KR19980028295A - Headlight brightness control device - Google Patents

Abstract

The present invention relates to a headlight brightness control apparatus for a vehicle for allowing a driver to easily adjust the brightness of a headlight using a multivibrator.

The headlamp brightness control apparatus of a vehicle of the present invention includes a power supply unit for supplying power, a first switching unit connected to the power supply unit, and switching power supplied from the power supply unit, and connected to the switching unit, by artificial adjustment. A multivibrator for outputting two other pulses, a second switching unit switched by the multivibrator and switching power supplied through the first switching unit, and a headlamp connected to the second switching unit.

Description

Headlight brightness control device of vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling headlight brightness of a vehicle, and more particularly, to an apparatus for controlling headlight brightness of a vehicle for allowing a driver to easily adjust the brightness of a headlight using a multi-vibrator.

In general, the vehicle is equipped with a headlight to illuminate the front of the vehicle when driving at night, the headlights are lowered according to the driver's choice to operate as a downlight for illuminating the lower side and an uplight for illuminating the upper direction.

As a general rule, when driving at night, the high beams obstruct the driving of other vehicles, so they are not frequently used, and mainly use low beams to illuminate the road.

Conventional headlights have a fixed light intensity, and the driver cannot arbitrarily adjust the brightness of the headlamps due to the bright and dark surroundings.

Therefore, the conventional headlights as described above are inconvenient for the driver who operates a very dark place, such as a tunnel, because the brightness is not controlled, and sometimes the driver may not accurately judge the lanes and cause a dangerous accident. Existed.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and provides a headlight brightness control apparatus for a vehicle that allows the driver to arbitrarily adjust the brightness of the headlight according to the darkness of the driving area by using the knob of the multivibrator. There is a purpose.

1 is a circuit diagram of a headlight brightness control apparatus for a vehicle according to an embodiment of the present invention.

2 (P1) and (P2) are pulses showing the characteristics of the brightness of the vehicle conduction lamp according to the present invention.

* Explanation of symbols on the main parts of the drawing

10: power supply unit 20: headlight

30: multivibrator 40: luminance control means

50: headlight switch 31: knob

32: first discharge means 33: second discharge means

34: first pulse generating means 35: second pulse generating means

In order to achieve the above object, a headlight brightness control apparatus for a vehicle according to the present invention includes a power supply unit for supplying power, a first switching unit connected to the power supply unit, and switching power supplied from the power supply unit, and connected to the switching unit. And a multivibrator for outputting two different pulses by artificial adjustment, a second switching unit switching by the multivibrator to switch power supplied through the first switching unit, and a headlamp connected to the second switching unit. It includes.

EXAMPLE

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 is a circuit diagram of an apparatus for controlling headlight brightness of a vehicle according to an exemplary embodiment of the present invention.

Referring to Figure 1, the headlight brightness control apparatus of the present invention is artificially adjusted to control the brightness of the power supply unit 10 for supplying power, and the headlight 20 shining the front of the vehicle two different A multi-vibrator 30 for generating and outputting a pulse, a brightness control means 40 for controlling the brightness of the headlamp 20 based on a pulse input from the multi-vibrator 30, and artificially turned on brightness control means ( 40 and a headlight switch 50 for applying power to the multivibrator 30.

The headlight switch 50 is artificially turned on / off by a user, and applies the power applied from the power supply unit 10 to the multi-vibrator 30 and the brightness control means 40 when turned on.

The multivibrator 30 is rotated from side to side by the user so that the magnitudes of the resistance values of the first and second variable resistors RB1 and RB2 are opposite to each other, and that of the first variable resistor RB1 is adjusted. The larger the resistance value, the longer the discharge time and the smaller the resistance value, the shorter the discharge time. The first discharge means 32 including the first capacitor C1 and the second variable resistor RB2 discharge when the resistance value increases. The longer the time is, the smaller the discharge time is, the shorter the discharge time is, the second discharge means 33 including the second capacitor C2, the resistance value of the first variable resistor RB1 and the discharge time of the first discharge means 32. On the basis of the first pulse generating means 34 including the first transistor TR1 for controlling the shape of the output pulse, the resistance value of the second variable resistor RB2 and the discharge time of the second discharge means 33. A second pulse having a second transistor TR2 for controlling the shape of the output pulse based on It includes a production means (35).

The brightness control means 40 inputs a pulse output from the multi-vibrator 30 to the base end, and controls the power applied to the collector stage based on the input pulse form to output the third transistor ( TR3). The third transistor TR3 included in the luminance control means 40 is turned off when the first transistor TR1 is turned on, and turned on when the second transistor TR2 is turned on.

The first transistor TR1 of the first pulse generating means 34 is turned on by the power applied from the first discharging means 32 to the base end, and when turned on, is applied to the collector end through the first resistor R1. The power is controlled to generate a pulse, and the emitter stage is connected to ground.

The second transistor TR2 of the second pulse generating means 35 is turned on by the power applied from the second discharging means 33 to the base end, and if so, is applied to the collector end through the second resistor R2. The power is controlled to generate a pulse, and the emitter stage is connected to ground.

At this time, the first pulse generating means 34 and the second pulse generating means 35 generate different types of pulses.

The first pulse P1 and the second pulse P2 generated by the first pulse generating means and the second pulse generating means in FIG. 2 are shown.

When the knob 31 is turned to the right, the resistance value of the first variable resistor RB1 is increased, so that the discharge time of the first discharge means 32 is increased, which causes the first pulse generating means 34 to generate the second pulse of FIG. 2. One pulse P1 is generated, on the other hand, the resistance value of the second variable resistor RB2 is reduced, and the discharge time of the second discharge means 33 is shortened, which causes the second pulse generating means 35 to The second pulse P2 of FIG. 2 is generated.

As such, when the first pulse P1 is generated in the first pulse generating means 34 and the second pulse P2 is generated in the second pulse generating means 35 and input to the brightness control means 40, The brightness control means 40 brightens the brightness of the headlamp 20.

In addition, when the knob 31 is turned to the right, the resistance value of the first variable resistor RB1 becomes small and the discharge time of the first discharge means 32 is shortened, which causes the first pulse generating means 34 to The second pulse P2 of 2 is generated, on the other hand, the resistance value of the second variable resistor RB2 is increased, and thus the discharge time of the second discharge means 33 is lengthened, which causes the second pulse generating means 35 ), The first pulse P1 of FIG. 2 is generated.

As such, when the second pulse P2 is generated in the first pulse generating means 34 and the first pulse P1 is generated in the second pulse generating means 35 and input to the luminance control means 40, The brightness control means 40 darkens the brightness of the headlamp 20.

On the other hand, since the frequency generated is high even when the turn-on and turn-off states of the first and second transistors TR1 and TR2 cross, the headlamp 20 does not blink and maintains a lighting state.

As described above, the headlight brightness control apparatus of the vehicle according to the present invention arbitrarily adjusts the brightness of the headlights that illuminate the vehicle according to the darkness of the surroundings of the vehicle, thereby improving the safety of the driving and preventing dangerous accidents. It provides an excellent effect that can be prevented.

Claims (3)

A power supply unit for supplying power, a first switching unit connected to the power supply unit for switching power supplied from the power supply unit, a multivibrator connected to the switching unit, and outputting two different pulses by artificial adjustment; And a second switching unit which is switched by the multivibrator to switch power supplied through the first switching unit, and a headlamp connected to the second switching unit. The multivibrator of claim 1, wherein the multivibrator is rotated left and right by a user so that the magnitudes of the resistance values of the first and second variable resistors are opposite to each other. And a first capacitor having a first capacitor, the discharge time of which is shortened when the resistance value decreases. A first pulse generating means 34 comprising a second discharge means, a first transistor for controlling the shape of an output pulse based on a resistance value of the first variable resistor and a discharge time of the first discharge means, and a second variable And second pulse generating means having a second transistor for controlling the shape of the output pulse based on the resistance value of the resistance and the discharge time of the second discharge means. Headlight brightness control device of the vehicle. The vehicle according to claim 1, wherein the second switching unit has a base electrically connected to the output terminal of the multivibrator, a collector is electrically connected to the first switching unit, and an emitter is electrically connected to the headlamp. Headlight brightness control device.