High and low beam band corner lamp switching circuit

Abstract

The utility model discloses a high and low beam band corner lamp switching circuit, and relates to the technical field of light circuits. Comprising a low beam LED 1, a high beam LED 2 and a corner lamp LED 3, and the VCC end of a power source, the low beam LED 1, the high beam LED 2 and the corner lamp LED 3 are sequentially connected in series. The outer side of the high beam LED 2 is connected with an MOS tube Q4A in parallel, and the outer side of the corner lamp LED 3 is connected with an MOS tube Q4 in parallel. According to the circuit provided by the utility model, the corner lamps are connected in series into the high-beam and low-beam LED lamp bead strings, and then the turn-on and turn-off of the corner lamps are selected by controlling the logic relationship of the corner lamps; when a passing light signal comes, if the corner lamp does not need to be turned on, the corner lamp is shielded through the passing light signal, the MOS tube Q4 is conducted, the corner lamp is short-circuited, and the corner lamp is not turned on; when a corner lamp signal comes, the MOS tube Q4 is disconnected through the corner lamp signal, and the corner lamp is lightened; the corner lamp is integrated into the far and near light circuit, and the corner lamp is driven by the headlamp drive, so that the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a light circuit technical field, concretely is a kind of high-low beam angle lamp switching circuit. BACKGROUND

[0002] Car light is generally divided into headlamp, tail light, turn signal light etc.;Headlamp is in the front of car, mainly illuminating and signal function. Headlamp can be divided into low beam, high beam, front turn signal, front position lamp (wide indicator), front fog lamp according to function. In addition, the car light also includes corner lamp, and the corner lamp provides auxiliary lighting for the road corner near the vehicle or provides auxiliary lighting for the side or rear of the vehicle. When the road environment lighting condition is insufficient, the corner lamp plays a certain auxiliary lighting role, which provides protection for driving safety.

[0003] The circuit connection of corner lamp has corresponding requirements in ECE R48, GB / T 30511-2014 and SAE J852 standards: only when the high beam or the low beam is turned on, the corner lamp can be turned on;For the corner lamp on one side of the vehicle, only when the turn signal on the same side of the vehicle is turned on or the steering angle is changed from the straight position to the same side of the vehicle, the corner lamp on the same side of the vehicle can be automatically turned on. When the turn signal is turned off and / or the steering angle has returned to the straight position, the corner lamp should be automatically turned off.

[0004] In the prior art, if the corner lamp function is added, a set of driving circuit is added to drive the corner lamp LED separately, which greatly increases the cost. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of high-low beam angle lamp switching circuit to solve the problems raised in the above background.

[0006] To solve the above technical problems, the utility model provides the following technical scheme:

[0007] A kind of high-low beam angle lamp switching circuit, including low beam LED1, high beam LED2 and corner lamp LED3, the VCC end of power supply, low beam LED1, high beam LED2 and corner lamp LED3 are in series successively;

[0008] The outer side of high beam LED2 is connected with MOS tube Q4A in parallel, and the outer side of corner lamp LED3 is connected with MOS tube Q4 in parallel;

[0009] It further includes low beam signal LB2 and corner lamp signal JD, the low beam signal LB2, diode D7, resistance R31, resistance R8, the gate of MOS tube Q4 are in series successively;

[0010] The corner lamp signal JD, diode D9, resistor R34, and base of triode Q6 are connected in series; the collector of triode Q6 is electrically connected between resistor R31 and resistor R8; and the emitter of triode Q6 is grounded.

[0011] Preferably, the drain of MOS tube Q4 is electrically connected between high beam LED 2 and corner lamp LED 3; the drain of MOS tube Q4A is electrically connected between high beam LED 2 and low beam LED 1; the source of MOS tube Q4A is electrically connected between high beam LED 2 and corner lamp LED 3; and the source of MOS tube Q4 and corner lamp LED 3 are grounded.

[0012] Preferably, resistor R31 and resistor R8 are externally connected with resistor R17, diode D8, and capacitor C24; resistor R17, diode D8, and capacitor C24 are grounded respectively.

[0013] Resistor R34 and base of triode Q6 are externally connected with resistor R42 and capacitor C27; resistor R42 and capacitor C27 are grounded respectively.

[0014] Resistor R34 and base of triode Q6 are externally connected with resistor R42 and capacitor C27; resistor R42 and capacitor C27 are grounded respectively.

[0015] Preferably, the circuit further comprises low beam signal LB1 and high beam signal HB,

[0016] The low beam signal LB1, diode D7A, resistor R13A, resistor R14A, and gate of MOS tube Q4 are connected in series;

[0017] The high beam signal HB, diode D9A, resistor R22A, and base of triode Q6A are connected in series.

[0018] The collector of triode Q6A is electrically connected between resistor R13A and resistor R14A; the emitter of triode Q6A is electrically connected with the source of MOS tube Q4A through resistor R4; resistor R6 and resistor R52 are connected in parallel on the outside of resistor R4; and resistor R6 and resistor R52 are connected in parallel.

[0019] Preferably, the drain of MOS tube Q4A and low beam LED 1 are externally connected with capacitor C30; and capacitor C30 is grounded.

[0020] The resistance R13A and the resistance R14A are externally connected with the resistance R17A, the diode D8A and the capacitor C24A, and the collector of the triode Q5A, the resistance R17A, the diode D8A and the capacitor C24A are grounded respectively, the base of the triode Q5A is connected with the source of the MOS tube Q4A in series through the resistance R13B, and the resistance R18 is connected in series between the emitter of the triode Q5A and the base of the triode Q5A, and the resistance R18 is grounded.

[0021] Preferably, the resistance R22A and the base of the triode Q6A are externally connected with the resistance R23A and the capacitor C27A, and the resistance R23A and the capacitor C27A are grounded respectively.

[0022] Compared with the prior art, the utility model has the advantages of:

[0023] The circuit in the utility model, according to the characteristics that corner lamp LED3 is bright and low beam LED1 is always bright, the corner lamp LED3 is connected in series into the high-low beam LED lamp bead string, then the corner lamp LED3 is selected to be bright or not through the logic relationship of the control of the corner lamp LED3, when the low beam signal LB1 and LB2 come, if the corner lamp LED3 does not need to be bright, the corner lamp LED3 is shielded through the low beam signal LB1 and LB2, the MOS tube Q4 is turned on, the corner lamp LED3 is short-circuited, and the corner lamp LED3 is not bright, when the corner lamp signal JD comes, the MOS tube Q4 is disconnected through the corner lamp signal JD, and the corner lamp LED3 is lighted, through the integration of the corner lamp LED3 into the high-low beam circuit, the corner lamp LED3 function is driven by using the headlamp driving, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are used to provide further understanding of the utility model, and constitute a part of the specification, are used to explain the utility model together with the embodiments of the utility model, and do not constitute the limitation to the utility model.In the drawings:

[0025] Figure 1 It is the whole circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the range protected by the utility model.

[0027] As Figure 1The utility model provides technical scheme: a kind of low-beam angle lamp switching circuit, including low-beam LED1, high-beam LED2 and angle lamp LED3, the VCC end of power supply, low-beam LED1, high-beam LED2 and angle lamp LED3 are connected in series in proper order;High-beam LED2 outer side is connected with MOS tube Q4A in parallel, and angle lamp LED3 outer side is connected with MOS tube Q4 in parallel;It further includes low-beam signal LB2 and angle lamp signal JD, low-beam signal LB2, diode D7, resistance R31, resistance R8, the gate of MOS tube Q4 are connected in series in proper order;Angle lamp signal JD, diode D9, resistance R34, the base of triode Q6 are connected in series in proper order;The collector of triode Q6 is electrically connected between resistance R31 and resistance R8, and the emitter of triode Q6 is grounded;It further includes low-beam signal LB1 and high-beam signal HB, low-beam signal LB1, diode D7A, resistance R13A, resistance R14A, the gate of MOS tube Q4 are connected in series in proper order, and high-beam signal HB, diode D9A, resistance R22A, the base of triode Q6A are connected in series in proper order;The collector of triode Q6A is electrically connected between resistance R13A and resistance R14A, and the emitter of triode Q6A is electrically connected with the source of MOS tube Q4A by resistance R4, resistance R6 and resistance R52 are connected in parallel in the outer side of resistance R4, and resistance R6 and resistance R52 are connected in parallel.

[0028] The drain of MOS tube Q4 is electrically connected between high-beam LED2 and angle lamp LED3, the drain of MOS tube Q4A is electrically connected between high-beam LED2 and low-beam LED1, the source of MOS tube Q4A is electrically connected between high-beam LED2 and angle lamp LED3, and the source of MOS tube Q4 and angle lamp LED3 are grounded.

[0029] Resistance R17, diode D8 and capacitor C24 are connected between resistance R31 and resistance R8, and resistance R17, diode D8 and capacitor C24 are grounded respectively;Resistance R42 and capacitor C27 are connected between resistance R34 and the base of triode Q6, and resistance R42 and capacitor C27 are grounded respectively;Resistance R54, capacitor C43 and diode TVS3 are connected between angle lamp signal JD and diode D9, resistance R54, capacitor C43 and diode TVS3 are connected in parallel, and resistance R54, capacitor C43 and diode TVS3 are grounded.

[0030] The resistance R13A and the resistance R14A are externally connected with the resistance R17A, the diode D8A and the capacitor C24A, and the collector of the triode Q5A, the resistance R17A, the diode D8A and the capacitor C24A are grounded respectively, the base of the triode Q5A is connected with the source of the MOS tube Q4A in series through the resistance R13B, the resistance R18 is connected in series between the emitter of the triode Q5A and the base of the triode Q5A, and the resistance R18 is grounded.

[0031] The resistance R22A and the base of the triode Q6A are externally connected with the resistance R23A and the capacitor C27A, and the resistance R23A and the capacitor C27A are grounded respectively.

[0032] Specific working principle:

[0033] According to the characteristics that the corner lamp LED3 is bright and the low beam LED1 is always bright, the corner lamp LED3 is connected in series into the high-low beam LED lamp bead string, and then the logic relationship of the corner lamp LED3 is controlled to select the bright and dark of the corner lamp LED3.

[0034] By integrating the corner lamp LED3 into the high-low beam circuit, the corner lamp LED3 function is driven by using the headlamp driving, and the cost is reduced.

[0035] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and not for limiting the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A high-beam and low-beam corner light switching circuit, comprising a low-beam LED 1, a high-beam LED 2, and a corner light LED 3, characterized in that: The VCC terminal of the power supply, low beam LED1, high beam LED2 and corner light LED3 are connected in series in sequence; The outer side of the high beam LED2 is connected in parallel with a MOS tube Q4A, and the outer side of the corner light LED3 is connected in parallel with a MOS tube Q4; It also includes a low beam signal LB2 and a corner light signal JD, wherein the low beam signal LB2, a diode D7, a resistor R31, a resistor R8, and a gate of the MOS transistor Q4 are connected in series in sequence; The corner light signal JD, diode D9, resistor R34, and base of transistor Q6 are connected in series in sequence; the collector of transistor Q6 is electrically connected between resistor R31 and resistor R8, and the emitter of transistor Q6 is grounded.

2. The high and low beam corner light switching circuit according to claim 1, characterized in that: The drain of the MOS tube Q4 is electrically connected between the high beam LED2 and the corner light LED3, the drain of the MOS tube Q4A is electrically connected between the high beam LED2 and the low beam LED1, the source of the MOS tube Q4A is electrically connected between the high beam LED2 and the corner light LED3, and the source of the MOS tube Q4 and the corner light LED3 are grounded.

3. The high and low beam corner light switching circuit according to claim 1, characterized in that: An external resistor R17, a diode D8 and a capacitor C24 are connected between the resistor R31 and the resistor R8, and the resistor R17, the diode D8 and the capacitor C24 are grounded respectively; An external resistor R42 and a capacitor C27 are connected between the resistor R34 and the base of the transistor Q6, and the resistor R42 and the capacitor C27 are grounded respectively; A resistor R54, a capacitor C43 and a diode TVS3 are externally connected between the corner light signal JD and the diode D9. The resistor R54, the capacitor C43 and the diode TVS3 are connected in parallel, and the resistor R54, the capacitor C43 and the diode TVS3 are all grounded.

4. The high and low beam corner light switching circuit according to claim 2, characterized in that: Also includes low beam signal LB1 and high beam signal HB, The low beam signal LB1, diode D7A, resistor R13A, resistor R14A, and gate of MOS tube Q4 are connected in series in sequence. The high beam signal HB, diode D9A, resistor R22A, and base of transistor Q6A are connected in series in sequence; The collector of the transistor Q6A is electrically connected between the resistor R13A and the resistor R14A. The emitter of the transistor Q6A is electrically connected to the source of the MOS transistor Q4A through the resistor R4. The resistor R6 and the resistor R52 are connected in parallel to the outside of the resistor R4. The resistor R6 and the resistor R52 are connected in parallel.

5. The high and low beam corner light switching circuit according to claim 4, characterized in that: An external capacitor C30 is connected between the drain of the MOS tube Q4A and the low-beam LED1, and the capacitor C30 is grounded; The resistance R13A and the resistance R14A between the outer resistance R17A, diode D8A, capacitor C24A and the collector of the triode Q5A, the resistance R17A, diode D8A, capacitor C24A are respectively handled as ground, the base of the triode Q5A is connected with the source of the MOS tube Q4A in series through the resistance R13B, the resistance R18 is connected in series between the emitter of the triode Q5A and the base of the triode Q5A, and the resistance R18 is handled as ground.

6. The high beam and low beam switching circuit according to claim 4, characterized in that: The resistance R22A and the base of the triode Q6A are connected with the resistance R23A and capacitor C27A in series, and the resistance R23A and capacitor C27A are respectively handled as ground.

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