Car lamp control device and method

Abstract

The invention relates to a vehicle lamp control device which comprises a plurality of lamp bead modules connected in series, and each lamp bead module is provided with a first communication port and a second communication port; the master controller is used for generating an instruction, sending the instruction to the lamp bead module and receiving data fed back by the lamp bead module; the communication line comprises a sending line and a receiving line, one end of the sending line is connected with the signal output end of the main controller, and the other end of the sending line is connected with the first communication port of the first lamp bead module; one end of the receiving line is connected with the signal receiving end of the master controller, and the other end of the receiving line is connected with the second communication port of the tail lamp bead module. According to the vehicle lamp control device, communication between the main controller and the multiple lamp bead modules is achieved in a two-wire connection mode, compared with a mode that multiple lamp beads need to independently control signal wires in a traditional scheme, the number of wire harnesses is greatly reduced, the wiring cost and complexity are reduced, meanwhile, the fault risk caused by too many circuits is also reduced, and the reliability of the vehicle lamp control device is improved. And the reliability of the system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automotive electronic control technology, in particular to a vehicle lamp control device and method. BACKGROUND

[0002] In the field of vehicle lighting and decorative light control, with the continuous increase of vehicle functions and the development of intelligentization, the role of vehicle lamps has long been limited to simple lighting, and also involves the aesthetics, safety and driving experience of the vehicle. Therefore, higher requirements are put forward for the control mode of vehicle lamps, which need to realize the functions of brightness adjustment, color control and real-time state monitoring of multiple lamp beads to meet the needs of different scenes, while also taking into account the cost, expandability and reliability of the system.

[0003] However, the traditional vehicle lamp control scheme has many problems in actual application. On the one hand, the wiring is complex, and multiple lamp beads need independent control signal lines, which leads to an increase in the number of wire harnesses, increasing the cost and assembly difficulty, and easily causing line faults and other problems. On the other hand, when the number or function of the lamp beads needs to be changed, the circuit often needs to be redesigned, which lacks flexibility, and in addition, the diagnostic function is weak, making it difficult to monitor the working state of the lamp beads in real time, such as fault conditions, temperature, etc. Once the lamp beads are abnormal, it is difficult to discover and handle in time, affecting the normal operation of the vehicle lamp system and the safety of the vehicle. SUMMARY

[0004] The present application provides a vehicle lamp control device to solve the above problems.

[0005] In a first aspect, the present application provides a vehicle lamp control device, comprising: a plurality of serially connected lamp bead modules, each of which is provided with a first communication port and a second communication port; a master controller for generating instructions and sending instructions to the lamp bead modules, while receiving data feedback from the lamp bead modules; a communication line including a sending line and a receiving line, one end of the sending line being connected to the signal output end of the master controller, and the other end being connected to the first communication port of the first lamp bead module; one end of the receiving line being connected to the signal receiving end of the master controller, and the other end being connected to the second communication port of the last lamp bead module.

[0006] In combination with the first aspect, in an implementation manner, the first communication port includes a first sending pin and a first receiving pin, and one end of the sending line connected to the first communication port is connected to the first sending pin; the second communication port includes a second sending pin and a second receiving pin, and one end of the receiving line connected to the second communication port is connected to the second receiving pin.

[0007] In combination with the first aspect, in an implementation, the adjacent lamp bead modules are connected by the following manner: the second sending pin of the previous lamp bead module is connected with the first sending pin of the next lamp bead module; the second receiving pin of the previous lamp bead module is connected with the first receiving pin of the next lamp bead module.

[0008] In combination with the first aspect, in an implementation, the master controller sends an instruction frame containing a target address and control parameters to the lamp bead module through a sending line, the instruction frame adopts an improved UART protocol or a SWIRE single-wire protocol, and the instruction frame sequentially includes a start bit, an address segment, a data segment and a check bit.

[0009] In combination with the first aspect, in an implementation, each lamp bead module includes a lamp bead and a driving chip, the driving chip is built-in address coding, and the master controller assigns an address through a broadcast instruction or writes an address through a serial signal step by step.

[0010] In combination with the first aspect, in an implementation, each lamp bead module further includes a detection circuit, which is used for monitoring working current, voltage and temperature of the lamp bead in real time, and feeding back an abnormal state signal to the master controller through a receiving line.

[0011] In combination with the first aspect, in an implementation, the lamp bead module further includes a fault bypass circuit, when the lamp bead module fails, the fault bypass circuit can make the first sending pin and the second sending pin directly communicate, and the first receiving pin and the second receiving pin directly communicate.

[0012] In combination with the first aspect, in an implementation, the lamp bead is an RGB lamp bead, and the driving chip realizes color switching of the lamp bead through a color mixing algorithm according to a red, green and blue component value signal sent by the master controller.

[0013] In combination with the first aspect, in an implementation, the master controller is further provided with a CAN line interface, a power supply interface and a grounding interface.

[0014] Secondly, the application embodiment provides a control method of a vehicle lamp control device, including the following steps: the master controller scans a communication line, and assigns an address to each lamp bead module and establishes a communication connection through a sending line; the master controller sends a control signal containing a target address and control parameters through a sending line; the lamp bead module of the target address receives and analyzes the control signal, and adjusts corresponding brightness and color according to the analysis result, and the lamp bead module of a non-corresponding address ignores the control signal; The lamp bead module feeds back working state data of itself to the master controller through a receiving line, the master controller analyzes the received state feedback data, judges whether the lamp bead module is abnormal, and triggers an alarm or performs a protection action if abnormal; When one of the lamp bead modules fails, the first communication port and the second communication port thereof are directly connected, ensuring normal communication of other lamp bead modules.

[0015] The technical scheme provided by the embodiment of the application has the following beneficial effects: 1. The vehicle lamp control device and method, by adopting a two-wire connection mode to realize communication between the master controller and multiple lamp bead modules, compared with the traditional scheme in which multiple lamp beads need independent control signal lines, greatly reduces the number of wire harnesses, reduces wiring cost and complexity, and also reduces the risk of failure caused by too many lines, improving the reliability of the system.

[0016] 2. The vehicle lamp control device and method, adjacent lamp bead modules are connected in series through a specific pin connection mode, and the master controller can send an instruction frame containing a target address and control parameters to the lamp bead module through the sending line to control each lamp bead module, this design enables the system to support dynamically increasing or decreasing the number of lamp bead modules, and only needs to reallocate the address through the master controller without modifying the hardware architecture, has strong expansibility, and can flexibly adapt to different vehicle models or different lighting demand scenarios.

[0017] 3. The vehicle lamp control device and method, when one of the lamp bead modules fails, the first communication port and the second communication port thereof are directly connected, ensuring normal communication of other lamp bead modules, avoiding the problem of interruption of the entire communication link caused by failure of a single lamp bead module, and further improving the communication reliability and stability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a schematic diagram of the connection between the master controller and the lamp bead module of the application. Figure 2 It is a schematic diagram of the first communication port and the second communication port of the lamp bead module of the application.

[0020] In the figure: 1, lamp bead module; 2, main control unit; 3, sending line; 4, receiving line; 5, power supply interface; 6, grounding interface; 7, CAN line interface; 801, first sending pin; 802, first receiving pin; 901, second sending pin; 902, second receiving pin. DETAILED DESCRIPTION

[0021] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of protection of the present application.

[0022] Please refer to Figure 1 and Figure 2 The embodiments of the present application provide a vehicle lamp control device, comprising: A plurality of lamp bead modules 1 connected in series, each of which is provided with a first communication port and a second communication port; Specifically, the first communication port comprises a first sending pin 801 and a first receiving pin 802; and the second communication port comprises a second sending pin 901 and a second receiving pin 902.

[0023] A main control unit 2 for generating instructions and sending the instructions to the lamp bead modules 1, and receiving the data fed back by the lamp bead modules 1; In addition, the main control unit 2 is further provided with a CAN line interface 7 for realizing the communication between the main control unit 2 and other electronic control units of the vehicle.

[0024] A power supply interface 5 for providing stable power input for the main control unit 2.

[0025] A grounding interface 6 for grounding the circuit of the main control unit 2; A communication line comprising a sending line 3 and a receiving line 4, one end of the sending line 3 being connected with the signal output end of the main control unit 2, and the other end being connected with the first sending pin 801 of the first lamp bead module 1; one end of the receiving line 4 being connected with the signal receiving end of the main control unit 2, and the other end being connected with the second receiving pin 902 of the last lamp bead module 1.

[0026] In addition, the second sending pin 901 of the previous lamp bead module 1 is connected with the first sending pin 801 of the next lamp bead module 1; The second receiving pin 902 of the previous lamp bead module 1 is connected with the first receiving pin 802 of the next lamp bead module 1.

[0027] The communication between the master controller 2 and the plurality of lamp bead modules 1 is realized by adopting a two-wire connection mode of the sending line 3 and the receiving line 4, compared with the mode that a plurality of lamp beads need independent control signal lines in the traditional scheme, the number of wire harnesses is greatly reduced, the wiring cost and complexity are reduced, and the failure risk caused by too many lines is also reduced, and the reliability of the system is improved.

[0028] In the embodiment, the master controller 2 sends an instruction frame containing a target address and a control parameter to the lamp bead module 1 through the sending line 3, the instruction frame adopts an improved UART protocol or a SWIRE single-wire protocol, and the instruction frame sequentially includes a start bit, an address segment, a data segment and a check bit.

[0029] In the embodiment, each lamp bead module 1 includes: A driving chip: the driving chip is built-in with a unique address code, the master controller 2 assigns an address through a broadcast instruction or writes an address through a serial signal step by step; A lamp bead: the lamp bead is an RGB lamp bead, and the driving chip realizes color switching of the lamp bead through a color mixing algorithm according to a red, green and blue component value signal sent by the master controller 2; A detection circuit: the detection circuit is used for monitoring working current, voltage and temperature of the lamp bead in real time, and feeding back an abnormal state signal to the master controller 2 through the receiving line 4; A fault bypass circuit: when the lamp bead module 1 fails, the fault bypass circuit can make the first sending pin 801 and the second sending pin 901 directly communicate, and the first receiving pin 802 and the second receiving pin 902 directly communicate.

[0030] Through the set fault bypass circuit, when one of the lamp bead modules 1 fails, the first sending pin 801 and the second sending pin 901 are directly conducted, and the first receiving pin 802 and the second receiving pin 902 are directly conducted, so that normal communication of other lamp bead modules 1 can be ensured, and the problem that the whole communication link is interrupted due to failure of a single lamp bead module 1 is avoided, and the communication reliability and stability of the system are further improved.

[0031] The embodiment also provides a control method of the vehicle lamp control device, and specifically includes the following steps: The master controller 2 scans the communication line, and assigns an address for each lamp bead module 1 and establishes a communication connection through the sending line 3, so that the master controller 2 can control different lamp bead modules 1 according to different addresses; The master controller 2 sends a control signal containing a target address and a control parameter through the sending line 3; The control parameter includes a brightness parameter and red, green and blue component value parameters, and is used for respectively controlling brightness and color of the lamp bead module 1 with the target address; The lamp bead module 1 of the target address receives and analyzes the control signal, and adjusts the corresponding brightness and color according to the analysis result, and the lamp bead module 1 of the non-corresponding address ignores the control signal; The lamp bead module 1 feeds back the working state data to the main controller 2 through the receiving line 4, and the main controller 2 analyzes the received state feedback data to determine whether the lamp bead module 1 is abnormal, and triggers an alarm or performs a protection action if it is abnormal; Specifically, if the alarm is triggered: the main controller 2 processes the received state feedback data and finds that it is abnormal, the main controller 2 will transmit the signal to other electronic control units of the automobile through the CAN line connected with the CAN line interface 7, so as to remind the driver that the lamp bead module is malfunctioning; If the protection action is performed; the fault bypass circuit on the fault position lamp bead module 1 will make the first sending pin 801 and the second sending pin 901 on the fault position lamp bead module 1 directly conduct, and the first receiving pin 802 and the second receiving pin 902 directly conduct, thereby ensuring the normal communication of other lamp bead modules 1 and ensuring the normal use of other position lamp bead modules 1, avoiding the problem of interruption of the entire communication link caused by failure of a single lamp bead module 1.

[0032] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0033] It has to be noted that, in the present application, the terms "first", "second", etc. are used merely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0034] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle lighting control device, characterized in that, include: Multiple LED modules (1) connected in series, each of the LED modules (1) is provided with a first communication port and a second communication port; The main controller (2) is used to generate instructions and send instructions to the LED module (1), and at the same time receive data fed back by the LED module (1); The communication line includes a transmitting line (3) and a receiving line (4). One end of the transmitting line (3) is connected to the signal output terminal of the main controller (2), and the other end is connected to the first communication port of the first LED module (1). One end of the receiving line (4) is connected to the signal receiving terminal of the main controller (2), and the other end is connected to the second communication port of the last LED module (1).

2. The vehicle lighting control device according to claim 1, characterized in that, The first communication port includes a first transmit pin (801) and a first receive pin (802), and one end of the transmit line (3) connected to the first communication port is connected to the first transmit pin (801); the second communication port includes a second transmit pin (901) and a second receive pin (902), and one end of the receive line (4) connected to the second communication port is connected to the second receive pin (902).

3. The vehicle lighting control device according to claim 2, characterized in that, The adjacent LED modules (1) are connected in the following manner: The second transmitting pin (901) of the previous LED module (1) is connected to the first transmitting pin (801) of the next LED module (1); The second receiving pin (902) of the previous LED module (1) is connected to the first receiving pin (802) of the next LED module (1).

4. The vehicle lighting control device according to claim 1, characterized in that, The main controller (2) sends an instruction frame containing the target address and control parameters to the LED module (1) via the transmission line (3). The instruction frame adopts the improved UART protocol or the SWIRE single-wire protocol. The instruction frame includes, in sequence, a start bit, an address segment, a data segment, and a parity bit.

5. A vehicle lighting control device according to claim 2, characterized in that, Each of the lamp bead modules (1) includes a lamp bead and a driver chip. The driver chip has a built-in address code. The main controller (2) assigns an address through a broadcast instruction or writes the address step by step through a serial signal.

6. A vehicle lighting control device according to claim 5, characterized in that, Each of the lamp bead modules (1) also includes a detection circuit, which is used to monitor the working current, voltage and temperature of the lamp bead in real time, and to feed back abnormal status signals to the main controller (2) through the receiving line (4).

7. A vehicle lighting control device according to claim 5, characterized in that, The lamp module (1) also includes a fault bypass circuit. When the lamp module (1) fails, the fault bypass circuit enables the first transmitting pin (801) to be directly connected to the second transmitting pin (901) and the first receiving pin (802) to be directly connected to the second receiving pin (902).

8. A vehicle lighting control device according to claim 5, characterized in that, The LED is an RGB LED. The driver chip switches the LED colors according to the red, green and blue component signals sent by the main controller (2) through a color mixing algorithm.

9. A vehicle lighting control device according to claim 1, characterized in that, The main controller (2) is also equipped with a CAN line interface (7), a power interface (5) and a ground interface (6).

10. A control method for a vehicle lighting control device, characterized in that, Includes the following steps; The main controller (2) scans the communication lines and assigns an address to each LED module (1) and establishes a communication connection via the transmission line (3); The main controller (2) sends a control signal containing the target address and control parameters through the transmission line (3); The LED module (1) at the target address receives and parses the control signal, and adjusts the corresponding brightness and color according to the parsing result. The LED module (1) at a non-corresponding address ignores the control signal. The LED module (1) feeds back its working status data to the main controller (2) through the receiving line (4). The main controller (2) analyzes the received status feedback data and determines whether the LED module (1) is malfunctioning. If it is malfunctioning, it triggers an alarm or performs a protection action. When one of the LED modules (1) fails, its first and second communication ports are directly connected to ensure normal communication of the other LED modules (1).

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