Automobile tail lamp circuit based on automobile body communication control

Abstract

The utility model provides an automobile tail lamp circuit based on automobile body communication control, which relates to the technical field of automobile lamp control, and comprises a single chip microcomputer circuit, the single chip microcomputer circuit is connected with an automobile body system through a network bus, and the power supply end of the single chip microcomputer circuit is connected with an automobile body power supply; the power supply input end of the CAN transceiver circuit is connected with a vehicle body power supply, and the communication end of the CAN transceiver circuit is connected with the communication end of the single chip microcomputer circuit; the CAN signal receiving end of the tail lamp circuit is connected with the CAN signal transmitting end of the CAN transceiving circuit, and the power supply end of the tail lamp circuit is connected with a vehicle body power supply. The beneficial effects are that communication between a vehicle body system and a taillight circuit is realized, so that a circuit basis is provided for controlling on-off of taillights and turn light LEDs and various animation functions, and the system has the advantages of stability, reliability, low power consumption, high fault tolerance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle light control, in particular to a vehicle tail light circuit based on vehicle body communication control. Background Art

[0002] Over the past century since the birth of the automobile, it has been deeply integrated into people's daily lives and has become an indispensable means of transportation. As one of its important safety components, automobile taillights have also undergone a significant evolution from initial application to diversified development.

[0003] In the early days, automotive taillights primarily used halogen bulbs and had relatively simple designs. Their primary function was to respond to signals from the vehicle body, turning the taillights, brake lights, and turn signals on and off. Taillight circuits during this period were mostly basic switch circuits with limited functionality and certain limitations.

[0004] However, with the increasing popularity of electrical circuits and the continuous enrichment of the shapes of car taillights on the road, traditional car taillights have long failed to meet people's personalized pursuit of shape and style. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a car taillight circuit based on vehicle body communication control, comprising:

[0006] A single-chip microcomputer circuit, wherein the single-chip microcomputer circuit is connected to the vehicle body system via a network bus, and a power supply terminal of the single-chip microcomputer circuit is connected to a vehicle body power supply;

[0007] A CAN transceiver circuit, wherein a power input terminal of the CAN transceiver circuit is connected to a vehicle body power supply, and a communication terminal of the CAN transceiver circuit is connected to a communication terminal of the single-chip microcomputer circuit;

[0008] At least one taillight circuit, a CAN signal receiving end of the taillight circuit is connected to the CAN signal transmitting end of the CAN transceiver circuit, and a power supply end of the taillight circuit is connected to the vehicle body power supply.

[0009] Preferably, it also includes an anti-reverse switch circuit, the power input end of the anti-reverse switch circuit is connected to the vehicle body power supply, and the output end of the anti-reverse switch circuit is respectively connected to the power end of the single-chip microcomputer circuit, the power input end of the CAN transceiver circuit and the power end of the taillight circuit.

[0010] Preferably, it further comprises a linear voltage stabilizing circuit, wherein the input end of the linear voltage stabilizing circuit is connected to the vehicle body power supply, and the output end of the linear voltage stabilizing circuit is connected to the power input end of the CAN transceiver circuit.

[0011] Preferably, the taillight circuit includes:

[0012] a step-down circuit, wherein a power input terminal of the step-down circuit is connected to the vehicle body power supply;

[0013] There are multiple LED circuits, the CAN signal receiving end of each LED circuit is connected to the CAN signal sending end of the CAN transceiver circuit, and the power input end of each LED circuit is connected to the power output end of the step-down circuit.

[0014] Preferably, each of the LED circuits comprises:

[0015] A plurality of LED light groups, wherein the positive electrodes of the LED light groups are connected to the power output end of the step-down circuit;

[0016] Multiple LED driver chips, the CAN signal receiving end of the LED driver chip is connected to the CAN signal sending end of the CAN transceiver circuit, the power input end of the LED driver chip is connected to the power output end of the step-down circuit, and the output end of each LED driver chip is connected to the negative electrode of at least one group of LED lamp groups.

[0017] Preferably, each LED lamp group includes at least two LED lamps connected in series.

[0018] Preferably, the anti-reverse switching circuit includes a diode, the cathode of the diode serves as the power output end of the anti-reverse switching circuit, and the anode of the diode is connected to the vehicle body power supply through two parallel power lines.

[0019] The above technical solution has the following advantages or beneficial effects: it realizes communication between the vehicle body system and the taillight circuit, thereby providing a circuit basis for controlling the taillight and turn signal LEDs to realize the lighting and various animation functions, and has the advantages of stability, reliability, low power consumption, and high fault tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 In a preferred embodiment of the present utility model, a circuit diagram of a car taillight circuit based on vehicle body communication control is provided;

[0021] Figure 2 This is a circuit diagram of an anti-reverse switch circuit in a preferred embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also fall within the scope of the present invention as long as they conform to the main purpose of the present invention.

[0023] In a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, a vehicle taillight circuit based on vehicle body communication control is provided, comprising:

[0024] A single-chip microcomputer circuit 1, wherein the single-chip microcomputer circuit 1 is connected to a vehicle body system 2 via a network bus, and a power supply terminal of the single-chip microcomputer circuit 1 is connected to a vehicle body power supply VCC;

[0025] CAN transceiver circuit 3, wherein the power input terminal of the CAN transceiver circuit is connected to the vehicle body power supply, and the communication terminal TXD / RXD of the CAN transceiver circuit is connected to the communication terminal of the single-chip microcomputer circuit;

[0026] At least one taillight circuit 4, a CAN signal receiving end of the taillight circuit is connected to the CAN signal sending end CANH / CANL of the CAN transceiver circuit, and a power supply end of the taillight circuit 4 is connected to the vehicle body power supply VCC.

[0027] Specifically, this embodiment provides a car taillight circuit. Based on the car taillight circuit, the body system can send LIN / CAN messages to the single-chip microcomputer circuit through the network bus (including CANH, CANL, LIN). After receiving the LIN / CAN message, the single-chip microcomputer circuit will also feedback the LIN / CAN protocol to the body system. The single-chip microcomputer circuit converts the received LIN / CAN signal into a UART signal, and then converts it into a CAN signal through a CAN transceiver to communicate with the taillight circuit to light up the taillight or turn signal, thereby realizing communication between the body system and the taillight circuit, and realizing that only one single-chip microcomputer circuit controls multiple taillight circuits, thereby providing a circuit basis for controlling the taillight and turn signal LEDs to realize the lighting and various animation functions, and has the advantages of stability, reliability, low power consumption, high fault tolerance, single master and multiple slaves, etc.

[0028] In a preferred embodiment of the present invention, an anti-reverse switch circuit 5 is further included, wherein the power input end of the anti-reverse switch circuit 5 is connected to the vehicle body power supply VCC, and the output end of the anti-reverse switch circuit 5 is respectively connected to the power end of the single-chip microcomputer circuit 1, the power input end of the CAN transceiver circuit 3 and the power end of the taillight circuit 4.

[0029] In this embodiment, Figure 2 As shown, the anti-reverse switch circuit 5 includes a diode D1, the cathode of the diode D1 serves as the power output end of the anti-reverse switch circuit 5, and the anode of the diode D1 is connected to the vehicle body power supply VCC through two parallel power lines A.

[0030] Specifically, in this embodiment, the anti-reverse switch circuit 5 is arranged between the vehicle body power supply VCC and the power supply end of the single-chip circuit 1, the power input end of the CAN transceiver circuit 3 and the power supply end of the taillight circuit 5, to prevent the vehicle body power supply VCC from being reversely connected, thereby preventing damage to the lamps and circuit components.

[0031] In a preferred embodiment of the present invention, a linear voltage regulator circuit 6 is further included, wherein the input end of the linear voltage regulator circuit 6 is connected to the vehicle body power supply VCC, and the output end of the linear voltage regulator circuit 6 is connected to the power input end of the CAN transceiver circuit 3.

[0032] Specifically, in this embodiment, the linear voltage regulator circuit 6 is used to provide a stable 5V constant voltage state for the CAN transceiver circuit 3. The linear voltage regulator circuit 6 is connected to the vehicle body power supply VCC. After the vehicle body is started, the output end of the linear voltage regulator circuit 6 can quickly power the chip in the CAN transceiver circuit 3, ensuring a short communication time.

[0033] In combination with the above embodiment, when the anti-reverse switching circuit 5 is provided, the input end of the linear voltage stabilizing circuit 6 is connected to the output end of the anti-reverse switching circuit 5 .

[0034] In a preferred embodiment of the present invention, Figure 1 As shown, the taillight circuit 4 includes:

[0035] A step-down circuit 41 , wherein a power input terminal of the step-down circuit 41 is connected to the vehicle body power supply VCC;

[0036] There are multiple LED circuits 42 , and the CAN signal receiving end of each LED circuit 42 is connected to the CAN signal sending end of the CAN transceiver circuit 3 . The power input end of each LED circuit 42 is connected to the power output end of the step-down circuit 41 .

[0037] In this embodiment, each of the LED circuits 42 includes:

[0038] Multiple LED light groups 421, wherein the positive electrodes of the LED light groups 421 are connected to the power output end of the step-down circuit 41;

[0039] Multiple LED driver chips 422, the CAN signal receiving end of the LED driver chip 422 is connected to the CAN signal sending end of the CAN transceiver circuit 3, the power input end of the LED driver chip 422 is connected to the power output end of the step-down circuit 41, and the output end of each LED driver chip 422 is connected to the negative pole of at least one group of LED light groups 421.

[0040] In this embodiment, each LED lamp group 421 includes at least two LED lamps connected in series.

[0041] Specifically, this embodiment includes multiple taillight circuits 4, enabling one single-chip microcomputer circuit to control multiple taillights, with the advantages of low cost, high performance, and a single-master-multiple-slave structure. The DC-DC buck circuit 41 provides a constant voltage power supply to the LED driver chip 422, keeping the LED driver chip 422 in a constant voltage and stable state.

[0042] In addition, each taillight circuit 4 includes multiple LED driver chips 422, each LED driver chip 422 is connected to multiple LED light groups 421, and each LED light group 421 includes at least two LED lights connected in series, which ensures the number of LED lights and provides a hardware foundation for realizing the turning on and off of the taillights and various animation functions.

[0043] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A car taillight circuit based on vehicle body communication control, characterized in that: include: A single-chip microcomputer circuit, wherein the single-chip microcomputer circuit is connected to the vehicle body system via a network bus, and a power supply terminal of the single-chip microcomputer circuit is connected to a vehicle body power supply; A CAN transceiver circuit, wherein a power input terminal of the CAN transceiver circuit is connected to a vehicle body power supply, and a communication terminal of the CAN transceiver circuit is connected to a communication terminal of the single-chip microcomputer circuit; At least one taillight circuit, a CAN signal receiving end of the taillight circuit is connected to the CAN signal transmitting end of the CAN transceiver circuit, and a power supply end of the taillight circuit is connected to the vehicle body power supply.

2. The automobile taillight circuit according to claim 1, characterized in that: It also includes an anti-reverse switch circuit, the power input end of the anti-reverse switch circuit is connected to the vehicle body power supply, and the output end of the anti-reverse switch circuit is respectively connected to the power end of the single-chip microcomputer circuit, the power input end of the CAN transceiver circuit and the power end of the taillight circuit.

3. The automobile taillight circuit according to claim 1, characterized in that: It also includes a linear voltage stabilizing circuit, the input end of the linear voltage stabilizing circuit is connected to the vehicle body power supply, and the output end of the linear voltage stabilizing circuit is connected to the power input end of the CAN transceiver circuit.

4. The automobile taillight circuit according to claim 1, characterized in that: The taillight circuit includes: a step-down circuit, wherein a power input terminal of the step-down circuit is connected to the vehicle body power supply; There are multiple LED circuits, the CAN signal receiving end of each LED circuit is connected to the CAN signal sending end of the CAN transceiver circuit, and the power input end of each LED circuit is connected to the power output end of the step-down circuit.

5. The automobile taillight circuit according to claim 4, characterized in that: Each of the LED circuits comprises: A plurality of LED light groups, wherein the positive electrodes of the LED light groups are connected to the power output end of the step-down circuit; Multiple LED driver chips, the CAN signal receiving end of the LED driver chip is connected to the CAN signal sending end of the CAN transceiver circuit, the power input end of the LED driver chip is connected to the power output end of the step-down circuit, and the output end of each LED driver chip is connected to the negative electrode of at least one group of LED lamp groups.

6. The automobile taillight circuit according to claim 5, characterized in that: Each LED lamp group includes at least two LED lamps connected in series.

7. The automobile taillight circuit according to claim 2, characterized in that: The anti-reverse switching circuit includes a diode, the cathode of the diode serves as the power output end of the anti-reverse switching circuit, and the anode of the diode is connected to the vehicle body power supply through two parallel power lines.

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