Vehicle lamp controller and vehicle lamp control system

Abstract

The utility model discloses a vehicle lamp controller and a vehicle lamp control system. The vehicle lamp controller comprises: a microcontroller; the PWM capture circuit is connected with the microcontroller, and the input end of the PWM capture circuit receives an external PWM input signal; the first input end of the analog-to-digital acquisition circuit receives the voltage of a steering lamp channel, the second input end of the analog-to-digital acquisition circuit receives the power input of a lamp panel, and the first output end and the second output end of the analog-to-digital acquisition circuit are connected with the microcontroller; the power management circuit is connected with the microcontroller; the first CAN conversion circuit is connected with the power management circuit; the second CAN conversion circuit is connected with the microcontroller; the input end of the constant voltage source output circuit is connected with the power management circuit, and the output end of the constant voltage source output circuit outputs constant voltage; and the high-side switch is connected with the power management circuit and outputs one or more dummy load control signals. Therefore, the main controller can be used as a supplement of the original main controller in mass production, and the risk of changing the main controller in mass production is reduced.

Description

[Technical field]

[0001] The utility model relates to the technical field of automobiles, in particular to a vehicle light controller and a vehicle light control system. [Background technology]

[0002] As an important member in the history of automobile development, headlights play a vital role in automobile driving safety. There are many types of headlights, from simple lighting at the beginning to various lighting modes with various functions, such as high and low beam lights, turn signals (TI), parking lights (PL), position lights (PL), and daytime running lights (DRL). These functions are designed and used to meet the safety performance of the vehicle. With the rapid development of the times, users' demands for other aspects of headlights are also increasing, and various lighting functions are also developing. At present, some solutions add grille light functions on the basis of the original headlights to form an animation effect similar to flowing lights to meet the visual needs of customers.

[0003] An article titled "A System Design Scheme for Intelligent Cockpit Welcome Lights" was published in the journal "Automotive Electrical Appliances" in July 2023. It disclosed a scheme of using a gateway control module to receive the front and rear headlight welcome light signals, and then using the gateway control module to drive the headlight control module to play the headlight welcome light. However, this scheme requires a unified upgrade of the entire vehicle light control system, which is bound to cause problems such as greater difficulty in development and verification, long development cycle, and high development costs. [Contents of the utility model]

[0004] The utility model aims to provide a vehicle light controller and a vehicle light control system, which can be improved on the basis of the original vehicle light control scheme to achieve a new vehicle light control effect.

[0005] To achieve the above-mentioned purpose, the utility model provides a vehicle light controller, which includes: a microcontroller; a PWM capture circuit, whose input end receives an external PWM input signal and whose output end is connected to the microcontroller; an analog-to-digital acquisition circuit, whose first input end receives the turn signal channel voltage, whose second input end receives the light board power input, and whose first output end and second output end are both connected to the microcontroller; a power management circuit connected to the microcontroller; a first CAN conversion circuit connected to the power management circuit; a second CAN conversion circuit connected to the microcontroller; a constant voltage source output circuit, whose input end is connected to the power management circuit and whose output end outputs a constant voltage; a high-side switch connected to the power management circuit, which outputs one or more dummy load control signals.

[0006] According to another aspect of the utility model, the utility model provides a vehicle light control system, which includes: a main controller; one or more dummy load circuits; one or more first LED light channels, each first LED light channel corresponds to a dummy load circuit and includes multiple cascaded first LED lights, the main controller provides a constant current to the corresponding first LED light channel through each dummy load circuit; one or more first LED driver management chip circuits, each first LED driver management chip circuit is connected to a corresponding first LED light channel; the vehicle light controller described above, wherein each dummy load control signal is output to the corresponding dummy load circuit, and the output constant voltage is provided to each first LED driver management chip circuit, the main controller provides the vehicle light controller with a PWM input signal, a turn signal channel voltage, and a light board power input; a first CAN transceiver circuit, which is connected between the first CAN conversion circuit and each first LED driver management chip circuit; a second LED light board connected to the second CAN conversion circuit.

[0007] Compared with the prior art, the vehicle light controller proposed by the utility model can work in conjunction with the original main controller to achieve new vehicle light effects and reduce the risk of changing the main controller for mass production.

Brief Description of the Drawings

[0008] The present invention will be more easily understood with reference to the accompanying drawings and the following detailed description, wherein the same reference numerals correspond to the same structural components, wherein:

[0009] Figure 1 This is a circuit diagram of a vehicle light control system in one embodiment of the present utility model;

[0010] Figure 2 This is a structural diagram of a vehicle light controller in one embodiment of the utility model;

[0011] Figure 3 for Figure 2 Circuit diagram of part of the circuit of the headlight controller;

[0012] Figure 4 for Figure 2 A circuit diagram of another part of the circuit of the headlight controller;

[0013] Figure 5 for Figure 2 Circuit diagram of the microcontroller in the headlight controller. [Specific embodiment]

[0014] Some embodiments of the present invention will be described more fully below with reference to the accompanying drawings, in which some embodiments are listed, but not all. In fact, various embodiments of the present invention can be embodied in many different forms and should not be construed as limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. For example, unless otherwise stated, referring to something as first, second, etc. should not be construed as implying a particular order. In addition, something may be described as being higher than something (unless otherwise stated) when it is actually lower than something, or vice versa; similarly, something described as being on the left may be on the right, or vice versa. The same reference figure number always represents the same element.

[0015] In combination with the accompanying drawings and the description of the specific embodiments of the present invention, the details of the present invention can be more clearly understood. However, the specific embodiments of the present invention described herein are only used to explain the purpose of the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "disposed on" another element, it can be directly on the other element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0017] The utility model provides a vehicle lamp control system 10, which can be improved on the basis of the original vehicle lamp control scheme to achieve new vehicle lamp lighting effects, such as animation effects.

[0018] Figure 1FIG. 1 is a circuit diagram of a vehicle light control system 10 in one embodiment of the present invention. Figure 1 As shown, the vehicle light control system 10 includes a main controller 200, one or more fake load circuits (Fakeload) 440, one or more first LED light channels 430, one or more first LED driver management chip circuits 420, a vehicle light controller 100, a first CAN (Controller Area Network) transceiver circuit 410, and a second LED light board 300. Figure 1 Three dummy load circuits 440 are shown in the figure, but in other embodiments, the number of dummy load circuits 440 may be other numbers. Figure 1 Two first LED driving management chip circuits 420 and two first LED lamp channels 430 are shown in the figure. In other embodiments, the number may be other numbers.

[0019] The vehicle light control system 10 further includes a power supply circuit 210 and a vehicle body bus 220 connected to the main controller 200. The main controller 200 may be a controller of a mass-produced vehicle light. The power supply circuit 210 provides power to the main controller 200. The vehicle body bus 220 may be connected to a central control system of a vehicle.

[0020] Each first LED lamp channel 430 corresponds to a dummy load circuit 440. Each first LED lamp channel 430 includes a plurality of cascaded first LED lamps. The main controller 200 provides a constant current to the corresponding first LED lamp channel 430 through each dummy load circuit 440. Each first LED lamp channel 430 can also be referred to as a DRL / PO lamp board, or all first LED lamp channels 430 can be referred to as a DRL / PO lamp board. The DRL / PO lamp board may include one or more of a daytime running lamp DRL, a position lamp PO, a parking lamp PL, and a turn signal lamp TI.

[0021] Each first LED driving management chip circuit 420 is connected to a corresponding first LED lamp channel, and is used to drive and manage the corresponding first LED lamp channel. Each first LED driving management chip circuit 420 can control whether the first LED lamp in the first LED lamp channel is lit.

[0022] The vehicle light controller 100 receives the PWM (Pulse Width Modulation) input signal, the turn signal channel voltage, the light board power input and the product power input provided by the main controller 200 through a connection. The vehicle light controller 100 outputs one or more dummy load control signals, and each dummy load control signal is output to the corresponding dummy load circuit 440 to control the dummy load circuit 440. The vehicle light controller 100 also outputs a constant voltage to each first LED driver management chip circuit 420 to power the first LED driver management chip circuit 420. The constant voltage can be 5V or other voltage values. The vehicle light controller 100 provides the constant voltage to the first CAN transceiver circuit 410 to power the first CAN transceiver circuit 410.

[0023] The first CAN transceiver circuit 410 is connected between the first CAN conversion circuit of the vehicle light controller 100 and each first LED drive management chip circuit 420 to achieve communication between the vehicle light controller 100 and each first LED drive management chip circuit 420. With the help of the first CAN transceiver circuit 410, the vehicle light controller 100 can control whether each first LED lamp in the DRL / PO lamp board is lit and when and how to light it.

[0024] The second CAN conversion circuit of the vehicle light controller 100 is connected to the second CAN transceiver circuit 310 of the second LED light board 300 to achieve communication between the vehicle light controller 100 and the second LED light board 300. With the help of the second CAN transceiver circuit 310, the vehicle light controller 100 can control whether each LED light in the second LED light board 300 is lit and when and how to light it.

[0025] The second LED light board 300 includes a second LED driver management chip circuit 320, a plurality of second LED light channels 330, a second CAN transceiver circuit 310 connected between the second CAN conversion circuit of the vehicle light controller 100 and the second LED driver management chip circuit 320, and a buck circuit 340. Each second LED light channel 330 includes a cascaded second LED light, and the second LED driver management chip circuit 320 is connected to each second LED light channel 330. The main controller 200 provides the buck circuit 340 with a light board power input. The buck circuit 340 provides a power supply voltage to the second LED driver management chip circuit 320 according to the light board power input. The second LED driver management chip circuit 320 can control whether the LED light in each second LED light channel 330 is lit. The second LED light of the second LED light board 300 can be a grille light. Preferably, the grille light can play various animations or cooperate with other lights to play various animations, such as playing welcome words such as welcome home.

[0026] Figure 2 FIG. 1 is a structural diagram of a vehicle light controller 100 in one embodiment of the present invention. Figure 2 As shown, the vehicle light controller 100 includes a microcontroller 190, a PWM capture circuit 110, an analog-to-digital acquisition circuit 120, an input voltage circuit 140, an input detection circuit 130, a high-side switch 150, a constant voltage source output circuit 160, a first CAN conversion circuit 170, a second CAN conversion circuit 180 and a power management circuit 195.

[0027] The input end of the PWM capture circuit 110 receives the PWM input signal input by the main controller 200, and the output end thereof is connected to the microcontroller 190. The first input end of the analog-to-digital acquisition circuit 120 receives the turn signal channel voltage input by the main controller 200, and the second input end thereof receives the light board power input input by the main controller 200, and the first output end and the second output end thereof are both connected to the microcontroller 190.

[0028] The power management circuit 195 is connected to the microcontroller 190. Specifically, the power management circuit 195 is connected to the microcontroller 190 via an SPI interface and a CAN interface. The first CAN conversion circuit 170 is connected to the power management circuit 195. The second CAN conversion circuit 180 is connected to the microcontroller 190. The input end of the constant voltage source output circuit 160 is connected to the power management circuit 195, and its output end outputs a constant voltage. The high side switch 150 is connected to the power management circuit 195, and outputs one or more dummy load control signals.

[0029] The input end of the input voltage circuit 140 receives the product power input input by the main controller 200, and the output end thereof is connected to the power management circuit 195 to provide power to the power management circuit 195. The input voltage circuit 140 is used to filter, prevent reverse connection and surge protection for the product power input. The input end of the input detection circuit 130 receives the product power input input by the main controller 200, and the output end thereof is connected to the microcontroller 190. The input detection circuit 130 is used to detect the product power input so that the microcontroller 190 performs functional protection. For example, when the voltage of the product power input is too low, the light is turned off.

[0030] The first CAN conversion circuit 170 outputs a first control signal to the outside (such as the first CAN transceiver circuit 410), and receives a first feedback signal input from the outside (such as the first CAN transceiver circuit 410). The second CAN conversion circuit 180 outputs a second control signal to the outside (such as the second CAN transceiver circuit 310), and receives a second feedback signal input from the outside (such as the second CAN transceiver circuit 310).

[0031] In one embodiment, the microcontroller 190 selects a predetermined light mode according to the PWM input signal, and according to the predetermined light mode, sends a first control signal corresponding to the predetermined light mode through the first CAN conversion circuit 170 and / or sends a second control signal corresponding to the predetermined light mode through the second CAN conversion circuit 180. For example, if the predetermined light mode is a grille light mode, the second control signal corresponding to the grille light mode may be sent out through the second CAN conversion circuit 180.

[0032] In one embodiment, when the predetermined lighting mode is the DRL mode, the PO mode, or the PL mode, a first control signal based on the received turn signal channel voltage is sent outwardly through the first CAN conversion circuit 170, so that the DRL / PO light board achieves a predetermined lighting effect, that is, changes with the change of the turn signal channel voltage.

[0033] In one embodiment, the predetermined light mode is an animation mode, then the microcontroller 190 sends a first control signal related to the animation mode through the first CAN conversion circuit 170, and / or sends a second control signal related to the animation mode through the second CAN conversion circuit 180, so that the second LED light board 300 and the DRL / PO light board cooperate to play the animation through the light. Of course, in some embodiments, the animation can also be played by controlling the second LED light board 300 or the DRL / PO light board separately. This beautifies the lighting effect of the front of the vehicle and improves the customer experience.

[0034] In addition, the vehicle light controller 100 of the present invention is used as a supplement to the original mass-produced main controller, reducing the risk of changing the mass-produced main controller. At the same time, the current vehicle light controller has a simple structure, and the development and verification are relatively simple and fast, which has good economic benefits.

[0035] The microcontroller 190 detects the first LED lamp channel 430 by receiving the first feedback signal input by the first CAN transceiver circuit 410. When the accumulated error of a first LED lamp channel reaches a threshold, a dummy load control signal is output through the high-side switch 150 to open the corresponding dummy load circuit, thereby informing the main controller 200 that the first LED lamp channel 430 is faulty. The main controller 200 can close the corresponding first LED lamp channel, that is, not provide a constant current to the corresponding first LED lamp channel 430.

[0036] The first CAN conversion circuit 170 , the second CAN conversion circuit 180 , the first CAN transceiver circuit 410 , and the second CAN transceiver circuit 310 all include two lines, namely a transmission line and a reception line.

[0037] Figure 3 for Figure 2 A circuit diagram of a partial circuit of a vehicle light controller in FIG. 1 shows specific circuits of an input voltage circuit 140, a high-side switch 150, a constant voltage source output circuit 160, a first CAN conversion circuit 170, an input detection circuit 130, and a power management circuit 195. Figure 4 for Figure 2 1 is a circuit diagram of another part of the circuit of the vehicle light controller, which shows the specific circuits of the second CAN conversion circuit 180, the PWM capture circuit 110, and the analog-to-digital acquisition circuit 120. Figure 5 for Figure 2 1 is a circuit diagram of the microcontroller 190 of the vehicle light controller 100.

[0038] Many modifications and other implementations of the utility model involve technicians in the field, who have relevant industry knowledge and some original data. Therefore, it should be understood that the utility model is not limited to the specific embodiments disclosed, but also includes other embodiments modified within the scope of the attached claims. In addition, although the foregoing description and related drawings describe the implementation of specific embodiment combinations of elements and functions, within the scope of the attached claims, elements and functions that are implemented in different combinations by substitution are also included. The attached claims also include elements and function combinations that are different from the elements and functions explicitly described above. Although specific terms are used herein, they are intended to be generally descriptive only and are not used for limiting purposes.

Claims

1. A vehicle light controller, characterized in that: It includes: Microcontroller; A PWM capture circuit, whose input end receives an external PWM input signal and whose output end is connected to the microcontroller; An analog-to-digital acquisition circuit, wherein a first input terminal thereof receives a turn signal channel voltage, a second input terminal thereof receives a light board power input, and a first output terminal and a second output terminal thereof are both connected to the microcontroller; a power management circuit connected to the microcontroller; a first CAN conversion circuit connected to the power management circuit; A second CAN conversion circuit connected to the microcontroller; A constant voltage source output circuit, whose input end is connected to the power management circuit and whose output end outputs a constant voltage; A high-side switch connected to the power management circuit outputs one or more dummy load control signals.

2. The vehicle light controller according to claim 1, characterized in that: It also includes: An input voltage circuit, whose input end receives the power input of the product and whose output end is connected to the power management circuit; The input detection circuit has an input end receiving a power supply input of the product and an output end connected to the microcontroller.

3. The vehicle light controller according to claim 2, characterized in that: The input voltage circuit is used to filter, prevent reverse connection and surge protection for the product power input, and the input detection circuit is used to detect the product power input so that the microcontroller can perform functional protection.

4. The vehicle light controller according to claim 1, characterized in that: The power management circuit is connected to the microcontroller via an SPI interface and a CAN interface. The first CAN conversion circuit outputs a first control signal to the outside and receives a first feedback signal input from the outside. The second CAN conversion circuit outputs a second control signal to the outside and receives a second feedback signal input from the outside.

5. The vehicle light controller according to claim 4, characterized in that: The microcontroller selects a predetermined lighting mode according to the PWM input signal, and sends a first control signal corresponding to the predetermined lighting mode through a first CAN conversion circuit and / or sends a second control signal corresponding to the predetermined lighting mode through a second CAN conversion circuit according to the predetermined lighting mode.

6. The vehicle light controller according to claim 5, characterized in that: When the predetermined lighting mode is the DRL mode, the PO mode or the PL mode, a first control signal based on the received turn signal channel voltage is sent outwardly through the first CAN conversion circuit.

7. The vehicle light controller according to claim 4, characterized in that: According to a first feedback signal input externally, the high-side switch outputs one or more dummy load control signals to turn on a corresponding dummy load circuit.

8. A vehicle light control system, characterized in that: It includes: Main controller; one or more dummy load circuits; One or more first LED lamp channels, each first LED lamp channel corresponds to a dummy load circuit and includes a plurality of cascaded first LED lamps, and the main controller provides a constant current to the corresponding first LED lamp channel through each dummy load circuit; One or more first LED driving management chip circuits, each first LED driving management chip circuit is connected to a corresponding first LED lamp channel; The vehicle light controller according to any one of claims 1 to 7, wherein each dummy load control signal is output to a corresponding dummy load circuit, the output constant voltage is provided to each first LED drive management chip circuit, and the main controller provides the vehicle light controller with a PWM input signal, a turn signal channel voltage, and a light board power input; A first CAN transceiver circuit, connected between the first CAN conversion circuit and each first LED drive management chip circuit; A second LED light board connected to the second CAN conversion circuit.

9. The vehicle light control system according to claim 8, characterized in that: The second LED lamp board includes a second LED driving management chip circuit, a plurality of second LED lamp channels, a second CAN transceiver circuit connected between the second CAN conversion circuit and the second LED driving management chip circuit, and a step-down circuit. Each second LED lamp channel includes a cascaded second LED lamp, and a second LED driving management chip circuit is connected to each second LED lamp channel. The main controller provides the lamp board power input to the buck circuit, and the buck circuit provides a power supply voltage to the second LED drive management chip circuit according to the lamp board power input.

10. The vehicle light control system according to claim 9, characterized in that: The vehicle light controller detects the first LED light channel, and when the accumulated error of a first LED light channel reaches a threshold, outputs a corresponding dummy load control signal to turn on the corresponding dummy load circuit, The microcontroller selects a predetermined light mode according to the PWM input, and sends a first control signal corresponding to the predetermined light mode through the first CAN conversion circuit and / or sends a second control signal corresponding to the predetermined light mode through the second CAN conversion circuit according to the predetermined light mode. When the predetermined lighting mode is the DRL mode, the PO mode or the PL mode, a first control signal based on the received turn signal channel voltage is sent outwardly through the first CAN conversion circuit.

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