According to a third aspect of the present invention, there is provided an external illuminance detecting means for detecting an external illuminance of a vehicle, and an illuminance for determining whether or not the external illuminance has reached a lighting reference illuminance for lighting a vehicle light. Detecting a vehicle speed in a vehicle light control device including: a determination unit; and a lighting control unit configured to control to turn on a light at a time delayed by a delay time from the determination time based on a determination result of the illuminance determination unit. A vehicle speed detecting means and a lighting condition setting means for setting the lighting reference illuminance higher as the vehicle speed is higher and setting the delay time shorter.

(Operation) According to the first aspect of the present invention,
External illuminance detection means detects external illuminance of the vehicle. The illuminance determination means determines whether or not the detected external illuminance has reached a lighting reference illuminance for lighting a vehicle light. The lighting control means performs control for lighting the light based on the determination result of the illuminance determining means. Vehicle speed detecting means detects the vehicle speed.
The reference illuminance setting means sets the lighting reference illuminance higher as the vehicle speed increases. Therefore, when the vehicle speed is high, the light is turned on even when the external illuminance is relatively high, and when the vehicle speed is low, the light is not turned on unless the external illuminance becomes lower than that.

According to the present invention, the external illuminance detecting means detects the external illuminance of the vehicle. The illuminance determination means determines whether or not the detected external illuminance has reached a lighting reference illuminance for lighting a vehicle light. Based on the result of the determination by the illuminance determining means, the lighting control means performs control to turn on the light at a time delayed by a delay time from the determination time. Vehicle speed detecting means detects the vehicle speed. The delay time setting means sets the delay time shorter as the vehicle speed increases. Therefore, when the vehicle speed is high, the light is quickly turned on when the external illuminance reaches the lighting reference illuminance, and when the vehicle speed is low, the light is lit when the light is delayed even if the external illuminance reaches the lighting reference illuminance.

According to the third aspect of the invention, the external illuminance detecting means detects the external illuminance of the vehicle. The illuminance determination means determines whether or not the detected external illuminance has reached a lighting reference illuminance for lighting a vehicle light. Based on the result of the determination by the illuminance determining means, the lighting control means performs control to turn on the light at a time delayed by a delay time from the determination time. Vehicle speed detecting means detects the vehicle speed. The lighting condition setting means sets the lighting reference illuminance higher as the vehicle speed increases, and sets the delay time shorter. Therefore, when the vehicle speed is high, the light is turned on even when the external illuminance is relatively high, and when the vehicle speed is low, the light is not turned on unless the external illuminance becomes lower than that. When the vehicle speed is high, the light is turned on quickly when the external illuminance reaches the lighting reference illuminance, and when the vehicle speed is low, the light is turned on when the light is delayed even if the external illuminance reaches the lighting reference illuminance.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a configuration of a light system 1 provided in a vehicle. The light system 1 is a device for turning on or off the head lamp 2 and the tail lamp 3 manually or automatically, and includes a head lamp 2 as a light, a tail lamp 3 as a light, an ignition switch 4, a light switch 5, and a light control device 6. It consists of. The light control device 6 includes an illuminance sensor 7 as external illuminance detection means, a vehicle speed sensor 8 as vehicle speed detection means, a light electronic control unit (hereinafter, light ECU) 9, and a body electronic control unit (hereinafter, body ECU) 10. ing.

The light switch 5 has an off position, a tail lamp on position, a tail and head lamp on position, and
An automatic position is provided, and switching between the off position and the automatic position can be performed in this order.
The automatic position is a switching position for causing the light control device 6 to automatically turn on and off the head lamp 2 and the tail lamp 3. The illuminance sensor 7 is a sensor for detecting external illuminance of the vehicle, and is provided on a dashboard.

The light ECU 9 is provided, for example, in a dashboard. The ignition switch 4, the light switch 5, and the illuminance sensor 7 are connected to the light ECU 9.

The vehicle speed sensor 8 is provided in a transmission (not shown). The body ECU 10 is provided, for example, in the right cowl side portion. Body ECU
The vehicle speed sensor 8 is connected to 10. The head lamp 2 and the tail lamp 3 are connected to the body ECU 10.

The light ECU 9 and the body ECU 10
They are connected by a communication line 11. The body ECU 10 includes a computer, and also constitutes a power window system, a vehicle speed-sensitive automatic door lock system, a wireless door lock remote control system, and the like. For example, the body ECU 10 is connected to a power window electronic control unit via a communication line 11 and to a power window motor. And body E
The CU 10 controls the power window motor based on a signal from the power window switch. Body EC
The U10 is connected to the switch unit and the like of each system by the same communication line 11, and transmits a signal through the communication line 11 in a time-division multiplex system. Then, the actuators constituting each system are controlled. As a result, the required wire harness is shared for each system, and the number of wire harnesses used in the vehicle is reduced.

The light ECU 9 is provided with a computer for turning on or off the head lamp 2 and the tail lamp 3 by the body ECU 10 through the communication line 11 based on the operation of the light switch 5 in the light system 1.

The body ECU 10 outputs vehicle speed data based on the vehicle speed VX detected by the vehicle speed sensor 8 to the light ECU 9 via the communication line 11. When the ignition switch 4 is turned on, the light ECU 9 turns on the light switch 5.
2 or tail lamp 3 based on the signal from
A turn-on signal for turning on or a turn-off signal for turning off is output to the body ECU 10 via the communication line 11. When the light switch 5 is switched to the automatic position, the light ECU 9 controls the headlamp 2 based on signals from the illuminance sensor 7 and the vehicle speed sensor 8.
Alternatively, a lighting signal for lighting the tail lamp 3 or a light-off signal for turning off the tail lamp 3 is output to the body ECU 10 via the communication line 11. The body ECU 10 outputs or eliminates a drive current for turning on the head lamp 2 or the tail lamp 3 based on each signal.

Next, the electrical configuration of the light system 1 will be described in detail. The ignition switch 4 outputs an ON signal IG to the light ECU 9 in a state where the ignition switch 4 is switched to the ON position. The light switch 5 outputs the tail signal ST to the light ECU 9 when the light switch 5 is switched to the tail position, and outputs the tail signal ST and the head signal SH to the light ECU 9 when the light switch 5 is switched to the head position. The light switch 5 outputs an automatic signal SA to the light ECU 9 in a state where the light switch 5 is switched to the automatic position.

The illuminance sensor 7 detects the external illuminance LX of the vehicle, and outputs an illuminance signal SL composed of a voltage signal corresponding to the external illuminance LX. The illuminance sensor 7 is composed of, for example, a photodiode.

The vehicle speed sensor 8 outputs a pulse signal SP having a cycle corresponding to the vehicle speed VX. The write ECU 9 includes an A / D converter 20 and a microcomputer unit 21, as shown in FIG.

The A / D converter 20 converts the illuminance signal SL output from the illuminance sensor 7 into a digital value and outputs illuminance data D
L is output to the microcomputer section 21. The microcomputer unit 21 includes an input interface 22, a serial interface 2
3. Central processing unit (CPU) 24, read-only memory (ROM) 25, nonvolatile memory (EEPROM)
26, writable and readable memory (RAM) 2
7 and a timer 28. In the present embodiment, the microcomputer unit 21 includes an illuminance determination unit, a reference illuminance setting unit, a delay time setting unit, and a lighting condition setting unit.

The CPU 24 is connected to the input interface 22
ON signal I from the ignition switch 4 via
G, the tail signal ST, the head signal SH, and the auto signal SA from the light switch 5 are read. CPU 24
Is the body EC via the serial interface 23
The vehicle speed data DV output by U10 is read.

The EEPROM 26 stores a reference vehicle speed V0 for determining whether the vehicle is traveling on a highway or on a general road. This reference vehicle speed V0 is set to, for example, 80 km.

The EEPROM 26 has lighting reference illuminances L4 and L8 used as a reference for lighting the headlamp 2 based on the external illuminance LX of the vehicle, and is used as a reference for turning off the headlamp 2. The reference illuminances L3 and L7 are stored. EEPROM2
6 includes a tail lamp 3 based on the external illuminance LX of the vehicle.
The lighting reference illuminances L2 and L6 used as the reference for turning on the illuminated light and the turn-off reference illuminances L1 and L5 used as the reference for turning off the tail lamp 3 are stored.

The EEPROM 26 has an external illuminance LX.
Are delayed by a predetermined time after reaching the lighting reference illuminances L4 and L8, a delay time T4, T8 used to turn on the headlamp 2 and a predetermined time after reaching the light-off reference illuminance L3, L7. At this point, delay times T3 and T7 used to turn off the headlamp 2 are stored. In the EEPROM 26, when the external illuminance LX reaches the lighting reference illuminances L2 and L6 and is delayed by a predetermined time, the delay times T2 and T6 used to turn on the tail lamp 3 and the turn-off reference times L1 and L5 are reached. The delay times T1 and T5 used to turn off the tail lamp 3 at a point in time after a predetermined time have been stored.

Each lighting reference illuminance L2, L4, L6, L
8. Each of the light-off reference illuminances L1, L3, L5, L7 and the delay times T1 to T8 are EE in order to facilitate change for each vehicle type.
It is stored in the PROM 26.

The RAM 27 temporarily stores the operation result of the CPU 24. The timer 28 measures the delay times T1 to T8. The CPU 24 is a serial interface 2
A tail lighting signal TON for turning on the tail lamp 3 or a tail extinction signal TOF for turning off the tail lamp 3 is output to the body ECU 10 via the main body 3. Further, the CPU 24 outputs a head lighting signal HON for lighting the headlamp 2 or a head extinguishing signal HOF for extinguishing the headlamp 2.

The ROM 25 stores a control program for executing a write control process and a write automatic control process. The light control process is executed at predetermined intervals, and turns on the tail lamp 3 when the light switch 5 is switched to the tail position.
Is a control process for lighting the head lamp 2 and the tail lamp 3 when the head position is switched to the head position. The light control process is a control process for executing the light automatic control process when the light switch 5 is switched to the automatic position.

As a light control process, the CPU 24 determines that the light switch 5 has been switched to the tail position or the head position when the tail signal ST is input, and outputs the tail lighting signal TON to the body ECU 10.
Output to On the other hand, when the tail signal ST has disappeared, the CPU 24 determines that the light switch 5 has been switched to the off position or the automatic position, and outputs a tail extinguishing signal TOF to the body ECU 10.

As a write control process, the CPU 24
Determines that the light switch 5 has been switched to the head position when the head signal SH is being input, and outputs a head lighting signal HON to the body ECU 10. On the other hand, when the head signal SH disappears, the CPU 24 determines that the light switch 5 has been switched from the head position to the tail position or the automatic position, and outputs a head turn-off signal HOF to the body ECU 10.

As a write control process, the CPU 24
Determines that the light switch 5 has been switched to the automatic position when the auto signal SA is being input.
When the automatic signal SA is input, the CPU 24 repeatedly executes the automatic light control process at predetermined intervals.

The automatic light control process is for automatically turning on or off the head lamp 2 and the tail lamp 3 based on the external illuminance LX of the vehicle detected by the illuminance sensor 7 and the vehicle speed VX detected by the vehicle speed sensor 8. This is a control process.

FIG. 4 is a map showing the reference illumination levels L2, L4, L6, L8 and the reference illumination levels L1, L3, L5, L7 stored in the EEPROM 26. FIG. 4 shows the delay times T2, T4, T6, and T8 at the time of lighting stored in the EEPROM 26 and the delay time T at the time of lighting off.
It is a map showing 1, T3, T5, and T7.

As shown in the map, the lighting reference illuminances L4 and L8 of the headlamp 2 and the lighting reference illuminances L2 and L6 of the tail lamp 3 are set separately. Further, for the headlamp 2, a lighting reference illuminance L4 at a vehicle speed equal to or higher than the reference vehicle speed V0 and a lighting reference illuminance L8 at a vehicle speed less than the reference vehicle speed V0 are separately set. Similarly, for the tail lamp 3, a lighting reference illuminance L2 when the vehicle speed is equal to or higher than the reference vehicle speed V0 and a lighting reference illuminance L6 when the vehicle speed is lower than the reference vehicle speed V0 are separately set.

FIG. 5A shows the lighting reference illuminances L2 and L
4, L6, L8 and each light-off reference value illuminance L1, L3, L
5 is a graph for comparing the height of L7. As shown in the graph, the lighting reference illuminance L2 of the tail lamp 3 at a vehicle speed equal to or higher than the reference vehicle speed V0 is set higher than the lighting reference illuminance L4 of the headlamp 2. At the same vehicle speed, the reference illuminance L3 for turning off the headlamp 2 is set higher than the reference illuminance L2 for lighting the tail lamp 3. In addition, the extinction reference illuminance L1 of the tail lamp 3 at the same vehicle speed is set higher than the extinction reference illuminance L3 of the headlamp 2. This is because it is not necessary to turn on the headlamp 2, but the tail lamp 3 is turned on early in a dim state to enhance safety. Similarly, the vehicle speed VX
Is lower than the reference vehicle speed V0, the reference illuminance L5 for turning on or off the tail lamp 3 and the headlamp 2 is also used.
The same magnitude relationship as when the vehicle speed VX is equal to or higher than the reference vehicle speed V0 is set to L8.

As shown in FIG. 5A, when the vehicle speed VX is equal to or higher than the reference vehicle speed V0, the vehicle speed VX is also changed to the reference vehicle speed V0.
Also when it is less than the above, the lighting reference illuminance L4 (L8) when the headlamp 2 is turned on is set to a value lower than the light-off reference illuminance L3 (L7) when the headlamp 2 is turned off. This is to prevent unnecessary turning on of the unlit headlamp 2 when the vehicle passes through a dark place such as under a bridge during the daytime and the external illuminance LX temporarily decreases. Further, when the vehicle passes the side of the lighting or the like at night and the external illuminance LX is temporarily increased, the lit head lamp 2 is prevented from being inadvertently turned off. Similarly, the lighting reference illuminance L2 (L
6) is set lower than the light-off reference illuminance L1 (L5).

Further, in the present invention, the lighting reference illuminance L4 of the headlamp 2 when the vehicle speed VX is equal to or higher than the reference vehicle speed V0 is the lighting reference illuminance L8 when the vehicle speed VX is lower than the reference vehicle speed V0.
And the light-off reference illuminance L3 is also set higher than the light-off reference illuminance L7. Similarly, when the vehicle speed VX is equal to or higher than the reference vehicle speed V0, the lighting reference illuminance L2 of the tail lamp 3 is set to be higher than the lighting reference illuminance L6 when the vehicle speed VX is lower than the reference vehicle speed V0. Is set higher.

When a vehicle enters a tunnel while traveling on a highway, the headlights 2 and the taillights 3 are turned on even when the external illuminance LX does not become sufficiently low, and the vehicle is driven under a bridge while traveling on a general road. This is to prevent the head lamp 2 and the tail lamp 3 from being unnecessarily turned on when the vehicle temporarily passes through a dark place such as.

When the vehicle speed VX is higher than the reference vehicle speed V0 and when the vehicle speed VX is lower than the reference vehicle speed V0, the headlamp 2 is actually turned on when the external illuminance LX reaches the lighting reference illuminance L4 (L8). Before the delay time T4 (T
8) is provided. This is to prevent the headlamp 2 from turning on unnecessarily when the vehicle passes through a dark place such as under a bridge and the external illuminance LX temporarily falls below the lighting reference illuminance L4 (L8) in the daytime. is there. When the vehicle speed VX is equal to or higher than the reference vehicle speed V0 and when the vehicle speed VX is lower than the reference vehicle speed V0, a delay time T3 from when the external illuminance LX reaches the reference illuminance L3 (L7) to when the headlamp 2 is extinguished.
(T7) is provided because the headlamp 2 is inadvertent when the vehicle passes through a bright place such as the side of a light at night and the external illuminance LX temporarily exceeds the light-off reference illuminance L3 (L7). This is to prevent the light from being turned off.

Similarly, when the vehicle speed VX is higher than the reference vehicle speed V0 and when the vehicle speed VX is lower than the reference vehicle speed V0, the tail lamp 3 has a delay time T2 until the tail lamp 3 is actually turned on. (T6)
Is provided. Further, a delay time T1 (T5) is provided between when the vehicle speed VX is equal to or higher than the reference vehicle speed V0 and when the vehicle speed is lower than the reference vehicle speed V0 until the tail lamp 3 is actually turned off.

Further, in the present invention, as shown in FIG. 5B, when the headlamp 2 is turned on, the delay time T4 when the vehicle speed is equal to or higher than the reference vehicle speed V0 is shorter than the delay time T8 when the vehicle speed is lower than the reference vehicle speed V0. Is set shorter. When the headlamp 2 is turned off, a delay time T3 at a vehicle speed higher than the reference vehicle speed V0 is set shorter than a delay time T7 at a vehicle speed lower than the reference vehicle speed V0.

This is because when the vehicle enters a tunnel while traveling on a highway, the headlamp 2 is quickly turned on when the external illuminance LX reaches the lighting reference illuminance L4, and when the vehicle is traveling on a general road, the lower part of the bridge or the like is used. This is to prevent the headlamp 2 from being quickly turned on even when the external illuminance LX reaches the lighting reference illuminance L8 when the vehicle temporarily passes through a dark place, thereby preventing unnecessary lighting.

As a light automatic control process, the CPU 24
Determines whether the detected vehicle speed VX is equal to or higher than a preset reference vehicle speed V0. When the vehicle speed VX is equal to or higher than the reference vehicle speed V0, the CPU 24 determines that the vehicle is traveling on a highway. If the state in which the external illuminance LX is less than the lighting reference illuminance L2 continues for the delay time T2 or more in this state, the CPU 24 determines that the vehicle has entered a dim place such as under a bridge while traveling on the highway, and outputs a tail lighting signal. T
ON is output to the body ECU 10. Further, the CPU 24
If the external illuminance LX is lower than the lighting reference illuminance L4 for more than the delay time T4, it is determined that the vehicle has entered the tunnel while traveling on the highway, and the head lighting signal HON
Is output to the body ECU 10.

The CPU 24 performs automatic light control processing.
Means that when the vehicle speed VX is equal to or higher than the reference vehicle speed V0, the external illuminance L
When X exceeds the light-off reference illuminance L3 for more than the delay time T3, it is determined that the vehicle has exited the tunnel while traveling on the highway, and the head-off signal HOF is output to the body ECU 10 to turn off the headlamp 2. Output to
Further, the CPU 24 sets the external illuminance LX to the light-off reference illuminance L
When the value exceeds 1 continues for the delay time T1 or more, it is determined that the vehicle has gone out of a dark case such as under a bridge while traveling on the highway, and the tail light-off signal TOF and the head light-off signal HOF
Is output to the body ECU 10.

Also, as the automatic light control processing, the CPU 2
When the vehicle speed VX is lower than the reference vehicle speed V0, it is determined that the vehicle is traveling on a general road. In this state, when the state where the external illuminance LX is lower than the lighting reference illuminance L6 continues for the delay time T6 or more, the CPU 24 determines that the vehicle has entered a dim place such as under a bridge while traveling on a general road,
The tail lighting signal TON is output to the body ECU 10. Further, the CPU 24 sets the external illuminance LX to the lighting reference illuminance L8.
If the vehicle speed falls below the delay time T8 or longer, it is determined that the vehicle has entered a tunnel while traveling on a general road, and a head lighting signal HON is output to the body ECU 10.

As a light automatic control process, the CPU 24
Means that when the vehicle speed VX is lower than the reference vehicle speed V0, the external illuminance L
When the state where X exceeds the light-off reference illuminance L7 continues for the delay time T7 or more, it is determined that the vehicle has left the tunnel while traveling on the general road, and the head-off signal HOF is output to the body ECU 10 to turn off the headlamp 2. Output to Further, when the external illuminance LX exceeds the light-off reference illuminance L5 for more than the delay time T5, the CPU 24 determines that the vehicle has exited a dim place such as under a bridge while traveling on a general road, and the tail light-off signal TOF And a head turn-off signal HOF is output to the body ECU 10.

Next, the configuration of the body ECU 10 will be described in detail. As shown in FIG. 3, the body ECU 10 includes a microcomputer unit 30 and a drive circuit 31. Microcomputer section 30
A serial interface 32, an input interface 33, a central processing unit (CPU) 34, a read-only memory (ROM) 35, a writable and readable memory (RAM) 36, and an output interface 37
It has. In the present embodiment, the microcomputer unit 21 and the microcomputer unit 30 constitute a lighting control unit.

The CPU 34 receives a tail light signal TON from the lamp ECU 9 via the serial interface 32,
The tail OFF signal TOF, the head ON signal HON, and the head OFF signal HOF are read. The CPU 34 also receives a pulse signal S from the vehicle speed sensor 7 through the input interface 33.
Enter P.

The RAM 36 temporarily stores the calculation result of the CPU 34. The CPU 34 calculates the vehicle speed VX from the pulse signal SP and outputs the vehicle speed data DV to the lamp ECU 9 via the serial interface 32. Also, CP
U34 outputs a tail lighting command signal TD for lighting the tail lamp 3 to the drive circuit 31 via the output interface 37. The CPU 34 outputs a head lighting command signal HD for lighting the head lamp 2 to the driving circuit 31 via the output interface 37.

The ROM 35 stores a control program for executing the write driving process. The light driving process is performed by a tail lighting signal T input from the light ECU 9.
This is a control process for turning on or off the tail lamp 3 based on the ON and tail extinguishing signal TOF and turning on or off the head lamp 2 based on the head lighting signal HON and the head extinguishing signal HOF. This write drive process is repeatedly executed at a predetermined cycle.

As the light drive processing, when the tail light signal TON is input, the CPU 34 determines whether the tail light signal TON is being output in the light control processing or the tail light signal TON in the automatic light control processing. Is output, and a tail lighting command signal TD is output to the drive circuit 31. At this time, the CPU 34 outputs the tail lighting command signal TD until the tail lighting signal TON disappears and a new tail extinction signal TOF is inputted, and when the tail extinction signal TOF is inputted, the CPU 34 outputs the tail lighting command signal TD. Stop output.

As a write drive process, the CPU 34
Determines that when the head lighting signal HON is input, the head lighting signal HON is output in the light control processing, or the head lighting signal HON is output in the light automatic control processing. And
The head lighting command signal HD is output to the drive circuit 31. At this time, the CPU 34 outputs the head-on command signal HD until the head-on signal HON disappears and a new head-off signal HOF is input, and the CPU 34 outputs the head-on command signal HD when the head-off signal HOF is input. Stop output.

The drive circuit 31 supplies a tail lighting command signal TD
The drive current is supplied to the tail lamp 3 only during the input of. The drive circuit 31 supplies a drive current to the headlamp 2 only while the head lighting command signal HD is being input.

Next, the operation of the light system 1 configured as described above will be described. When the ignition switch 4 is turned on, the microcomputer 21 of the light ECU 9 and the microcomputer 30 of the body ECU 10 are activated. The CPU 24 of the microcomputer section 21 repeatedly executes the write control process.

In the write control process, the CPU 24
When the tail signal ST is input from the light switch 5, a tail lighting signal TON is output to the body ECU 10, and when the tail signal ST disappears, a tail extinction signal TOF is output.
Further, the CPU 24 outputs the head signal S from the light switch 5.
When H is input, a head-on command signal HON is output to the body ECU 10, and when the head signal SH disappears, a head-off signal HOF is output.

On the other hand, the microcomputer section 34 of the body ECU 10
Repeatedly executes the write driving process shown in the flowchart of FIG. In the write driving process, the CPU 34
In step S400, it is determined whether or not the tail lighting signal TON is input. When the tail lighting signal TON is input, the tail lighting command signal TD is output to the drive circuit 31 to turn on the tail lamp 3 in step S410. After that, S420 is executed.

If the tail lighting signal TON has not been input in S400, the CPU 34 determines whether or not the tail extinction signal TOF has been input in S430. CP
When the tail extinguishing signal TOF is input in S430, the U34 stops the output of the tail lighting instruction signal TD to the drive circuit 31 in S440, and ends the light driving process. If the tail extinguishing signal TOF has not been input in S430, the CPU 34 terminates the process.

In S420, the CPU 34 determines whether or not the head lighting signal HON has been input. CPU34
In S420, when the head lighting signal HON is input, the process ends in S450 in which the head lighting command signal HD is output to the drive circuit 31 to light the head lamp 2 in S450.

If the head lighting signal HON has not been input in S420, the CPU 34 determines in S460 whether the head extinguishing signal HOF has been input. C
When the head extinguishing signal HOF is input in S460, the PU 34 stops the output of the head lighting instruction signal HD to the drive circuit 31 in S470, and ends the processing. If the head extinguishing signal HOF has not been input in S460, the CPU 34 terminates the process.

Therefore, when the light switch 5 is switched from the off position to the tail position, the tail lamp 3 is turned on. When the light switch 5 is switched from the tail position to the head position, the tail lamp 3 and the head lamp 2 are turned on. When the light switch 5 is switched from the head position to the tail position, only the head lamp 2 is turned off, and when the light switch 5 is switched from the tail position to the off position, the tail lamp 3 is also turned off.

When the light switch 5 is switched to the automatic position, the microcomputer 21 of the light ECU 9 operates as shown in FIGS.
The light automatic control process shown in the flowchart of FIG. 9 is repeatedly executed at a predetermined cycle.

In the automatic light control process, the CPU 24
Is the vehicle speed VX and the external illuminance LX at that time in S100.
Read. Next, in S110, the CPU 24 determines the vehicle speed VX.
Is higher than or equal to the reference vehicle speed V0. CPU2
4, when the vehicle speed VX is equal to or higher than the reference vehicle speed V0,
In S120, the read external illuminance Lx is the lighting reference illuminance L
It is determined whether it is less than 2. When the external illuminance Lx is less than the lighting reference illuminance L2 in S120, the CPU determines in S130 whether the external illuminance Lx is less than the lighting reference illuminance L4. When the external illuminance Lx is not less than the lighting reference illuminance L4 in S130, the CPU 24 determines whether or not the elapsed time t2 from when the external illuminance Lx becomes less than the lighting reference illuminance L2 is equal to or longer than the delay time T2 in S140. I do. When the elapsed time t2 has not reached the delay time T2 in S140, the CPU 24 ends the process.

On the other hand, when the elapsed time t2 from when the external illuminance Lx becomes less than the lighting reference illuminance L2 becomes equal to or longer than the delay time T2 in S140, the CPU 24 outputs a tail lighting signal TON in S150 and outputs a light automatic signal. The control processing ends.

Therefore, when the vehicle speed VX is equal to or higher than the reference vehicle speed V0, if the state where the external illuminance Lx of the vehicle is lower than the lighting reference illuminance L2 set higher than the lighting reference illuminance L6 continues for the delay time T2 or more, the tail lamp 3 is activated. Light.

The CPU 24 determines in step S130 that the external illuminance L
If x is less than the lighting reference illuminance L4, S160
Execute The CPU 24 determines in step S160 that the external illuminance Lx
It is determined whether or not the elapsed time t4 from when the lighting reference illuminance is less than the lighting reference illuminance L4 is equal to or longer than the delay time T4. The CPU
If the elapsed time t4 has not reached the delay time T4 in S160, the process ends.

The CPU 24 determines in step S160 that the external illuminance Lx
If the elapsed time t4 after the time becomes less than the lighting reference illuminance L4 becomes equal to or longer than the delay time T4, the tail lighting signal TON and the head lighting signal HON are output in S170, and the process is terminated.

Accordingly, when the vehicle speed VX is equal to or higher than the reference vehicle speed V0, if the state where the external illuminance Lx of the vehicle is lower than the lighting reference illuminance L4 set higher than the lighting reference illuminance L8 continues for the delay time T4 or longer, the tail lamp 3 and the head The lamp 2 lights up.

If the external illuminance Lx is equal to or greater than the lighting reference illuminance L2 in S120, the CPU 24 proceeds to S18.
Execute 0. The CPU 24 determines in step S180 that the external illuminance L
It is determined whether or not x exceeds the light-off reference illuminance L3.
When the external illuminance Lx has exceeded the turn-off reference illuminance L3, the CPU 24 determines in S190 whether the external illuminance Lx has exceeded the turn-off reference illuminance L1. CPU 24
When the external illuminance Lx does not exceed the light-off reference illuminance L1 in S190, the elapsed time t3 after the external illuminance Lx exceeds the light-off reference illuminance L3 in S200 is the delay time T
It is determined whether or not 3 or more. The CPU 24 executes S2
If the elapsed time t3 has not reached the delay time T3 at 00, the process ends.

On the other hand, the CPU 24 determines in step S200 that the time t3 has elapsed since the external illuminance Lx exceeded the light-off reference illuminance L3.
Is longer than the delay time T3, the tail off signal TOF is output in S210, and the automatic light control process ends.

Therefore, when the vehicle speed VX is equal to or higher than the reference vehicle speed V0, the tail lamp 3 is turned off when the external illuminance Lx of the vehicle exceeds the light-off reference illuminance L3 set higher than the light-off reference illuminance L7 for a delay time T3 or more. I do.

The CPU 24 determines in step S190 that the external illuminance L
When x exceeds the light-off reference illuminance L1, S220 is executed. In S220, the CPU 24 determines whether or not the elapsed time t1 after the external illuminance Lx exceeds the light-off reference illuminance L1 is equal to or longer than the delay time T1. The CPU 24 executes S2
If the elapsed time t1 has not reached the delay time T1 at 20, the process is terminated.

The CPU 24 determines in step S220 that the external illuminance Lx
When the elapsed time t1 after the time exceeds the light-off reference illuminance L1 is equal to or longer than the delay time T1, a tail lighting signal TON and a head lighting signal HON are output in S230, and the process is terminated.

Therefore, when the vehicle speed VX is equal to or higher than the reference vehicle speed V0, if the state where the external illuminance Lx of the vehicle exceeds the light-off reference illuminance L1 set higher than the light-off reference illuminance L5 continues for the delay time T1 or more, the tail lamp 3 and the head Lamp 2 goes out.

If the external illuminance LX does not exceed the light-off reference illuminance L3 in S180, the CPU 24 terminates the process. If the vehicle speed VX is lower than the reference vehicle speed V0 in S110, the CPU 24 proceeds to S240.
Execute In S240, the CPU 24 determines whether the read external illuminance Lx is less than the lighting reference illuminance L6. When the external illuminance Lx is less than the lighting reference illuminance L6 in S240, the CPU 24 determines in S250 whether the external illuminance Lx is less than the lighting reference illuminance L8. When the external illuminance Lx is not less than the lighting reference illuminance L8 in S250, the CPU 24 determines the elapsed time t since the external illuminance Lx becomes less than the lighting reference illuminance L6 in S260.
6 is determined to be equal to or longer than the delay time T6. CP
U24 ends the process when the elapsed time t6 has not reached the delay time T6 in S260.

On the other hand, if the elapsed time t6 from when the external illuminance Lx becomes less than the lighting reference illuminance L6 becomes longer than the delay time T6 in S260, the CPU 24 outputs a tail lighting signal TON in S270 and outputs a light automatic light. The control processing ends.

Accordingly, when the vehicle speed VX is lower than the reference vehicle speed V0, if the state where the external illuminance Lx of the vehicle is lower than the lighting reference illuminance L6 set lower than the lighting reference illuminance L2 continues for the delay time T6 or more, the tail lamp 3 is turned on. Light.

The CPU 24 determines in step S250 that the external illuminance L
If x is less than the lighting reference illuminance L8, S280
Execute The CPU 24 determines in step S280 that the external illuminance Lx
It is determined whether or not the elapsed time t8 from when the lighting reference illuminance is less than the lighting reference illuminance L8 is equal to or longer than the delay time T8. CPU 24
Ends the process if the elapsed time t8 has not reached the delay time T8 in S280.

The CPU 24 determines in step S280 that the external illuminance Lx
When the elapsed time t8 after the time becomes less than the lighting reference illuminance L8 becomes equal to or longer than the delay time T8, the tail lighting signal TON and the head lighting signal HON are output in S290, and the process is terminated.

Accordingly, when the vehicle speed VX is lower than the reference vehicle speed V0, if the state where the external illuminance Lx of the vehicle is lower than the lighting reference illuminance L8 set lower than the lighting reference illuminance L4 continues for the delay time T8 or more, the tail lamp 3 and The head lamp 2 is turned on.

If the external illuminance Lx is equal to or greater than the lighting reference illuminance L6 in S240, the CPU 24 proceeds to S30.
Execute 0. The CPU 24 determines in step S300 that the external illuminance L
It is determined whether or not x exceeds the light-off reference illuminance L7.
When the external illuminance Lx has exceeded the light-off reference illuminance L7, the CPU 24 determines in S310 whether the external illuminance Lx has exceeded the light-off reference illuminance L5. The CPU
If the external illuminance Lx has not exceeded the light-off reference illuminance L5 in S310, it is determined in S320 whether the elapsed time t7 since the external illuminance Lx exceeded the light-off reference illuminance L7 was equal to or longer than the delay time T7. The CPU 24 proceeds to S320
If the elapsed time t7 has not reached the delay time T7, the process ends.

On the other hand, the CPU 24 determines in S320 that the time t7 has elapsed since the external illuminance Lx exceeded the light-off reference illuminance L7.
Is longer than the delay time T7, the tail off signal TOF is output in S330, and the automatic light control process ends.

Therefore, when the vehicle speed VX is lower than the reference vehicle speed V0, the tail lamp 3 is turned off when the external illuminance Lx of the vehicle exceeds the light-off reference illuminance L7 set lower than the light-off reference illuminance L3 for a delay time T7 or more. I do.

When the external illuminance Lx exceeds the light-off reference illuminance L5 in S310, the CPU executes S340. In S340, the CPU 24 sets the elapsed time t5 after the external illuminance Lx exceeds the light-off reference illuminance L5 to the delay time T5.
It is determined whether or not this is the case. The CPU 24 determines in S340
If the elapsed time t5 has not reached the delay time T5, the process ends.

In S340, the CPU 24 determines whether the external illuminance Lx
When the elapsed time t5 after the time exceeds the light-off reference illuminance L5 becomes equal to or longer than the delay time T5, a tail light-off signal TOF and a head light-off signal HOF are output in S350, and the process is terminated.

Therefore, when the vehicle speed VX is lower than the reference vehicle speed V0, if the state where the external illuminance Lx of the vehicle exceeds the light-off reference illuminance L5 set lower than the light-off reference illuminance L1 continues for the delay time T5 or more, the tail lamp 3 and the head Lamp 2 goes out.

If the external illuminance LX has not exceeded the turn-off reference illuminance L7 in S300, the CPU 24 terminates the process. As described in detail above, according to the light system 1 of the present embodiment, the following effects can be obtained.

(A) In the headlamp 2, the vehicle speed V
The lighting reference illuminance L4 when X is equal to or higher than the reference vehicle speed V0 is set higher than the lighting reference illuminance L8 when X is lower than the reference vehicle speed V0. Therefore, when the vehicle speed VX is high, the headlamp 2 is turned on when the external illuminance Lx reaches the lighting reference illuminance L4 set at a relatively high level, and when the vehicle speed VX is low, the external illuminance Lx is set at a lower lighting illuminance. If L8 is not reached, the headlamp 2 will not light. As a result, when entering a tunnel while driving on a highway, the headlamp 2 can be quickly turned on, and
When the vehicle passes through a dark place such as under a bridge while traveling on a general road, the headlamp 2 can be prevented from being turned on unnecessarily.

(B) In the headlamp 2, the vehicle speed V
Lighting delay time T when X is greater than or equal to reference vehicle speed V0
4 is the delay time T at the time of lighting when the vehicle speed is lower than the reference vehicle speed V0.
It was set shorter than 8. Therefore, when the vehicle speed VX is high, when the external illuminance Lx reaches the lighting reference illuminance L4, the light is lit after a relatively short delay time T4 elapses. When the vehicle speed VX is low, the external illuminance Lx reaches the lighting reference illuminance L8. The light is not turned on unless a longer set delay time T8 elapses. As a result, the headlamp 2 can be quickly turned on when entering a tunnel while traveling on a highway, and the headlamp 2 is not used when passing through a dark place such as under a bridge while traveling on a general road. Can be turned off.

(C) In the headlamp 2, the lighting reference illuminance L4 at a vehicle speed equal to or higher than the reference vehicle speed V0 is changed to the reference vehicle speed V0.
The lighting reference illuminance L8 is set to be higher than the lighting reference illuminance L8 at a vehicle speed lower than the reference vehicle speed V0, and the delay time T4 at a vehicle speed higher than the reference vehicle speed V0 is set shorter than the delay time T8 at a vehicle speed lower than the reference vehicle speed V0. Therefore, when the vehicle speed VX is high, the headlamp 2 is turned on when the external illuminance Lx reaches the lighting reference illuminance L4 set at a relatively high level, and when the vehicle speed VX is low, the external illuminance Lx is set to a lower lighting illuminance. If L8 is not reached, the headlamp 2 will not light. When the vehicle speed VX is high, when the external illuminance Lx reaches the lighting reference illuminance L4, the light is lit after a relatively short delay time T4 elapses. The light is not turned on unless a longer set delay time T8 elapses. As a result, the headlamp 2 can be turned on more quickly when entering a tunnel while traveling on a highway, and when passing through a dark place such as under a bridge while traveling on a general road, the headlamp 2 is turned on. Unnecessary lighting can be effectively prevented.

(D) In the tail lamp 3, the lighting reference illuminance L2 at a vehicle speed equal to or higher than the reference vehicle speed V0 is changed to the reference vehicle speed V0.
The lighting reference illuminance L6 is set to be higher than the lighting reference illuminance L6 when the vehicle speed is lower than the reference vehicle speed V0, and the delay time T2 when the vehicle speed is equal to or higher than the reference vehicle speed V0 is set shorter than the delay time T6 when the vehicle speed is lower than the reference vehicle speed V0. Therefore, when the vehicle speed VX is high, the tail lamp 3 is turned on when the external illuminance Lx reaches the lighting reference illuminance L2 which is set relatively high, and when the vehicle speed VX is low, the external illuminance Lx is set to a lower lighting reference illuminance L6. , The tail lamp 3 does not turn on. When the vehicle speed VX is high, when the external illuminance LX reaches the lighting reference illuminance L2, the light is lit after a relatively short delay time T2 elapses. When the vehicle speed VX is low, the external illuminance LX reaches the lighting reference illuminance L6. The light is not turned on unless a longer set delay time T6 elapses. As a result, the tail lamp 3 can be turned on more quickly when entering a tunnel while traveling on an expressway, and the tail lamp 3 becomes useless when passing through a dark place such as under a bridge while traveling on a general road. Lighting can be effectively prevented.

The embodiment is not limited to the above, but may be modified as follows. (1) In the above embodiment, the lighting reference illuminance L4 of the headlamp 2 at a vehicle speed higher than the reference vehicle speed V0 is set higher than the lighting reference illuminance L8 at a vehicle speed lower than the reference vehicle speed V0, or the delay time T4 May be set to be shorter than the delay time T8. With any one of these configurations, the headlamp 2 can be appropriately turned on according to the running condition of the vehicle.

(2) Only the headlamp 2 is illuminated based on the vehicle speed VX based on the illumination reference illuminance L4, L8 and the delay time T4.
T8 may be controlled. With this configuration, the headlamp 2 can be appropriately turned on according to the traveling state of the vehicle.

(3) With respect to the headlamp 2, the lighting reference illuminance L4, L8 or the delay time T4, T8 is set in two regions of high speed and low speed, respectively, based on one reference vehicle speed V0. May be divided into three or more regions, and the lighting reference illuminance or the delay time may be set in each region. According to this configuration, for example, when the vehicle speed VX is low in the vehicle speed range running on a general road, unnecessary lighting of the headlamp 2 is prevented, and the vehicle speed VX
Is relatively high, the headlamp 2 can be quickly turned on.

A relational expression for calculating an appropriate lighting reference illuminance with respect to the vehicle speed VX at that time may be provided, and the relational expression may be calculated each time. Further, a relational expression for calculating an appropriate delay time with respect to the vehicle speed VX may be provided, and the calculation may be performed from the relational expression each time.

(4) The lighting reference illuminance of the headlamp 2 is set higher as the vehicle speed VX is higher, and the lighting reference illuminance at the vehicle speed VX is set higher as the external illuminance Lx at that time is higher. May be configured. According to such a configuration, the higher the external illuminance Lx is during traveling on a highway, the faster the headlamp 2 is turned on when entering a tunnel. As a result, the headlamp 2 can be turned on more quickly as the external illuminance Lx becomes higher and the driver's eyes take longer to adjust to darkness.

(5) The delay time for turning on the headlamp 2 is changed to be shorter as the vehicle speed VX is higher, and the delay time at the vehicle speed VX is further shortened as the external illuminance Lx is higher. It may be configured as follows. According to such a configuration, the higher the external illuminance Lx is during traveling on a highway, the faster the headlamp 2 is turned on when entering a tunnel. As a result, the headlamp 2 can be turned on more quickly as the external illuminance Lx becomes higher and the driver's eyes take longer to adjust to darkness.

(6) The tail ECU 3 does not turn on the tail lamp 3 and the head lamp 2 but the light ECU 9
The vehicle speed sensor 7 and each of the lamps 2 and 3 may be directly connected to control the lighting and extinguishing.

Further, the ignition switch 4, the light switch 5, and the illuminance sensor 7 may be directly connected to the body ECU 10 without providing the light ECU 9, and the body ECU 10 may perform the light control. In this configuration, since the light ECU 9 is unnecessary, the number of ECUs mounted on the vehicle is reduced.

(7) The headlamp 2 and the tail lamp 3 may be turned on or off by changing the lighting reference illuminance or the delay time according to the vehicle speed VX, and the position lamp may be turned on or off.

Further, the display illuminance of a speedometer, a tachometer, or the like may be switched when the headlamp 2 is turned on. Hereinafter, in addition to the technical idea described in the claims, the technical idea grasped from each of the above-described embodiments will be described together with its effects.

(1) In the vehicle light control device according to any one of claims 1 to 3, the light is a headlamp. According to such a configuration, the headlamp can be appropriately turned on according to the traveling state of the vehicle.

(2) In the above (1), the light is a tail lamp. According to such a configuration, the tail lamp can be appropriately turned on according to the traveling state of the vehicle.

(3) In the vehicle light control device according to claim 3, the lighting condition setting means determines whether the vehicle is traveling on a highway or on a general road based on the detected vehicle speed. Vehicle speed determining means (microcomputer unit 21) for determining whether there is a vehicle speed;
Lighting reference illuminance (L2, L4) and the first delay time (T
2, T4) and the second lighting reference illuminance (L6, L6) lower than the first lighting reference illuminance when traveling on a general road.
8) and a condition setting means (microcomputer unit 2) for setting a second delay time (T6, T8) longer than the first delay time.
1). According to such a configuration, the light can be quickly turned on when driving on a highway, and unnecessary turning on of the light can be prevented when driving on a general road.

In this specification, means and members according to the present invention are defined as follows. (1) The vehicles are not limited to passenger vehicles such as sedans and sports cars, but also include transportation vehicles such as buses and trucks, and industrial vehicles such as crane vehicles and aerial work vehicles.

[0107]

As described in detail above, according to the first to third aspects of the present invention, it is possible to appropriately turn on the light according to the running condition of the vehicle. For example, it is possible to quickly turn on a light when entering a tunnel while traveling on a highway, and to avoid unnecessary use of the light when passing through a dark place such as under a bridge while traveling on a general road.

According to the first aspect of the invention, the higher the vehicle speed, the higher the lighting reference illuminance is set. Therefore, when the vehicle speed is high, the light is turned on even at a high external illuminance, and when the vehicle speed is low, the external illuminance is illuminated. , The light will not turn on until it is lower.

According to the second aspect of the present invention, the shorter the delay time is set, the higher the vehicle speed is. Therefore, when the vehicle speed is high, the light is turned on quickly, and when the vehicle speed is low, the light is turned off. be able to.

According to the third aspect of the present invention, the first aspect is provided.
And both effects of claim 2 can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a light system.

FIG. 2 is an electric block diagram of the light electronic control unit.

FIG. 3 is an electric block diagram of a body electronic control unit.

FIG. 4 is a map showing reference illuminance and delay time when each lamp is turned on and off.

5A is a graph showing reference illuminance when turning on and off each lamp with respect to vehicle speed, and FIG. 5B is a graph showing delay time when turning on and off each lamp with respect to vehicle speed.

FIG. 6 is a flowchart of a light automatic control process.

FIG. 7 is a flowchart of a light automatic control process.

FIG. 8 is a flowchart of a light automatic control process.

FIG. 9 is a flowchart of a light automatic control process.

FIG. 10 is a flowchart of a write driving process.

[Explanation of symbols]

2 ... Head lamp as light, 3 ... Tail lamp as light, 7 ... Illuminance sensor as external illuminance detecting means, 8 ... Vehicle speed sensor as vehicle speed detecting means, 21 ... Illuminance determining means constituting lighting control means, reference illuminance Setting means,
Microcomputer section as delay time setting means and lighting condition setting means; 30 microcomputer section constituting lighting control means;
2, L4, L6, L8 ... lighting reference illuminance, LX ... external illuminance, T2, T4, T6, T8 ... delay time.

Claims (3)

[Claims] An external illuminance detection unit configured to detect an external illuminance of the vehicle; an illuminance determination unit configured to determine whether the external illuminance has reached a lighting reference illuminance for lighting a light of the vehicle; A vehicle light control device comprising: a lighting control unit configured to perform control for lighting a light based on a determination result of the unit; a vehicle speed detection unit configured to detect a vehicle speed; and the lighting reference illuminance is set to be higher as the vehicle speed is higher. A vehicle light control device comprising: 2. An external illuminance detecting means for detecting an external illuminance of the vehicle; an illuminance determining means for determining whether the external illuminance has reached a lighting reference illuminance for lighting a light of the vehicle; A vehicle speed control means for detecting a vehicle speed based on a determination result of the means, the lighting control means for controlling lighting of the light at a time delayed by a delay time from the determination time; A vehicle light control device comprising: a delay time setting unit configured to set the time shorter as the vehicle speed increases. 3. An external illuminance detecting means for detecting an external illuminance of the vehicle; an illuminance determining means for determining whether or not the external illuminance has reached a lighting reference illuminance for lighting a light of the vehicle; A vehicle speed control means for detecting a vehicle speed based on the determination result of the means, the lighting control means for controlling lighting of the light at a time delayed by a delay time from the determination time; A lighting control device for a vehicle, comprising: lighting condition setting means for setting the lighting reference illuminance higher as the height is higher and setting the delay time shorter.