JPH07315122A - Light-volume control device for head-light lamp - Google Patents

Abstract

PURPOSE:To enhance the safety of driving by automatically controlling the light volume of a head lamp during nighttime driving so as to reduce the burden on the driver due to switching of the head lamp. CONSTITUTION:A light receiving element C is incorporated in a light receiving part C1 installed in the front part of an automobile, and switching can be made by a relay R through the intermediary of a circuit in which semiconductors such as an IC 1 and a transistor T are connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically controlling the light quantity of a vehicle headlight.

[0002]

2. Description of the Related Art Conventionally, an automobile illuminates the front by observing the amount of light of a headlight to an oncoming vehicle by a switch operation while driving at night to check for obstacles. In addition, oncoming vehicles have taken similar measures and have tried to drive each other safely.
However, the repeated switching operation of headlights on a curved road has been troublesome.

[0003]

In the conventional method, the above-described headlight switching switch uses a lever adjacent to the handle and operates the lever back and forth to move the lever forward and backward.
Although the headlight relays that are interlocked with each other were moved to change the light intensity of the headlights, the switch operation while operating the steering wheel could lead to an accident. In addition, when the vehicle heads downwards due to the troublesome operation of switching the light amount of the headlight each time the vehicle faces, the visibility is poor and dangerous. The present invention solves the above problems and is widely used for safe driving of automobiles.

[0004]

As a method for solving the above problems, a headlight of an oncoming vehicle traveling straight ahead is sensed by a light receiver mounted in front of the vehicle, and a relay of the headlight is operated. Switch the light intensity of the lamp.

[0005] In the case of a left-hand drive in Japan, the light-receiving part is mounted in front of the automobile, and the light of the headlight coming in from a limited angle on the right side from the front is sensed and headlight is transmitted until just before an oncoming vehicle passes. Fix the relay of the lamp, and after passing the oncoming vehicle, if there is a following oncoming vehicle, keep that state. It is a device for returning to the position.

[0006]

The light receiving body (C), which is mounted inside the cylindrical light receiving portion (C1) and whose tip is sealed with the transparent body (G) using glass or resin, is connected to the IC (I), and the voltage is applied. Is adjusted by a semi-fixed resistor (V), amplified by an amplifier and a hysteresis comparator provided inside the IC (I), and the light amount is digitally processed, and a signal is sent to the transistor (T).
Amplifies the current flowing through the relay (R) to move the relay (R). The relay (R) operates the headlight relay to switch the light amount of the headlight.

[0007]

EXAMPLES Examples of actual rotation will be described with reference to the drawings.
In Fig. 1, the semi-fixed resistance (V) from the headlight line
To the IC (I), the photodetector (C) and the transistor (T) via the IC (I), and the relay (R).
I am reading to. In FIGS. 2 and 3, the light receiving part (C1) is attached with the light receiving part (C), and the tip is sealed with the transparent part (G) to form the light receiving part (C1).

[0008]

The light quantity control device for a headlight constructed as described above automatically controls the light quantity of the headlight even when driving at night, and there is no need to pay attention to an oncoming vehicle. Safety is improved on the road.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing the basics of the present invention.

FIG. 2 is a side view showing an example of a light receiving section.

FIG. 3 is a sectional view taken along line AA.

[Explanation of symbols]

 C1 ... Light receiving part C ..... Light receiving body G .... Transparent body V .... Semi-fixed resistance I IC T Transistor R Relay

Claims (2)

[Claims] 1. A light receiving body C is mounted inside a light receiving portion C1,
A headlight characterized by amplifying a signal with an electronic circuit combining semiconductors and operating a relay R to operate a relay of the interlocking headlight to control switching of the light amount of the headlight. Light control device. 2. A light receiving body C is mounted inside the light receiving portion C1,
A light quantity control device for a headlight, characterized in that a signal is amplified by an electronic circuit combining semiconductors and a relay of the headlight is activated to control switching of the light quantity of the headlight.