Vehicle lamp control device, vehicle lamp and vehicle
By designing the headlight control device, the driving modules of multiple LED light groups are connected to the same power module for power supply, and the communication module between the main controller and the driving module is used to select pulse control signals, which solves the problem of multiple headlights in the headlights The problem of the difficulty in meeting the voltage requirements when LED lamp beads are used in series has achieved the effect of reducing manufacturing costs and overheating risks.
Patent Information
- Application Number
- CN202421151593.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-24
AI Technical Summary
When multiple LED lamp beads in existing vehicle headlights are used in series, the voltage requirements are difficult to meet, resulting in the need of multiple power supply, which increases manufacturing costs and overheating risks.
Design a car light control device, through the main controller, power module and communication module, the driving modules of multiple LED light groups are connected to the same power module for power supply, and pulse is realized through the communication module between the main controller and the driving module. The control signal selection ensures that at the same time only one driver module drives the corresponding LED light group to work.
It effectively reduces the number of power modules, reduces manufacturing costs and overheating risks, and realizes the lighting effect of multiple LED light groups working simultaneously, without affecting the normal lighting effect of the headlights.
Smart Images
Figure CN222464873U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle control, and more specifically to a vehicle light control device, a vehicle light and a vehicle. Background Art
[0002] With the continuous development of vehicle manufacturing technology, most of the headlights on vehicles, such as headlights, turn signals, daytime running lights, etc., are made of LED lamp beads. Due to the large number of LED lamp beads, in order to meet the voltage requirements when multiple LED lamp beads are used in series, multiple power supplies are required. That is, each group of LED lamp beads is provided with a corresponding power supply for power supply, which not only increases the manufacturing cost, but also increases the risk of overheating of the lamps due to the high power during operation. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a headlight control device, a headlight and a vehicle, which reduce the risk of overheating of the headlight while reducing the manufacturing cost.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] According to an embodiment of the utility model, a vehicle light control device is provided, comprising: a control unit and a driving unit;
[0006] The control unit includes: a main controller, a power module and a first communication module;
[0007] The driving unit comprises: a second communication module and at least two driving modules;
[0008] The communication end of the main controller is connected to the input end of the first communication module, the output end of the first communication module is connected to the input end of the second communication module, and the output end of the second communication module is connected to the pulse control signal input end of each driving module;
[0009] The power supply end of each driving module is respectively connected to the output end of the power supply module, the address selection end of each driving module is respectively connected to the driving selection end of the main controller, and the output end of each driving module is connected to a corresponding LED lamp group.
[0010] Furthermore, the vehicle light control device further comprises: a filter module, the input end of the filter module is connected to the battery of the vehicle, and the output end of the filter module is respectively connected to the input end of the main controller and the power module.
[0011] Furthermore, the vehicle light control device further comprises: a system basis chip, and the communication end of the main controller is also connected to the system basis chip.
[0012] Furthermore, the power supply module includes: a DC-to-DC power supply, which converts the battery voltage into a voltage used by each driving module and the corresponding LED lamp group.
[0013] Furthermore, the first communication module and the second communication module both include: a CAN transceiver.
[0014] Furthermore, the address selection end of each driving module includes 5 pins, and the main controller is connected in parallel to a maximum of 16 driving modules.
[0015] Furthermore, the output end of each driving module includes 16 pins, and the corresponding LED lamp group includes 12 LED lamp beads.
[0016] A vehicle lamp provided according to an embodiment of the utility model comprises: the vehicle lamp control device as described above and at least two LED lamp groups, each LED lamp group being connected to an output end of a corresponding driving module.
[0017] Furthermore, the at least two LED light groups include: one or more of headlights, fog lights, taillights, turn signals, and daytime running lights.
[0018] A vehicle provided according to an embodiment of the utility model includes: a vehicle body and the vehicle lamp as described above arranged in the vehicle body.
[0019] It can be seen from the above technical scheme that the headlight control device provided by the utility model connects the driver modules of multiple LED lamps to the same power module for power supply, wherein the address selection end of each driver module is connected to the driver selection end of the main controller, and the driver module to be operated is selected by the main controller. At the same time, the selection of the pulse control signal is realized through the communication module between the main controller and each driver module, and the control mode of the LED light group is set. It is realized that only one driver module drives the corresponding LED light group to work at the same time. By coordinating with the selection speed set in the main controller, the lighting effect of multiple LED light groups working at the same time can be achieved, which does not affect the normal lighting effect of the headlights, and at the same time reduces the number of power modules. While effectively reducing the manufacturing cost, it reduces the risk of overheating and ensures the normal operation of the headlights. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0021] Figure 1 A structural diagram of a vehicle light control device provided by an embodiment of the utility model;
[0022] Figure 2 A structural diagram of an existing vehicle light control provided by an embodiment of the utility model;
[0023] Figure 3 Another structural diagram of the vehicle light control device provided by the embodiment of the utility model;
[0024] Figure 4 A circuit diagram of a communication module provided in an embodiment of the utility model;
[0025] Figure 5 A circuit diagram of a driving module and an LED lamp group provided in an embodiment of the utility model;
[0026] Figure 6 A circuit diagram of a driving module and another LED lamp group provided in an embodiment of the utility model. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] Because the number of LED lamp beads used is relatively large and the connection method is in series. The original single-channel power supply method of halogen lamps can no longer meet the voltage requirements of a large number of LED lamp beads connected in series, so multi-channel power supply is required. Figure 2 The figure shows the currently used multi-channel power supply method. Taking the vehicle headlights that drive two LED light groups as an example, the headlight control unit needs to provide a corresponding power module, namely DC-DC (direct current to direct current power supply), for each driver chip of the headlight drive unit. When controlling the working mode of the driver chip, the main controller and CAN transceiver are used to select the pulse signal to be used, so that each driver chip can work according to the selected mode and drive the corresponding LED light group to light up. It can be seen that more power modules need to be added, which will lead to an increase in manufacturing costs. At the same time, the simultaneous operation of multiple power modules will increase the power and cause the risk of overheating of the headlights.
[0029] In view of the problems existing in the above-mentioned prior art, Figure 1 As shown, an embodiment of the utility model provides a vehicle light control device, which may include: a control unit and a driving unit.
[0030] The control unit includes: a main controller, a power module and a first communication module.
[0031] The driving unit includes: a second communication module and at least two driving modules.
[0032] The communication end of the main controller is connected to the input end of the first communication module, the output end of the first communication module is connected to the input end of the second communication module, and the output end of the second communication module is connected to the pulse control signal input end of each driving module.
[0033] The power supply end of each driving module is respectively connected to the output end of the power supply module, the address selection end of each driving module is respectively connected to the driving selection end of the main controller, and the output end of each driving module is connected to a corresponding LED lamp group.
[0034] Specifically, the first communication module and the second communication module can both be Figure 2 The CAN transceiver shown in the figure realizes the communication between the main controller and each driver module (i.e., LED driver chip) through two CAN transceivers. The pulse control signal between the main controller and the LED driver chip is transmitted through the CAN transceiver, so that the LED driver chip outputs the corresponding pulse voltage to control the LED light group according to the pulse control signal of the main controller.
[0035] Each driver module is powered by the same power module (DC-DC, DC to DC power supply), and the address selection end of each driver module is connected to the driver selection end of the main controller respectively. In the specific implementation, different methods can be selected to connect to the address selection end of the driver module according to the number of driver selection ports that the main controller can provide.
[0036] For example, when the main controller can provide more drive selection ports, a corresponding drive selection terminal can be allocated to each drive module for connection. When the main controller can provide fewer drive selection ports, the address selection terminals of each drive module can be connected to the same drive selection port for parallel control.
[0037] When the LED light group needs to be lit, the main controller can send a selection signal for the drive module that needs to work through the drive selection port, and send a corresponding pulse control signal through the CAN transceiver. In this way, only one drive module drives the corresponding LED light group to work at the same time. By simply increasing the selection switching frequency between two or more drive modules, according to the principle of human eye visual retention, the lighting effect of multiple power modules working at the same time can be achieved. The effect of time-sharing multiplexing of each drive module is achieved, which effectively reduces the power consumption while reducing the manufacturing cost of the car light control device, thereby reducing the occurrence of overheating of the car light.
[0038] When the address selection end of each driver module is connected to the same driver selection port of the main controller, in order to improve the switching efficiency of each driver module and to avoid changes to the main controller and LED driver chip program, a decoder or other device with binary value conversion function can be set between the main controller and each driver module, so that the main controller only needs to output the corresponding driver module number to switch the driver module. For example, if the codes of the two driver modules are 1 and 2 respectively, when the decoder is used for control, when the main controller outputs 1, the two output pins of the decoder output 0 and 1 respectively, thereby switching the driver module with the code 1. When the main controller outputs 2, the two output pins of the decoder output 1 and 0 respectively, thereby switching the driver module with the code 2.
[0039] It is understandable that those skilled in the art can set the selection control mode between the main controller and each driving module according to the needs of actual application, and no limitation is made here.
[0040] Reference Figure 3 As shown, in order to further ensure the stability and safety of the operation of the vehicle light, in some specific embodiments of the utility model, the vehicle light control device further includes: a filter module, the input end of the filter module is connected to the battery of the vehicle, and the output end of the filter module is respectively connected to the input end of the main controller and the power module. And the communication end of the main controller is also connected to the system basic chip.
[0041] Specifically, the filter module set in the control unit can filter the KL30 power supply (normal voltage) connected from the vehicle battery, which is generally 11V to 15V, to prevent surges and other effects on the main controller and the power module. The power module uses a DC to DC power supply to convert the battery voltage into a voltage for each drive module and the corresponding LED light group. The filter module can use a filter circuit commonly used in the art for filtering, which will not be repeated here.
[0042] The system basis chip (SBC) is an integrated component that combines the scene functions required by the electronic control unit in the car, such as communication reception and transmission, power diagnosis and monitoring functions, switch wake-up functions, etc. It realizes the CAN communication and power management of the main controller, that is, the electronic control unit of the car light.
[0043] As a feasible implementation method of the above embodiment, refer to Figure 4 The circuit diagram of the CAN transceiver on the drive unit side is shown in the figure. The 12th and 13th pins of the CAN transceiver chip correspond to the transmission and reception of one CAN signal, namely CANH and CANL. The corresponding 1st and 4th pins output the corresponding pulse control signals and connect them to Figure 5 and Figure 6 Pins 5 and 6 of each LED driver chip shown are used to control the PWM pulse signal.
[0044] Take the two LED driver chips used in vehicle headlights as an example. Figure 5 and Figure 6 As shown, the 16 pins at the output end of each LED driver chip can drive the on and off control of the 12 LED lamp beads of a corresponding LED lamp group. The 24 LED lamp beads are connected in series to realize the switching control of each LED lamp group.
[0045] The LED driver chip has 5 pins 19 to 23, namely A0 to A4, which can support a maximum of 16 LED driver chips in parallel. The switching of each LED driver chip is controlled.
[0046] It is understandable that those skilled in the art may adopt other well-known LED driver chips, which is not limited here.
[0047] An embodiment of the utility model further provides a vehicle lamp, comprising: the vehicle lamp control device as described in the above embodiment and at least two LED lamp groups, each LED lamp group being connected to an output end of a corresponding driving module.
[0048] At least two of the LED light groups may include: one or more of: headlights, fog lights, taillights, turn signals, and daytime running lights, so as to realize the control of the LED light groups at at least two positions on the vehicle.
[0049] An embodiment of the utility model further provides a vehicle, comprising: a vehicle body and a vehicle lamp as described in the above embodiment arranged in the vehicle body.
[0050] The electronic control unit of the headlights, i.e. the main controller, can be connected to the on-board computer on the vehicle body to control the headlights at various positions on the vehicle individually or in conjunction with each other.
[0051] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other. The modules and submodules in the devices and terminals of each embodiment of the utility model can be merged, divided and deleted according to actual needs, and the features recorded in each embodiment can be replaced or combined.
[0052] In the several embodiments provided by the present utility model, it should be understood that the disclosed terminals and devices can be implemented in other ways. For example, the division of modules or submodules is only a logical function division, and there may be other division methods in actual implementation, such as multiple submodules or modules can be combined or integrated into another module, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.
[0053] The modules or submodules described as separate components may or may not be physically separated, and the components of the modules or submodules may or may not be physical modules or submodules, that is, they may be located in one place, or they may be distributed on multiple network modules or submodules. Some or all of the modules or submodules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0054] In addition, each functional module or sub-module in each embodiment of the present invention may be integrated into one processing module, or each module or sub-module may exist physically separately, or two or more modules or sub-modules may be integrated into one module.
[0055] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the elements.
[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A vehicle light control device, characterized in that: include: Control unit and drive unit; The control unit includes: a main controller, a power module and a first communication module; The driving unit comprises: a second communication module and at least two driving modules; The communication end of the main controller is connected to the input end of the first communication module, the output end of the first communication module is connected to the input end of the second communication module, and the output end of the second communication module is connected to the pulse control signal input end of each driving module; The power supply end of each driving module is respectively connected to the output end of the power supply module, the address selection end of each driving module is respectively connected to the driving selection end of the main controller, and the output end of each driving module is connected to a corresponding LED lamp group.
2. The vehicle light control device according to claim 1, characterized in that: Also includes: A filter module, wherein the input end of the filter module is connected to the battery of the vehicle, and the output end of the filter module is respectively connected to the input end of the main controller and the input end of the power module.
3. The vehicle light control device according to claim 1, characterized in that: Also includes: System basis chip, the communication end of the main controller is also connected to the system basis chip.
4. The vehicle light control device according to claim 1, characterized in that: The power supply module includes: a DC-to-DC power supply, which converts the battery voltage into a voltage used by each driving module and the corresponding LED lamp group.
5. The vehicle light control device according to claim 1, characterized in that: The first communication module and the second communication module both include: a CAN transceiver.
6. The vehicle light control device according to claim 1, characterized in that: The address selection end of each driving module includes 5 pins, and the main controller is connected in parallel to a maximum of 16 driving modules.
7. The vehicle light control device according to claim 1, characterized in that: The output end of each driving module includes 16 pins, and the corresponding LED lamp group includes 12 LED lamp beads.
8. A vehicle lamp, characterized in that: include: The vehicle light control device as claimed in any one of claims 1 to 7 and at least two LED light groups, each LED light group is connected to the output end of a corresponding driving module.
9. The vehicle lamp according to claim 8, characterized in that: The at least two LED light groups include: one or more of headlights, fog lights, taillights, turn signals, and daytime running lights.
10. A vehicle, characterized in that: include: A vehicle body and a vehicle lamp according to claim 9 arranged in the vehicle body.