KR102100088B1 - Dissimilar light source actuation circuit of the vehicle lamp device - Google Patents

Abstract

The heterogeneous light source driving circuit of the vehicle lamp device according to the present invention detects output values of different types of light sources and controls driving currents to apply power to vehicle lamp devices including different types of light sources, and then to Even if at least one of the light sources of the type is turned off, it is possible to cut off the power of the vehicle lamp device including the different types of light sources by determining the failure as a failure.

Description

DISSIMILAR LIGHT SOURCE ACTUATION CIRCUIT OF THE VEHICLE LAMP DEVICE}

The present invention, after applying power to a vehicle lamp device that includes different types of light sources, and when at least one light source among different types of light sources is turned off, the lights are determined as a failure, and different types of light sources are included. It relates to a heterogeneous light source driving circuit of a vehicle lamp device for cutting off the power of the vehicle lamp device.

In general, a vehicle is provided with a head lamp that secures a field of view in front and a tail lamp that displays status in the rear. In addition, vehicle lamp devices, such as headlamps and tail lamps, light up to improve the driving environment according to road conditions or to indicate the state of the vehicle to drivers of other vehicles.

In the related art, when the function of a vehicle lamp device for improving a driving environment or displaying a state of a vehicle is not smooth, a display device for notifying the driver of the vehicle is installed on the front of the driver's seat. In addition, in addition to warning of malfunction of the lamp device for a vehicle, a light distribution law (single light source failure) has been enacted to allow the power of the lamp device for a vehicle to be cut off in response to the malfunction.

Recently, different types of light sources, such as LED light sources and BULB light sources, have been applied to one vehicle lamp device for the purpose of cost reduction and aesthetics. However, since different types of light sources have different load characteristics, when they are applied to one vehicle lamp device, they have a drawback that they cannot cut off all of the different types of light sources by shutting off the power of the vehicle lamp device.

Accordingly, there is a need to develop a technology in which different types of light sources are applied to one vehicle lamp device and light sources of different types can be turned off simultaneously according to power control of the vehicle lamp device.

(1) Publication No. 10-2017-0124776 (Nov. 13, 2017) (2) Registered Patent Publication No. 10-1563546 (October 27, 2015) (3) Registered Patent Publication No. 10-0693312 (2007.03.14.) (3) Registered Patent Publication No. 10-0501681 (2005.07.18.)

The technical problem to be solved by the present invention is to apply power to a lamp device for a vehicle including different types of light sources, and when at least one light source among different types of light sources is extinguished, the extinguishment is determined as a failure and different from each other. It is to provide a heterogeneous light source driving circuit of a vehicle lamp device that cuts off the power of a vehicle lamp device including a kind of light source.

The heterogeneous light source driving circuit of the vehicle lamp device according to the present invention includes a power supply unit, a constant current and a niga unit, a first switching unit, a power supply unit, a second switching unit, a first light emitting unit, a first detection unit, a second light emitting unit, It includes a second detection unit, a fault determination unit and a switching control unit. The power supply unit supplies power. The constant current applying unit outputs a first driving output value according to the power supplied from the power supply. The first switching unit outputs a first driving current according to the first driving output value. The power applying unit outputs each of the second driving output value and the first comparison value according to the charging of the power storage element. The second switching unit outputs a second driving current by comparing the second driving output value with the first comparison value, and when charging of the power storage element is completed, compares the second driving output value with the second comparison value to generate a second driving current. 3 Output the driving current. The first light emitting unit emits light according to the first to third driving currents. When the first driving current is output from the first switching unit to the first light emitting unit, the first detection unit outputs a falling signal, and the first driving current is not output from the first switching unit to the first light emitting unit. Otherwise, a rising signal is output. The second light emitting unit emits light according to the second or third driving current. The second detection unit outputs a falling signal when the second or third driving current is output from the second switching unit to the second light emitting unit, and outputs a falling signal from the second switching unit to the second light emitting unit. If the third driving current is not output, a rising signal is output. When the falling signal is output from the first and second detection units, the fault determination unit outputs a rising signal to transmit a driving signal, and when a rising signal is output from at least one of the first and second detection units, a falling signal The output is controlled so that the driving signal is not transmitted. When the driving signal is transmitted from the failure determining unit, the switching control unit outputs the second comparison value to the second switching unit to operate to output the third driving current, and the driving signal is transmitted from the failure determining unit. Otherwise, the second comparison value is not output to the second switching unit.

The second switching unit controls the initial operation of the first and second light emitting units by outputting the second driving current according to the comparison of the second driving output value and the first comparison value, and controls the second driving output value and the It is composed of a P-Channel MOSFET that controls the operation after the first operation of the first and second light emitting units by outputting the third driving current according to the comparison of the second comparison value.

The first detection unit is configured as a transistor that determines the input of the base B according to the first driving current output from the first switching unit to the first light emitting unit and outputs a rising signal or a falling signal to the collector C. do.

The second detection unit determines the input of the base B according to the second or third driving current output from the second switching unit to the second light emitting unit and outputs a rising signal or a falling signal to the collector C. It consists of a transistor.

The fault determination unit is composed of two transistors, and the inputs of the bases B of each of the two transistors are determined according to the rising and falling signals of each of the first and second detection units, and the rising signal to the collector C is determined. Alternatively, a falling signal is output, and when a rising signal is input to the base B of at least one of the two transistors, control is performed such that the ground of the fault determination unit is connected to the input of the switching control unit.

The switching control unit determines the input of the base (B) according to the presence or absence of the driving signal transmitted from the fault determination unit to output a rising or falling signal to the collector (C), and the driving signal to the base (B) When input, the transistor is configured to output the second comparison value to the collector C by the current applied to the emitter E from the power supply unit.

As described above, the heterogeneous light source driving circuit of the vehicle lamp device according to the present invention applies power to a vehicle lamp device including different types of light sources by detecting output values of different types of light sources and controlling driving currents. After that, even if at least one light source among different types of light sources is turned off, it is possible to determine that the light is out of order and cut off the power of the vehicle lamp devices including the different types of light sources.

In addition, in the heterogeneous light source driving circuit of the vehicle lamp device according to the present invention, when at least one light source among different types of light sources is extinguished, the extinction is determined as a failure to power the vehicle lamp device including the different types of light sources. By blocking, it not only informs the driver that a problem has occurred in the function of the vehicle lamp device, but also has the effect of satisfying the light distribution regulations.

1 is a block diagram showing a heterogeneous light source driving circuit of a vehicle lamp device according to the present invention.
2 is a circuit diagram illustrating the embodiment of FIG. 1.
FIG. 3 is a graph representing simulation results according to normal operation of the first and second light emitting units illustrated in FIG. 1.
FIG. 4 is a graph representing simulation results according to abnormal operation of the first light emitting unit shown in FIG. 1.
FIG. 5 is a graph representing simulation results according to abnormal operation of the second light emitting unit illustrated in FIG. 1.

The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be interpreted as being limited by the examples described below. This embodiment is provided to more fully describe the present invention to those skilled in the art. Therefore, the shape of the components in the drawings are drawn to emphasize a clearer description.

Hereinafter, a preferred embodiment of a heterogeneous light source driving circuit of a vehicle lamp device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a heterogeneous light source driving circuit of a vehicle lamp device according to the present invention. 2 is a circuit diagram illustrating the embodiment of FIG. 1.

1 to 2, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention applies at least one of different types of light sources after applying power to a vehicle lamp device including different types of light sources. When one light source is turned off, the power supply unit 100, the constant current application unit 200, and the first switching unit 300 to cut off the power of the vehicle lamp device including the different types of light sources by determining the failure as a failure ), Power supply unit 400, second switching unit 500, first light emitting unit 610, first detection unit 620, second light emitting unit 630, second detection unit 640, fault identification unit It includes a 700 and the switching control unit 800.

First, the power supply 100 supplies power to the constant current applying unit 200. Specifically, the power supply unit 100 is provided with a battery to output a voltage to the input terminal of the constant current application unit 200.

The constant current applying unit 200 calculates the first driving output value according to the power supplied from the power supply unit 100 and outputs it to the output terminal. Specifically, the constant current applying unit 200 may be composed of an OP amplifier including a (+) input terminal and a (-) input terminal. That is, the power supply unit 100 is preferably supplied with a voltage from the constant current applying unit 200 to the (+) input terminal.

The first switching unit 300 outputs the first driving current according to the first driving output value. Specifically, the first switching unit 300 is preferably composed of an N-Channel MOSFET whose input terminal (Gate) is connected to the output terminal of the constant current applying unit (200) to output the first driving current to different output terminals of drain and source. .

The power applying unit 400 outputs each of the second driving output value and the first comparison value according to charging of the power storage element. Specifically, the power supply unit 400 is composed of a circuit including a current source, a diode, a capacitor (capacitor), and a resistor so that the capacitor can be charged by the resistor.

The second switching unit 500 compares the second driving output value output from the power applying unit 400 with the first comparison value to transfer the second driving current to the first light emitting unit 610 and the second light emitting unit 630. Output. In addition, when the charging of the power storage element is completed, the second switching unit 500 compares the second driving output value with the second comparison value to transfer the third driving current to the first light emitting unit 610 and the second light emitting unit 630. Output. Specifically, the second switching unit 500 outputs the second driving current according to the comparison of the second driving output value and the first comparison value, thereby operating the first light emitting unit 610 and the second light emitting unit 630 for the first time. When the charging of the power storage element is completed, and outputting the third driving current according to the comparison of the second driving output value and the second comparison value, the first 1 of the first light emitting unit 610 and the second light emitting unit 630 It can be configured as a P-Channel MOSFET that controls the operation after the rotation operation.
For reference, the second switching unit 500 is composed of a P-Channel MOSFET, and an operating characteristic of the P-Channel MOSFET flows current from source to drain when the gate voltage becomes smaller than the source voltage. That is, when the gate voltage becomes smaller than the source voltage by comparing the gate voltage (corresponding to the first comparison value or the second comparison value) and the source voltage (corresponding to the second driving output value), current flows from the source to the drain. Therefore, the second switching unit 500 performs a comparison function and a switch function.
That is, in this embodiment, the first comparison value and the second comparison value correspond to the gate voltage, and in particular, the first comparison value corresponds to the gate voltage applied to the gate before charging of the power storage element is completed, and the Since the second comparison value corresponds to a gate voltage applied to the gate after charging of the power storage element is completed, the first and second comparison values correspond to gate voltages before and after charging of the power storage element is completed. Means
Accordingly, the second driving current value is a gate voltage (ie, corresponding to the second driving output value) and a first comparison value (ie, corresponding to the gate voltage applied before charging of the power storage element is completed). , When the first comparison value is smaller than the source voltage, it means the current flowing from the source to the drain, and the third driving current value corresponds to the second comparison value (that is, the gate voltage applied after charging of the power storage element is completed) ) And the source voltage (corresponding to the second driving output value) means the current flowing from the source to the drain when the gate voltage (that is, the second comparison value) becomes smaller than the source voltage.

The first light emitting unit 610 emits light according to at least one of the second driving current or the third driving current output from the second switching unit 500 together with the first driving current output from the first switching unit 300, That is, it shines. The first light emitting unit 610 may be configured of, for example, an LED lamp.

When the first driving current is output from the first switching unit 300 to the first light emitting unit 610, the first detection unit 620 outputs a falling signal (0V), and the first switching unit 300 outputs the first driving current. When the first driving current is not output to the light emitting unit 610, a rising signal 5V is output. In detail, the first detection unit 620 determines the input of the base B according to the first driving current output from the first switching unit 300 to the first light-emitting unit 610, and the rising signal to the collector C is determined ( 5V) or a falling signal (5V).

The second light emitting unit 630 emits light according to the second driving current or the third driving current. The second light emitting unit 630 may be formed of, for example, BULB lamps having different load characteristics from the first light emitting unit 610.

When the second driving current or the third driving current is output from the second switching unit 500 to the second light emitting unit 630, the second detection unit 640 outputs a falling signal (0V), and the second switching unit ( If the second driving current or the third driving current is not output from the 500 to the second light emitting unit 630, a rising signal 5V is output. Specifically, the input of the base B is determined by the second detection unit 640 according to the second driving current or the third driving current output from the second switching unit 500 to the second light emitting unit 630 and the collector C It may be composed of a transistor that outputs a rising signal (5V) or falling signal (0V) with.

When the fall signal 0V is output from both the first detection unit 620 and the second detection unit 640, the fault determination unit 700 outputs a rising signal 5V to transmit a driving signal applied to the resistance. When the rising signal 5V is output from at least one of the detection unit 620 and the second detection unit 640, the falling signal 0V is output to control transmission of the driving signal applied to the resistance. Specifically, the fault determination unit 700 may be composed of two transistors. The input of the base B of each of the two transistors is determined in accordance with the rising signal 5V and the falling signal 0V of the first detection unit 620 and the second detection unit 640, respectively. Output the rising signal (5V) or falling signal (0V) to the collector (C), when the rising signal (5V) is input to the base (B) of at least one of the two transistors, the input of the switching control unit 800 In order to control the ground of the fault determination unit 700 to be connected. That is, in the fault determination unit 700, one resistor is connected to the switching control unit 800 together with two transistors, and the rising signal 5V is obtained from at least one of the first detection unit 620 and the second detection unit 640. When it is output, it is determined that at least one of the first light emitting unit 610 and the second light emitting unit 630 has failed, so that the ground (0V) is connected to the input of the switching control unit 800.

The switching control unit 800 operates to output a second comparison value to the second switching unit 500 when the driving signal is transmitted from the fault determination unit 700 to output the third driving current. In addition, the switching control unit 800 does not output a second comparison value to the second switching unit when the drive signal is not transmitted from the fault determination unit 700 and the input terminal is connected to the ground of the fault determination unit 700. Specifically, the switching control unit 800 determines the input of the base B according to the presence or absence of a driving signal transmitted from the fault determination unit 700, outputs a rising signal or a falling signal to the collector C, and outputs the base B. When the driving signal is input to the, it may be composed of a transistor that outputs a second comparison value to the collector (C) by the current applied to the emitter (E) from the power supply unit 400.

Specifically, the heterogeneous light source driving circuit of the vehicle lamp device according to the present invention will be described with reference to FIGS. 1 to 2 in addition to FIGS. 3 to 5.

FIG. 3 is a graph representing simulation results according to normal operation of the first and second light emitting units illustrated in FIG. 1. FIG. 4 is a graph representing simulation results according to abnormal operation of the first light emitting unit shown in FIG. 1. FIG. 5 is a graph representing simulation results according to abnormal operation of the second light emitting unit illustrated in FIG. 1.

Referring first to FIG. 3, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention includes the BULB lamp corresponding to the second light emitting unit 630 and the LED lamp corresponding to the first light emitting unit 610. When the operation is normally performed, the BULB current 11 and the LED current 12 flowing through each of the second light emitting unit 630 and the first light emitting unit 610 also maintain a predetermined size. In addition, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention is supplied by a power storage element in the RC circuit of the power applying unit 400 to supply the driving current applied during the first operation of each of the BULB lamp and the LED lamp. When the Vgate · GND value 13 increases, and the Vgate · GND value 13 reaches a predetermined size, the second switching is performed by outputting a second driving output value above a threshold voltage from the current source of the power supply unit 400 The voltage difference 14 between the gate and the source of the unit 500 reaches a certain level, and accordingly, the driving current after the initial operation of each of the BULB lamp and the LED lamp can be continuously supplied. In addition, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention, when a constant current is maintained in the first light emitting unit 610 and the second light emitting unit 630, the first detection unit 620 and the Each of the 2 detection units 640 outputs a falling signal (0V), and the rising signal (5V) according to the falling signal (0V) in the failure detection unit 700 connected to the first detection unit 620 and the second detection unit 640 ) To output the second comparison value from the switching control unit 800.

Referring to Figure 4 further, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention, the operation of the BULB lamp corresponding to the second light emitting unit 630 is normally made so that the BULB current 11 maintains a certain size However, if it is determined that the operation of the LED lamp corresponding to the first light emitting unit 610 is abnormal, and the LED current 12 falls below a predetermined size, the voltage difference 14 between the gate and the source of the second switching unit 500 Is output less than a predetermined size, so that the driving current is not supplied to the first light emitting unit 610 as well as the second light emitting unit 630. In addition, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention, even if the second light emitting unit 630 is operating normally, if the LED current 12 of the first light emitting unit 610 falls below a predetermined size, the 1 detection unit 620 outputs a rising signal (5V), the first detection unit 620 and the second detection unit 640 connected to the failure determination unit 700, the falling signal according to the rising signal (5V) (0V) By outputting, it is possible to control so that the second comparison value is not output from the switching control unit 800.

Referring to Figure 5 further, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention, the operation of the LED lamp corresponding to the first light emitting unit 610 is normally made so that the LED current 12 maintains a certain size However, if it is determined that the operation of the BULB lamp corresponding to the second light emitting unit 630 is abnormal, and the BULB current 11 falls below a predetermined size, the voltage difference 14 between the gate and the source of the second switching unit 500 Is output less than a predetermined size, so that the driving current is not supplied to the first light emitting unit 610 as well as the second light emitting unit 630. In addition, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention is the first light emitting unit 610, even if the BULB current 11 of the second light emitting unit 630 falls below a predetermined size, the first 2 The detection unit 640 outputs a rising signal (5V), the first detection unit 620 and the second detection unit 640 connected to the fault determination unit 700, the falling signal (0V) according to the rising signal (5V) By outputting, it is possible to control so that the second comparison value is not output from the switching control unit 800.

Therefore, the heterogeneous light source driving circuit 10 of the vehicle lamp device according to the present invention includes a first detection unit 620 and a second detection unit that detects a driving current applied to each of the first light emitting unit 610 and the second light emitting unit 630. The detection unit 640 is connected to the failure determination unit 700 to control the output value of the second switching unit 500, so that the first light emitting unit 610 and the second light emitting unit 630 can be turned off at the same time.

In the above, although the heterogeneous light source driving circuit of the vehicle lamp device of the present invention is shown in accordance with the detailed description and drawings, it is merely described as an example, and various changes and changes are within the scope without departing from the technical spirit of the present invention. It is possible.

10: heterogeneous light source driving circuit of a vehicle lamp device
100: power supply
200: constant current application part
300: first switching unit
400: power supply
500: second switching unit
610: first light emitting unit
620: first detection unit
630: second light emitting unit
640: second detection unit
700: Fault identification part
800: switching control unit

Claims (6)

A power supply unit that supplies power;
A constant current applying unit outputting a first driving output value according to the power supplied from the power supply unit;
A first switching unit outputting a first driving current according to the first driving output value;
A power applying unit that outputs each of the second driving output value and the first comparison value according to charging of the power storage element;
The second driving output value is compared with the first comparison value to output a second driving current, and when charging of the power storage element is completed, the second driving output value is compared with the second comparison value to output a third driving current. A second switching unit;
A first light emitting unit emitting light according to the first to third driving currents;
When the first driving current is output from the first switching unit to the first light emitting unit, a falling signal is output, and if the first driving current is not output from the first switching unit to the first light emitting unit, a rising signal is generated. A first detection unit to output;
A second light emitting unit emitting light according to the second or third driving current;
When the second or third driving current is output from the second switching unit to the second light emitting unit, a falling signal is output, and the second or third driving current is output from the second switching unit to the second emitting unit. If is not output, a second detection unit for outputting a rising signal;
When a falling signal is output from the first and second detection units, a rising signal is output to transmit a driving signal. When a rising signal is output from at least one of the first and second detection units, a falling signal is output to output the falling signal. A fault determination unit that controls the driving signal not to be transmitted; And
When the driving signal is transmitted from the failure determining unit, the second comparison value is output to the second switching unit to operate to output the third driving current, and if the driving signal is not transmitted from the failure determining unit, the A switching control unit which does not output a second comparison value to the second switching unit;
Heterogeneous light source driving circuit of the vehicle lamp device comprising a.
The method according to claim 1,
The second switching unit,
The first driving current is controlled by outputting the second driving current according to the comparison between the second driving output value and the first comparison value, and the second driving output value is compared with the second comparison value. A heterogeneous light source driving circuit for a vehicle lamp device comprising a P-Channel MOSFET that controls the operation after the first operation of the first and second light emitting units by outputting the third driving current according to comparison.
The method according to claim 1,
The first detection unit,
Characterized in that the input of the base (B) is determined according to the first driving current output from the first switching unit to the first light-emitting unit is composed of a transistor that outputs a rising or falling signal to the collector (C) A heterogeneous light source driving circuit for a vehicle lamp device.
The method according to claim 1,
The second detection unit,
An input of the base (B) is determined according to the second or third driving current output from the second switching unit to the second light emitting unit, and is composed of a transistor that outputs a rising signal or a falling signal to the collector (C). Heterogeneous light source driving circuit of the vehicle lamp device, characterized in that.
The method according to claim 1,
The fault determination unit,
It is composed of two transistors, and the input of the base (B) of each of the two transistors is determined according to the rising and falling signals of each of the first and second detectors, and the rising or falling signal is sent to the collector (C). When output, and when a rising signal is input to the base (B) of at least one of the two transistors, the heterogeneous light source of the vehicle lamp device is characterized in that the ground of the fault discrimination unit is connected to the input of the switching control unit. Driving circuit.
The method according to claim 1,
The switching control unit,
When the input of the base B is determined according to the presence or absence of the driving signal transmitted from the fault determination unit, and outputs a rising or falling signal to the collector C, and when the driving signal is input to the base B, the A heterogeneous light source driving circuit for a vehicle lamp device, comprising a transistor that outputs the second comparison value to a collector (C) by a current applied to the emitter (E) from a power supply.

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