Rear combination lamp control system, rear combination lamp and vehicle with rear combination lamp

Abstract

The utility model relates to the technical field of automobile lamps, in particular to a rear combination lamp control system, a rear combination lamp and a vehicle with the rear combination lamp. The control system comprises a power supply module, a rear fog lamp, a reversing lamp and a position lamp. The rear fog lamp, the reversing lamp and the position lamp are all connected with the power supply module; each of the rear fog lamp and the backup lamp comprises a protection module, a first driving module and a first LED light-emitting module, the power supply module and the first driving module are connected with the protection module, and the first driving module is further connected with the first LED light-emitting module; the position lamp comprises a linear power supply module, a voltage reduction module, a position lamp control module, a second driving module and a second LED light emitting module, the linear power supply module and the voltage reduction module are both connected with the power supply module, and the linear power supply module and the voltage reduction module are both connected with the position lamp control module; the position lamp control module, the voltage reduction module and the second LED light-emitting module are all connected with the second driving module. The rear combination lamp is good in driving capability, simple in structure and low in implementation cost, and the performance of the rear combination lamp is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lamps, in particular to a rear combination lamp control system, a rear combination lamp and a vehicle thereof. Background Art

[0002] In vehicle lighting technology, the rear combination lamp is one of the rear lamps of the car, which mainly plays the role of lighting and reminding the corresponding driver and pedestrians in night driving mode. Generally, the rear combination lamp control system of the vehicle lamp is designed according to the functions and lighting effects it needs to have. The design may be that the rear lamp controller at the rear of the vehicle supplies power to the lamp end of each function, or the lamp end may design a linear circuit according to different functional requirements. The existing design of the rear combination lamp control system has the following disadvantages:

[0003] 1) If the channel of the lamp controller at the rear of the vehicle is powered, when the ambient temperature rises, the operating temperature of the controller will rise accordingly, and the ability to drive the rear combination lamp will decrease, which will affect the performance of the rear combination lamp.

[0004] 2) If a linear circuit design is used, a chip-based driving solution will be adopted, and the LED light-emitting module will be set according to different functions. If the number of LEDs in the LED light-emitting module is large, the number of corresponding driving chips will increase accordingly, which will lead to high implementation costs of the rear combination lamp.

[0005] 3) If it is a nonlinear circuit design, a switching power supply solution is adopted. The switching power supply solution integrates more peripheral circuits. In order to improve the efficiency of the entire circuit, the selection of inductors, Schottky and MOS tubes in the peripheral circuits is expensive, and the implementation cost is high. Utility Model Content

[0006] The technical problem to be solved by the utility model is: in order to solve the problems of poor driving ability and high implementation cost of the existing rear combination lamp control system, the utility model provides a rear combination lamp control system with good driving ability of the rear combination lamp, simple structure, low implementation cost, and improved performance of the rear combination lamp.

[0007] The technical solution adopted by the utility model to solve the technical problem is: a rear combination lamp control system, including: a power supply module, a rear fog lamp, a reversing lamp and a position lamp;

[0008] The rear fog lamp, the reversing lamp and the position lamp are all connected to the power supply module;

[0009] The rear fog lamp and the reversing lamp both include a protection module, a first driving module and a first LED light-emitting module, the power supply module and the first driving module are both connected to the protection module, and the first driving module is also connected to the first LED light-emitting module;

[0010] The position light includes a linear power supply module, a step-down module, a position light control module, a second driving module and a second LED light-emitting module. The linear power supply module and the step-down module are both connected to the power supply module, the linear power supply module and the step-down module are both connected to the position light control module, and the position light control module, the step-down module and the second LED light-emitting module are all connected to the second driving module.

[0011] Further, specifically, the position light further comprises: a position light function detection module and a position light fault detection module;

[0012] The power supply module and the position light control module are both connected to the position light function detection module;

[0013] The position light control module and the second driving module are both connected to the position light fault detection module.

[0014] Further, specifically, the reversing lamp further includes an undervoltage module, one end of the undervoltage module is connected to the protection module, and the other end of the undervoltage module is connected to the first driving module.

[0015] Further, specifically, the protection module adopts a first anti-reverse connection circuit, and the first driving module adopts a transistor driving circuit.

[0016] Further, specifically, the step-down module includes: an anti-interference circuit, a second anti-reverse connection circuit, a signal control circuit, a power supply filter circuit, a step-down circuit and an output topology circuit;

[0017] The power supply module and the second anti-reverse connection circuit are both connected to the anti-interference circuit, the anti-reverse connection circuit and the power supply filter circuit are both connected to the signal control circuit, and the power supply filter circuit and the output topology circuit are both connected to the step-down circuit.

[0018] Further, specifically, the second driving module includes at least one driving chip.

[0019] A rear combination lamp comprises the rear combination lamp control system as described above.

[0020] A vehicle comprises the rear combination lamp as described above.

[0021] The beneficial effects of the utility model are:

[0022] (1) The rear combination lamp control system of the utility model controls the functions of the rear fog lamp, the reverse lamp and the position lamp in the rear combination lamp separately without affecting each other. The rear combination lamp has good driving ability, simple structure and low implementation cost, thereby improving the performance of the rear combination lamp.

[0023] (2) The position lamp in the rear combination lamp control system of the utility model uses a combination of nonlinear and linear solutions to reduce power loss and further improve the performance of the rear combination lamp;

[0024] (3) The rear fog lamp and the reversing lamp in the rear combination lamp control system of the utility model adopt a discrete component driving solution, which further reduces the implementation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.

[0027] Figure 2 It is a schematic diagram of the structure of the position lamp of the first embodiment of the utility model.

[0028] Figure 3 It is a schematic diagram of the structure of the reversing lamp of the first embodiment of the utility model.

[0029] Figure 4 This is a schematic diagram of a rear fog lamp circuit in Embodiment 1 of the present utility model.

[0030] Figure 5 This is a schematic diagram of a reversing light circuit according to Embodiment 1 of the present utility model.

[0031] Figure 6 This is a circuit schematic diagram of a linear power supply module according to Embodiment 1 of the present utility model.

[0032] Figure 7 This is a schematic diagram of a step-down module circuit in Embodiment 1 of the present utility model.

[0033] Figure 8 This is a circuit schematic diagram of a position light control module according to Embodiment 1 of the present utility model.

[0034] Fig. 9 This is a circuit schematic diagram of a position function detection module according to the first embodiment of the utility model.

[0035] Fig.10 This is a circuit schematic diagram of the second driving module of the first embodiment of the utility model.

[0036] Fig.11 This is a circuit schematic diagram of the second LED light-emitting module of the first embodiment of the utility model.

[0037] Fig.12 This is a circuit schematic diagram of a position light fault detection module according to Embodiment 1 of the present utility model.

[0038] In the figure, 1 is a power supply module; 2 is a rear fog lamp; 3 is a reversing lamp; 4 is a position lamp; 31 is an undervoltage module; 51 is a protection module; 52 is a first driving module; 53 is a first LED light-emitting module; 41 is a linear power supply module; 42 is a buck module; 43 is a position lamp control module; 44 is a second driving module; 45 is a second LED light-emitting module; 46 is a position lamp function detection module; 47 is a position lamp fault detection module; 421 is an anti-interference circuit; 422 is a second anti-reverse connection circuit; 423 is a signal control circuit; 424 is a power supply filter circuit; 425 is a buck circuit; 426 is an output topology circuit. DETAILED DESCRIPTION

[0039] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0040] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example 1

[0043] like Figure 1 As shown, it is the best embodiment of the utility model, a rear combination lamp control system, comprising: a power supply module 1, a rear fog lamp 2, a reversing lamp 3 and a position lamp 4;

[0044] The rear fog lamp 2, the reversing lamp 3 and the position lamp 4 are all connected to the power supply module 1, and the power supply module 1 is used to provide power signals to the rear fog lamp 2, the reversing lamp 3 and the position lamp 4;

[0045] The rear fog lamp 2 and the reversing lamp 3 both include a protection module 51, a first driving module 52 and a first LED light-emitting module 53. The power supply module 1 and the first driving module 52 are both connected to the protection module 51. The first driving module 52 is also connected to the first LED light-emitting module 53. The input power signal is protected by the protection module 51 and then transmitted to the first driving module 52. The first driving module 52 receives the input power signal and drives the first LED light-emitting module 53 to start working, thereby lighting up the rear fog lamp 2 or the reversing lamp 3.

[0046] The position light 4 includes a linear power module 41, a voltage reduction module 42, a position light control module 43, a second driving module 44 and a second LED light module 45. The linear power module 41 and the voltage reduction module 42 are both connected to the power supply module 1, and the linear power module 41 and the voltage reduction module 42 are both connected to the position light control module 43. The position light control module 43, the voltage reduction module 42 and the second LED light module 45 are all connected to the second driving module 44. The input power signal is converted by the linear power module 41, and the converted power signal provides a working voltage for the position light control module 43; the position light control module 43 controls the voltage reduction module 42, and the input power signal is voltage-reduced by the voltage reduction module 42 to provide a working voltage for the second LED light module 45 of the position light 4. The position light control module 43 transmits a control signal to the second driving module 44, and then drives the second LED light module 45 to start working through the second driving module 44, and lights up the position light 4. The position light control module 43 can also realize dimming control of the position light 4.

[0047] like Figure 2 As shown, the position light 4 also includes: a position light function detection module 46 and a position light fault detection module 47; the power supply module 1 and the position light control module 43 are both connected to the position light function detection module 46, the power supply module 1 is used to provide a power signal to the position light function detection module 46, when the position light function detection module 46 detects that the input voltage of the position light 4 is greater than a preset value, the position light 4 turn-on signal is transmitted to the position light control module 43, the position light control module 43 controls the step-down module 42 to work, and provides the second LED light-emitting module 45 with a working voltage; otherwise, no signal is transmitted to the position light control module 43.

[0048] The position light control module 43 and the second drive module 44 are both connected to the position light fault detection module 47. The fault signal is fed back to the position light fault detection module 47 through the second drive module 44. The fault detection module transmits the fault signal to the position light control module 43. The position light control module 43 controls other position lights 4 to turn off.

[0049] The rear fog lamp 2 or the reversing lamp 3 also includes an undervoltage module 31. One end of the undervoltage module 31 is connected to the protection module 51, and the other end of the undervoltage module 31 is connected to the first driving module 52, so as to realize undervoltage protection of the input power signal after being protected by the protection module 51, and further improve the safety of the circuit. In actual application, the reversing lamp is used more frequently. In order to reduce the system cost, the undervoltage module can be set only on the reversing lamp 3. Figure 3 shown.

[0050] The rear fog lamp 2 or the reversing lamp 3 protection module 51 adopts the first anti-reverse connection circuit, but is not limited to this. Figure 4 As shown, the first anti-reverse connection circuit includes a transient suppression diode FT1, a capacitor FC7, a capacitor FC6, and a diode FD1; the suppression diode FT1, the other end of the capacitor FC7 and the capacitor FC6 are connected in parallel, one end after connection and the anode of the diode FD1 are connected to the power supply module 1, and the other end after connection is connected to the common ground. FC7 is a large capacitor, FC6 is a small capacitor, and FD1 is an anti-reverse connection diode, which plays a role in short-circuit protection of the input power signal.

[0051] The first driving module 52 adopts a transistor driving circuit, which includes a diode FD2, a resistor FR1, a resistor FR5, a resistor FR9, a resistor FR10, a resistor FR2, a resistor FR11, a resistor FR3, a resistor FR12, a resistor FR4, a resistor FR8, a resistor FR13, a transistor FQ1, a transistor FQ2, a transistor FQ3, a capacitor FC8, a capacitor FC5, a capacitor FC11 and a capacitor FC10; the resistor FR1 and the resistor FR7 are connected in series, one end of which is connected to the cathode of the diode FD1, and the other end of which is connected to one end of the resistor FR5; the capacitor FC8 and the diode FD2 are connected in parallel, one end of which is connected to one end of the resistor FR5, and the other end is connected to the common ground; the other end of the resistor FR5 and one end of the capacitor FC5 are both connected to the base of the transistor FQ1; one end of the resistor FR9 is connected to one end of the capacitor FC5, and the other end of the resistor FR9 is connected to the common ground. One end of capacitor FC11 is connected to the base of transistor FQ2, one end of resistor FR10 is connected to one end of capacitor FC5, the other end of resistor FR10 and one end of capacitor FC10 are connected to the base of transistor FQ3, the other end of capacitor FC5, the other end of capacitor FC11 and the other end of capacitor FC10 are connected to the common ground, the collector of transistor FQ1, the collector of transistor FQ2 and the collector of transistor FQ3 are connected to LED light-emitting module 53, resistor FR2 and resistor FR11 are connected in parallel, one end after connection is connected to the emitter of transistor FQ1, and the other end is connected to the common ground; resistor FR3 and resistor FR12 are connected in parallel, one end after connection is connected to the emitter of transistor FQ2, and the other end is connected to the common ground; resistor FR4, resistor FR8 and resistor FR13 are connected in parallel, one end after connection is connected to the emitter of transistor FQ3, and the other end is connected to the common ground.

[0052] Among them, capacitor FC5 is the base filter capacitor of transistor FQ1, capacitor FC11 is the base filter capacitor of transistor FQ2, and capacitor FC10 is the base filter capacitor of FQ3. The purpose is to provide a filter loop on the line when the relative positions of transistors FQ1, FQ2 and FQ3 are far apart during PCBLAYOUT design, reduce the loss interference caused by long wiring, and improve the stability of the circuit. Diode FD2 is the base bias diode of transistor FQ1, which provides a stable base voltage to ensure the forward bias of the emitter junction of transistor FQ1. Resistors FR5, FR9 and FR10 are balancing resistors of the corresponding transistors to ensure the consistency of the base potential of the transistors. Resistors FR2 and FR11 adjust the emitter current of FQ1, resistors FR3 and FR12 adjust the emitter current of transistor FQ2, and resistors FR4, FR8 and FR13 adjust the emitter current of transistor FQ3. The sum of the currents of the three transistors is the current signal of each LED lamp bead on the LED light emitting module 53 .

[0053] like Figure 4 As shown, the first driving module 52 of the rear fog lamp 2 further includes an RC filter circuit. The RC filter circuit includes a capacitor FC4 and a resistor FR6. The capacitor FC4 and the resistor FR6 form an RC parallel filter to improve the reliability of the fog lamp transmission signal.

[0054] like Figure 5 As shown, the undervoltage module 31 of the reversing lamp 3 includes: a voltage regulator tube ZD1, a resistor RR9, a resistor RR7, a resistor RR6, a resistor RR10, a resistor RR11, a capacitor RC5, a capacitor RC4, a transistor RQ4 and a MOS tube RQ5. The voltage regulator tube ZD1 and the resistor RR9 are connected in series, one end of the connection, one end of the resistor RR6 and one end of the capacitor RC4 are all connected to the output end of the anti-reverse connection circuit, and the other end, one end of the resistor RR7 and one end of the capacitor RC5 are all connected to the base of the transistor RQ4 , one end of the resistor RR10 is connected to the emitter of the transistor RQ4, the other end of the resistor RR6, one end of the resistor RR11 and the gate of the MOS tube RQ5 are all connected to the collector of the transistor RQ4, the drain of the MOS tube RQ5 is connected to the LED light-emitting module 53 of the reversing lamp 3, the source of the MOS tube RQ5 is connected to the first driving module 52 of the reversing lamp 3, and the other end of the resistor RR7, the other end of the capacitor RC5, the other end of the resistor RR11 and the other end of the resistor RR10 are all connected to the common ground.

[0055] Among them, after the power supply signal input by the reversing light 3 passes through the protection circuit, when the input power supply signal is less than the stable voltage value 8.1V of the voltage regulator ZD1, the voltage regulator ZD1 is disconnected, the collector of the transistor RQ4 is connected to the input of the reversing light 3 through the resistor RR6, and the emitter is grounded through the resistor RR10, the transistor RQ4 is turned on, that is, the gate of the MOS tube RQ5 is at a low level, and the drain and source are cut off, then the switch is disconnected, and the LED light-emitting module 53 of the reversing light 3 is disconnected from the first driving module 52 of the reversing light 3, and the reversing light 3 is not lit. When the input power signal is greater than the stable voltage value 8.1V of the voltage regulator tube ZD1, the voltage regulator tube ZD1 enters the voltage regulation state to ensure that the voltage of the voltage regulator tube ZD1 is always 8.1V, the base of the transistor RQ4 is connected to the input of the position light 4 through the resistor RR9 and the voltage regulator tube ZD1, and the emitter is grounded through the resistor RR10. The transistor RQ4 is cut off, and the switch is turned on. At this time, the gate of the MOS tube RQ5 is a high-level MOS tube, and the drain and source of RQ5 are connected. The switch is closed to drive the LED light module 53 of the reversing light 3. The undervoltage protection function is set. When the power supply voltage fluctuates to a small voltage, it will not affect the components of the rear circuit of the reversing light, thereby improving the circuit stability and further improving the safety of the circuit.

[0056] like Figure 6 As shown, the linear power module 41 of the position lamp 4 includes a diode MD1, a resistor MR8, a resistor MR9, a capacitor MC15, a capacitor MC10, a capacitor MC20, a capacitor MC11, a capacitor MC12, a capacitor MC13, and a conversion chip MU2. The anode of the diode MD1 is connected to the power supply module 1. The resistor MR8, the capacitor MC15, the capacitor MC10 and the capacitor MC20 are connected in parallel. One end after connection and the 8th pin of the conversion chip MU2 are connected to the cathode of the diode MD1, and the other end is connected to the common ground. The resistor MR9, the capacitor MC11, the capacitor MC12 and the capacitor MC13 are connected in parallel. One end after connection is connected to the 1st pin of the conversion chip MU2, and the other end is connected to the common ground. The 2nd, 3rd, 4th, 5th, 6th and 7th pins of the conversion chip MU2 are also connected to the common ground. The 1st pin of the conversion chip MU2 is the output end of the linear power module.

[0057] Among them, the diode MD1 plays the role of conducting the forward voltage and cutting off the reverse voltage. Capacitors MC15, MC10 and MC20 are filter capacitors for the 8-pin VIN of the chip MU2, and the resistor MR8 plays the role of absorbing current. The 1-pin VOUT of MU2 converts the input voltage of the position light 4 into a 5V output. The capacitors MC11, MC12 and MC13 filter out low-frequency or high-frequency interference signals and improve the stability of the 5V voltage output. The resistor MR9 is the discharge resistor of the capacitor MC13, and forms a discharge loop with the capacitor MC13. When the capacitor is fully charged, the discharge speed is increased.

[0058] like Figure 7 As shown, the step-down module 42 includes: an anti-interference circuit 421, a second anti-reverse connection circuit 422, a signal control circuit 423, a power supply filter circuit 424, a step-down circuit 425 and an output topology circuit 426; the power supply module 1 and the second anti-reverse connection circuit 422 are both connected to the anti-interference circuit 421, the anti-reverse connection circuit and the power supply filter circuit 424 are both connected to the signal control circuit 423, and the power supply filter circuit 424 and the output topology circuit 426 are both connected to the step-down circuit 425.

[0059] The anti-interference circuit 421 includes: a transient suppression diode PT1, a capacitor PC54 and a capacitor PC55, which are connected in parallel, one end of which and the second anti-reverse connection circuit 422 are connected to the power supply module 1, and the other end of which is connected in parallel to the common ground. It can effectively suppress various clutter signal interferences on the input line of the position lamp 4.

[0060] The second reverse connection protection circuit 422 includes a reverse connection protection diode PD1, which plays a role in short-circuit protection of the input power signal.

[0061] The signal control circuit 423 includes: a MOS tube Q1, a capacitor C1, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a π-type filter circuit; the resistor R1 and the capacitor C1 are connected in parallel, one end of the connection and the drain of the MOS tube Q1 are connected to the second anti-reverse connection circuit 422, the other end of the connection and one end of the resistor R2 are connected to the gate of the MOS tube Q1, the other end of the resistor R2 is connected to the collector of the triode Q2, one end of the resistor R3 is connected to the position light control module 43, the other end and one end of the resistor R4 are connected to the base of the triode Q2, the other end of the resistor R4 is connected to the common ground, the capacitor C2 and the capacitor C3 are connected in parallel, and are connected to the source of the MOS tube Q1 after connection, and the other end is connected to the common ground. The MOS tube Q1 is a PMOS tube, the drain of the MOS tube Q1 is connected to the drain resistor R1 and the drain capacitor C1, and the bias voltage is provided for the drain, and the source is connected to the input capacitors C2 and C3 of the π-type filter circuit. Resistor R2 is the bias resistor of transistor Q2, providing a certain collector voltage, and the emitter of Q2 is grounded. When the position lamp 4 works normally, the current passes through the MOS tube Q1, the transistor Q2 does not work, and the capacitor C4 and the capacitor C5 are the output capacitors of the π-type filter circuit, which are connected to the power filter circuit 424.

[0062] The power supply filter circuit 424 includes capacitors C6, C7 and C8. The capacitors C6, C7 and C8 are connected in parallel, one end of which is connected to the step-down circuit 425, and the other end is connected to the common ground.

[0063] The buck circuit 425 includes a buck chip U1, a capacitor C10, a resistor R6 and a resistor R7; the power filter circuit 424 filters the input power signal and inputs it to pin 2 of the buck chip U1, which can reduce the volatility caused by the input voltage. The capacitor C10 is the processing capacitor of the VCC of the buck chip U15 pin, that is, the internal 5V output, which suppresses possible noise interference signals. The output voltage of the buck chip U1 is adjusted by selecting the resistance values ​​of the resistors R6 and R7. The output voltage of this circuit is set to 7.5V to meet the LED working voltage requirement for lighting the position light 4.

[0064] The output topology circuit 426 is composed of a plurality of capacitors connected in parallel, which are capacitor C13, capacitor C14, capacitor C15 and capacitor C16. Capacitor C13, capacitor C14, capacitor C15 and capacitor C16 are output capacitors of the buck module 42 topology.

[0065] like Figure 10-11As shown, the second driving module 44 includes at least one driving chip, and the number of driving chips is related to the number of LED lamp beads in the second LED light-emitting module 45. For example, the number of LED lamp beads in the second LED light-emitting module 45 is 33, and the number of driving chips is 2, which are driving chip PU1 and driving chip PU2 respectively. For further explanation, pins 6 and 7 of the position light 4 driving chip PU1 are connected, and after connection, they are connected to the step-down module 42. Capacitors PC34, PC35, and PC56 are power supply filter capacitors. Capacitors PC34, PC35 and PC56 are connected in parallel and connected to pin 6 of the driving chip PU1. Resistor PR1 is a current setting resistor for driving the LED. PC37 is a parallel filter capacitor. Resistor PR1 and capacitor PC37 are connected in parallel and connected to pin 12 of the driving chip PU1. Pins 1 and 4 of the driving chip PU1 communicate internally with pins 1 and 4 of the driving chip PU2 to ensure the consistency of the effect of the cascaded chip driving the position light 4. Pins 15 to 24 of driver chip PU1 are output pins, each of which drives three LED lamp beads in the second LED light-emitting module 45. Pin 2 of driver chip PU1 is the internal 5V output pin. Pin 5 of PU1 is an open circuit fault pin, which is connected to pin 5 of driver chip PU2. When one of the LED lamp beads of position lamp 4 is open circuit, it is connected to pin 5 of driver chip PU2 through pin 5 of driver chip PU1. Driver chip PU1 or PU2 will control the remaining position lamps 4 to turn off. Similarly, the pin configuration of driver chip PU2 is the same as that of driver chip PU1. The difference is that pins 19 to 14 of driver chip PU2 are connected together, and the maximum current of a single channel is 75mA. The six channels from pins 19 to 14 of driver chip PU2 are connected to drive the 450mA position lamp 4PL30. Since PL30 is a single LED, resistors PR7, PR8, PR9, PR10, and PR11 are connected in parallel and in series with diodes PD2, PD3, PD4, PD5, and PD6 to ensure that the LED output voltage of each channel of driver chip PU1 and driver chip PU2 remains the same. Pin 13 OUT6 to pin 14 OUT11 of driver chip PU2 are connected together to drive PL31, PL32, and PL33 of position light 4 at 450mA.

[0066] The first LED light-emitting module 53 and the second LED light-emitting module 45 both include a plurality of LED lamp beads. In the specific embodiment of the utility model, the first LED light-emitting module 53 includes 3 LED lamp beads, and the 3 LED lamp beads are connected in series; the second LED light-emitting module 45 includes 33 LED lamp beads, wherein every 3 LED lamp beads can be connected in series, and a capacitor is connected in parallel to each LED lamp bead to improve the anti-interference ability in the EMC experiment, but it is not limited to this, see Fig.11As shown, if the current of the selected LED lamp bead is large, a single LED lamp bead or two LED lamp beads can be connected to the corresponding driver chip.

[0067] like Figure 8 As shown, the position light control module 43 includes a control chip MU1 , and the model of the control chip MU1 is but not limited to KEA128.

[0068] like Fig. 9 As shown, the position light function detection module 46 includes a diode D1, a capacitor MC16, a capacitor MC14, a resistor MR5, a resistor MR6, a resistor MR10, a resistor MR11 and a voltage regulator MZ2. The anode of the diode D1 is connected to the power supply module 1, one end of the capacitor MC16 and one end of the resistor MR5 are both connected to the cathode of the diode, the resistor MR6, the capacitor MC14 and the voltage regulator MZ2 are connected in parallel, one end of the connection is connected to the other end of the resistor MR5, and the other end is connected to MR10 and MR11 connected in parallel, the cathode of the voltage regulator MZ2 is also connected to the PL-SIG end, and the PL-SIG end is also connected to the position light control module 43. The input power signal is protected against reverse connection by diode D1. The voltage regulator MZ2 is a 5.1V voltage regulator. When the input power signal of the position light 4 is greater than 5.1V, the voltage at the PL-SIG terminal is greater than 5.1V. The PL-SIG terminal is also connected to the position light control module 43. The high level of the position light control module 43 is valid, and the position light 4 is controlled to light up. Conversely, when the input power signal of the position light 4 is less than 5.1V, the voltage at the PL-SIG terminal is less than 5.1V, and the position light control module 43 cannot detect a high-level signal, and no signal is transmitted to the position light control module 43.

[0069] like Fig.12As shown, the position light fault detection module 47 includes a resistor PR12, a resistor PR13, a resistor PR14, a resistor PR16 and a MOS tube PQ1. One end of the resistor PR12 and one end of the resistor PR13 are connected to the linear power supply module 41, the other end of the resistor PR12 and one end of the resistor PR14 are connected to the driver chip of the second driver module 44, the other end of the resistor PR14 is connected to the gate of the MOS tube PQ1, the other end of the resistor FR13 and the drain of the MOS tube PQ1 are connected to the position light control module 43, one end of the resistor FR16 is connected to the drain of the MOS tube, and the other end is connected to the common ground. The total number of LEDs in the position light 4 is large. In terms of functional safety, the position light fault detection module 47 can further improve the safety of the control system. When the position light 4 works normally, the 5th pin of the driver chip of the second driver module 44 is low level, that is, the gate of the MOS tube PQ1 is low level, and the MOS tube PQ1 is disconnected. Pin 37 of the control chip MU1 is connected to the network PL fault IN. When an LED of the position light 4 is open-circuited, the driver chip will detect that the LED is open-circuited, and then the driver chip pin 5 ERR will be high, and the source of the MOS tube PQ1 will be grounded through the resistor PR16. At this time, the MOS tube PQ1 is turned on, that is, the switch is closed, and the pin 37 of the control chip MU1 detects that the signal is low-level. MU1 will not light up other position lights 4 based on the received low-level signal.

[0070] Example 2

[0071] A rear combination lamp comprises the above rear combination lamp control system.

[0072] Example 3

[0073] A vehicle comprises the above rear combination lamp.

[0074] In summary, in the rear combination lamp control system of the utility model, the functions of the rear fog lamp, the reversing lamp and the position lamp in the rear combination lamp are controlled separately without affecting each other, the rear combination lamp has good driving ability, simple structure, low implementation cost, and improved performance of the rear combination lamp; the position lamp uses a combination of nonlinear and linear solutions to reduce power loss and further improve the performance of the rear combination lamp; the rear fog lamp and the reversing lamp adopt a discrete component driving solution, which further reduces the implementation cost.

[0075] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rear combination lamp control system, characterized in that: include: A power supply module (1), a rear fog lamp (2), a reversing lamp (3) and a position lamp (4); The rear fog lamp (2), the reversing lamp (3) and the position lamp (4) are all connected to the power supply module (1); The rear fog lamp (2) and the reversing lamp (3) both comprise a protection module (51), a first drive module (52) and a first LED light-emitting module (53); the power supply module (1) and the first drive module (52) are both connected to the protection module (51); and the first drive module (52) is also connected to the first LED light-emitting module (53); The position light (4) comprises a linear power supply module (41), a voltage reduction module (42), a position light control module (43), a second drive module (44) and a second LED light-emitting module (45); the linear power supply module (41) and the voltage reduction module (42) are both connected to the power supply module (1); the linear power supply module (41) and the voltage reduction module (42) are both connected to the position light control module (43); the position light control module (43), the voltage reduction module (42) and the second LED light-emitting module (45) are all connected to the second drive module (44).

2. The rear combination lamp control system according to claim 1, characterized in that: The position light (4) further comprises: a position light function detection module (46) and a position light fault detection module (47); The power supply module (1) and the position light control module (43) are both connected to the position light function detection module (46); The position light control module (43) and the second drive module (44) are both connected to the position light fault detection module (47).

3. The rear combination lamp control system according to claim 1, characterized in that: The rear fog lamp (2) and the reversing lamp (3) further include an undervoltage module (31), one end of the undervoltage module (31) being connected to the protection module (51), and the other end of the undervoltage module (31) being connected to the first driving module (52).

4. The rear combination lamp control system according to claim 1, characterized in that: The protection module (51) adopts a first anti-reverse connection circuit, and the first drive module (52) adopts a triode drive circuit.

5. The rear combination lamp control system according to claim 1, characterized in that: The voltage reduction module (42) comprises: an anti-interference circuit (421), a second anti-reverse connection circuit (422), a signal control circuit (423), a power supply filter circuit (424), a voltage reduction circuit (425) and an output topology circuit (426); The power supply module (1) and the second anti-reverse connection circuit (422) are both connected to the anti-interference circuit (421), the anti-reverse connection circuit and the power supply filter circuit (424) are both connected to the signal control circuit (423), and the power supply filter circuit (424) and the output topology circuit (426) are both connected to the step-down circuit (425).

6. The rear combination lamp control system according to claim 1, characterized in that: The second driving module (44) includes at least one driving chip.

7. A rear combination lamp, characterized in that: It comprises the rear combination lamp control system as claimed in any one of claims 1 to 6.

8. A vehicle, characterized in that: Comprising the rear combination lamp as claimed in claim 7.

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