A vehicle lamp driving system with reduced static power consumption

Abstract

The utility model provides a kind of vehicle light driving system for reducing static power consumption, belong to vehicle light driving technical field, including vehicle light and the vehicle light driving module being connected to vehicle light;Vehicle data acquisition module, vehicle data acquisition module at least includes speed acquisition unit and ambient light acquisition unit;Vehicle light parameter feedback module, vehicle light parameter feedback module connects vehicle light;Main control module, the input of main control module is connected speed acquisition unit, ambient light acquisition unit and vehicle light parameter feedback module respectively, and the output of main control module is connected vehicle light driving module.There is beneficial effect: the utility model is by being arranged vehicle data acquisition module and vehicle light parameter feedback module, can obtain the driving speed of vehicle, ambient light intensity information and vehicle light state parameter in real time, and the opening and closing state and brightness of adaptive control vehicle light, to reduce static power consumption, reach the purpose of energy saving.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting drive technology, and in particular to a vehicle lighting drive system that reduces static power consumption. Background Technology

[0002] Traditional automotive lighting technology typically relies on the lighting driver module to generate corresponding lighting signals based on the driver's button presses. This approach passively responds to manual driver input and cannot adaptively adjust based on real-time vehicle data. For instance, different driving scenarios (such as high-speed driving) and environmental conditions (such as daytime, nighttime, cloudy, and rainy weather) require different levels of brightness and illumination range from the headlights. However, traditional lighting drivers cannot make timely and appropriate adjustments based on these conditions, which negatively impacts driving safety and comfort. Utility Model Content

[0003] To address the above technical problems, this utility model provides a vehicle lighting drive system that reduces static power consumption.

[0004] The technical problem solved by this utility model can be achieved by the following technical solution:

[0005] A vehicle lighting drive system with reduced static power consumption includes a vehicle lamp and a vehicle lighting drive module connected to the vehicle lamp, and further includes:

[0006] A vehicle data acquisition module, wherein the vehicle data acquisition module includes at least a vehicle speed acquisition unit and an ambient light acquisition unit;

[0007] A vehicle headlight parameter feedback module, wherein the vehicle headlight parameter feedback module is connected to the vehicle headlight;

[0008] The main control module has its input terminals connected to the vehicle speed acquisition unit, the ambient light acquisition unit, and the headlight parameter feedback module, respectively, and its output terminal connected to the headlight drive module.

[0009] Preferably, it further includes:

[0010] A power supply module is controllably connected to the vehicle speed acquisition unit and the ambient light acquisition unit;

[0011] A boost module is connected between the power supply module and the vehicle light drive module;

[0012] A voltage regulator module is connected between the power supply module and the main control module.

[0013] Preferably, the power module includes:

[0014] The main power supply circuit has its output terminals connected to the boost module and the voltage regulator module, respectively.

[0015] A first power supply circuit, wherein the input terminal of the first power supply circuit is connected to the main power supply circuit via a first switch, the output terminal of the first power supply circuit is connected to the ambient light acquisition unit, and the first switch is connected to the main control module;

[0016] The second power supply circuit has its input terminal connected to the main power supply circuit via a second switch, and its output terminal connected to the vehicle speed acquisition unit. The second switch is also connected to the main control module.

[0017] Preferably, the boost module includes an interleaved power factor corrector or an LLC resonant converter.

[0018] Preferably, the headlight parameter feedback module is used to provide feedback on headlight status parameters, which include headlight on, headlight off, headlight high brightness, or headlight low brightness.

[0019] Preferably, it further includes:

[0020] The wake-up module is connected between the main control module and the power module.

[0021] Preferably, the headlight and the headlight parameter feedback module are mounted on the headlight board, and the headlight drive module, the main control module and the power supply module are mounted on the controller circuit board.

[0022] Preferably, the main control module is connected to the vehicle data acquisition module via a CAN bus or an in-vehicle Ethernet.

[0023] Preferably, the vehicle lights are high beam headlights, low beam headlights, turn signals, daytime running lights, or position lights.

[0024] Preferably, the vehicle light is an LED light.

[0025] The advantages or beneficial effects of this utility model's technical solution are as follows:

[0026] This invention, by setting up a vehicle data acquisition module and a headlight parameter feedback module, can acquire vehicle speed, ambient light intensity information and headlight status parameters in real time, and adaptively control the on / off state and brightness of the headlights, thereby reducing static power consumption and achieving energy saving. Attached Figure Description

[0027] Figure 1 This is a structural block diagram of a vehicle lighting drive system for reducing static power consumption, as described in a preferred embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0031] See Figure 1 In a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, a vehicle lighting drive system with reduced static power consumption is provided, including a vehicle lamp 4 and a vehicle lighting drive module 3 connected to the vehicle lamp 4, and further including:

[0032] The vehicle data acquisition module 7 includes at least a vehicle speed acquisition unit 71 and an ambient light acquisition unit 72.

[0033] Headlight parameter feedback module 8, headlight parameter feedback module 8 is connected to headlight 4;

[0034] The main control module 6 has its input terminals connected to the vehicle speed acquisition unit 71, the ambient light acquisition unit 72, and the headlight parameter feedback module 8, respectively, and its output terminal connected to the headlight drive module 3.

[0035] Specifically, the vehicle lighting drive system for reducing static power consumption in this embodiment of the present invention mainly consists of a vehicle light 4, a vehicle lighting drive module 5, a vehicle data acquisition module 7, a vehicle lighting parameter feedback module 8, and a main control module 6.

[0036] The vehicle data acquisition module 7 includes a vehicle speed acquisition unit 71 and an ambient light acquisition unit 72. The vehicle speed acquisition unit 71 can employ a Hall sensor, which is installed near the vehicle's transmission system. It acquires vehicle speed information by sensing changes in the rotating magnetic field of the transmission components. When the vehicle is moving, the transmission components rotate, and the Hall sensor generates a corresponding electrical signal. This signal is processed and converted before the vehicle speed data is transmitted to the main control module 6.

[0037] The ambient light acquisition unit 72 can be a photoresistor to acquire ambient light. Photoresistors are typically installed on the exterior of a vehicle, such as at the front, and can sense changes in the intensity of ambient light outside the vehicle. The stronger the ambient light, the lower the resistance of the photoresistor; the dimmer the ambient light, the higher the resistance. By measuring the change in the resistance of the photoresistor and converting it into an electrical signal, ambient light intensity information is obtained and transmitted to the main control module.

[0038] The headlight parameter feedback module 8 is connected to the headlight 4 and is used to monitor and provide feedback on the headlight's status parameters in real time, such as current, voltage, and brightness. This module uses current and voltage sensors to measure the actual current and voltage of the headlight, respectively, and a brightness sensor to detect the actual brightness of the headlight. These collected parameters are then fed back to the main control module.

[0039] The main control module 6 can use a high-performance microcontroller (MCU), such as an ARM series microcontroller, which can adjust the LED headlight driving parameters according to the actual vehicle speed, ambient light intensity information, and headlight status parameters, and adaptively control the headlight's on / off state and brightness, thereby reducing static power consumption and achieving energy saving.

[0040] For example, when the vehicle is traveling at high speed and the ambient light is dim, the main control module 6 will automatically increase the drive current of the headlights to increase LED brightness and ensure lighting performance. As another example, when the vehicle is parked and the headlights are not turned off, the main control module 6 will switch the system to deep sleep mode to reduce system power consumption. In deep sleep mode, it maintains extremely low power consumption to monitor for wake-up signals. When the vehicle restarts, the main control module 6 will exit deep sleep mode and resume normal system operation.

[0041] In a preferred embodiment, it further includes:

[0042] The power supply module 1 is controllably connected to the vehicle speed acquisition unit 71 and the ambient light acquisition unit 72;

[0043] The boost module 2 is connected between the power module 1 and the headlight drive module 3;

[0044] The voltage regulator module 5 is connected between the power supply module 1 and the main control module 6.

[0045] Specifically, the system power supply consists of a power module 1, a boost module 2, a headlight driver module 3, a voltage regulator module 5, and a main control module 6. The boost module 2 increases the BAT voltage output from the power module 1 to a voltage suitable for the headlight driver module 3. The voltage regulator module 5, which can be a low-dropout regulator (LDO), regulates the BAT voltage output from the power module 1, eliminating voltage fluctuations and interference, and providing a stable operating voltage for the main control module 6 to ensure its normal operation.

[0046] Meanwhile, the power module 1 can control the power supply to the two acquisition units, vehicle speed acquisition unit 71 and ambient light acquisition unit 72. During data acquisition, the power supply to the two acquisition units is turned on, and during the non-acquisition phase after data acquisition is completed, the power supply to the two acquisition units is turned off, so as to reduce unnecessary power consumption for data acquisition.

[0047] More specifically, by adding sensors and utilizing the data collected by these sensors to achieve adaptive adjustment of the headlight drive module, the intelligence level of the headlight drive can be improved. However, the added sensors and their associated peripheral circuits will increase the overall power consumption of the drive system. In the context of the automotive industry's increasing emphasis on energy conservation and emission reduction, this increase in power consumption not only fails to meet environmental protection requirements but may also adversely affect the vehicle's range and other performance characteristics. Therefore, in this embodiment, in addition to selecting low-power electronic components for each part of the system as much as possible, the power supply section can be further optimized. By adopting a controllable power supply method, on-demand power can be supplied to the vehicle speed acquisition unit 71 and the ambient light acquisition unit 72 to reduce power consumption. As a preferred embodiment, the power module 1 includes:

[0048] The main power supply circuit 11 has its output terminals connected to the boost module and the voltage regulator module, respectively. The main power supply circuit 11 can use a car battery to output the BAT voltage to the boost module and the voltage regulator module.

[0049] The first power supply circuit 14 has its input terminal connected to the main power supply circuit 11 via the first switch 12, and its output terminal connected to the ambient light acquisition unit 72. The first switch 12 is connected to the main control module 6, which is used to convert the BAT voltage into a voltage suitable for the operation of the ambient light acquisition unit 72, thereby powering the ambient light acquisition unit 72.

[0050] The second power supply circuit 15 has its input terminal connected to the main power supply circuit 11 via the second switch 13. The output terminal of the second power supply circuit 14 is connected to the vehicle speed acquisition unit 71. The second switch 13 is connected to the main control module 6, which is used to convert the BAT voltage into a voltage suitable for the operation of the vehicle speed acquisition unit 71, thereby powering the vehicle speed acquisition unit 71.

[0051] In this embodiment, the main control module 6 can control the opening and closing of the first switch 12, thereby realizing the power supply control of the ambient light acquisition unit 72. When the main control module 6 controls the first switch 12 to close, the first power supply circuit 14 supplies power to the ambient light acquisition unit 72; when the main control module 6 controls the first switch 12 to open, the first power supply circuit 14 stops supplying power to the ambient light acquisition unit 72, so as to reduce system power consumption.

[0052] Similarly, the main control module 6 can control the opening and closing of the second switch 13, thereby realizing the power supply control of the vehicle speed acquisition unit 71. When the main control module 6 controls the second switch 13 to close, the second power supply circuit 15 supplies power to the vehicle speed acquisition unit 71; when the main control module 6 controls the second switch 13 to open, the second power supply circuit 15 stops supplying power to the vehicle speed acquisition unit 71, so as to reduce system power consumption.

[0053] In a preferred embodiment, the boost module 2 includes an interleaved power factor correction (PFC) unit or an LLC resonant converter.

[0054] Specifically, in this embodiment, interleaved PFC and LLC resonant converter topologies are used. Interleaved PFC operates through multiple PFC circuits working in an interleaved manner. In the front stage, the power factor of the input power supply is corrected to improve the input power factor and reduce the input current ripple. In the rear stage, the LLC resonant converter performs voltage transformation to improve power conversion efficiency and reduce static power consumption.

[0055] Interleaved PFC circuits typically include multiple power switches, such as MOSFETs. These power switches are turned on and off in a specific timing sequence. For example, a two-phase interleaved PFC circuit includes two MOSFETs, two inductors, two diodes, and two output capacitors. The drains of the two MOSFETs are connected to the positive terminal of the BAT voltage, and their sources are connected to the negative terminal of the BAT voltage through inductors. A diode is connected to the output terminal of each inductor; the anode of the diode is connected to the inductor, and the cathode of the diode is connected to the positive terminal of the output capacitor. The negative terminal of the output capacitor is connected to the negative terminal of the BAT voltage, and the output of the output capacitor serves as the output terminal of the two-phase interleaved PFC circuit.

[0056] In a two-phase interleaved PFC, two MOSFETs are turned on alternately, with their on-times differing by half a switching cycle, causing the input current ripple to cancel each other out, thereby reducing the input current ripple.

[0057] An LLC resonant converter is a DC-DC converter based on the principle of resonance. It utilizes the resonant characteristics of inductors and capacitors to achieve soft-switching technology, reducing switching losses and improving power conversion efficiency. An LLC resonant converter typically consists of a resonant network, power switching transistors, a transformer, a rectifier circuit, and an output capacitor. The transformer is used for voltage transformation and electrical isolation. The primary side connects to the resonant network and power switching transistors, while the secondary side connects to the rectifier circuit.

[0058] A resonant network typically consists of a resonant inductor, a magnetizing inductor, and a resonant capacitor. The resonant inductor and magnetizing inductor are integrated on the primary side of the transformer, and the resonant capacitor is connected between one end of the primary side of the transformer and the drain of the power switching transistor. The power switching transistor can be a MOSFET. For example, the drains of two MOSFETs are connected to the positive terminal of the BAT voltage and one end of the primary side of the transformer, respectively, and the sources are connected to the negative terminal of the BAT voltage.

[0059] The rectifier circuit uses diodes to form a full-wave rectifier circuit, which converts the AC voltage on the secondary side of the transformer into DC voltage; the output capacitor is connected to the output terminal of the rectifier circuit to smooth the output voltage.

[0060] In a preferred embodiment, the headlight parameter feedback module 8 is used to provide feedback on headlight status parameters, including headlight on, headlight off, headlight high brightness, or headlight low brightness.

[0061] Specifically, in this embodiment, the actual current, voltage, and brightness of the headlights are monitored to determine the headlight status parameters, such as whether the headlights are on or at high or low brightness.

[0062] In a preferred embodiment, it further includes:

[0063] The wake-up module (not shown in the figure) is connected between the main control module 6 and the power supply module 1.

[0064] Specifically, in this embodiment, the wake-up module is used to monitor the wake-up signal in deep sleep mode in order to wake up the main control module 6.

[0065] In a preferred embodiment, the headlight 4 and the headlight parameter feedback module 8 are mounted on the headlight panel, while the headlight drive module 3, the main control module 6, and the power supply module 1 are mounted on the controller circuit board.

[0066] Specifically, in this embodiment, the drive system modules are partitioned by the lamp board and the controller circuit board. The vehicle lamp 4 and the vehicle lamp parameter feedback module 8 are placed close to each other on the lamp board, shortening the signal transmission path and reducing signal loss and interference during transmission, thereby making the feedback vehicle lamp status parameters more accurate and timely. The vehicle lamp drive module 3, the main control module 6, and the power supply module 1 are centralized on the controller circuit board, realizing centralized control and coordinated management of the modules, improving the response speed and control accuracy of the entire system.

[0067] In a preferred embodiment, the main control module 6 is connected to the vehicle data acquisition module 7 via a CAN (Controller Area Network) bus or an in-vehicle Ethernet.

[0068] Specifically, in this embodiment, the CAN (Controller Area Network) bus is a serial communication protocol bus widely used in real-time applications of automotive electronic systems. It uses twisted-pair cables to transmit signals and has advantages such as high reliability, strong real-time performance, and good anti-interference ability.

[0069] In-vehicle Ethernet is a local area network used to connect various electronic units within a vehicle, offering advantages such as high-speed communication and fast transmission rates.

[0070] In a preferred embodiment, the vehicle light 4 is a high beam headlight, a turn signal, a daytime running light, or a position light.

[0071] More specifically, when multiple vehicle lights are integrated, each type of vehicle light corresponds to a vehicle light driver module 3, and the main control module 6 controls the corresponding vehicle light driver module 3 to drive the corresponding vehicle light 4.

[0072] In a preferred embodiment, the vehicle light 4 is an LED light.

[0073] Specifically, in this embodiment, the vehicle headlight 4 can be a high or low beam headlight, turn signal, daytime running light, or position light to meet the vehicle's lighting needs under different driving scenarios and operating conditions. Furthermore, LED lights are preferably used, as they have significant advantages such as low energy consumption, long lifespan, fast response speed, high luminous efficiency, and rich colors, providing stable and high-quality lighting for the vehicle.

[0074] Furthermore, the vehicle light 4 can also serve as an emergency light. Considering that the emergency light needs to maintain power supply when the vehicle enters deep sleep mode due to an abnormality, a low-power DC / DC circuit and a diode are set up. The input terminal of the DC / DC circuit is connected to the BAT voltage, the output terminal of the DC / DC circuit is connected to the anode of the diode, and the cathode of the diode is connected to the emergency light, thereby enabling power supply to the emergency light in deep sleep mode.

[0075] The advantages or beneficial effects of adopting the above technical solution are as follows: By setting a vehicle data acquisition module and a headlight parameter feedback module, this utility model can acquire vehicle speed, ambient light intensity information and headlight status parameters in real time, and adaptively control the on / off state and brightness of the headlights, thereby reducing static power consumption and achieving the purpose of energy saving.

[0076] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made using the content of this specification and illustrations should be included within the protection scope of the present utility model.

Claims

1. A vehicle lighting drive system with reduced static power consumption, comprising a vehicle lamp and a vehicle lighting drive module connected to the vehicle lamp, characterized in that, Also includes: A vehicle data acquisition module, wherein the vehicle data acquisition module includes at least a vehicle speed acquisition unit and an ambient light acquisition unit; A vehicle headlight parameter feedback module, wherein the vehicle headlight parameter feedback module is connected to the vehicle headlight; The main control module has its input terminals connected to the vehicle speed acquisition unit, the ambient light acquisition unit, and the headlight parameter feedback module, respectively, and its output terminal connected to the headlight drive module.

2. The vehicle lighting drive system for reducing static power consumption according to claim 1, characterized in that, Also includes: A power supply module is controllably connected to the vehicle speed acquisition unit and the ambient light acquisition unit; A boost module is connected between the power supply module and the vehicle light drive module; A voltage regulator module is connected between the power supply module and the main control module.

3. The vehicle lighting drive system for reducing static power consumption according to claim 2, characterized in that, The power module includes: The main power supply circuit has its output terminals connected to the boost module and the voltage regulator module, respectively. A first power supply circuit, wherein the input terminal of the first power supply circuit is connected to the main power supply circuit via a first switch, the output terminal of the first power supply circuit is connected to the ambient light acquisition unit, and the first switch is connected to the main control module; The second power supply circuit has its input terminal connected to the main power supply circuit via a second switch, and its output terminal connected to the vehicle speed acquisition unit. The second switch is also connected to the main control module.

4. The vehicle lighting drive system for reducing static power consumption according to claim 2, characterized in that, The boost module includes an interleaved power factor corrector and an LLC resonant converter.

5. The vehicle lighting drive system for reducing static power consumption according to claim 1, characterized in that, The headlight parameter feedback module is used to provide feedback on headlight status parameters, including headlight on, headlight off, headlight high brightness, or headlight low brightness.

6. The vehicle lighting drive system for reducing static power consumption according to claim 2, characterized in that, Also includes: The wake-up module is connected between the main control module and the power module.

7. The vehicle lighting drive system for reducing static power consumption according to claim 2, characterized in that, The headlight and the headlight parameter feedback module are mounted on the headlight board, while the headlight drive module, the main control module, and the power supply module are mounted on the controller circuit board.

8. The vehicle lighting drive system for reducing static power consumption according to claim 1, characterized in that, The main control module is connected to the vehicle data acquisition module via a CAN bus or an in-vehicle Ethernet.

9. The vehicle lighting drive system for reducing static power consumption according to claim 1, characterized in that, The vehicle lights are high and low beam headlights, turn signals, daytime running lights, or position lights.

10. The vehicle lighting drive system for reducing static power consumption according to claim 1, characterized in that, The vehicle lights are LED lights.

Images