CN108749709B - Steering lamp control system and method capable of being matched with different light sources - Google Patents
Steering lamp control system and method capable of being matched with different light sources Download PDFInfo
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- CN108749709B CN108749709B CN201810502722.5A CN201810502722A CN108749709B CN 108749709 B CN108749709 B CN 108749709B CN 201810502722 A CN201810502722 A CN 201810502722A CN 108749709 B CN108749709 B CN 108749709B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
- B60Q11/007—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not the lighting devices indicating change of drive direction
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- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention relates to the technical field of safe driving, and discloses a steering lamp control system and a steering lamp control method capable of being matched with different light sources, wherein the system comprises a controller, a driving module and a signal detection circuit, the controller is used for sending a control instruction to the driving module, the driving module is used for driving a steering lamp to work, and the signal detection circuit is used for detecting the driving current and/or the feedback voltage of the steering lamp, and the steering lamp control system is characterized in that the controller further comprises: the first fault detection module is used for judging whether a circuit has a fault according to the driving current detected by the signal detection circuit; and the second fault detection module is used for judging whether the circuit has faults or not according to the feedback voltage change detected by the signal detection circuit. The invention can be suitable for the change of the types of the turn lights, controls the turn lights with different configurations, enhances the adaptability of the controller, reduces the repeated development of the controller and reduces the cost.
Description
Technical Field
The invention relates to the technical field of safe driving, in particular to a steering lamp control system and method capable of being matched with different light sources.
Background
The car light is the essential condition of driving safety, and besides the illumination effect, the car light also has the warning effects of steering, braking and the like on other vehicles. The automobile steering signal lamp is a marking signal of the automobile movement direction and the automobile body state, and is related to the safety problem of the automobile. The turn lights are divided into front turn lights, rear turn lights and side turn lights according to positions. When an automobile turns, changes lanes or parks on the roadside, turn on the turn signal indicating the driver's intention to traffic police, pedestrians and other vehicles. For the sake of eye-catching, the turn signal lamp is not only bright but also has a flasher in its circuit to achieve flickering of the light.
The automobile steering lamp controller should have the functions of controlling various signal indicator lamps, automatically diagnosing faults and the like. The turn signal lamp controller can realize the control of various signal indicator lamps according to the operation of a driver when the automobile performs left-turn, right-turn, brake, emergency switch closing, parking, backing and other operations.
In the prior art, when the vehicle type needs to be configured, the vehicle quality needs to be improved, or the appearance needs to be improved, the load type of the turn signal lamp changes, such as the halogen of the turn signal lamp and the LED light source changes, so that the turn signal lamp controller needs to be re-developed due to the changes, and certain research and development and testing costs are generated. Therefore, the invention provides a steering lamp control system and a steering lamp control method capable of being matched with different light sources.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a steering lamp control system and a steering lamp control method capable of matching different light sources, which can meet different steering lamp load types, so that the control system does not need to be re-developed, and secondary research and development, test cost and the like are avoided.
In order to solve the above technical problem, the present invention provides a turn signal lamp control system capable of matching different light sources, comprising: the controller is used for sending a control instruction to the driving module, the driving module is used for driving the steering lamp to work, and the signal detection circuit is used for detecting the driving current and/or the feedback voltage of the steering lamp, and the controller is characterized by further comprising:
the first fault detection module is used for judging whether a circuit has a fault according to the magnitude of the driving current detected by the signal detection circuit;
and the second fault detection module is used for judging whether the circuit has faults or not according to the change of the feedback voltage detected by the signal detection circuit.
Preferably, the turn signal lamp control system further comprises a driving mode switching module, and the driving mode switching module is used for switching the driving mode of the driving module and driving the corresponding fault detection module according to different types of the turn signal lamps.
Further, the driver module has an interface for driving halogen and/or LED lamps.
Preferably, the driving current is an output current of the driving module, and the feedback voltage is a feedback voltage of the LED lamp.
The steering lamp control system further comprises a storage module, wherein the storage module is used for storing preset values of the driving current, and the preset values comprise a first preset value of the driving current for judging the fault of the front steering lamp, a second preset value of the driving current for judging the fault of the side steering lamp and a third preset value of the driving current for judging the fault of the rear steering lamp.
Correspondingly, the invention also provides a steering lamp control method capable of matching different light sources, which comprises the following steps:
selecting a corresponding driving mode according to the type of the turn signal lamp, wherein the driving mode comprises a first driving mode, a second driving mode and a third driving mode;
in the corresponding driving mode, when a starting signal of the turn light switch is received, the turn light is driven to be lightened;
detecting a driving current and/or a feedback voltage of the steering lamp;
and judging whether the turn light circuit has faults or not according to the driving current and/or the feedback voltage of the turn light.
Further, the types of the turn signal lamps include: the steering lamp is a halogen lamp, the steering lamp is a halogen lamp and an LED lamp, and the steering lamp is an LED lamp.
Preferably, the selecting the corresponding driving mode according to the type of the turn signal lamp includes:
when the front/rear turn signal lamp is a halogen lamp, the corresponding driving mode is the first driving mode;
when the front/rear steering lamp has both a halogen lamp and an LED lamp, the corresponding driving mode is the second driving mode;
and when the front/rear steering lamp is an LED lamp, the corresponding driving mode is the third driving mode.
Preferably, the judging whether the turn signal lamp circuit has a fault according to the driving current and/or the feedback voltage of the turn signal lamp comprises:
in the first driving mode, when the driving current is smaller than a preset value, judging the open-circuit fault of the output end of the halogen lamp;
in the second driving mode, when the driving current is smaller than a preset value, judging the open-circuit fault of the output end of the halogen lamp; when the feedback voltage of the LED lamp has high/low potential and flicker change, the LED lamp works normally; when the feedback voltage of the LED lamp is always high potential or low potential and has no flicker change, the LED lamp works abnormally;
in the third driving mode, when the feedback voltage of the LED lamp has high/low potential and flicker variation, the LED lamp works normally; when the feedback voltage of the LED lamp is always high potential or low potential and has no flicker change, the LED lamp works abnormally.
Further, when the fault of the steering lamp circuit is detected, a warning signal is sent to a vehicle-mounted prompting device.
The embodiment of the invention has the following beneficial effects:
the steering lamp control system has multiple driving modes, the corresponding steering lamp controller driving mode can be selected according to different types of the steering lamps, a new controller does not need to be developed again due to the load change of the steering lamps caused by the improvement of the quality or the appearance of the vehicle, and the control of the steering lamps of different types by one controller can be realized only by configuring the vehicle through internal software and by means of a vehicle diagnosis instrument or off-line equipment. The invention can be suitable for the change of the load type of the steering lamp, controls the steering lamps with different configurations, enhances the adaptability of the controller, reduces the repeated development of the controller and reduces the cost.
Drawings
Fig. 1 is a block diagram of a steering lamp control system capable of matching different light sources according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a circuit for collecting a feedback voltage signal of a turn signal according to an embodiment of the present invention;
FIG. 3 is a first waveform diagram of a turn signal feedback voltage signal provided by an embodiment of the present invention;
FIG. 4 is a second waveform diagram of a turn signal feedback voltage signal provided by an embodiment of the present invention;
fig. 5 is a flowchart of a turn signal lamp control method capable of matching different light sources according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a first driving mode provided by the embodiment of the invention;
FIG. 7 is a schematic diagram of a second driving mode provided by the embodiment of the invention;
fig. 8 is a schematic diagram of a third driving mode according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
The controller of the automobile steering lamp is realized according to the state information of the automobile lamp and the requirement of a driver on the state of the automobile lamp. The state information of the vehicle lamp is mainly the feedback of fault information, and the requirement of the driver on the state of the vehicle lamp is realized by pressing different switches. The specific control concept is as follows: after the system is started and initialized, the timer is started and periodically detects the vehicle lamp, and periodically scans the vehicle lamp switch, and determines how the lamp group is displayed and whether the lamp group works according to the diagnosis result and the vehicle lamp switch. When a fault occurs, the corresponding fault resolution program is adjusted. And (5) distinguishing the reasons of fault generation in the fault distinguishing program, and carrying out specific processing.
Example 1
The present embodiment provides a turn signal lamp control system capable of matching different light sources, please refer to fig. 1, including: the driving device comprises a controller 110, a driving module 120 and a signal detection circuit 130, wherein the controller 110 is connected with the driving module 120, and the driving module 120 is connected with a turn light 140. An output terminal of the signal detection circuit 130 is connected to the controller 110.
In this embodiment, the turn signal lamps may include four main lamps including a left front main lamp, a left rear main lamp, a right front main lamp and a right rear main lamp, and two side turn signal lamps, and preferably, this embodiment may further include two instrument indicator lamps as a turn signal lamp fault prompting device, where the instrument indicator lamps are used to indicate the operating states of the left main lamp and the right main lamp.
The controller 110 is configured to send a control instruction to the driving module 120, the driving module 120 is configured to drive a turn signal lamp to operate, the signal detection circuit 130 is configured to detect a driving current and/or a feedback voltage of the turn signal lamp, and the driving module has an interface for driving a halogen lamp and/or an LED lamp. The driving current is the output current of the driving module, and the feedback voltage is the feedback voltage of the LED lamp.
The controller 110 further includes:
a first failure detection module 111, where the first failure detection module 111 is configured to determine whether a circuit has a failure according to the magnitude of the driving current detected by the signal detection circuit 130;
a second failure detection module 112, where the second failure detection module 112 is configured to determine whether a circuit has a failure according to the change of the feedback voltage detected by the signal detection circuit 130.
The turn signal lamp control system further comprises a driving mode switching module, wherein the driving mode switching module is used for switching the driving mode of the driving module 120 and driving the corresponding fault detection module according to different types of the turn signal lamps.
The steering lamp control system further comprises a storage module used for storing preset values of the driving current, wherein the preset values comprise a first preset value of the driving current for judging the fault of the front steering lamp, a second preset value of the driving current for judging the fault of the side steering lamp and a third preset value of the driving current for judging the fault of the rear steering lamp.
The preset value of the driving current is used for judging whether the halogen lamp steering lamp works normally or not when the steering lamp comprises the halogen lamp. The storage module stores a preset value of the driving current and also stores an upper limit value of the driving current, namely when the driving current is higher than the upper limit value, the turn signal lamp is in a fault state.
When the turn signal lamp 140 is a halogen lamp, the signal detection circuit 130 detects a driving current of the driving module 120, and when the first fault detection module 111 of the controller obtains the driving current, the driving current is compared with a preset value in the storage module, and when the driving current is smaller than the preset value, an open-circuit fault at an output end of the halogen lamp is determined.
When the turn signal lamp 140 is a halogen lamp or an LED lamp, it is necessary to determine whether the halogen lamp is working normally on the one hand, and whether the LED lamp is working normally on the other hand. Specifically, for the judgment of the halogen lamp, the signal detection circuit 130 also detects the driving current of the driving module 120, when the first fault detection module 111 of the controller obtains the driving current, the driving current is compared with the preset value in the storage module, and when the driving current is smaller than the preset value, the open-circuit fault at the output end of the halogen lamp is judged; for the judgment of the LED lamp, the signal detection circuit 130 detects the feedback voltage of the LED lamp, the second fault detection module 112 of the controller 110 obtains a voltage signal, and when the voltage signal has a high/low potential and has a flicker change, it is judged that the LED lamp works normally; and when the voltage signal is always at a high potential or a low potential and has no flicker change, judging that the LED lamp works abnormally.
When the turn signal lamp 140 is an LED lamp, the second fault detection module 112 of the controller 110 obtains a voltage signal only by detecting the feedback voltage of the LED lamp through the signal detection circuit 130, and determines that the LED lamp is working normally when the voltage signal has a high/low potential and has a flicker change; and when the voltage signal is always at a high potential or a low potential and has no flicker change, judging that the LED lamp works abnormally.
Referring to fig. 2, a schematic diagram of an acquisition circuit for a feedback voltage signal of an LED turn signal is shown, where the acquisition circuit includes a pull-up resistor, one end of the pull-up resistor is connected to a power supply, and the other end of the pull-up resistor is connected to a feedback end of the LED. The diagnostic apparatus can be used to detect the flicker variation of high/low potential and determine whether the LED turn signal is working normally, which can be specifically determined by the waveform diagrams of fig. 3 and 4. When the output signal of the LED steering lamp detected by the diagnostic instrument is as shown in FIG. 3, and the LED steering lamp is in a normal working state if the output signal has high/low potential and has flicker change; when the voltage signal of the LED steering lamp detected by the diagnostic device is as shown in fig. 4, which is usually high potential or low potential, and there is no flicker change, the LED steering lamp is in an abnormal working state.
The turn light control system also comprises a power supply module which is used for supplying power to all modules in the system. When the fault of the turn signal lamp is detected, the instrument indicator lamp driving module receives an instruction from the controller 110 and drives the corresponding instrument indicator lamp according to the instruction so as to prompt the driver that the turn signal lamp is faulty. In this embodiment, the turn signal lamp fault reminding device is not limited to the instrument indicator lamp, but also can play voice prompt information through a voice device, or display the fault position of the turn signal lamp through a vehicle-mounted display device, and the like.
Example 2
The present embodiment provides a method for controlling a turn signal lamp, please refer to fig. 5, which includes:
s510, selecting a corresponding driving mode according to the type of the turn signal lamp, wherein the driving mode comprises a first driving mode, a second driving mode and a third driving mode.
The types of the turn signal lamps include: the steering lamp is a halogen lamp, the steering lamp is a halogen lamp and an LED lamp, and the steering lamp is an LED lamp.
The selecting the corresponding driving mode according to the type of the turn signal lamp comprises:
when the front/rear turn signal lamp is a halogen lamp, the corresponding driving mode is the first driving mode;
when the front/rear steering lamp has both a halogen lamp and an LED lamp, the corresponding driving mode is the second driving mode;
and when the front/rear steering lamp is an LED lamp, the corresponding driving mode is the third driving mode.
The step of selecting the corresponding driving mode according to the type of the turn signal lamp means that after the turn signal lamp is configured, the corresponding driving mode can be determined in the turn signal lamp control system according to the configured type of the turn signal lamp; the driver can select the driving mode of the turn light controller through the vehicle-mounted control system. For the interior of the controller, a driving mode is selected, which is equivalent to calling an implementation program corresponding to the driving mode, so that the steering lamp is controlled.
S520, in the corresponding driving mode, when the turn signal of the turn light switch is received, the turn light is driven to be turned on.
When a driver turns on a turn light switch, the controller receives a turn light signal instruction, identifies which turn light is a turn-on signal according to the received instruction, and sends a corresponding signal instruction to the driving module; and the driving module drives the corresponding steering lamp to be lightened according to the signal instruction sent by the controller.
And S530, detecting the driving current and/or the feedback voltage of the steering lamp.
Here, the driving current and the feedback voltage detection may be realized by a signal detection circuit. The signal detection circuit detects the driving current of the driving module and sends the driving current value to the controller 110; the signal detection circuit detects a feedback voltage of the LED lamp and transmits the feedback voltage to the controller 110. It should be noted that the feedback voltage of the LED lamp here can also be detected through the feedback line of the controller 110.
And S540, judging whether the steering lamp circuit has faults or not according to the driving current and/or the feedback voltage of the steering lamp.
The judging whether the turn signal lamp circuit has a fault according to the driving current and/or the feedback voltage of the turn signal lamp comprises the following steps:
referring to fig. 6, in the first driving mode, in which the turn signal lamps are only halogen lamps, only the driving current needs to be detected. And the controller compares the driving current with a preset value of the driving current, and judges the open-circuit fault of the output end of the halogen lamp when the driving current is smaller than the preset value.
Referring to fig. 7, in the second driving mode, that is, when the steering lamp has both the halogen lamp and the LED lamp, on one hand, it is necessary to determine whether the halogen lamp and the LED lamp are working normally. Specifically, for the judgment of the halogen lamp, the controller compares the driving current with a preset value of the driving current, and when the driving current is smaller than the preset value, the open-circuit fault of the output end of the halogen lamp is judged; for the judgment of the LED lamp, referring to the waveforms in fig. 3 and fig. 4 specifically, when the feedback line of the controller 110 detects that the feedback voltage signal of the LED lamp has a high/low potential and flicker variation, or the signal detection circuit detects that the feedback voltage signal of the LED lamp has a high/low potential and flicker variation, it is judged that the LED lamp is working normally; and when the output signal is always at a high potential or a low potential and has no flicker change, judging that the LED lamp works abnormally.
Referring to fig. 8, in the third driving mode, that is, the turn signal lamp is only an LED lamp, and the waveforms shown in fig. 3 and fig. 4 are specifically used for determining, when the voltage signal of the LED lamp has a high/low potential and flicker variation, it is determined that the LED lamp is working normally; and when the output signal is always at a high potential or a low potential and has no flicker change, judging that the LED lamp works abnormally.
The preset values of the driving current are stored in the memory in advance, and the preset values can be divided into three categories, including a first preset value of the driving current for judging the fault of the front main lamp, a second preset value of the driving current for judging the fault of the side steering lamp and a third preset value of the driving current for judging the fault of the rear main lamp. The memory stores a driving current upper limit value in addition to a determination lower limit value of the driving current, and the turn signal lamp is also in a failure state when the driving current is greater than the upper limit value.
When the fault of the steering lamp is detected, a warning signal is sent to the vehicle-mounted prompting device, wherein the warning signal can be reflected in various forms, such as an instrument indicating lamp, and when the steering lamp is in fault, the processor can drive the corresponding instrument indicating lamp to be lightened so as to prompt a driver that a certain steering lamp is in fault; the vehicle-mounted voice device can be used for reporting the fault through the vehicle-mounted voice device when the steering lamp fails; and the vehicle-mounted display device can directly display the fault position of the steering lamp on the vehicle-mounted display device.
The steering lamp control system has multiple driving modes, the corresponding steering lamp controller driving mode can be selected according to different types of the steering lamps, a new controller does not need to be developed again due to the load change of the steering lamps caused by the improvement of the quality or the appearance of the vehicle, and the steering lamps of different types can be controlled by one controller only through the configuration of internal software. The invention can be suitable for the change of the load type of the steering lamp, controls the steering lamps with different configurations, enhances the adaptability of the controller, reduces the repeated development of the controller and reduces the cost.
The configurations shown in the present embodiment are only partial configurations related to the present application, and do not constitute a limitation on the devices to which the present application is applied, and a specific device may include more or less components than those shown, or combine some components, or have an arrangement of different components.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (9)
1. The utility model provides a can match turn to lamp control system of different light sources, turn to lamp control system includes controller, drive module and signal detection circuitry, the controller be used for to drive module sends control command, drive module is used for driving the work of indicator, signal detection circuitry is used for detecting the drive current and/or the feedback voltage of indicator, its characterized in that, the controller still includes:
the first fault detection module is used for judging whether a circuit has a fault according to the magnitude of the driving current detected by the signal detection circuit;
the second fault detection module is used for judging whether the circuit has faults or not according to the change of the feedback voltage detected by the signal detection circuit;
the steering lamp control system further comprises a driving mode switching module, and the driving mode switching module is used for switching the driving mode of the driving module and driving the corresponding fault detection module according to different types of the steering lamps.
2. A turn signal lamp control system capable of matching different light sources according to claim 1, characterized in that the driving module has an interface for driving halogen lamps and/or LED lamps.
3. The system as claimed in claim 2, wherein the driving current is an output current of the driving module, and the feedback voltage is a feedback voltage of the LED lamp.
4. The system as claimed in claim 1, further comprising a storage module for storing the preset values of the driving current, wherein the preset values include a first preset value of the driving current for judging the fault of the front steering lamp, a second preset value of the driving current for judging the fault of the side steering lamp, and a third preset value of the driving current for judging the fault of the rear steering lamp.
5. A turn signal lamp control method based on the turn signal lamp control system according to any one of claims 1 to 4, comprising:
selecting a corresponding driving mode according to the type of the turn signal lamp, wherein the driving mode comprises a first driving mode, a second driving mode and a third driving mode;
in the corresponding driving mode, when a starting signal of the turn light switch is received, the turn light is driven to be lightened;
detecting a driving current and/or a feedback voltage of the steering lamp;
and judging whether the turn light circuit has faults or not according to the driving current and/or the feedback voltage of the turn light.
6. The turn signal lamp control method according to claim 5, wherein the types of the turn signal lamp include: the steering lamp is a halogen lamp, the steering lamp is a halogen lamp and an LED lamp, and the steering lamp is an LED lamp.
7. The turn signal lamp control method according to claim 6, wherein the selecting the corresponding driving mode according to the type of the turn signal lamp comprises:
when the front/rear turn signal lamp is a halogen lamp, the corresponding driving mode is the first driving mode;
when the front/rear steering lamp has both a halogen lamp and an LED lamp, the corresponding driving mode is the second driving mode;
and when the front/rear steering lamp is an LED lamp, the corresponding driving mode is the third driving mode.
8. The turn signal lamp control method according to claim 7, wherein the judging whether the turn signal lamp circuit has a fault according to the driving current and/or the feedback voltage of the turn signal lamp comprises:
in the first driving mode, when the driving current is smaller than a preset value, judging the open-circuit fault of the output end of the halogen lamp;
in the second driving mode, when the driving current is smaller than a preset value, judging the open-circuit fault of the output end of the halogen lamp; when the feedback voltage of the LED lamp has high/low potential and flicker change, the LED lamp works normally; when the feedback voltage of the LED lamp is always high potential or low potential and has no flicker change, the LED lamp works abnormally;
in the third driving mode, when the feedback voltage of the LED lamp has high/low potential and flicker variation, the LED lamp works normally; when the feedback voltage of the LED lamp is always high potential or low potential and has no flicker change, the LED lamp works abnormally.
9. The turn signal control method according to claim 5, characterized in that when the turn signal circuit failure is detected, a warning signal is sent to an on-vehicle prompting device.
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| CN110901520B (en) * | 2019-11-01 | 2021-09-17 | 北京汽车股份有限公司 | Steering lamp control system and method thereof |
| CN113696836B (en) * | 2021-08-26 | 2023-03-31 | 东风柳州汽车有限公司 | Fault diagnosis circuit and method for steering lamp |
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| CN2879587Y (en) * | 2006-02-28 | 2007-03-14 | 大星电机工业株式会社 | Fault diagnosing device for vehicle illumination part |
| JP2008049974A (en) * | 2006-08-28 | 2008-03-06 | Nippon Yusoki Co Ltd | Electric lamp driving device |
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| CN108749709A (en) | 2018-11-06 |
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