CN117042242A - Car lamp control circuit and control method thereof - Google Patents

Abstract

The invention relates to the technical field of circuits, in particular to a car lamp control circuit and a control method thereof, wherein the circuit comprises a main control circuit, a power circuit and an LED lamp; the power circuit is respectively and electrically connected with the power supply end and the LED lamp; the main control circuit is in signal connection with the power circuit; the method comprises the following steps: the method comprises the steps that a main control circuit obtains a fault detection signal of a vehicle in a steering period, and whether the fault detection signal is a valid signal is determined based on interval duration of two continuous fault detection signals; if the main control circuit determines that the fault detection signal is a valid signal, a pulse control signal is sent to the power circuit; when the pulse control signal is at a high level, the power circuit is conducted with the power supply end so as to increase the power of the LED lamp to the power required by detection; when the pulse control signal is at a low level, the power circuit is disconnected from the power supply end, and the power of the LED lamp is reduced; the invention can self-adapt to fault detection signals and control the lamp to work, thereby improving the safety and the installation convenience of the lamp.

Description

Car lamp control circuit and control method thereof

Technical Field

The invention relates to the technical field of testing, in particular to a car lamp control circuit and a control method thereof.

Background

The lamp needs to meet the brightness requirement of the turn signal lamp for the road vehicle, and in the related technology, the requirement of matching the vehicle to the fault detection of the lamp is met by adding a large resistor in the LED lamp, so that the heat generation can be serious, the lamp can be invalid, and the safety of the vehicle can be even affected. And the resistor is larger in volume, so that a larger space of the lamp is occupied, and the installation position of the lamp is affected.

Therefore, it is necessary to provide a solution capable of reducing power consumption, reducing heat generation, thereby improving use safety, and facilitating installation.

Disclosure of Invention

Accordingly, an objective of the embodiments of the present invention is to provide a vehicle lamp control circuit and a control method thereof, which solve one or more technical problems in the prior art, and at least provide a beneficial choice or creation condition.

In one aspect, an embodiment of the present invention provides a vehicle lamp signal control system, including: the LED lamp comprises a main control circuit, a power circuit and an LED lamp; the input end of the power circuit is electrically connected with the power supply end, and the output end of the power circuit is electrically connected with the LED lamp; the main control circuit is in signal connection with the power circuit;

the main control circuit is used for acquiring fault detection signals of the vehicle in one steering period and determining whether the fault detection signals are effective signals or not based on interval duration of two continuous fault detection signals; if the fault detection signal is determined to be a valid signal, a pulse control signal is sent to a power circuit;

the power circuit is used for being conducted with the power supply end when the pulse control signal is at a high level so as to boost the power of the LED lamp to the power required by detection; when the pulse control signal is at a low level, the pulse control signal is disconnected with the power supply end, and the power of the LED lamp is reduced.

Optionally, the car light control circuit further comprises a transformation circuit and an acquisition circuit, wherein the input end of the transformation circuit is electrically connected with the power supply end, and the output end of the transformation circuit is electrically connected with the acquisition circuit, the main control circuit and the LED lamp respectively; the main control circuit is also in signal connection with the acquisition circuit;

the transformation circuit is used for converting the power supply voltage of the power supply end into rated voltage matched with the acquisition circuit, the main control circuit and the LED lamp;

the acquisition circuit is used for sending an interrupt signal to the main control circuit when the rated voltage input by the voltage transformation circuit is accessed;

the main control circuit is used for responding to the interrupt signal and sending a pulse control signal.

Optionally, the main control circuit comprises a singlechip and a level trigger circuit, wherein an interrupt pin of the singlechip is connected with the output end of the acquisition circuit, and a pulse pin is connected with the level trigger circuit; the level triggering circuit comprises a first triode and a second triode, wherein the base electrode of the first triode is connected with the pulse pin of the singlechip, and the collector electrode of the first triode is connected with the base electrode of the second triode; the collector of the first triode and the collector of the second triode are commonly connected with the output end of the voltage transformation circuit, and the emitter of the first triode and the emitter of the second triode are commonly grounded.

Optionally, the level trigger circuit further includes a first resistor, a second resistor, a third resistor, and a fourth resistor, where the first resistor is disposed between the base of the first triode and the pulse pin of the single-chip microcomputer, the second resistor is disposed between the collector of the first triode and the base of the second triode, the third resistor is disposed between the collector of the first triode and the output end of the voltage transformation circuit, and the fourth resistor is disposed between the collector of the second triode and the output end of the voltage transformation circuit.

Optionally, the level trigger circuit further includes a fifth resistor and a zener diode, wherein one end of the fifth resistor and the cathode of the zener diode are commonly connected to the pulse pin of the singlechip, and the other end of the fifth resistor and the anode of the zener diode are commonly grounded.

Optionally, the power circuit comprises a MOS tube and a plurality of resistor sets, wherein each resistor set comprises a plurality of parallel power resistors, and the power resistors in two adjacent resistor sets are connected in series in a one-to-one correspondence manner; and two ends of the resistor set are respectively connected with the power supply end and the drain electrode of the MOS tube, and the grid electrode of the MOS tube is connected with the collector electrode and the source electrode of the second triode to be grounded.

Optionally, the voltage transformation circuit includes a DC-DC step-down chip, and the DC-DC step-down chip is configured to convert a supply voltage into a rated voltage, where the supply voltage and the rated voltage are both direct current voltages.

Optionally, the acquisition circuit comprises a first diode and a photoelectric coupler, wherein the anode of the first diode is connected with a power supply end, and the cathode of the first diode is respectively connected with two ends of a light emitting diode in an input pole of the photoelectric coupler; the output stage of the photoelectric coupler outputs a corresponding signal as an interrupt signal according to whether the light emitting diode emits light or not.

On the other hand, the embodiment of the invention provides a car light signal control method, which is applied to a car light control circuit, wherein the car light control circuit comprises a main control circuit, a power circuit and an LED lamp; the input end of the power circuit is electrically connected with the power supply end, and the output end of the power circuit is electrically connected with the LED lamp; the main control circuit is in signal connection with the power circuit;

the method comprises the following steps:

s100, a main control circuit acquires a fault detection signal of a vehicle in a steering period, and determines whether the fault detection signal is a valid signal or not based on the interval duration of two continuous fault detection signals;

s200, if the main control circuit determines that the fault detection signal is an effective signal, a pulse control signal is sent to the power circuit;

s300, when the pulse control signal is at a high level, the power circuit is conducted with the power supply end so as to increase the power of the LED lamp to the power required by detection; when the pulse control signal is at a low level, the power circuit is disconnected from the power supply end, and the power of the LED lamp is reduced.

Optionally, the car light control circuit further comprises a transformation circuit and an acquisition circuit, wherein the input end of the transformation circuit is electrically connected with the power supply end, and the output end of the transformation circuit is electrically connected with the acquisition circuit, the main control circuit and the LED lamp respectively; the main control circuit is also in signal connection with the acquisition circuit; in S200, if the master control circuit determines that the fault detection signal is a valid signal, the sending a pulse control signal to the power circuit includes:

s210, the voltage transformation circuit converts the power supply voltage of the power supply end into rated voltage matched with the acquisition circuit, the main control circuit and the LED lamp;

s220, when the acquisition circuit is connected with the rated voltage input by the voltage transformation circuit, an interrupt signal is sent to the main control circuit;

and S230, the main control circuit responds to the interrupt signal and sends a pulse control signal.

The embodiment of the invention has the following beneficial effects: the invention realizes the purpose of self-adapting the external fault detection signal of the car lamp control circuit and controlling the work of the lamp by matching the requirement of the fault detection signal of the car lamp. According to the invention, the main control module is used for collecting an external fault detection signal, identifying an effective signal and then sending a pulse control signal to the power circuit, so that the problem that the power circuit works for a long time because the similar products cannot detect the signal is perfectly solved. The consumption power is reduced, and the heating is reduced, so that the use safety is improved; the LED lamp reduces the consumed power, so that the size of elements can be reduced, the size of the lamp is reduced, and the LED lamp is convenient to install.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a circuit block diagram of a lamp control circuit according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a part of a circuit of a lamp control circuit according to an embodiment of the present invention;

FIG. 3 is a schematic circuit diagram of another portion of a lamp control circuit according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of steps of a method for controlling a vehicle lamp signal according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It should be noted that although functional power block division is performed in the apparatus schematic and a logic sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the power block division in the apparatus or the order in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to be limiting of the invention.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, or in one or more hardware power modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.

In the related art, the lamps are required to meet the brightness requirement of the turn signal lamp for the road vehicle, and the consumed power of the halogen lamp and the LED lamp is different. Because the LED lamp has high luminous efficiency, the power consumed by the LED lamp is only 1/5 of that of a halogen lamp, the power of the halogen lamp is generally about 21W, and the power of the LED lamp is only about 4W. Therefore, in order to make the LED lamp match the vehicle assembled with the halogen lamp, one of the common methods in the related art is to add a high-power resistor R0 circuit in the LED lamp 500, so that the total power of the LED lamp and the resistor reaches the power of the halogen lamp; the second method is to limit the working time of the high-power circuit 400 to 1/2 or 1/3 of the working period of a steering lamp through circuit design so as to meet the requirement of the fault detection signal of the steering lamp of the vehicle in ISO 13207. The two modes are that a large resistor is forcibly added in the LED lamp to meet the requirement of a vehicle on lamp fault detection, and the average power consumed by a high-power resistor R0 circuit is larger than 10W in one steering period. The heating in this case can be very severe, possibly causing lamp failure and even affecting vehicle safety. And the resistor is larger in volume, so that a larger space of the lamp is occupied, and the installation position of the lamp is affected.

Since the road vehicle has a fault detection function for the vehicle turn signal, the detection signal must conform to the ISO13207 standard. According to the invention, the LED steering lamp is matched to acquire the signal of vehicle fault detection, and the decoding signal is output after software operation, so that the LED lamp is controlled to work normally on a vehicle.

Based on the above, the invention provides a car light control circuit, which continuously reads the fault detection signal of a vehicle under the condition of the existing positive and negative electrode input without adding a signal wire; and the consumption power is reduced, and the heating is reduced, so that the use safety is improved; by reducing the volume of the element, the volume of the lamp is reduced, thereby facilitating the installation.

The embodiment of the invention provides a car lamp control circuit and a control method thereof, and specifically, the following embodiment is used for explaining, and firstly describing the car lamp signal control method in the embodiment of the invention.

Referring to fig. 1, an embodiment of the present invention provides a vehicle lamp control circuit, which includes a main control circuit 300, a power circuit 400, and an LED lamp 500; the input end of the power circuit 400 is electrically connected with the power supply end, and the output end is electrically connected with the LED lamp 500; the main control circuit 300 is in signal connection with the power circuit 400;

the main control circuit 300 is configured to obtain a fault detection signal of the vehicle in a steering period, and determine whether the fault detection signal is a valid signal based on an interval duration of two continuous fault detection signals; if the fault detection signal is determined to be a valid signal, a pulse control signal is sent to the power circuit 400;

the power circuit 400 is configured to be turned on with the power supply terminal when the pulse control signal is at a high level, so as to boost the power of the LED lamp 500 to the power required for detection; when the pulse control signal is at a low level, the power of the LED lamp 500 is reduced when the pulse control signal is disconnected from the power supply end.

In the embodiment provided by the invention, the period of the pulse control signal is smaller than the steering period, and the main control module calculates whether the interval duration of the continuous two fault detection signals reaches a set threshold value or not by acquiring the time of continuously recording the fault detection signals twice, so as to determine whether the fault detection signals are effective signals or interference signals; the invention realizes the purpose of self-adapting the external fault detection signal of the car lamp control circuit and controlling the work of the lamp by matching the requirement of the fault detection signal of the car lamp. The invention collects the external fault detection signals through the main control module, identifies the effective signals, and then sends the pulse control signals to the power circuit 400, thereby perfectly solving the problem that the similar products cannot detect the signals and the power circuit 400 works for a long time. The consumption power is reduced, and the heating is reduced, so that the use safety is improved; since the LED lamp 500 reduces the power consumed, the element volume can be reduced, and the lamp volume can be reduced, thereby facilitating installation.

In some embodiments, the car light control circuit further includes a voltage transformation circuit 100 and an acquisition circuit 200, wherein an input end and a power supply end of the voltage transformation circuit 100 are electrically connected, and an output end is electrically connected with the acquisition circuit 200, the main control circuit 300 and the LED lamp 500 respectively; the main control circuit 300 is also in signal connection with the acquisition circuit 200;

the voltage transformation circuit 100 is configured to transform a power supply voltage VIN of a power supply terminal into a rated voltage VDC adapted to the acquisition circuit 200, the main control circuit 300 and the LED lamp 500;

the acquisition circuit 200 is configured to send an interrupt signal to the master control circuit 300 when the rated voltage VDC input by the voltage transformation circuit 100 is accessed;

the main control circuit 300 is configured to send a pulse control signal in response to the interrupt signal.

As shown in fig. 2, in some embodiments, the master control circuit 300 includes a single-chip microcomputer U1 and a level trigger circuit 310, where an interrupt pin P32 of the single-chip microcomputer U1 is connected to an output end of the acquisition circuit 200, and a pulse pin PWM is connected to the level trigger circuit 310; the level triggering circuit 310 comprises a first triode Q1 and a second triode Q2, wherein the base electrode of the first triode Q1 is connected with the pulse pin PWM of the singlechip U1, and the collector electrode of the first triode Q1 is connected with the base electrode of the second triode Q2; the collector of the first triode Q1 and the collector of the second triode Q2 are commonly connected with the output end of the voltage transformation circuit 100, and the emitter of the first triode Q1 and the emitter of the second triode Q2 are commonly grounded.

In some embodiments, the level triggering circuit 310 further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, where the first resistor R1 is disposed between the base of the first triode Q1 and the pulse pin PWM of the single chip microcomputer U1, the second resistor R2 is disposed between the collector of the first triode Q1 and the base of the second triode Q2, the third resistor R3 is disposed between the collector of the first triode Q1 and the output end of the voltage transformation circuit 100, and the fourth resistor R4 is disposed between the collector of the second triode Q2 and the output end of the voltage transformation circuit 100.

In some embodiments, the level triggering circuit 310 further includes a fifth resistor R5 and a zener diode ZD1, where one end of the fifth resistor R5 and the cathode of the zener diode ZD1 are commonly connected to the pulse pin PWM of the single chip microcomputer U1, and the other end of the fifth resistor R5 and the anode of the zener diode ZD1 are commonly grounded.

In some embodiments, the power circuit 400 includes a MOS transistor Q3 and a plurality of resistor sets 410, where the resistor sets 410 include a plurality of parallel power resistors R0, and the power resistors R0 in two adjacent resistor sets 410 are connected in series in a one-to-one correspondence; the two ends of the resistor set 410 are respectively connected with the power supply end and the drain electrode of the MOS transistor Q3, and the grid electrode of the MOS transistor Q3 is connected with the collector electrode and the source electrode of the second triode Q2 to be grounded.

As shown in fig. 3, in some embodiments, the voltage transformation circuit 100 includes a DC-DC voltage reduction chip U2, where the DC-DC voltage reduction chip U2 is configured to convert a supply voltage VIN into a rated voltage VDC, and the supply voltage VIN and the rated voltage VDC are both direct-current voltages.

In the embodiment provided by the invention, the input voltage converts the DC12V voltage of the power supply end into the DC5V voltage through the DC-DC step-down chip U2 for the singlechip U1 and other devices in the car lamp control circuit to work.

In some embodiments, the collecting circuit 200 includes a first diode D1 and a photo coupler Q4, where an anode of the first diode D1 is connected to a power supply terminal, and a cathode of the first diode D1 is connected to two ends of a light emitting diode in an input pole of the photo coupler Q4, respectively; the output stage of the photo coupler Q4 outputs a corresponding signal as an interrupt signal according to whether the light emitting diode emits light or not.

It should be noted that, in the embodiment provided by the present invention, the photo coupler Q4 adopts a dual-light emitting diode, when the anode of the first diode D1 has a high level voltage, the light emitting diode of the first diode D1 and the photo coupler Q4 are turned on, after the light emitting diode of the photo coupler Q4 is turned on, the receiving end of the photo coupler Q4 is also turned on, so that the level at the interrupt pin P32 of the single chip microcomputer U1 is low; at the moment when the interrupt pin P32 changes from high level to low level, the external interrupt is generated by the singlechip U1, and the singlechip U1 starts to acquire and record signals after receiving the interrupt signals.

In some embodiments, the collecting circuit 200 further includes a first current limiting resistor R6 and a second current limiting resistor R7, where the first current limiting resistor R6 is connected to one end of the light emitting diode in the cathode of the first diode D1 and the input pole of the photo coupler Q4, and the second current limiting resistor R7 is connected to the other end of the light emitting diode in the cathode of the first diode D1 and the input pole of the photo coupler Q4. The acquisition circuit 200 further includes a filter circuit 210, where one end of the filter circuit 210 is connected to the cathode of the first diode D1, and the other end is grounded.

The working principle of the invention is as follows:

if the single chip microcomputer U1 determines that the fault detection signal is an effective signal, a pulse control signal is sent out through a pulse pin PWM, after the pulse control signal passes through a first resistor R1, the base electrode of a first triode Q1 is at a high level, the collector electrode and the emitter electrode of the first triode Q1 are controlled to be conducted, the base electrode of a second triode Q2 is triggered to be at a low level, the collector electrode and the emitter electrode of the second triode Q2 are controlled to be closed, the base electrode of a MOS tube Q3 is at a high level, the collector electrode and the emitter electrode of the MOS tube Q3 are controlled to be conducted, current is conducted to the negative electrode through a power circuit 400 and the collector electrode and the emitter electrode of the MOS tube Q3, and the power circuit 400 enters a working state. After the power circuit 400 starts to operate, the power of the whole LED lamp 500 is increased to meet the detection requirement.

When the pulse continues to the detection requirement, the level of the pulse control signal becomes low, the base electrode of the first triode Q1 is low level after the pulse control signal passes through the first resistor R1, and the collector electrode and the emitter electrode of the first triode Q1 are controlled to be closed, so that the base electrode of the second triode Q2 becomes high level, the collector electrode and the emitter electrode of the second triode Q2 are conducted, the base electrode of the MOS tube Q3 becomes low level, the collector electrode and the emitter electrode of the MOS tube Q3 are closed, and the current cannot be conducted to the negative electrode through the power circuit 400 and the collector electrode and the emitter electrode of the MOS tube Q3, so that the power of the LED lamp 500 is reduced.

In the above operation process, the duration of the high level of the pulse control signal (i.e. the operation time of the power circuit 400) is only about 20mS, and the whole steering operation period is about 750mS, so that the power circuit 400 generates little heat, thereby solving the problem of much heat of similar products.

As shown in fig. 4, an embodiment of the present invention provides a vehicle lamp signal control method, which is applied to a vehicle lamp control circuit, wherein the vehicle lamp control circuit includes a main control circuit 300, a power circuit 400 and an LED lamp 500; the input end of the power circuit 400 is electrically connected with the power supply end, and the output end is electrically connected with the LED lamp 500; the main control circuit 300 is in signal connection with the power circuit 400;

the method comprises the following steps:

s100, the main control circuit 300 acquires a fault detection signal of the vehicle in one steering period, and determines whether the fault detection signal is a valid signal or not based on the interval duration of two continuous fault detection signals;

s200, if the master control circuit 300 determines that the fault detection signal is a valid signal, a pulse control signal is sent to the power circuit 400;

s300, when the pulse control signal is at a high level, the power circuit 400 is conducted with the power supply end so as to increase the power of the LED lamp 500 to the power required by detection; when the pulse control signal is low, the power circuit 400 and the power supply terminal are disconnected, and the power of the LE D lamp 500 is reduced.

In the embodiment provided by the invention, the period of the pulse control signal is smaller than the steering period, and the main control module calculates whether the interval duration of the continuous two fault detection signals reaches a set threshold value or not by acquiring the time of continuously recording the fault detection signals twice, so as to determine whether the fault detection signals are effective signals or interference signals; the invention realizes the purpose of self-adapting the external fault detection signal of the car lamp control circuit and controlling the work of the lamp by matching the requirement of the fault detection signal of the car lamp. The invention collects the external fault detection signals through the main control module, identifies the effective signals, and then sends the pulse control signals to the power circuit 400, thereby perfectly solving the problem that the similar products cannot detect the signals and the power circuit 400 works for a long time. The consumption power is reduced, and the heating is reduced, so that the use safety is improved; since the LED lamp 500 reduces the power consumed, the element volume can be reduced, and the lamp volume can be reduced, thereby facilitating installation.

In some embodiments, the car light control circuit further includes a voltage transformation circuit 100 and an acquisition circuit 200, wherein an input end and a power supply end of the voltage transformation circuit 100 are electrically connected, and an output end is electrically connected with the acquisition circuit 200, the main control circuit 300 and the LED lamp 500 respectively; the main control circuit 300 is also in signal connection with the acquisition circuit 200; in S200, if the master circuit 300 determines that the fault detection signal is a valid signal, the sending a pulse control signal to the power circuit 400 includes:

s210, the voltage transformation circuit 100 converts the power supply voltage VIN of the power supply end into a rated voltage VDC which is matched with the acquisition circuit 200, the main control circuit 300 and the LED lamp 500;

s220, when the acquisition circuit 200 is connected with the rated voltage VDC input by the voltage transformation circuit 100, an interrupt signal is sent to the main control circuit 300;

s230, the main control circuit 300 transmits a pulse control signal in response to the interrupt signal.

It can be seen that, the content in the above system embodiment is applicable to the method embodiment, and the functions specifically implemented by the method embodiment are the same as those of the system embodiment, and the beneficial effects achieved by the system embodiment are the same as those achieved by the system embodiment.

The terms "first," "second," "third," "fourth," and the like in the description of the invention and in the above figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in the present invention, "at least one (item)" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not thereby limiting the scope of the claims of the embodiments of the present invention. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present invention shall fall within the scope of the claims of the embodiments of the present invention.

Claims (10)

1. A vehicle lamp signal control system, the system comprising: the LED lamp comprises a main control circuit, a power circuit and an LED lamp; the input end of the power circuit is electrically connected with the power supply end, and the output end of the power circuit is electrically connected with the LED lamp; the main control circuit is in signal connection with the power circuit;

the main control circuit is used for acquiring fault detection signals of the vehicle in one steering period and determining whether the fault detection signals are effective signals or not based on interval duration of two continuous fault detection signals; if the fault detection signal is determined to be a valid signal, a pulse control signal is sent to a power circuit;

the power circuit is used for being conducted with the power supply end when the pulse control signal is at a high level so as to boost the power of the LED lamp to the power required by detection; when the pulse control signal is at a low level, the pulse control signal is disconnected with the power supply end, and the power of the LED lamp is reduced.

2. The system of claim 1, wherein the lamp control circuit further comprises a voltage transformation circuit and a collection circuit, wherein the input end of the voltage transformation circuit is electrically connected with the power supply end, and the output end of the voltage transformation circuit is electrically connected with the collection circuit, the main control circuit and the LE D lamp respectively; the main control circuit is also in signal connection with the acquisition circuit;

the transformation circuit is used for converting the power supply voltage of the power supply end into rated voltage matched with the acquisition circuit, the main control circuit and the LED lamp;

the acquisition circuit is used for sending an interrupt signal to the main control circuit when the rated voltage input by the voltage transformation circuit is accessed;

the main control circuit is used for responding to the interrupt signal and sending a pulse control signal.

3. The system of claim 2, wherein the master control circuit comprises a single chip microcomputer and a level trigger circuit, wherein an interrupt pin of the single chip microcomputer is connected with an output end of the acquisition circuit, and a pulse pin is connected with the level trigger circuit; the level triggering circuit comprises a first triode and a second triode, wherein the base electrode of the first triode is connected with the pulse pin of the singlechip, and the collector electrode of the first triode is connected with the base electrode of the second triode; the collector of the first triode and the collector of the second triode are commonly connected with the output end of the voltage transformation circuit, and the emitter of the first triode and the emitter of the second triode are commonly grounded.

4. The system of claim 3, wherein the level triggering circuit further comprises a first resistor, a second resistor, a third resistor, and a fourth resistor, wherein the first resistor is disposed between the base of the first triode and the pulse pin of the single chip microcomputer, the second resistor is disposed between the collector of the first triode and the base of the second triode, the third resistor is disposed between the collector of the first triode and the output terminal of the voltage transformation circuit, and the fourth resistor is disposed between the collector of the second triode and the output terminal of the voltage transformation circuit.

5. The system of claim 4, wherein the level triggering circuit further comprises a fifth resistor and a zener diode, wherein one end of the fifth resistor and a cathode of the zener diode are commonly connected to the pulse pin of the single chip microcomputer, and the other end of the fifth resistor and an anode of the zener diode are commonly grounded.

6. The system of claim 3, wherein the power circuit comprises a MOS tube and a plurality of resistor sets, the resistor sets comprise a plurality of parallel power resistors, and the power resistors in two adjacent resistor sets are connected in series in a one-to-one correspondence manner; and two ends of the resistor set are respectively connected with the power supply end and the drain electrode of the MOS tube, and the grid electrode of the MOS tube is connected with the collector electrode and the source electrode of the second triode to be grounded.

7. The system of claim 2, wherein the voltage transformation circuit comprises a DC-DC buck chip for converting a supply voltage to a rated voltage, the supply voltage and the rated voltage both being direct voltages.

8. The system of claim 3, wherein the acquisition circuit comprises a first diode and a photo-coupler, wherein an anode of the first diode is connected with a power supply end, and a cathode of the first diode is respectively connected with two ends of a light emitting diode in an input pole of the photo-coupler; the output stage of the photoelectric coupler outputs a corresponding signal as an interrupt signal according to whether the light emitting diode emits light or not.

9. The car light signal control method is characterized in that the method is applied to a car light control circuit, and the car light control circuit comprises a main control circuit, a power circuit and an LED lamp; the input end of the power circuit is electrically connected with the power supply end, and the output end of the power circuit is electrically connected with the LED lamp; the main control circuit is in signal connection with the power circuit;

the method comprises the following steps:

s100, a main control circuit acquires a fault detection signal of a vehicle in a steering period, and determines whether the fault detection signal is a valid signal or not based on the interval duration of two continuous fault detection signals;

s200, if the main control circuit determines that the fault detection signal is an effective signal, a pulse control signal is sent to the power circuit;

s300, when the pulse control signal is at a high level, the power circuit is conducted with the power supply end so as to increase the power of the LED lamp to the power required by detection; when the pulse control signal is at a low level, the power circuit is disconnected from the power supply end, and the power of the LED lamp is reduced.

10. The method of claim 9, wherein the vehicle lamp control circuit further comprises a voltage transformation circuit and a collection circuit, wherein an input end of the voltage transformation circuit is electrically connected with a power supply end, and an output end of the voltage transformation circuit is electrically connected with the collection circuit, the main control circuit and the LED lamp respectively; the main control circuit is also in signal connection with the acquisition circuit; in S200, if the master control circuit determines that the fault detection signal is a valid signal, the sending a pulse control signal to the power circuit includes:

s210, the voltage transformation circuit converts the power supply voltage of the power supply end into rated voltage matched with the acquisition circuit, the main control circuit and the LED lamp;

s220, when the acquisition circuit is connected with the rated voltage input by the voltage transformation circuit, an interrupt signal is sent to the main control circuit;

and S230, the main control circuit responds to the interrupt signal and sends a pulse control signal.