System for preventing dormancy fault of vehicle lamp and vehicle lamp comprising same

Abstract

The utility model belongs to the technical field of car lamps, and particularly relates to a system for preventing a car lamp dormancy fault and a car lamp comprising the same, the system comprises a power supply module, a control module and a load driving module, the control module is used for controlling the load driving module to realize dormancy; the control module comprises a dormancy auxiliary circuit, and after the dormancy auxiliary circuit disconnects the control module and the load driving module, the power supply module and the load driving module are disconnected, so that fault-free dormancy of the system is realized. According to the system for preventing the dormancy fault of the automobile lamp, the dormancy auxiliary circuit in the system can effectively suppress the interference condition between electronic components during dormancy, and the power-off process is logically implemented on each component, so that the automobile lamp can stably enter the dormancy state without faults.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle lamps, and particularly relates to a system for preventing vehicle lamp sleep faults and a vehicle lamp including the same. Background Art

[0002] With the intelligent and dynamic application of LEDs in vehicles, the lamps are mainly controlled by a single hard wire in the past and now are mainly controlled by CAN / LIN communication. This method improves the information acquisition ability of the lamps. By increasing the application of signals, the intelligent and dynamic functions of modern vehicle lamps can be realized.

[0003] For vehicle lamps based on LIN communication, under LIN communication control, more lighting effects and more novel interaction forms can be achieved. At the same time, more electronic components and modules are brought. More electronic components and modules involve power management, which is also the sleep management of each component at the vehicle level.

[0004] In the existing solutions, most lamps are powered by the vehicle's battery for the lamp system. The vehicle instructions are received through a LIN transceiver, and then the load is controlled by a microcontroller. When the vehicle sleep instruction is received, the power supply of the load with a relatively forward position is turned off to achieve the power-off sleep of the electronic components.

[0005] However, the circuit connections are not single. There are often circuit connections between the backend components and the microcontroller, and there are bypass connections, etc. Only turning off the power supply of the load with a relatively forward position to achieve the power-off sleep of the electronic components will cause interference and current backflow during sleep, etc. As a result, the microcontroller may misjudge that the sleep condition is not met or the internal circuit is abnormally turned on due to the influence of the backflow.

[0006] Since this situation is random and affected by the operating states of the components in the system at that time, it is difficult to detect and find. It is manifested as occasional inability to sleep or being in a state of frequent restart, and on the lamp, it is manifested as frequent flashing of the light and an increase in the static current, etc. Summary of the Utility Model

[0007] In order to solve the technical problems that when the lamp sleeps, interference between electronic components causes faults, resulting in abnormal sleep or voltage not reaching the minimum, and an increase in the static current, the utility model provides a system for preventing vehicle lamp sleep faults and a vehicle lamp including the same. The sleep assist circuit in the system ensures that the interference between electronic components can be effectively suppressed during sleep, and the power-down process of each component is logically implemented, so that the lamp can enter the sleep state stably without faults.

[0008] The utility model provides a system for preventing vehicle lamp sleep faults, including:

[0009] A power supply module, a control module, and a load driving module, wherein the control module is used to control the load driving module to enter the sleep state;

[0010] The control module includes a sleep assist circuit. After the sleep assist circuit disconnects the connection between the control module and the load driving module, it disconnects the connection between the power supply module and the load driving module to achieve a fault-free sleep of the system.

[0011] Further, the power supply module includes:

[0012] A protection circuit and a voltage regulating circuit. The input end of the protection circuit is connected to the vehicle body battery, and the output end of the protection circuit is connected to the voltage regulating circuit;

[0013] Both the control module and the load driving module are connected to the output end of the voltage regulating circuit, and the sleep assist circuit is connected to the protection circuit.

[0014] Further, the control module further includes: an external LIN transceiver, a microcontroller, a sampling module, and a first CAN transceiver. The external LIN transceiver is connected to the vehicle body end, and the external LIN transceiver, the sleep assist circuit, and the first CAN transceiver are all connected to the microcontroller. The sampling module is connected to the first CAN transceiver, and both the sampling module and the first CAN transceiver are connected to the sleep assist circuit;

[0015] The sampling module is connected to the voltage regulating circuit, and the first CAN transceiver is connected to the load driving module.

[0016] Further, the load driving module includes:

[0017] A drive controller, a second CAN transceiver, and a lighting load. Both the second CAN transceiver and the lighting load are connected to the drive controller;

[0018] The drive controller is connected to the output end of the voltage regulating circuit, and the second CAN transceiver is connected to the first CAN transceiver.

[0019] Further, the voltage regulating circuit includes a voltage regulator. Both the sampling module and the first CAN transceiver are connected to the back-end enable switch of the microcontroller through the voltage regulator.

[0020] Further, the sleep assist circuit includes a low-voltage switch, and the protection circuit includes a high-voltage switch. The front-end enable switch of the microcontroller is connected to the high-voltage switch of the protection circuit through the low-voltage switch of the sleep assist circuit.

[0021] The present utility model also provides a vehicle lamp, including the system for preventing the vehicle lamp from having a sleep fault as described above.

[0022] The beneficial effects of the present utility model are as follows:

[0023] For a system for preventing headlight sleep faults of the present utility model, when the microcontroller controls the system to sleep, with the help of the sleep assist circuit, the circuit controls of the backend sampling module and the first CAN transceiver module can be preferentially turned off, cutting off the connection between the backend components and the microcontroller; subsequently, with the help of the sleep assist circuit, the circuit control of the protection circuit is turned off, cutting off the front-end power supply, achieving the purpose of hierarchically managing the power supplies of each component during sleep.

[0024] Cut off in sequence from the low voltage to the high voltage, so that the sleep process of the system can proceed step by step in an orderly manner, and the components with uncontrollable power supplies (such as sampling and internal CAN) are powered controlled through the sleep assist circuit. This enables each component module to operate logically during the sleep process, preventing the mutual influence between modules from generating dark current or current backflow, which affects the microcontroller's control of the sleep process and causes phenomena such as inability to sleep, frequent restart, or too high static current after sleep. This system makes the sleep of the lamp more stable, and the static current after sleep is also reduced, which will greatly improve the operation quality of the product.

[0025] For the headlight of the present utility model, since it has the system for preventing headlight sleep faults, therefore, it also has the advantages of the system for preventing headlight sleep faults.

[0026] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic diagram of the system for preventing headlight sleep faults of the present utility model;

[0029] Figure 2 It is a control schematic diagram of the system for preventing headlight sleep faults of the present utility model;

[0030] In the figure:

[0031] 10. Power supply module; 11. Protection circuit; 110. High-voltage switch; 12. Voltage regulation circuit; 120. Voltage regulator; 20. Control module; 21. Sleep assist circuit; 210. Low-voltage switch; 22. External LIN transceiver; 23. Microcontroller; 24. Sampling module; 25. First CAN transceiver; 30. Load driving module; 31. Drive controller; 32. Second CAN transceiver; 33. Lighting load. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] As Figure 1 and Figure 2 shown, the present utility model provides a system for preventing headlight sleep failure, including:

[0034] A power supply module 10, a control module 20 and a load driving module 30, wherein the control module 20 is used to control the load driving module 30 to implement sleep;

[0035] The control module 20 includes a sleep assist circuit 21. After the sleep assist circuit 21 disconnects the connection between the control module 20 and the load driving module 30, it disconnects the connection between the power supply module 10 and the load driving module 30 to achieve fault-free sleep of the system.

[0036] The present utility model provides a system for preventing headlight sleep failure. The sleep assist circuit 21 first cuts off the connection between the rear-end components and the microcontroller 23, and then cuts off the front-end power supply, cutting off from the low voltage to the high voltage in sequence, so that the sleep process of the system can be carried out in an orderly manner in stages, preventing the mutual influence between modules from generating dark current or current backflow, affecting the microcontroller's control of the sleep process, and causing phenomena such as inability to sleep, frequent restart, or too high static current after sleep.

[0037] The power supply module 10 includes: a protection circuit 11 and a voltage regulation circuit 12. The control module 20 further includes: an external LIN transceiver 22, a microcontroller 23, a sampling module 24 and a first CAN transceiver 25. The load driving module 30 includes: a drive controller 31, a second CAN transceiver 32 and a lighting load 33.

[0038] Among them, the input end of the protection circuit 11 is connected to the vehicle body battery, the output end of the protection circuit 11 is connected to the voltage regulation circuit 12, and the vehicle body battery is converted into a stable internal voltage through the protection circuit 11 and the voltage regulation circuit 12 for component use.

[0039] The system sleep comes from the sleep instruction of the vehicle body communication. It relies on the external LIN transceiver 22 to communicate with the microcontroller 23, and the microcontroller 23 controls the system to enter sleep. Since the external power supply of the system comes from the vehicle body battery and there is still external power supply during sleep, the system needs to control the power supply situation between each module by itself during sleep.

[0040] The external LIN transceiver 22 is connected to the vehicle body end. The external LIN transceiver 22, the sleep auxiliary circuit 21, and the first CAN transceiver 25 are all connected to the microcontroller 23. The microcontroller 23 communicates with the vehicle body end through the external LIN transceiver 22, the microcontroller 23 communicates with the load driving module 30 through the first CAN transceiver 25, the microcontroller 23 realizes the sleep of the load driving module 30 through the sleep auxiliary circuit 21. The sampling module 24 is connected to the voltage regulation circuit 12 and the first CAN transceiver 25. The sampling module 24 samples the voltage of the voltage regulation circuit 12 and sends the sampling result to the microcontroller 23 through the first CAN transceiver 25. The sampling module 24 and the first CAN transceiver 25 are both connected to the sleep auxiliary circuit 21. The microcontroller 23 can control the sampling module 24 and the first CAN transceiver 25 to disconnect from it through the sleep auxiliary circuit 21.

[0041] The sleep auxiliary circuit 21 is connected to the protection circuit 11. The microcontroller 23 can control the protection circuit 11 to disconnect through the sleep auxiliary circuit 21, and then control the protection circuit 11 to cut off the power supply to the load driving module 30.

[0042] The second CAN transceiver 32 and the lighting load 33 are both connected to the drive controller 31. The drive controller 31 receives the signal of the second CAN transceiver 32 and controls the lighting load 33 to be turned on or off. The drive controller 31 is connected to the voltage regulation circuit 12, and the voltage regulation circuit 12 supplies power to the drive controller 31. The second CAN transceiver 32 is connected to the first CAN transceiver 25 to receive the control signal.

[0043] As Figure 2 shown, the voltage regulation circuit 12 includes a voltage regulator 120. The sampling module 24 and the first CAN transceiver 25 are both connected to the back-end enable switch of the microcontroller 23 through the voltage regulator 120. The sleep auxiliary circuit 21 includes a low-voltage switch 210. The protection circuit 11 includes a high-voltage switch 110. The front-end enable switch of the microcontroller 23 is connected to the high-voltage switch 110 of the protection circuit 11 through the low-voltage switch 210 of the sleep auxiliary circuit 21.

[0044] After being regulated by the high-voltage switch 110, the external power supply is further step-down regulated by the controlled voltage regulator 120 to output a constant voltage for use by the sampling module 24 and the first CAN transceiver 25. Whether the controlled voltage regulator 120 can output depends on the back-end enable switch control of the microcontroller 23, which can cut off the connection between the back-end components and the microcontroller 23 and enable independent power management on the back-end components.

[0045] The sleep assist circuit 21 sets the high-voltage switch 110 in the protection circuit 11, and a low-voltage switch 210 is used to control the on or off switching of the high-voltage switch 110. The low-voltage switch 210 is controlled by the front-end enable switch of the microcontroller 23 to achieve high-voltage control with low voltage and cut off the front-end power supply.

[0046] The present utility model also provides a vehicle lamp, including the system for preventing vehicle lamp sleep failure described above.

[0047] In summary, for the system for preventing vehicle lamp sleep failure of the present utility model, when the microcontroller controls the system to sleep, with the aid of the sleep assist circuit, the circuit control of the back-end sampling module and the first CAN transceiver module can be preferentially turned off, and the connection between the back-end components and the microcontroller can be cut off; subsequently, with the aid of the sleep assist circuit, the circuit control of the protection circuit is turned off, and the front-end power supply is cut off, achieving the purpose of managing the power supply of each component step by step during sleep.

[0048] Cut off sequentially from the low-voltage side to the high-voltage side, so that the sleep process of the system can proceed in an orderly and hierarchical manner, and the components with uncontrollable power supply (such as sampling and internal CAN) are controlled for power supply through the sleep assist circuit. This enables each component module to operate logically during the sleep process, preventing the mutual influence between modules from generating dark current or current backflow, which may affect the microcontroller's control of the sleep process and cause phenomena such as inability to sleep, frequent restart, or excessive static current after sleep. This system makes the sleep of the lamp more stable, and the static current after sleep is also reduced, which will greatly improve the operation quality of the product. It avoids the impact on the whole vehicle caused by uncontrolled or abnormal sleep of the lamp due to faults.

[0049] The vehicle lamp of the present utility model, due to having the system for preventing vehicle lamp sleep failure, therefore, also has the advantages of the system for preventing vehicle lamp sleep failure.

[0050] Each device selected in this application is a general standard part or a component known to those skilled in the art, and its structure and principle can be known by those skilled in the art through technical manuals or by conventional experimental methods.

[0051] In the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0052] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0053] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A system for preventing headlight sleep failure, characterized in that, Comprising: A power supply module (10), a control module (20), and a load driving module (30), wherein the control module (20) is used to control the load driving module (30) to enter the sleep state; The control module (20) includes a sleep assist circuit (21). After the sleep assist circuit (21) disconnects the connection between the control module (20) and the load driving module (30), it disconnects the connection between the power supply module (10) and the load driving module (30) to achieve a fault-free sleep of the system.

2. The system for preventing headlight sleep failure according to claim 1, characterized in that, The power supply module (10) includes: A protection circuit (11) and a voltage regulating circuit (12). The input end of the protection circuit (11) is connected to the vehicle body battery, and the output end of the protection circuit (11) is connected to the voltage regulating circuit (12); Both the control module (20) and the load driving module (30) are connected to the output end of the voltage regulating circuit (12), and the sleep assist circuit (21) is connected to the protection circuit (11).

3. The system for preventing headlight sleep failure according to claim 2, characterized in that, The control module (20) further includes: an external LIN transceiver (22), a microcontroller (23), a sampling module (24), and a first CAN transceiver (25). The external LIN transceiver (22) is connected to the vehicle body side. The external LIN transceiver (22), the sleep assist circuit (21), and the first CAN transceiver (25) are all connected to the microcontroller (23). The sampling module (24) is connected to the first CAN transceiver (25), and both the sampling module (24) and the first CAN transceiver (25) are connected to the sleep assist circuit (21); The sampling module (24) is connected to the voltage regulating circuit (12), and the first CAN transceiver (25) is connected to the load driving module (30).

4. The system for preventing headlight sleep failure according to claim 3, characterized in that, The load driving module (30) includes: A drive controller (31), a second CAN transceiver (32), and a lighting load (33). Both the second CAN transceiver (32) and the lighting load (33) are connected to the drive controller (31); The drive controller (31) is connected to the output end of the voltage regulating circuit (12), and the second CAN transceiver (32) is connected to the first CAN transceiver (25).

5. The system for preventing headlight sleep failure according to claim 3, characterized in that, The voltage regulating circuit (12) includes a voltage regulator (120). Both the sampling module (24) and the first CAN transceiver (25) are connected to the back-end enable switch of the microcontroller (23) through the voltage regulator (120).

6. The system for preventing headlight sleep failure according to claim 5, characterized in that, The sleep assist circuit (21) includes a low-voltage switch (210), and the protection circuit (11) includes a high-voltage switch (110). The front-end enable switch of the microcontroller (23) is connected to the high-voltage switch (110) of the protection circuit (11) through the low-voltage switch (210) of the sleep assist circuit (21).

7. A vehicle lamp, characterized in that, Including the system for preventing headlight sleep failure according to any one of claims 1-6.

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