Fault feedback circuit of vehicle lamp, fault identification method and vehicle

Abstract

The embodiment of the invention relates to the technical field of vehicles, and discloses a vehicle lamp fault feedback circuit, a fault identification method and a vehicle, the circuit comprises a voltage acquisition unit, a power supply unit, a first resistor and at least one light module; the power supply unit is used for providing a first feedback voltage for the at least one fault feedback unit through the first resistor and supplying power to the at least one light unit; the at least one fault feedback unit is used for converting a first feedback voltage fed back to the voltage acquisition unit into a second feedback voltage corresponding to the target light unit with the fault when the corresponding light unit has the fault; the voltage acquisition unit is used for acquiring a second feedback voltage, and the second feedback voltage is used for determining target light units with faults or the number of the target light units with faults in the at least one light unit. According to the scheme, accurate detection and feedback of the vehicle lamp fault are realized, the faulted light unit can be quickly positioned, and the realization cost is relatively low.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of vehicles, and particularly to a fault feedback circuit for vehicle lights, a fault identification method, and a vehicle. Background Art

[0002] With the rapid development of vehicle technology, the vehicle industry is increasingly moving towards intelligence, electronics, and digitization. Many vehicle designs have also undergone significant reforms to enhance the user experience of vehicles, especially the fault identification design of vehicle lights.

[0003] In existing related technologies, flow chips are often used to drive lights, and thus it is possible to identify whether there is a fault in the lights. However, this method results in a huge increase in cost. Therefore, how to achieve low-cost and accurate fault detection of lights has become an urgent technical problem to be solved. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention provide a fault feedback circuit for vehicle lights, a fault identification method, and a vehicle, which are used to achieve low-cost and accurate fault detection of lights.

[0005] According to one aspect of the embodiments of the present invention, a fault feedback circuit for vehicle lights is provided.

[0006] The circuit includes: a voltage acquisition unit, a power supply unit, a first resistor disposed between the power supply unit and the voltage acquisition unit, and at least one light module connected between the power supply unit and the voltage acquisition unit; for each light module, the light module includes: a light unit and a fault feedback unit, and the fault feedback unit is respectively connected to the voltage acquisition unit, the power supply unit, and the light unit.

[0007] The power supply unit is configured to provide a first feedback voltage to the at least one fault feedback unit through the first resistor and supply power to the at least one light unit.

[0008] The at least one fault feedback unit is configured to, when the corresponding light unit fails, convert the first feedback voltage fed back to the voltage acquisition unit into a second feedback voltage corresponding to the target light unit with a fault.

[0009] The voltage acquisition unit is configured to acquire the second feedback voltage, and the second feedback voltage is used to determine the target light unit with a fault or the number of target light units with a fault in the at least one light unit.

[0010] According to another aspect of the embodiments of the present invention, a method for identifying faults in a vehicle lamp is provided, which is applied to a control unit for identifying the above-mentioned fault feedback circuit. The method includes:

[0011] Obtain a target feedback voltage acquired by the voltage acquisition unit in the fault feedback circuit;

[0012] According to the target feedback voltage, determine target lamp unit information indicating a fault in the fault feedback circuit from a mapping relationship. The mapping relationship records the corresponding relationship between at least one preset lamp unit information and the feedback voltage corresponding to the at least one lamp unit information. The feedback voltage is jointly determined based on a first resistor in the fault feedback circuit, a third resistor corresponding to at least one lamp unit with a fault in the lamp unit information corresponding to the feedback voltage, and the supply voltage of the power supply unit.

[0013] According to still another aspect of the embodiments of the present invention, a system for identifying faults in a vehicle lamp is provided. The system includes: the above-mentioned fault feedback circuit and the above-mentioned control unit.

[0014] According to still another aspect of the embodiments of the present invention, a vehicle is provided. The vehicle includes: the above-mentioned system for identifying faults in a vehicle lamp.

[0015] According to still another aspect of the embodiments of the present invention, a vehicle is provided. The vehicle includes: the above-mentioned fault feedback circuit.

[0016] According to still another aspect of the embodiments of the present invention, a device for identifying faults in a vehicle lamp is provided, which is applied to a control unit for identifying the above-mentioned fault feedback circuit. The device includes:

[0017] An acquisition module, configured to obtain a target feedback voltage acquired by the voltage acquisition unit in the fault feedback circuit;

[0018] A determination module, configured to determine target lamp unit information indicating a fault in the fault feedback circuit from a mapping relationship according to the target feedback voltage. The mapping relationship records the corresponding relationship between at least one preset lamp unit information and the feedback voltage corresponding to the at least one lamp unit information. The feedback voltage is jointly determined based on a first resistor in the fault feedback circuit, a third resistor corresponding to at least one lamp unit with a fault in the lamp unit information corresponding to the feedback voltage, and the supply voltage of the power supply unit.

[0019] According to still another aspect of the embodiments of the present invention, an electronic device is provided, including: a processor, a memory, a communication interface, and a communication bus. The processor, the memory, and the communication interface complete communication with each other through the communication bus;

[0020] The memory is used to store at least one executable instruction, and the executable instruction causes the processor to perform the operations of the method for identifying faults of the vehicle lamp as described above.

[0021] According to another aspect of the embodiments of the present invention, there is provided a computer-readable storage medium, in which at least one executable instruction is stored, and the executable instruction causes the vehicle lamp fault identification device / electronic device to perform the operations of the above-mentioned method.

[0022] According to another aspect of the embodiments of the present invention, there is provided a computer program product, characterized in that it includes a computer program, and when the computer program is executed by a processor, it causes the vehicle lamp fault identification device / electronic device to perform the operations of the above-mentioned method.

[0023] The vehicle lamp fault feedback circuit provided by the embodiments of the present invention, wherein the power supply unit provides a first feedback voltage for the fault feedback unit through a first resistor and supplies power to the lighting unit, constructing the basic energy supply of the circuit; when a fault occurs in the lighting unit, the fault feedback unit can convert the first feedback voltage fed back to the voltage acquisition unit side into a second feedback voltage, and this conversion becomes the key signal for fault detection; the voltage acquisition unit acquires the second feedback voltage and determines the target lighting unit with a fault or the number of target lighting units based on the second feedback voltage. So as to achieve precise detection and feedback of vehicle lamp faults, be able to quickly locate the faulty lighting unit, and can effectively identify whether it is a single or multiple lighting units with faults, providing strong support for timely maintenance and ensuring the normal operation of the vehicle lamp, and improving the reliability and safety of the vehicle lamp system.

[0024] The above description is only an overview of the technical solutions of the embodiments of the present invention. In order to be able to understand the technical means of the embodiments of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following specifically describes the embodiments of the present invention. Description of the Drawings

[0025] The drawings are only used to illustrate the embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0026] Figure 1 The fault feedback circuit provided for the prior art;

[0027] Figure 2 Shows the structural diagram of the first embodiment of the vehicle lamp fault feedback circuit provided by the present invention;

[0028] Figure 3 Shows the structural diagram of the second embodiment of the vehicle lamp fault feedback circuit provided by the present invention;

[0029] Figure 4 Shows a schematic flowchart of an embodiment of a method for identifying faults in a vehicle lamp provided by the present invention;

[0030] Figure 5 Shows a structural diagram of a third embodiment of a fault feedback circuit for a vehicle lamp provided by the present invention;

[0031] Figure 6 Shows a structural diagram of an embodiment of a fault identification system for a vehicle lamp provided by the present invention;

[0032] Figure 7 Shows a structural diagram of a first embodiment of a vehicle provided by the present invention;

[0033] Figure 8 Shows a structural diagram of a second embodiment of a vehicle provided by the present invention;

[0034] Figure 9 Shows a structural diagram of an embodiment of a fault identification device for a vehicle lamp provided by the present invention;

[0035] Figure 10 Shows a structural diagram of an embodiment of an electronic device provided by the present invention. Detailed implementation manners

[0036] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein.

[0037] With the rapid development of vehicle technology, the vehicle industry is increasingly moving towards intelligence, electronics, and digitization, and many vehicle designs have also undergone huge reforms. In recent years, vehicle lights have gradually changed from halogen lamps to LED light-emitting diodes, and now LED light-emitting diodes are equipped in high, medium, and low-end vehicles.

[0038] Regarding the fault detection technology for LED light-emitting diodes, in existing related implementations, there are the following two methods:

[0039] The first method is to use a flow chip as the driving chip for the LED light-emitting diode. Whether a single or multiple LED light-emitting diodes fail, the flow chip can identify them;

[0040] The second method is to use a dual-triode constant-current circuit to drive the LED light-emitting diode particles. The fault feedback signal of this circuit is in parallel form, and the feedback when a single or multiple LED light-emitting diodes are damaged is the same. Specifically, reference can be made to Figure 1 .

[0041] Figure 1The fault feedback circuit provided for the prior art is as follows Figure 1 As shown, the existing circuit includes a power supply, a resistor R1, multiple LEDs (taking 3 as an example), multiple dual-transistor constant current circuits 11 (taking 3 as an example), multiple diodes D (taking 3 as an example), and fault feedback.

[0042] In this implementation, the signals of the fault feedback are in parallel form, and the feedbacks shown by the damage of a single or multiple LED light-emitting diodes are the same.

[0043] That is, when one or more LED light-emitting diodes are damaged, the damage can be determined based on the signals of the fault feedback.

[0044] However, in the above two technologies, there are the following technical problems: The way of the flow-through chip can identify single or multiple ones, but the cost increases significantly; The way of using the dual-transistor constant current circuit to drive the LED light-emitting diode particles can perform fault inspection, but it cannot identify the fault of a single or multiple LED light-emitting diodes, let alone identify the specific faulty LED light-emitting diode.

[0045] Based on the above existing technical problems, the technical concept of the present invention is as follows: Considering the cost and feasibility, the second way above can be improved. In order to be able to identify the faulty lighting unit, a corresponding fault feedback unit can be set for each different lighting unit. If the fault feedback unit can change the fault feedback signal when the corresponding light fails, then the faulty light can be determined based on the fault feedback signal.

[0046] That is, the power supply unit provides a first feedback voltage for the fault feedback unit through a first resistor, which is the initial voltage signal of the circuit. Then, when the lighting unit fails, the fault feedback unit processes this initial voltage and converts it into a second feedback voltage different from the initial voltage. Since there is a fault feedback unit corresponding to the faulty lighting unit, during the fault, in fact, there is also a certain relationship between the second feedback voltage received by the voltage acquisition unit and the number of faulty lighting units, etc. In this way, the fault state of the lighting unit can be intuitively reflected in the form of voltage change, thus solving the above technical problems.

[0047] Next, the technical solution of the present invention will be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0048] The embodiments of the present invention will be described from the following three aspects, namely, the embodiment of the fault feedback circuit of the vehicle lamp, the embodiment of the fault identification method of the vehicle lamp, and other embodiments.

[0049] 1. Embodiment of the Fault Feedback Circuit of a Vehicle Headlamp

[0050] Figure 2 The structural diagram of the first embodiment of the fault feedback circuit of the vehicle headlamp provided by the present invention is shown. As Figure 2 shown, the fault feedback circuit of the vehicle headlamp includes: a voltage acquisition unit 21, a power supply unit 22, a first resistor 23 disposed between the power supply unit 22 and the voltage acquisition unit 21, and at least one lighting module 24 connected between the power supply unit 22 and the voltage acquisition unit 21 (taking 2 as an example, actually it can be one or more, which can be determined based on the design of the vehicle); Figure 2 For each lighting module 24, the lighting module 24 includes: a lighting unit 241 and a fault feedback unit 242, and the fault feedback unit 242 is respectively connected to the voltage acquisition unit 21, the power supply unit 22, and the lighting unit 241;

[0051] In this implementation, in relevant scenarios of the vehicle, the power supply unit 22 can be a device that provides power for the vehicle headlamp. For example, a power supply, which is usually connected to the vehicle's power system, such as a battery or a generator, and converts and regulates the electrical energy output by the power supply to meet the voltage and current requirements for the operation of the headlamp (i.e., at least one lighting unit 241).

[0052] In a possible implementation, the lighting unit 241 can be an LED light-emitting diode.

[0053] The power supply unit 22 is configured to provide a first feedback voltage to at least one fault feedback unit 242 through the first resistor 23 and supply power to at least one lighting unit 241;

[0054] At least one fault feedback unit 242 is configured to convert the first feedback voltage fed back to the voltage acquisition unit 21 into a second feedback voltage corresponding to the target lighting unit with a fault when the corresponding lighting unit 241 has a fault;

[0055] In this implementation, the power supply unit 22 supplies power to at least one lighting unit 241 to meet the on / off state required by the vehicle headlamp; since in the case of at least one lighting unit 241 having a fault, in order for the vehicle to identify that there is a lighting unit fault, at this time, it can be achieved by detecting the second feedback voltage corresponding to the target lighting unit with a fault fed back to the voltage acquisition unit 21. This second feedback voltage is actually fed back by at least one fault feedback unit 242 corresponding to the target lighting unit with a fault. The at least one fault feedback unit 242 is provided with an initial first feedback voltage by the power supply unit 22, that is, the supply voltage of the power supply unit 22, which will be detailed in the following embodiments.

[0056] ​

[0057] The voltage acquisition unit 21 is used to acquire a second feedback voltage, and the second feedback voltage is used to determine a target lighting unit with a fault or the number of target lighting units with faults in at least one lighting unit 241.

[0058] In this implementation, since the number of at least one lighting unit 241 can be one or more, when any one or more lighting units 241 are faulty (i.e., target lighting units), the voltages fed back by the fault feedback units 242 corresponding to the target lighting units are inconsistent. That is, when there are faults in at least one lighting unit 241, the first feedback voltage acquired by the voltage acquisition unit 21 will be converted into a corresponding second feedback voltage and sent to the control unit. The control unit can then implement based on a preset judgment strategy (given by the following embodiments) to determine the target lighting unit with a fault actually indicated by the second feedback voltage or the number of target lighting units with faults.

[0059] In a possible implementation, the voltage acquisition unit 21 can be a voltage sensor to accurately measure the magnitude of the voltage and forward it to the control unit described below.

[0060] The fault feedback circuit of the vehicle lamp provided by the embodiment of the present invention includes: a voltage acquisition unit, a power supply unit, a first resistor disposed between the power supply unit and the voltage acquisition unit, and at least one lighting module connected between the power supply unit and the voltage acquisition unit; for each lighting module, the lighting module includes: a lighting unit and a fault feedback unit, and the fault feedback unit is respectively connected to the voltage acquisition unit, the power supply unit, and the lighting unit; the power supply unit is configured to provide a first feedback voltage to at least one fault feedback unit through the first resistor and supply power to at least one lighting unit; at least one fault feedback unit is configured to convert the first feedback voltage fed back to the voltage acquisition unit into a second feedback voltage corresponding to the target lighting unit with a fault when the corresponding lighting unit has a fault; the voltage acquisition unit is configured to acquire the second feedback voltage, and the second feedback voltage is used to determine the target lighting unit with a fault or the number of target lighting units with a fault in at least one lighting unit. In this solution, the power supply unit provides a first feedback voltage for the fault feedback unit through the first resistor and supplies power to the lighting unit, constructing the basic energy supply of the circuit; when the lighting unit fails, the fault feedback unit can convert the first feedback voltage fed back to the voltage acquisition unit side into a second feedback voltage, and this conversion becomes the key signal for fault detection; the voltage acquisition unit acquires the second feedback voltage and determines the target lighting unit with a fault or the number of target lighting units based on the second feedback voltage. To achieve accurate detection and feedback of vehicle lamp faults, the faulty lighting unit can be quickly located, and whether it is a single or multiple lighting unit faults can be effectively identified, providing strong support for timely maintenance and ensuring the normal operation of the vehicle lamp, and improving the reliability and safety of the vehicle lamp system.

[0061] Based on the above embodiment, Figure 3 The structure diagram of the second embodiment of the fault feedback circuit of the vehicle lamp provided by the present invention is shown. As Figure 3 shown, for each fault feedback unit 242, the fault feedback unit 242 includes: a second resistor 32, a third resistor 33, a fourth resistor 34, and a triode 31;

[0062] The first end of the second resistor 32 is connected to the base of the triode 31, the second end of the second resistor 32 is connected to the power supply unit, the first end of the fourth resistor 34 is connected to the base of the triode 31, the second end of the fourth resistor 34 is connected to the lighting unit 241, and the second resistor 32 and the fourth resistor 34 are jointly configured to change the on-off state of the triode 31;

[0063] In this implementation, the second resistor 32 acts to pull up the base of the triode 31 to the power supply unit.

[0064] The first end of the third resistor 33 is connected to the emitter of the triode 31, and the second end of the third resistor 33 is grounded, which is used to divide the voltage with the first resistor 23 when the triode 31 is turned on, so as to change the first feedback voltage.

[0065] In this implementation, the third resistor 33 divides the voltage with the first resistor 23 when the triode 31 is turned on, so that the voltage of the fault feedback can be variable; under the condition that the first resistor 23 divides the voltage with other different resistors, the voltage of the fault feedback is different.

[0066] Correspondingly, for at least one triode 31, at least one triode 31 is used to be turned on after the corresponding second resistor 32 and the corresponding fourth resistor 34 divide the voltage when the corresponding lighting unit fails, and convert the first feedback voltage at the collector of at least one triode 31 into the second feedback voltage after the first resistor and the corresponding third resistor 33 divide the voltage;

[0067] In a possible implementation, when all lighting units are free of faults, the first feedback voltage can be the supply voltage of the power supply unit. When any lighting unit fails, the first feedback voltage is based on the voltage division of the third resistor corresponding to the faulty lighting unit and the first resistor 23 to generate the second feedback voltage.

[0068] The voltage acquisition unit 21 is respectively connected to the collectors of the triodes 31, and is used to acquire the converted second feedback voltage.

[0069] In this implementation, in the normal working condition, the bases of the triodes 31 are each divided by the respective second resistors 32, and the triodes 31 are in the non-conducting state. When there is damage to the lighting unit, the corresponding triode 31 is in the conducting state after the base of the corresponding triode 31 is divided by the second resistor 32 and the fourth resistor 34. At this time, the voltage at the collector of the corresponding triode 31 changes, from the first feedback voltage to the second feedback voltage, and the voltage acquisition unit 21 acquires this second feedback voltage.

[0070] Further, the fault feedback unit further includes: a diode 35 disposed between the fourth resistor 34 and the lighting unit 241;

[0071] The positive electrode of the diode 35 is connected to the fourth resistor 34, and the negative electrode of the diode 35 is connected to the lighting unit 241, which is used to prevent the current of other lighting units from flowing to the lighting unit when other lighting units fail.

[0072] In this implementation, under normal operating conditions, if this diode 35 is not added, if one lighting unit is damaged, the negative electrode of the damaged lighting unit is at a low level, and the negative electrodes of the other normal lighting units are at a high level. The high level will cause current to flow to the negative electrode of the damaged lighting unit, turning the originally low-level area into a high level, which will cause damage to the lighting unit again.

[0073] Further, each lighting module 24 further includes: a dual-triode constant-current circuit 36 connected to the lighting unit 241;

[0074] The first end of the dual-triode constant-current circuit 36 is connected to the lighting unit 241, and the second end of the dual-triode constant-current circuit 36 is grounded, which is used to keep the current of the lighting unit 241 within a preset current range.

[0075] In this implementation, the dual-triode constant-current circuit 36 provides a constant current to the lighting unit 241 to ensure that the light sources emitted by each lighting unit are consistent.

[0076] In a possible implementation, it is powered by a power supply unit, and a stable current output is achieved through the dual-triode constant-current circuit 36 to obtain a stable light-emitting brightness. Under normal operating conditions, the negative electrode of the lighting unit 241 is also at a high level, but it is about 3V lower than the positive electrode (this voltage is the forward conduction voltage of the lighting unit 241).

[0077] Optionally, the resistance values of the respective third resistors 33 are different; the triode 31 is a PNP-type triode; the lighting unit 241 is an LED light-emitting diode.

[0078] In this implementation, the resistance values of the respective third resistors 33 are different, so that when different lighting units fail, the second feedback voltage is also different, that is, the identifier (number, etc.) of the specific faulty lighting unit can be determined. Correspondingly, if the resistance values of the respective third resistors 33 are the same, when different lighting units fail, the second feedback voltage is also different, that is, the number of the specific faulty lighting units can be determined.

[0079] This determination implementation is given by the following method embodiments and will not be elaborated here.

[0080] The fault feedback circuit of the vehicle lamp provided by the embodiment of the present invention, for each fault feedback unit, the fault feedback unit includes: a second resistor, a third resistor, a fourth resistor, and a triode; the first end of the second resistor is connected to the base of the triode, the second end of the second resistor is connected to the power supply unit, the first end of the fourth resistor is connected to the base of the triode, the second end of the fourth resistor is connected to the lighting unit, and the second resistor and the fourth resistor are jointly used to change the on-off state of the triode; the first end of the third resistor is connected to the emitter of the triode, and the second end of the third resistor is grounded, and is used to perform voltage division with the first resistor when the triode is conducting, so that the first feedback voltage changes; for at least one triode, at least one triode is used to conduct after voltage division of the corresponding second resistor and the corresponding fourth resistor when the corresponding lighting unit fails, and convert the first feedback voltage at the collector of at least one triode into a second feedback voltage after voltage division of the first resistor and the corresponding third resistor; the voltage acquisition unit is respectively connected to the collectors of each triode, and is used to acquire the converted second feedback voltage. In this technical solution, the second resistor and the fourth resistor are connected to the power supply unit and the lighting unit, and the on-off state of the triode is changed according to the working state of the lighting unit; when the lighting unit is working normally, the two perform voltage division to make the triode cut off, and the first feedback voltage remains stable; when the lighting unit fails, the potential at the connection end of the fourth resistor changes, and together with the second resistor, it makes the triode conduct; after the triode conducts, the first feedback voltage at its collector is converted into a second feedback voltage under the voltage division action of the third resistor and the first resistor; multiple such fault feedback units respectively correspond to different lighting units, and the collected second feedback voltages are different due to different fault conditions. By analyzing the collected second feedback voltages, it is possible to accurately determine the faulty lighting unit and / or the number of corresponding faults, thus providing strong support for quickly locating and repairing vehicle lamp faults, effectively improving the reliability and stability of the vehicle lamp system, and ensuring vehicle driving safety.

[0081] II. Embodiment of the vehicle lamp fault identification method

[0082] Based on the above embodiment, Figure 4 The flowchart of the embodiment of the vehicle lamp fault identification method provided by the present invention is shown; Figure 5 The structure diagram of the third embodiment of the vehicle lamp fault feedback circuit provided by the present invention is shown. Combining Figure 5 with Figure 4 the vehicle lamp fault identification method involved is described in detail. As Figure 4 shown, this method is applied to a control unit and includes:

[0083] Step 41, obtain the target feedback voltage acquired by the voltage acquisition unit in the fault feedback circuit;

[0084] In this step, during the operation of the vehicle, the voltage acquisition unit continuously acquires the target feedback voltage and sends the target feedback voltage to the control unit.

[0085] Optionally, when all the lighting units are in the normal working state, the target feedback voltage acquired by the voltage acquisition unit is the supply voltage of the power supply unit.

[0086] In a possible implementation, taking Figure 5 as an example, for the sake of easy understanding, on the basis of the above Figure 3 taking 3 lighting modules as an example, specifically, the first resistor R1, the second resistors (R2, R5, R8,), the third resistors (R3, R6, R7), the fourth resistors (R4, R7, R10), the triodes (Q1, Q2, Q3), the lighting units (LED1, LED2, LED3), and the diodes (D1, D2, D3).

[0087] That is, taking Figure 5 as an example, in the normal working state, the cathodes of LED1, LED2, and LED3 are all at high level. On the fault feedback side, that is, the voltage acquisition unit is pulled up to the power supply unit through R1; D1, D2, and D3 are reversely non-conductive; Q1, Q2, and Q3 are non-conductive; for the fault feedback, only R1 is pulled up to the power supply unit and does not form a voltage division with R3, R6, and R9. Therefore, the fault feedback voltage is the supply voltage of the power supply unit, that is, the following V supply.

[0088] That is to say, in the actual implementation, the first feedback voltage in the normal working state is the supply voltage; when at least one lighting unit fails, it changes from the first feedback voltage to the second feedback voltage, that is, the target feedback voltage collected by the control unit can be the first feedback voltage, the second feedback voltage, etc., where the second feedback voltage changes based on the number change of the faulty lighting units.

[0089] Step 42: According to the target feedback voltage, determine the information of the target lighting unit with a fault in the fault feedback circuit in the mapping relationship;

[0090] Among them, the mapping relationship records the corresponding relationship between at least one preset lighting unit information and the feedback voltage corresponding to at least one lighting unit information. The feedback voltage is jointly determined based on the first resistor in the fault feedback circuit, the third resistor corresponding to at least one lighting unit with a fault in the lighting unit information corresponding to the feedback voltage, and the supply voltage of the power supply unit.

[0091] In this step, at least one feedback voltage is recorded in the mapping relationship. The target feedback voltage is matched with the at least one feedback voltage, and the lighting unit information corresponding to the consistent feedback voltage is determined as the target lighting unit information, which indicates the number and / or identification of the faulty lighting units in the current vehicle.

[0092] Optionally, the determination of the mapping relationship may include the following two methods: 1) Determine the mapping relationship according to the feedback voltage corresponding to at least one faulty lighting unit and the identification of at least one faulty lighting unit; 2) Determine the mapping relationship according to the feedback voltage corresponding to at least one faulty lighting unit and the number of at least one faulty lighting unit.

[0093] Furthermore, an embodiment of the present invention shows a method for determining the feedback voltage.

[0094] Step 1: Determine the parallel resistance value of the third resistors corresponding to at least one faulty lighting unit;

[0095] In this implementation, when the faulty lighting units are known in advance, to determine the feedback voltage corresponding to the theoretically faulty lighting units, first obtain the third resistors of at least one faulty lighting unit respectively, and connect these resistors in parallel to determine the equivalent resistance value, denoted as the parallel resistance value.

[0096] It should be understood that when the number of faulty lighting units is 1, the parallel resistance value is actually the resistance value of the corresponding third resistor.

[0097] Step 2: Determine the resistance value of the first resistor in the fault feedback circuit, the first sum value of the parallel resistance value and the first resistor, and the first ratio of the parallel resistance value to the first sum value;

[0098] In this implementation, sum the parallel resistance value and the resistance value of the first resistor to obtain the first sum value, and then calculate the ratio of the parallel resistance value to the first sum value to obtain the first ratio.

[0099] Step 3: Determine the feedback voltage corresponding to at least one faulty lighting unit by multiplying the power supply voltage of the power supply unit by the first product value of the first ratio.

[0100] In this implementation, multiply the power supply voltage of the power supply unit by the first ratio to obtain the first product value, and then determine the first product value as the feedback voltage corresponding to at least one faulty lighting unit.

[0101] Exemplarily, taking the following Figure 5 as an example, a detailed description of the principles of Steps 1 to 3 involved in the method for determining the feedback voltage is as follows:

[0102] When LED1 is damaged, the negative electrode of LED1 is at low level, D1 conducts, and after R2 and R4 divide the voltage, Q1 conducts. At this time, the feedback voltage is the voltage after R1 and R3 divide the voltage, and V_fault = V_supply * R3 / (R1 + R3).

[0103] Similarly:

[0104] When LED2 is damaged, V_fault = V_supply * R6 / (R1 + R6);

[0105] When LED3 is damaged, V_fault = V_supply * R9 / (R1 + R9);

[0106] When both LED1 and LED3 are damaged, V_fault = V_supply * (the resistance after R3 and R9 are in parallel) / (R1 + the resistance after R3 and R9 are in parallel);

[0107] When both LED1 and LED2 are damaged, V_fault = V_supply * (the resistance after R3 and R6 are in parallel) / (R1 + the resistance after R3 and R6 are in parallel);

[0108] When LED1, LED2, and LED3 are all damaged, V_fault = V_supply * (the resistance after R3, R6, and R9 are in parallel) / (R1 + the resistance after R3, R6, and R9 are in parallel).

[0109] Optionally, for 2) in the mapping relationship, the resistance values of all the third resistors in the fault feedback circuit are the same;

[0110] Correspondingly, for each lighting unit information, the lighting unit information includes: the number of at least one lighting unit with a fault;

[0111] In this implementation, that is, the resistance values of the above-mentioned R3, R6, and R9 are the same. Then, based on the above method for determining the feedback voltage, it can be known that different feedback voltages can indicate the number of lighting units with faults.

[0112] For example, taking V_supply as 10V, R1 as 4Ω, and R3, R6, and R9 all as 4Ω as an example, there is a mapping relationship as shown in Table 1:

[0113] Table 1

[0114] Feedback voltage (approximate value) Number of faulty lighting units 10V 0 5V 1 3.33V 2 2.5V 3

[0115] Optionally, for 1) in the mapping relationship, the resistance values of all the third resistors in the fault feedback circuit are different;

[0116] Correspondingly, for each lighting unit information, the lighting unit information further includes: the identifier of at least one lighting unit with a fault.

[0117] In this implementation, that is, the resistance values of R3, R6, and R9 mentioned above are all different. According to the above method for determining the feedback voltage, it can be known that different feedback voltages can indicate the identification (such as number) of the faulty lighting unit.

[0118] For example, taking V supply as 10V, R1 as 4Ω, R3 as 4Ω, R6 as 5Ω, and R9 as 6Ω as an example, there is a mapping relationship as shown in Table 2:

[0119] Table 2

[0120]

[0121]

[0122] It should be understood that the feedback voltages in Table 1 and Table 2 above can be calculated based on the calculation method given above, and only the actual values are given here; and the values in this embodiment are all preset, and actually can be limited based on the usage or design requirements of the vehicle.

[0123] In the above implementation, if the detected target feedback voltage is 3.57V, it is determined that the target lighting unit information is: the identifications of the faulty lighting units are LED1 and LED2; if the detected target feedback voltage is 2.5V, it is determined that the target lighting unit information is: the number of faulty lighting units is 3.

[0124] The method for identifying faults in vehicle lights provided by the embodiments of the present invention includes obtaining the target feedback voltage acquired by the voltage acquisition unit in the fault feedback circuit; determining the target lighting unit information of the faulty fault feedback circuit in the mapping relationship according to the target feedback voltage, where the mapping relationship records the corresponding relationship between at least one preset lighting unit information and the feedback voltage corresponding to at least one lighting unit information, and the feedback voltage is jointly determined based on the first resistor in the fault feedback circuit, the third resistor corresponding to at least one faulty lighting unit in the lighting unit information corresponding to the feedback voltage, and the supply voltage of the power supply unit. In this technical solution, by obtaining the target feedback voltage obtained by the voltage acquisition unit and using the preset mapping relationship to determine the target lighting unit information of the fault, it is possible to quickly and accurately locate the specific faulty lighting unit without a complex troubleshooting process.

[0125] III. Other Embodiments

[0126] Figure 6 Shows the structural diagram of the embodiment of the fault identification system for vehicle lights provided by the present invention, as Figure 6 shown, the fault identification system for vehicle lights includes: the above-mentioned fault feedback circuit for vehicle lights and the above-mentioned control unit.

[0127] The fault identification system of the vehicle lamp provided by the embodiment of the present invention can quickly and accurately locate the specific faulty lamp unit by obtaining the target feedback voltage obtained by the voltage acquisition unit and determining the target lamp unit information of the fault with the help of a preset mapping relationship, without a complex troubleshooting process.

[0128] Figure 7 The structural diagram of the first embodiment of the vehicle provided by the present invention is shown, as Figure 7 shown, the vehicle includes: the above-mentioned fault identification system of the vehicle lamp.

[0129] The vehicle provided by the embodiment of the present invention can quickly and accurately locate the specific faulty lamp unit by obtaining the target feedback voltage obtained by the voltage acquisition unit and determining the target lamp unit information of the fault with the help of a preset mapping relationship, without a complex troubleshooting process.

[0130] Figure 8 The structural diagram of the second embodiment of the vehicle provided by the present invention is shown, as Figure 8 shown, the vehicle includes: the above-mentioned fault feedback circuit of the vehicle lamp.

[0131] The vehicle provided by the embodiment of the present invention can quickly and accurately locate the specific faulty lamp unit by obtaining the target feedback voltage obtained by the voltage acquisition unit and determining the target lamp unit information of the fault with the help of a preset mapping relationship, without a complex troubleshooting process.

[0132] Figure 9 The structural diagram of the embodiment of the fault identification device of the vehicle lamp provided by the present invention is shown, as Figure 9 shown, the fault identification device of the vehicle lamp is applied to the control unit for identifying the above-mentioned fault feedback circuit, and includes:

[0133] An acquisition module 91, configured to acquire the target feedback voltage acquired by the voltage acquisition unit in the fault feedback circuit;

[0134] A determination module 92, configured to determine, according to the target feedback voltage, the target lamp unit information of the fault in the fault feedback circuit in the mapping relationship, where the mapping relationship records the corresponding relationship between at least one preset lamp unit information and the feedback voltage corresponding to the at least one lamp unit information, and the feedback voltage is jointly determined based on a first resistor in the fault feedback circuit, a third resistor corresponding to at least one faulty lamp unit in the lamp unit information corresponding to the feedback voltage, and the supply voltage of the power supply unit.

[0135] In one or more embodiments, before determining, according to the target feedback voltage, the target light unit information indicating a fault in the fault feedback circuit in the mapping relationship, the determining module 92 is further configured to:

[0136] Determine the parallel resistance value of the third resistors corresponding to at least one light unit with a fault;

[0137] Determine the first sum value of the resistance value of the first resistor and the parallel resistance value in the fault feedback circuit, and the first ratio of the parallel resistance value to the first sum value;

[0138] Determine the feedback voltage corresponding to at least one light unit with a fault by taking the first product value of the power supply voltage of the power supply unit and the first ratio.

[0139] In one or more embodiments, before determining, according to the target feedback voltage, the target light unit information indicating a fault in the fault feedback circuit in the mapping relationship, the determining module 92 is further configured to:

[0140] Determine the mapping relationship according to the feedback voltage corresponding to at least one light unit with a fault and the identifier of at least one light unit with a fault;

[0141] Or,

[0142] Determine the mapping relationship according to the feedback voltage corresponding to at least one light unit with a fault and the number of at least one light unit with a fault.

[0143] In one or more implementations, the resistance values of the third resistors in the fault feedback circuit are the same;

[0144] Correspondingly, for each piece of light unit information, the light unit information includes: the number of at least one light unit with a fault;

[0145] The resistance values of the third resistors in the fault feedback circuit are different;

[0146] Correspondingly, for each piece of light unit information, the light unit information further includes: the identifier of at least one light unit with a fault.

[0147] It should be noted that the division of each module of the above device is only a division of logical functions. In actual implementation, it can be fully or partially integrated into a physical entity, or physically separated. And these modules can all be implemented in the form of software called by a processing element. They can also all be implemented in the form of hardware. It is also possible that some modules are implemented in the form of software called by a processing element, and some modules are implemented in the form of hardware. In addition, all or part of these modules can be integrated together or independently implemented. Here, the processing element can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed by the integrated logic circuit in the processor element or the instructions in the form of software.

[0148] As can be seen from the above, the fault identification device for vehicle lights provided by the embodiment of the present invention can quickly and accurately locate the specific faulty light unit by obtaining the target feedback voltage obtained by the voltage acquisition unit and determining the target light unit information of the fault with the help of a preset mapping relationship, without a complex troubleshooting process.

[0149] Figure 10 The structural diagram of the embodiment of the electronic device provided by the present invention is shown, as Figure 10 shown, as Figure 10 shown, the electronic device may include: a processor 102, a communication interface 104, a memory 106, and a communication bus 108.

[0150] Among them: the processor 102, the communication interface 104, and the memory 106 communicate with each other through the communication bus 108. The communication interface 104 is used to communicate with network elements of other devices such as clients or other servers. The processor 102 is used to execute the program 100, and specifically can execute the relevant steps in the above-mentioned embodiment of the anti-collision method for the electronic device.

[0151] Specifically, the program 100 may include program codes, and the program codes include computer-executable instructions.

[0152] The processor 102 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiment of the present invention. One or more processors included in the electronic device may be of the same type of processor, such as one or more CPUs. It can also be different types of processors, such as one or more CPUs and one or more ASICs.

[0153] A memory 106 for storing a program 100. The memory 106 may include a high-speed RAM memory and may also include a non-volatile memory, such as at least one disk memory.

[0154] The program 100 can be specifically called by the processor 102 to cause the electronic device to perform the following operations:

[0155] Obtain a target feedback voltage acquired by the voltage acquisition unit in the fault feedback circuit;

[0156] According to the target feedback voltage, determine target light unit information of a faulty light unit in the fault feedback circuit in a mapping relationship. The mapping relationship records a corresponding relationship between at least one preset light unit information and the feedback voltage corresponding to the at least one light unit information. The feedback voltage is jointly determined based on a first resistor in the fault feedback circuit, a third resistor corresponding to at least one faulty light unit in the light unit information corresponding to the feedback voltage, and the supply voltage of the power supply unit.

[0157] In one or more possible implementations, the resistance values of the third resistors in the fault feedback circuit are all the same;

[0158] Correspondingly, for each light unit information, the light unit information includes: the number of at least one faulty light unit;

[0159] The resistance values of the third resistors in the fault feedback circuit are all different;

[0160] Correspondingly, for each light unit information, the light unit information further includes: the identifier of at least one faulty light unit.

[0161] In one or more embodiments, before determining the target light unit information of the faulty light unit in the fault feedback circuit according to the target feedback voltage in the mapping relationship, the following is further performed:

[0162] Determine the parallel resistance value of the third resistors corresponding to at least one faulty light unit;

[0163] Determine the first sum value of the resistance value of the first resistor in the fault feedback circuit and the parallel resistance value, and the first ratio of the parallel resistance value to the first sum value;

[0164] Determine the first product value of the supply voltage of the power supply unit and the first ratio as the feedback voltage corresponding to at least one faulty light unit.

[0165] In one or more embodiments, before determining the target lighting unit information indicating a fault in the fault feedback circuit based on the target feedback voltage in the mapping relationship, the following operations are further performed:

[0166] Determine the mapping relationship according to the feedback voltage corresponding to at least one lighting unit with a fault and the identifier of at least one lighting unit with a fault;

[0167] Or,

[0168] Determine the mapping relationship according to the feedback voltage corresponding to at least one lighting unit with a fault and the number of at least one lighting unit with a fault.

[0169] As can be seen from the above, the electronic device provided by the embodiment of the present invention can quickly and accurately locate the specific lighting unit with a fault by obtaining the target feedback voltage acquired by the voltage acquisition unit and determining the target lighting unit information indicating a fault with the aid of a preset mapping relationship, without a complex troubleshooting process.

[0170] The embodiment of the present invention provides a computer-readable storage medium storing at least one executable instruction, which, when running on a fault identification device / electronic device of a vehicle lamp, enables the fault identification device / electronic device of the vehicle lamp to execute the vehicle lamp fault identification method in any of the above method embodiments.

[0171] The executable instruction can specifically be used to enable the fault identification device / electronic device of the vehicle lamp to perform the following operations:

[0172] Obtain the target feedback voltage acquired by the voltage acquisition unit in the fault feedback circuit;

[0173] Based on the target feedback voltage, determine the target lighting unit information indicating a fault in the fault feedback circuit in the mapping relationship, where the mapping relationship records the corresponding relationship between at least one preset lighting unit information and the feedback voltage corresponding to the at least one lighting unit information, and the feedback voltage is jointly determined based on a first resistor in the fault feedback circuit, a third resistor corresponding to at least one lighting unit with a fault in the lighting unit information corresponding to the feedback voltage, and the supply voltage of the power supply unit.

[0174] In one or more possible implementations, the resistance values of the third resistors in the fault feedback circuit are all the same;

[0175] Correspondingly, for each lighting unit information, the lighting unit information includes: the number of at least one lighting unit with a fault;

[0176] The resistance values of the third resistors in the fault feedback circuit are all different;

[0177] Correspondingly, for each lighting unit information, the lighting unit information further includes: the identifier of at least one lighting unit with a fault.

[0178] In one or more embodiments, before determining the target lighting unit information with a fault in the fault feedback circuit according to the target feedback voltage in the mapping relationship, the following is further performed:

[0179] Determine the parallel resistance value of the third resistor corresponding to at least one lighting unit with a fault;

[0180] Determine the first sum value of the resistance value of the first resistor in the fault feedback circuit and the parallel resistance value, and the first ratio of the parallel resistance value to the first sum value;

[0181] Determine the feedback voltage corresponding to at least one lighting unit with a fault by taking the first product value of the power supply voltage of the power supply unit and the first ratio.

[0182] In one or more embodiments, before determining the target lighting unit information with a fault in the fault feedback circuit according to the target feedback voltage in the mapping relationship, the following is further performed:

[0183] Determine the mapping relationship according to the feedback voltage corresponding to at least one lighting unit with a fault and the identifier of at least one lighting unit with a fault;

[0184] Or,

[0185] Determine the mapping relationship according to the feedback voltage corresponding to at least one lighting unit with a fault and the number of at least one lighting unit with a fault.

[0186] As can be seen from the above, the fault identification device for an electronic device / vehicle lamp provided by the embodiments of the present invention can quickly and accurately locate the specific lighting unit with a fault by obtaining the target feedback voltage from the voltage acquisition unit and determining the target lighting unit information with a fault with the aid of a preset mapping relationship, without a complex troubleshooting process.

[0187] The embodiments of the present invention provide a computer program product, including a computer program, which when executed by a processor implements the operations of the above-mentioned fault identification method for vehicle lamps.

[0188] Its implementation principle and technical effects are as disclosed above.

[0189] The descriptions of the above embodiments tend to emphasize the differences between the embodiments. Their similarities or similarities can be referred to each other. For the sake of brevity, they will not be repeated herein.

[0190] In the method embodiments provided by the present invention, the disclosed methods can be arbitrarily combined without conflict to obtain new method embodiments.

[0191] In the product embodiments provided by the present invention, the disclosed features can be arbitrarily combined without conflict to obtain new product embodiments.

[0192] In the method or device embodiments provided by the present invention, the disclosed features can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0193] It should be noted that the above computer-readable storage medium can be a ROM, a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a ferromagnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM), etc. It can also be various vehicles including one or any combination of the above memories.

[0194] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0195] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0196] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of software plus necessary general hardware nodes. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, air conditioner, vehicle-mounted terminal or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0197] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses, devices, and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0198] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the specified functions in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0199] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the specified functions in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks. The algorithms or displays provided herein are not inherently related to any specific computer, virtual system, or other device. In addition, the embodiments of the present invention are not directed to any specific programming language.

[0200] It should be noted that the above embodiments are illustrative of the present invention and not restrictive thereof, and alternative embodiments can be designed by those skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In the unit claims listing several devices, several of these devices can be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A fault feedback circuit for a vehicle lamp, characterized in that, The circuit includes: a voltage acquisition unit, a power supply unit, a first resistor disposed between the power supply unit and the voltage acquisition unit, and at least one lighting module connected between the power supply unit and the voltage acquisition unit; for each lighting module, the lighting module includes: a lighting unit and a fault feedback unit, and the fault feedback unit is respectively connected to the voltage acquisition unit, the power supply unit, and the lighting unit; The power supply unit is configured to provide a first feedback voltage to the at least one fault feedback unit through the first resistor and supply power to the at least one lighting unit; The at least one fault feedback unit is configured to, when a corresponding lighting unit fails, convert the first feedback voltage fed back to the voltage acquisition unit into a second feedback voltage corresponding to the target lighting unit with a fault; The voltage acquisition unit is configured to acquire the second feedback voltage, and the second feedback voltage is used to determine the target lighting unit with a fault or the number of target lighting units with faults in the at least one lighting unit.

2. The fault feedback circuit of the vehicle lamp according to claim 1, characterized in that For each fault feedback unit, the fault feedback unit includes: a second resistor, a third resistor, a fourth resistor, and a triode; A first end of the second resistor is connected to a base of the triode, a second end of the second resistor is connected to the power supply unit, a first end of the fourth resistor is connected to the base of the triode, a second end of the fourth resistor is connected to the lighting unit, and the second resistor and the fourth resistor are jointly configured to change an on-off state of the triode; A first end of the third resistor is connected to an emitter of the triode, and a second end of the third resistor is grounded and configured to perform voltage division with the first resistor when the triode is turned on to change the first feedback voltage; Correspondingly, for at least one triode, the at least one triode is configured to, when a corresponding lighting unit fails, be turned on after voltage division by a corresponding second resistor and a corresponding fourth resistor, and convert the first feedback voltage at a collector of the at least one triode into a second feedback voltage after voltage division by the first resistor and a corresponding third resistor; The voltage acquisition unit is respectively connected to collectors of the triodes and is configured to acquire the converted second feedback voltage.

3. The fault feedback circuit of the vehicle lamp according to claim 2, characterized in that The fault feedback unit further includes: a diode disposed between the fourth resistor and the lighting unit; A positive electrode of the diode is connected to the fourth resistor, and a negative electrode of the diode is connected to the lighting unit and is configured to prevent current of other lighting units from flowing to the lighting unit when other lighting units fail.

4. The fault feedback circuit of the vehicle lamp according to any one of claims 1-3, characterized in that, Each lighting module further includes: a dual-triode constant current circuit connected to the lighting unit; A first end of the dual-triode constant current circuit is connected to the lighting unit, and a second end of the dual-triode constant current circuit is grounded and configured to keep a current of the lighting unit within a preset current range.

5. The fault feedback circuit of the vehicle lamp according to claim 2 or 3, characterized in that, Resistance values of the respective third resistors are different; The triode is a PNP type triode.

6. A method for fault identification of a vehicle lamp, characterized in that, A control unit applied to identify a fault feedback circuit of a vehicle lamp according to any one of claims 1-5, the method includes: Obtain the target feedback voltage acquired by the voltage acquisition unit in the fault feedback circuit; Based on the target feedback voltage, determine the target lamp unit information with a fault in the fault feedback circuit in the mapping relationship. The mapping relationship records the corresponding relationship between at least one preset lamp unit information and the feedback voltage corresponding to the at least one lamp unit information. The feedback voltage is jointly determined based on the first resistor in the fault feedback circuit, the third resistor corresponding to at least one faulty lamp unit in the lamp unit information corresponding to the feedback voltage, and the supply voltage of the power supply unit.

7. The method for identifying a fault of a vehicle lamp according to claim 6, characterized in that, The resistance values of all the third resistors in the fault feedback circuit are the same; Correspondingly, for each lamp unit information, the lamp unit information includes: the number of at least one faulty lamp unit; The resistance values of all the third resistors in the fault feedback circuit are different; Correspondingly, for each lamp unit information, the lamp unit information further includes: the identifier of at least one faulty lamp unit.

8. The method for identifying a fault of a vehicle lamp according to claim 7, characterized in that, Before determining the target lamp unit information with a fault in the fault feedback circuit in the mapping relationship based on the target feedback voltage, the method further includes: Determine the parallel resistance value of the third resistors corresponding to at least one faulty lamp unit; Determine the first sum value of the resistance value of the first resistor in the fault feedback circuit and the parallel resistance value, and the first ratio of the parallel resistance value to the first sum value; Determine the first product value of the supply voltage of the power supply unit and the first ratio as the feedback voltage corresponding to at least one faulty lamp unit.

9. The method for identifying a fault of a vehicle lamp according to claim 7 or 8, characterized in that, Before determining the target lamp unit information with a fault in the fault feedback circuit in the mapping relationship based on the target feedback voltage, the method further includes: Determine the mapping relationship according to the feedback voltage corresponding to at least one faulty lamp unit and the identifier of at least one faulty lamp unit; Or, Determine the mapping relationship according to the feedback voltage corresponding to at least one faulty lamp unit and the number of at least one faulty lamp unit.

10. A vehicle, characterized in that, The vehicle includes: the fault feedback circuit of the vehicle lamp according to any one of claims 1-5.

Images