CN211335736U - Driving circuit of far and near headlight - Google Patents
Driving circuit of far and near headlight Download PDFInfo
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- CN211335736U CN211335736U CN201921786745.XU CN201921786745U CN211335736U CN 211335736 U CN211335736 U CN 211335736U CN 201921786745 U CN201921786745 U CN 201921786745U CN 211335736 U CN211335736 U CN 211335736U
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- 239000003990 capacitor Substances 0.000 claims description 6
- 230000001629 suppression Effects 0.000 claims description 6
- 230000001052 transient effect Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a drive circuit of far and near headlight, including power supply circuit, drop circuit, temperature control circuit, far-reaching headlamp circuit, passing lamp circuit and control circuit, power supply circuit provides operating voltage VCC, and drop circuit output operating voltage +5V, temperature control circuit are according to the break-make of thermistor control far-reaching headlamp and passing lamp, the switching and the break-make of control circuit control far-reaching headlamp and passing lamp. The utility model discloses circuit structure with reliable control by temperature change function and stabilized current voltage output function and reliable far and near light switching function.
Description
Technical Field
The utility model relates to a control circuit technical field, especially a drive circuit of far and near headlight.
Background
The control circuit of the far and near lamp is particularly important for the control of the far and near lamp at present, and it is known that all LED lamps have the problem of heat dissipation, so that the control circuit of the far and near lamp is particularly important for the temperature monitoring of the far and near lamp, but the temperature control circuit is not used for monitoring the temperature of the far and near lamp in the current far and near lamp control circuit. And the switching of the distance light and the short-distance light of the distance light is simple, and the distance light and the short-distance light are respectively and independently controlled, the integration ratio of the circuit is poor, and the simple circuit is convenient to overhaul but cannot ensure the whole function.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, provide a drive circuit of far and near headlight, realize control by temperature change and reliable and stable far and near light switching control through hardware control.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a driving circuit of a far and near headlight comprises a power supply circuit, a voltage drop circuit, a temperature control circuit, a far headlight circuit, a dipped headlight circuit and a control circuit, wherein the power supply circuit comprises an access end LB _ V +, an access end V-, an access end HB _ V +, the three access ends are respectively connected with an inductor L1, an inductor L4 and an inductor L8 in series to form a differential mode, the access end LB _ V + and the access end V-are sequentially connected with a common mode inductor L3, a transient voltage suppression diode TVS1 and an LC filter circuit in parallel to finally output a working voltage VCC, the access end HB _ V + series diode D4 and a resistor R43 are connected with a G end of a switch tube Q6, and the switch tube Q6 is used for controlling the connection and disconnection of an access end LED-to the ground; the input end of the voltage drop circuit is connected with the common voltage VCC and outputs the working voltage + 5V; the control circuit comprises a controller U3, the controller U3 monitors the current value of a thermistor HB _ NTC in a high beam circuit and a thermistor LB _ NTC in a low beam circuit and outputs the control of the G end of a switch tube Q6; the high-beam lamp circuit comprises a high-beam lamp set LED2, the positive pole end of the high-beam lamp set LED2 is connected with the access end LED-, and the negative pole end of the high-beam lamp set LED2 is connected with the access end HB _ H-; the dipped headlight circuit comprises a dipped headlight group LED1, the positive pole end of the dipped headlight group LED1 is connected with the access end LED +, and the negative pole end is connected with the access end LED-; the control circuit comprises a controller U1, the working voltage VCC controls the output of the input end LED + through a switch tube Q1, and the controller U1 controls the output of the G end of the switch tube Q1.
In the above technical solution, a filter circuit and a diode D5 are connected in series between the operating voltage VCC and the switching tube Q1, the filter circuit includes an inductor L10 and capacitors C20, C23, C24, C25, C26, and C27, and a diode D5 is connected in parallel with a capacitor 18 and a resistor R5; an iron core inductor L9 is also connected in series between the switching tube Q1 and the access end LED +.
In the above technical solution, the output of the controller U3 realizes the control of the G terminal of the switching tube Q6 through the switching tube Q5, the switching tube Q4 and the switching tube Q8; the output end of the controller U3 controls the G end of the switch tube Q5, the conduction of the switch tube Q5 controls the conduction of the switch tube Q4, and the conduction of the switch tube Q4 controls the conduction of the switch tube Q8.
In the technical scheme, a transient voltage suppression diode TVS2 is connected in parallel behind the access end HB _ V + and the access end V-in series inductor.
The utility model has the advantages that: the whole circuit structure has strong reliability, and the circuit structure with reliable temperature control function, stable current and voltage output function and reliable far and near light switching function is formed by the power supply circuit, the voltage drop circuit, the temperature control circuit, the far light circuit, the near light circuit and the control circuit.
Drawings
Fig. 1 is an overall schematic diagram of the control circuit of the present invention.
Fig. 2 is a schematic diagram of the power supply circuit of the present invention.
Fig. 3 is a schematic diagram of the low beam lamp circuit of the present invention.
Fig. 4 is a schematic diagram of the high beam circuit of the present invention.
Fig. 5 is a schematic diagram of a control circuit according to the present invention.
Fig. 6 is a schematic diagram of the voltage drop circuit and the temperature control circuit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-6, a driving circuit of a headlight for a long distance or a short distance vehicle comprises a power supply circuit, a voltage drop circuit, a temperature control circuit, a headlight circuit, a dipped headlight circuit and a control circuit, wherein the power supply circuit comprises an access end LB _ V +, an access end V-, and an access end HB _ V +, the three access ends are respectively connected in series with an inductor L1, an inductor L4 and an inductor L8 to form a differential mode, the access end LB _ V +, the access end V-are sequentially connected in parallel with a common mode inductor L3, a transient voltage suppression diode TVS1 and an LC filter circuit to finally output a working voltage VCC, the access end HB _ V + is connected with a G end of a switch tube Q6 after being connected with a diode D4 and a resistor R43, and the switch tube Q6 is used for controlling the connection and disconnection of an access end LED to the ground; the input end of the voltage drop circuit is connected with the common voltage VCC and outputs the working voltage + 5V; the control circuit comprises a controller U3, the controller U3 monitors the current value of a thermistor HB _ NTC in a high beam circuit and a thermistor LB _ NTC in a low beam circuit and outputs the control of the G end of a switch tube Q6; the high-beam lamp circuit comprises a high-beam lamp set LED2, the positive pole end of the high-beam lamp set LED2 is connected with the access end LED-, and the negative pole end of the high-beam lamp set LED2 is connected with the access end HB _ H-; the dipped headlight circuit comprises a dipped headlight group LED1, the positive pole end of the dipped headlight group LED1 is connected with the access end LED +, and the negative pole end is connected with the access end LED-; the control circuit comprises a controller U1, the working voltage VCC controls the output of the input end LED + through a switch tube Q1, and the controller U1 controls the output of the G end of the switch tube Q1. A filter circuit and a diode D5 are connected in series between the working voltage VCC and the switching tube Q1, the filter circuit comprises an inductor L10 and capacitors C20, C23, C24, C25, C26 and C27, and a diode D5 is connected in parallel with a capacitor 18 and a resistor R5; an iron core inductor L9 is also connected in series between the switching tube Q1 and the access end LED +. The output of the controller U3 realizes the control of the G end of the switching tube Q6 through the switching tube Q5, the switching tube Q4 and the switching tube Q8; the output end of the controller U3 controls the G end of the switch tube Q5, the conduction of the switch tube Q5 controls the conduction of the switch tube Q4, and the conduction of the switch tube Q4 controls the conduction of the switch tube Q8. And a transient voltage suppression diode TVS2 is connected in parallel behind the access end HB _ V + and the access end V-in series inductor.
The utility model discloses a theory of operation: the power supply circuit processes the automobile storage battery and then outputs working voltage VCC, and the voltage drop circuit drops the working voltage VCC and outputs the working voltage + 5V; the control circuit controls the input end LED + according to the operation input instruction output to realize the switching control of the far and near light; meanwhile, when the high beam and the low beam work, the temperature control circuit monitors the current values of the thermistor HB _ NTC in the high beam circuit and the thermistor LB _ NTC in the low beam circuit and outputs control to the access end LED-. Generally speaking, the circuit scheme has strong reliability and stability, and has a reliable temperature control function, a stable current and voltage output function and a reliable far and near light switching function.
The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.
Claims (4)
1. A drive circuit of a near-far headlight is characterized in that: the power circuit comprises an access end LB _ V +, an access end V-, and an access end HB _ V +, the three access ends are respectively connected with an inductor L1, an inductor L4 and an inductor L8 in series to form a differential mode, the access end LB _ V + and the access end V-are sequentially connected with a common mode inductor L3, a transient voltage suppression diode TVS1 and an LC filter circuit in parallel and finally output a working voltage VCC, the access end HB _ V + is connected with a diode D4 and a resistor R43 in series and then connected with a G end of a switch tube Q6, and the switch tube Q6 is used for controlling the connection and disconnection of an access end LED to the ground; the input end of the voltage drop circuit is connected with a working voltage VCC and outputs a working voltage + 5V; the control circuit comprises a controller U3, the controller U3 monitors the current value of a thermistor HB _ NTC in a high beam circuit and a thermistor LB _ NTC in a low beam circuit and outputs the control of the G end of a switch tube Q6; the high-beam lamp circuit comprises a high-beam lamp set LED2, the positive pole end of the high-beam lamp set LED2 is connected with the access end LED-, and the negative pole end of the high-beam lamp set LED2 is connected with the access end HB _ H-; the dipped headlight circuit comprises a dipped headlight group LED1, the positive pole end of the dipped headlight group LED1 is connected with the access end LED +, and the negative pole end is connected with the access end LED-; the control circuit comprises a controller U1, the working voltage VCC controls the output of the input end LED + through a switch tube Q1, and the controller U1 controls the output of the G end of the switch tube Q1.
2. A driving circuit of a headlight for a vehicle according to claim 1, wherein: a filter circuit and a diode D5 are connected in series between the working voltage VCC and the switching tube Q1, the filter circuit comprises an inductor L10 and capacitors C20, C23, C24, C25, C26 and C27, and a diode D5 is connected in parallel with a capacitor 18 and a resistor R5; an iron core inductor L9 is also connected in series between the switching tube Q1 and the access end LED +.
3. A driving circuit of a headlight for a vehicle according to claim 1, wherein: the output of the controller U3 realizes the control of the G end of the switching tube Q6 through the switching tube Q5, the switching tube Q4 and the switching tube Q8; the output end of the controller U3 controls the G end of the switch tube Q5, the conduction of the switch tube Q5 controls the conduction of the switch tube Q4, and the conduction of the switch tube Q4 controls the conduction of the switch tube Q8.
4. A driving circuit of a headlight for a vehicle according to claim 1, wherein: and a transient voltage suppression diode TVS2 is connected in parallel behind the access end HB _ V + and the access end V-in series inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921786745.XU CN211335736U (en) | 2019-10-23 | 2019-10-23 | Driving circuit of far and near headlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921786745.XU CN211335736U (en) | 2019-10-23 | 2019-10-23 | Driving circuit of far and near headlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211335736U true CN211335736U (en) | 2020-08-25 |
Family
ID=72094995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921786745.XU Active CN211335736U (en) | 2019-10-23 | 2019-10-23 | Driving circuit of far and near headlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211335736U (en) |
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2019
- 2019-10-23 CN CN201921786745.XU patent/CN211335736U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240723 Address after: Room 701, Building 2, No. 10 Hexi 1st Road, Dongkeng Yanhe, Dongkeng Town, Dongguan City, Guangdong Province 523000 Patentee after: LUMENHUB LIGHTING Co.,Ltd. Country or region after: China Address before: 523000 B18, Xicheng Industrial Zone 2, Hengli Town, Dongguan City, Guangdong Province Patentee before: BRTECH LIGHTING (DONGGUAN) Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |