KR890005123B1 - Lighting device of headlight - Google Patents

Abstract

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Description

Daytime headlight lighting device

The figure is a circuit diagram for demonstrating the whole structure of this invention.

* Explanation of symbols for main parts of the drawings

5: Taillight 7: Downlight

8: Mission switch 12: Travel detection unit

D _4: Diodes Q _1, Q _2, Q ₃ : Transistors

VR ₁ : Variable resistance IC: Generator

The present invention relates to a daytime headlight lighting device attached to various vehicles such as a passenger car or a van, so that a pedestrian can easily detect the approach of the vehicle during the day.

In general, daytime pedestrians tend not to pay much attention compared to nighttime, and there is no tool or daytime pedestrians to notice the vehicle approaching from the side easily, especially when a vehicle driving at high speed suddenly When approaching, pedestrians were not aware of this at all, resulting in traffic accidents, which resulted in the loss of valuable lives and huge property losses.

Therefore, the emergence of a device that can easily recognize the approaching vehicle even if the pedestrian does not pay much attention.

The object of the present invention is to meet the demands of the daytime vehicle only automatically when the headlights are turned on at a brightness of 0-80% at night, the daytime pedestrians easily recognize the vehicle approaching body It is possible to avoid the traffic accident incidence as much as possible to avoid, and also to adjust the brightness of the low-lights lowered during the day appropriately so as not to give severe stimulation, ie vision impairment in the eyes of the pedestrians, the present invention Another purpose of the is to flow a small current to the low-light to emit light of red-yellow color to obtain the effect of securing the clock as in the case of attaching a fog light.

The object of the present invention as described above can be realized by a circuit and a driving transistor for oscillating at an arbitrary frequency determined by the user by a device for sensing the copper of the speedometer cable and a signal received from the detection switch of the transmission. Referring to the configuration and effect in detail according to the accompanying drawings as follows.

As shown in the figure, the headlight selector switch 2 and the dimmer switch 3, the flush switch 4 and the tail light 5, and the uplight are connected to both terminals 1 and 1 'of the power supply. (6) A mission switch (8) connected in series or in parallel with a downlight (7), with the gear of transmission being "ON" when the gear in the transmission is in the forward or reverse position and "OFF" when in the neutral position. ) Is connected to a charge / discharge circuit composed of a variable resistor (VR ₁ ), a resistor (R ₁ ) diode (D ₁ ), a zener diode (ZD ₁ ) condenser (C ₁ ), and rotates according to the operation of the engine. Hall element 9 and differential and rectification circuit DR, amplification and smoothing unit 10, and A / D conversion unit 11, which have permanent magnets attached to one end and are installed on the outer circumference to generate minute signal voltages only while driving. Of the oscillator (IC) of the travel detecting unit 12 in which the high level signal is obtained while driving and the low level signal is obtained while driving. The discharge port of the terminal connected to the (ret) and sikimyeo grounded via the resistor (R _4), the oscillator (IC) (dis), the trigger terminal (Trigger), thread resist enters in action (Threshold) terminal (Thr) (R ₁₎ and daah Eau (D ₁ ) is connected, and the output terminal (out) of the oscillator (IC) is connected to the transistor (Q ₁ ) by connecting a resistor (R ₅ ), (R ₆ ), a capacitor (C ₃ ), depending on the collector voltage of (Q ₁₎ so that the transistor _{(Q 2), (Q 3} ) operation, and the transistor (Q _2), and that the emitter is applied to the power source of the battery of (Q ₃₎ that the collector downwardly and so on (7), the diode (D ₄ ) is inserted between the meter and the tail light (5) in the transistor (Q ₁ ), reference numeral 13 is the main switch, C ₂ is the bypass capacitor, C ₃ is a smoothing capacitor, D ₂ , D ₃ , D ₅ , and D ₆ are diodes R ₂ , R ₃ , R ₇ , R ₈ , R ₉ , and R ₁₀ are resistors, and ZD ₂ is a zener diode.

Referring to the effect of the present invention as described above is as follows.

The driver places the headlight selector switch 2 in the "OFF" position to drive the vehicle during the day and the tail light 5, the upper light 6 and the lower light with the flush switch 4 "OFF". (7) is turned off, the main switch 13 is turned "ON" and the lever of the transmission is moved to the forward or reverse position so that the vehicle can start and drive as the speedometer cable is rotated. A predetermined voltage comes out of the branch 12.

At this time, since the voltage applied from the mission switch 8 is greater than or equal to the zener voltage of the zener diode ZD ₁ , the capacitor C ₁ is charged through the diode D ₁ through the variable resistor VR ₁ .

이 된다. 즉, 가변저항(VR₁)의 값을 크게하면 주파수는 낮아지고 가변저항(VR₁)의 값을 작게하면 주파수는 높아지므로, 출력주파수를 사용자 임의로 정할 수 있게되는 것이고, 출력파형에 있어서, 듀티싸이클(duty cycle) (출력이 1이 되는 시간은 출력이 0이되는 시간으로 나눈값)은 다이오드(D₁)과 제너다이오드(ZD₁)에 의하여

로 결정되는 것이어서 듀티싸이클의 변화범위를 크게할 수 있는 것이어서, 결국 출력단자(OUT)로 출력되는 신호의 파형 및 주파수를 임의로 조적할 수 있어서 트랜지스터(Q₁)을 통하여 흐르는 전류의 크기와 제어되는 결과가 된다.At this time, the capacitor (C ₁₎ there would be all of the power-supply voltage charging, a voltage corresponding to 2/3 of the power supply voltage supplied by the instantaneous oscillator (IC) inside a voltage comparator is applied to the capacitor (C ₁₎ output state The capacitor C ₁ discharges to the discharge terminal dis through the resistor R ₁ , and when discharged, the oscillator (when the voltage across the capacitor C ₁ becomes 1/3 of the power supply voltage). IC) The output state is changed by repeating the method that the output state is reversed again by the voltage comparator inside, and the output waveform at this time becomes a rectangular wave, where the output frequency f is

Becomes In other words, if the value of the variable resistor VR ₁ is increased, the frequency is lowered. If the value of the variable resistor VR ₁ is reduced, the frequency is increased, so that the output frequency can be arbitrarily determined by the user. The duty cycle (time of output 1 divided by time of output 0) is driven by diode (D ₁ ) and zener diode (ZD ₁ ).

The range of duty cycle can be increased, so that the waveform and frequency of the signal output to the output terminal OUT can be arbitrarily adjusted to control the magnitude and current of the current flowing through the transistor Q ₁ . Result.

In addition, in the present invention, as a condition necessary for the operation of the oscillator (IC), in addition to the mission switch 8, there should be an output voltage of the travel detecting unit 12 generated by the speedometer cable, and this voltage is used to operate the oscillator IC, When the output voltage of the driving detection unit 12 is absent or lost, the reset terminal of the oscillator IC is grounded through the tail light 5 through the resistor R ₄ , thereby falling into an inoperable state.

In this case, when the vehicle is in a normal driving state, the variable resistor VR ₁ connected to the oscillator IC is increased to increase the time when the frequency is low and the output is 1 so that a large amount of current flows in the transistor Q ₁ . and by to flow in the down-light (7) a large current from the power source through the transistor (Q ₂₎ (Q ₃₎ so that can emit light with high brightness, state with less control the resistance of the variable resistor (VR ₁₎ As a result, the oscillation frequency of the oscillator IC is high and the time when the output becomes 1 is short, so that the current flowing through the transistors Q ₁ , Q ₂ , and Q ₃ is small, so that the downlight 7 has low luminous intensity. It can be made to emit light.

In this way, when the vehicle is driving, the downlight 7 emits light at a suitable brightness adjusted by the user, so that the pedestrian can easily recognize the approach of the vehicle to prevent traffic accidents without paying special attention. In addition, when the vehicle stops for a while, the rotation of the speedometer cable stops and disappears at the output of the travel detecting unit 12, so that the operation is stopped while the oscillator IC is reset, and the downlight 7 is completely turned off. When the vehicle starts again, the down light is turned on in the same manner as described above to operate normally.

In addition, when the driver sets the selector switch 2 to the I side to operate the vehicle in the early evening or at night, the emitter of the transistor Q ₁ is disconnected from the power supply because the supply voltage is applied to the anode of the diode D ₄ . Transistor Q ₂ (Q ₃ ) stops operation regardless of whether the oscillator IC is operated, the tail light 5 is engaged and performs normal operation, and the headlight selection position 2 is changed to II. Even when placed in position, power is supplied to the collector of transistors Q ₂ and Q ₃ through the dimmer switch 3, so that the oscillator IC is operated with the emitter to which the power voltage is applied. Regardless of whether the power supply voltage is applied directly to the downlight 7 through the headlight selection switch 2 and the dimmer switch 3, the normal operation is performed.

As described above, the present invention can easily recognize a pedestrian's access to the vehicle during the daytime operation, thereby preventing traffic accidents. Also, by adjusting the variable resistance appropriately, the filament of the downlight emits yellow-red light, such as fog light. It also has the advantage that it can make an effect, but it does not affect the operation of the existing taillights, uplights, and downlights at all, and it is very convenient to use.

Claims (2)

Connect the mission switch 8 and the travel detection unit 12 to the power supply terminal and reset terminal of the oscillator IC, and connect the variable resistor VR ₁ for adjusting the oscillation frequency and duty cycle to the oscillator IC. , The daytime headlight lighting device is connected by connecting the output of the oscillator (IC) and the transistor (Q ₁ ) (Q ₂ ) (Q ₃ ) for lighting the downlight (7). _2. A diode (D ₄ ) according to claim 1, wherein a diode (D ₄ ) is inserted between the emitter of the transistor (Q ₁ ) and the known tail lamp (5) to stop the operation of the transistor (Q ₂ ) (Q ₃ ) at the time of tail light. Daytime headlight lighting device.

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