A platform front headlamp driving system and driving method

Abstract

The application provides a platformized headlamp driving system and a driving method, and belongs to the technical field of automobile lighting. The driving system comprises at least one platformized driving control device and an LED load connected with the platformized driving control device. The platformized driving control device comprises an anti-reverse connection module for protecting the constant-current constant-voltage driving module; an MCU control module is used for automatically adjusting the current value and / or voltage value output by the constant-current constant-voltage driving module through PWM dimming based on the voltage value of the BIN resistor obtained through the RBIN pin; the constant-current constant-voltage driving module is externally connected with the LED load, and is used for driving the LED load to work based on the output current value and / or voltage value; an LDO module is used for providing working voltage for the MCU control module; the MCU control module is used for controlling the working state of the switching module through PWM; and a communication module is used for driving configuration and / or driving upgrade of the MCU control module. The development cost and development cycle of the driving system are reduced, and the universality of the driving system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile lighting, and in particular to a platform-based headlamp driving system and driving method. Background Art

[0002] With the advancement of automotive lighting technology, headlights have evolved from traditional halogen headlights to intelligent and networked smart LED headlights. These headlights offer a growing range of functions. However, the functional requirements for headlights vary significantly across vehicle segments. Low-end models primarily require high and low beams, signal lights (daytime running lights, position lights, and turn signals), and adjustable headlight height. Mid-range models add dynamic turn signal flow or unlocking welcome effects, while high-end models build on these low-end models with advanced lighting features such as ADB, AFS, and DLP, as well as music-based light shows. Once an OEM assigns a project to a lighting manufacturer, it may encompass multiple driver configurations. The lighting manufacturer develops customized lighting drivers for each configuration. Customized drivers require a thorough understanding of the customer's needs and are broken down into individual modules. First, a thorough understanding of the system's requirements, external interfaces, system boundaries, and the loads and devices that need to be driven is crucial. Second, the functional modules must be identified, with careful consideration given to ensuring each module's circuitry meets the customer's requirements in terms of hardware, software, and functional safety. During project development, circuit modules undergo module testing, system testing, and diagnostic testing using simulated faults, continuously fixing driver software and hardware bugs until they reach a deliverable state. Because these drivers are custom-developed, this high level of customization incurs significant development costs and a long development cycle, far from meeting the needs of rapidly evolving vehicle models.

[0003] In other words, after development, non-platform headlight drivers can only be adapted to a single vehicle type and lack excellent versatility. Some hardware modules can be ported to other models, but variations in lighting distribution across these models result in different LED load power, making direct software portability impossible. Some hardware can be ported to another vehicle type, but due to functional differences, some hardware modules may be unnecessary or missing. This can lead to wasted PCB space, excessive hardware reserve or unsupported modules, oversized heat sinks, and mismatched structural dimensions. Therefore, for each new headlight driver design, all structural component molds must be re-molded, the hardware redesigned, the software redesigned, and a set of matching testing and production process methods must be developed. These design and development costs must be spread across the products sold, increasing product prices and wasting resources due to excessive human resources.

[0004] The above problems are in urgent need of resolution. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problems of high development cost and low versatility of headlamp drivers in the prior art, and to provide a platform-based headlamp driving system and driving method.

[0006] On the one hand, an embodiment of the present invention provides a platform-based headlamp drive system, wherein the drive system includes at least one platform-based drive control device and an LED load connected to the platform-based drive control device, wherein the platform-based drive control device includes: an anti-reverse connection module, an LDO module, an MCU control module, a constant current and constant voltage drive module, a switch module and a communication module; the anti-reverse connection module is electrically connected to the first input end of the constant current and constant voltage drive module for protecting the constant current and constant voltage drive module; the first input end of the MCU control module is connected to the RBIN pin, and the first output end is connected to the second input end of the constant current and constant voltage drive module for dividing the BIN resistance based on the resistance obtained through the RBIN pin. The voltage value of the constant current and constant voltage drive module is automatically adjusted through PWM dimming; the constant current and constant voltage drive module is externally connected to an LED load, and is used to drive the LED load to work based on the output current value and / or voltage value; the output end of the LDO module is electrically connected to the second input end of the MCU control module, and is used to provide an operating voltage for the MCU control module; the second output end of the MCU control module is electrically connected to the input end of the switch module, and is used to control the working state of the switch module through PWM; the communication module is electrically connected to the MCU control module, and is used to perform drive configuration and / or drive upgrade on the MCU control module through the communication module.

[0007] Furthermore, the MCU control module is also used to: obtain the voltage value of the BIN resistor obtained through the RBIN pin based on the configuration information pre-configured in the driver to obtain the corresponding current value and / or voltage value; and automatically adjust the current value or voltage value output by the constant current and constant voltage drive module through PWM dimming based on the current value and / or voltage value.

[0008] Furthermore, the configuration information includes a current configuration word relationship list and a function multiplexing configuration word relationship list, the current configuration word relationship list includes the correspondence between the voltage value of the BIN resistor and the current value output by the constant current and constant voltage driving module, and the function multiplexing configuration word relationship list includes the correspondence between the configuration word, the configuration word value and the function.

[0009] Furthermore, the first input end of the MCU control module is also connected to the NTC pin, and the MCU control module is also used to control the current value and / or voltage value output by the constant current and constant voltage drive module based on the thermistor resistance on the LED load input by the NTC pin, including: when the thermistor resistance is greater than a preset resistance threshold, the MCU control module controls the reduction of the current value output by the constant current and constant voltage drive module.

[0010] Furthermore, the constant current and constant voltage driving module includes at least one constant current driving module and / or at least one constant voltage driving module, the constant current driving module includes multiple CC channels for driving the LED load to achieve static functions, and the constant voltage driving module includes multiple CV channels for driving the LED load to achieve dynamic functions.

[0011] Furthermore, the switch module includes at least one high-side switch module and / or at least one low-side switch module, the low-side switch module is grounded, the high-side switch module includes N high-side switches, and the high-side switches are externally connected to a driving device.

[0012] Furthermore, the platform-based drive control device also includes a digital-to-analog converter, one end of the digital-to-analog converter is electrically connected to the MCU control module, and the other end is electrically connected to the drive device, one end of the high-side switch module is electrically connected to the MCU control module, and the other end is electrically connected to the drive device, the digital-to-analog converter and the high-side switch module are used to jointly control the working state of the drive device based on the control instructions sent by the MCU control module.

[0013] Furthermore, the platform-based drive control device also includes a motor driver, one end of which is electrically connected to the MCU control module, and the other end is externally connected to a stepper motor, for controlling the working state of the stepper motor based on the control instructions sent by the MCU control module.

[0014] Furthermore, the communication module includes a CAN transceiver module and a LIN interface module, one end of the LIN interface module is used to receive LIN signals, and the other end is connected to the MCU control module. The LIN interface module is used to drive configuration and drive upgrades, one end of the CAN transceiver module is connected to the MCU control module, and the other end is connected to an external LED load for controlling the LED load.

[0015] In the second aspect, an embodiment of the present invention provides a platform headlight driving method, which is applied to the above-mentioned platform headlight driving system, and the method includes: obtaining the voltage value of the BIN resistor through the RBIN pin; calling the corresponding current value and / or voltage value based on the configuration information pre-configured in the driver; automatically adjusting the current value and / or voltage value output by the constant current and constant voltage driving module through PWM dimming based on the current value or voltage value; and driving the LED load to work based on the output current value and / or voltage value.

[0016] On the other hand, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores one or more instructions, and the computer instructions are used to enable the computer to execute the above-mentioned platform-based headlamp driving method.

[0017] On the other hand, the present invention provides an electronic device comprising: a memory and a processor; the memory stores at least one program instruction; the processor implements the above-mentioned platform-based headlight driving method by loading and executing the at least one program instruction.

[0018] The beneficial effects of the present invention are:

[0019] (1) By integrating various functional modules into a platform-based drive control device, its hardware design becomes modular. The platform-based drive can be used on multiple vehicle models, avoiding repeated development of drives, thereby reducing drive development costs and improving the versatility of the drive control device.

[0020] (2) By configuring the configuration word in the driver, the software design is made portable, so there is no need to redevelop the software for different drivers when facing different drivers.

[0021] (3) By solidifying the configuration word in the driver, the platform headlight drive system can be adapted to various load conditions, and the functions of a certain module can be reused, thereby making the platform drive more scalable.

[0022] (4) Platform-based driving has achieved unification in testing, production processes, connector and structural heat dissipation, etc., realizing automated production and achieving the goal of reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and examples.

[0024] Figure 1 This is a schematic structural diagram of a platform headlight drive system provided in Example 1 of the present invention.

[0025] Figure 2This is a structural diagram of the first platform-based drive control device provided in Example 1 of the present invention.

[0026] Figure 3 This is a structural diagram of the second platform-based drive control device provided in Example 1 of the present invention.

[0027] Figure 4 This is a structural diagram of the third platform-based drive control device provided in Example 1 of the present invention.

[0028] Figure 5 This is a structural diagram of the fourth platform-based drive control device provided in Example 1 of the present invention.

[0029] Figure 6 This is a flow chart of a platform headlight driving method provided in Example 2 of the present invention.

[0030] Figure 7 This is a partial block diagram of an electronic device provided in Example 4 of the present invention. DETAILED DESCRIPTION

[0031] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the various operations as sequential processes, many of the operations therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0032] It should be understood that although the terms "first," "second," and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used solely to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the exemplary embodiments. The term "and / or" as used herein includes any and all combinations of one or more of the listed associated items.

[0033] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0034] To facilitate subsequent understanding, the following professional terms are explained here:

[0035] ADB: (adaptive driving beam, ADB), adaptive headlights;

[0036] DLP: (digital light processing, DLP), digital lighting;

[0037] AFS: (adaptive front-light system, AFS), adaptive front lighting system;

[0038] ALS: (automatic leveling system, ALS), automatic leveling system;

[0039] DBL: (dynamic bending light, DBL), dynamic turning light;

[0040] LDO: (low dropout regulator, LDO), low voltage difference linear regulator;

[0041] DAC: digital-to-analog converter;

[0042] PWM: (pulse width modulation, PWM), pulse width modulation.

[0043] Example 1

[0044] To facilitate understanding, before describing the embodiments of the present invention in detail, a general overview of the inventive concept is provided. When designing a platform-based headlight driver, several configurations are first planned based on actual applications. These configurations must encompass the full range of headlight driver applications. Because headlight manufacturers custom-develop headlight drivers for different vehicle models, all platform-based driver configurations are generally evaluated based on the OEM's needs and in-house driver experience. The basic principle of platform-based driver classification is based on the communication method between the headlight driver and the vehicle body, such as whether it utilizes a hard-wired connection, LIN communication, or CAN communication. To further illustrate the classification method, based on the configurations of most vehicles on the market, platform-based driver control devices are divided into four categories, as shown in Table 1: Configuration 1, Configuration 2, Configuration 3, and Configuration 4. The functions of the different configurations increase from the least to the most. Based on the different configurations, the platform-based driver control devices are modularly configured. The functional modules configured in different platform-based driver control devices are shown in Table 2. LED loads or functions are categorized using software configuration words. Based on the load and configuration word category, the output current of the constant current channel is adjusted by reading the configuration word value. This ensures that a platform-based drive control device can be universally used for vehicles of the same level. That is, different models of vehicles in the same level can use the platform-based drive control device to drive their LED loads, and through configuration words, when a certain function uses LED loads of different powers in different vehicle models, the constant current channel output current of the function corresponding to the platform-based drive can be universally used to drive LED loads of different powers. In addition, when corresponding to different vehicle models, the functions of the controlled lamps may be different, and the high-side or low-side functions of the drive can also be reused through configuration words.

[0045] Table 1:

[0046]

[0047] Table 2:

[0048]

[0049] The specific implementation is as follows:

[0050] like Figure 1 FIG. 1 is a schematic structural diagram of a platform headlight driving system provided by the present invention.

[0051] As an example, the drive system includes at least one platform-based drive control device 1 and an LED load 2 connected to the platform-based drive control device, and the platform-based drive control device 1 includes: an anti-reverse connection module 100, an LDO module 110, an MCU control module 120, a constant current and constant voltage drive module 130, a switch module 140 and a communication module 150; the anti-reverse connection module 100 is electrically connected to the first input end of the constant current and constant voltage drive module 130, for protecting the constant current and constant voltage drive module 130; the first input end of the MCU control module 120 is connected to the RBIN pin, and the first output end is connected to the second input end of the constant current and constant voltage drive module 130, for automatically dimming the constant current and constant voltage through PWM based on the voltage value of the BIN resistor obtained through the RBIN pin. Dynamically adjust the current value and / or voltage value output by the constant current and constant voltage drive module 130; the constant current and constant voltage drive module 130 is externally connected to an LED load 2, and is used to drive the LED load 2 to work based on the output current value and / or voltage value; the output end of the LDO module 110 is electrically connected to the second input end of the MCU control module 120, and is used to provide an operating voltage for the MCU control module 120; the second output end of the MCU control module 120 is electrically connected to the input end of the switch module 140, and is used to control the working state of the switch module 140 through PWM; the communication module 150 is electrically connected to the MCU control module 120, and is used to perform drive configuration and / or drive upgrade on the MCU control module 120 through the communication module 150.

[0052] Preferably, combined Figure 2-5 The following are schematic diagrams of the platform headlight drive system structures corresponding to configuration one, configuration two, configuration three and configuration four.

[0053] Specifically, if Figure 2As shown, the constant current and constant voltage drive module 130 in the platform drive control device 1 in configuration one includes a DCDC constant current drive module 1301, a DCDC constant current drive module 1302, a DCDC constant current drive module 1303 and a DCDC constant current drive module 1304. The DCDC constant current drive module 1301 is used to control the low beam function, the DCDC constant current drive module 1302 is used to control the high beam function, the DCDC constant current drive module 1303 is used to control the turn signal function, and the DCDC constant current drive module 1304 is used to control the daytime running light / position light function; the switch module 140 in the platform drive control device 1 in configuration one includes two low-side switches LSD1 and LSD2; the communication module 150 in the platform drive control device 1 in configuration one includes a LIN interface module 1501 for configuring the drive and the drive upgrade; the MCU control module 120 introduces three NTC pins and four RBIN pins; the LDO module 110 in the platform drive control device 1 in configuration one includes one LDO. The input power supply for different functions is separated independently, generally supplying power to the high-side switch or efuse of the upper domain controller; turning on the power supply for different functions can light up the corresponding lighting function.

[0054] like Figure 3 As shown in the figure, configuration 2 adds private CAN & UART communication based on configuration 1, so that the signal light can realize dynamic functions. Specifically, the constant current and constant voltage drive module 130 in the platform drive control device 1 in configuration two includes a DCDC constant current drive module 1301, a DCDC constant current drive module 1302, and a DCDC constant voltage drive module 1303. The DCDC constant current drive module 1301 is used to control the low beam function, the DCDC constant current drive module 1302 is used to control the high beam function, and the DCDC constant voltage drive module 1305 and the CAN transceiver module 1502 jointly control the LED load to realize the dynamic signal light function; the switch module 140 in the platform drive control device 1 in configuration two includes two low-side switches LSD1 and LSD2 and a high-side switch HSS; the communication module 150 in the platform drive control device 1 in configuration two includes a LIN interface module 1501 and a CAN transceiver module 1502, which are used to configure the drive and drive upgrade and enable the signal light to realize dynamic functions; the MCU control module 120 introduces three NTC pins and four RBIN pins; the LDO module 110 in the platform drive control device 1 in configuration two includes an LDO.

[0055] like Figure 4As shown, the constant current and constant voltage drive module 130 in the platform drive control device 1 in configuration three includes a DCDC constant current drive module 1301, a DCDC constant current drive module 1302, and a DCDC constant voltage drive module 1305. The DCDC constant current drive module 1301 is used to control the low beam function, the DCDC constant current drive module 1302 is used to control the high beam function, and the DCDC constant voltage drive module 1305 and the CAN transceiver module 1502 jointly control the LED load to realize the dynamic signal light function; the switch module 140 in the platform drive control device 1 in configuration three includes two low-side switches LSD1 and LSD2 and a four-way high-side switch HSS; the communication module 150 in the platform drive control device 1 in configuration three includes three CAN transceiver modules 1502, which are used to obtain the message and the wake-up signal obtained by the KL15 pin to jointly control the lighting function and for the DCDC constant voltage drive module 1305 and the CAN transceiver module 1502 jointly control the LED load to realize the dynamic signal light function and the control function of the grille light through the CAN transceiver module 1502; the MCU control module 120 introduces three NTC pins and four RBIN pins; the LDO module 110 in the platform drive control device 1 in configuration three includes an LDO; the platform drive control device 1 in configuration three also includes a digital-to-analog converter DAC, one end of the digital-to-analog converter DAC is electrically connected to the MCU control module 120, and the other end is electrically connected to the drive device, one end of the high-side switch module is electrically connected to the MCU control module 120, and the other end is electrically connected to the drive device, the digital-to-analog converter DAC and the high-side switch module are used to jointly control the working state of the drive device based on the control instructions sent by the MCU control module 120, wherein the drive device includes an electric fan and a DC motor. In short, the input in configuration three is used to power KL30, which uses CAN messages to light up. It has two built-in constant current channels and one constant voltage channel, two low-side switches, and four high-side switches. The high-side switches power an external fan and a DC motor, and contain a private two-channel CAN.

[0056] like Figure 5As shown, the constant current and constant voltage drive module 130 in the platform drive control device 1 in the configuration four includes a DCDC constant current drive module 1301, a DCDC constant current drive module 1302, a DCDC constant current drive module 1303, a DCDC constant current drive module 1304, and a DCDC constant voltage drive module 1305. The DCDC constant current drive module 1301 is used to control the low beam function. The DCDC constant current drive module 1302, the DCDC constant current drive module 1303, the DCDC constant current drive module 1304 and the CAN transceiver module jointly control the realization of A DB function; the DCDC constant voltage drive module 1305 and the CAN transceiver module 1502 jointly control the LED load to realize the dynamic signal light function; the CAN transceiver module 1502 controls the LED load to realize the grille light function; the switch module 140 in the platform drive control device 1 in the configuration four includes two low-side switches LSD1, LSD2 and a four-way high-side switch HSS; the communication module 150 in the platform drive control device 1 in the configuration four includes four CAN transceiver modules 1502 for obtaining the message obtained in combination with the KL15 pin The wake-up signal jointly controls the lighting function and is used to jointly control the LED load based on the DCDC constant voltage drive module 1305 and the CAN transceiver module 1502 to realize the dynamic signal light function, and is used to realize the control function of the grille light through the CAN transceiver module 1502, and is used to jointly realize the ADB function of the LED load based on the combination of the DCDC constant current drive module and the CAN transceiver module; the MCU control module 120 introduces three NTC pins and four RBIN pins; the LDO module 110 in the platform-based drive control device 1 in configuration four includes an LDO; the platform-based drive control device 1 in configuration four also includes a digital-to-analog converter DAC, one end of the digital-to-analog converter DAC is electrically connected to the MCU control module 120, and the other end is electrically connected to the drive device, one end of the high-side switch module is electrically connected to the MCU control module 120, and the other end is electrically connected to the drive device, the digital-to-analog converter DAC and the high-side switch module are used to jointly control the working state of the drive device based on the control instruction sent by the MCU control module 120, wherein the drive device includes an electric fan and a DC motor. The platform-based drive control device also includes a motor driver, one end of which is electrically connected to the MCU control module, and the other end is externally connected to a stepper motor, for controlling the working state of the stepper motor based on the control instructions sent by the MCU control module. In short, configuration four adds two constant current channels, one CAN channel, and one stepper motor on the basis of configuration three, which can achieve 36-channel ADB. If you want to achieve ADB with more pixels, you can increase the number of constant current channels in configuration four.

[0057] It should be noted that if the above classification does not meet the application requirements, additional configuration categories can be added as needed. It is generally recommended that the platform drive configuration be 3-4. There is no restriction on the types of platform drive control devices here. Relevant technical personnel can increase the types of platform drive control devices based on the actual needs of users during the actual design process, that is, increase the number of configurations.

[0058] Preferably, the MCU control module 120 is also used to: obtain the voltage value of the BIN resistor obtained through the RBIN pin based on the configuration information pre-configured in the driver to retrieve the corresponding current value and / or voltage value; automatically adjust the current value or voltage value output by the constant current and constant voltage driver module through PWM dimming based on the current value and / or voltage value. Specifically, the configuration information includes a current configuration word relationship list and a function multiplexing configuration word relationship list, the current configuration word relationship list includes the correspondence between the voltage value of the BIN resistor and the current value output by the constant current and constant voltage driver module, and the function multiplexing configuration word relationship list includes the correspondence between the configuration word, the configuration word value and the function. That is, the headlight drive can be combined with the BIN resistor attached to the LED light board through the ADC network, and the voltage value of the BIN resistor can be read through the MCU control module 120, and the corresponding current value of the corresponding constant current channel output can be adjusted through PWM dimming. The LED power for standard high and low beams differs from that for ADB high beams. The former is generally 3W per LED, while the latter is generally 1-2W per LED. Signal lights can use 0.2W, 0.5W, or even 1W or 3W. To distinguish between different loads, platform-based drivers require configuration words. This information is stored in the driver through software. Different configuration words are used to identify the multiplexing of different loads or functions within a module, and then the values ​​within the configuration word categories are used to determine whether the module is being used. This allows for configurable hardware functions and operating parameters. Table 3 shows the relationship between the high and low beam RBIN and output current; Table 4 shows the relationship between the RBIN and output current for signal light configuration one; Table 5 shows the relationship between the RBIN and output current for signal light configurations two, three, and four; Table 6 shows the current configuration word for signal light configuration one; and Table 7 shows the current configuration words for high and low beam configurations one, two, three, and four. For example, when the power of a single LED in the LED load is 0.5W, the corresponding configuration word is 1 and the configuration word value is 0. The output current is 60-150mA / CH, as shown in Table 5, which is consistent with the configuration word value of 0 in Table 5. When the power of a single LED in the LED load is 1W, the corresponding configuration word is 1 and the configuration word value is 1. The output current is 210-300mA / CH, as shown in Table 5, which is consistent with the configuration word value of 1 in Table 5. When the power of a single LED in the LED load is 3W, the corresponding configuration word is 1 and the configuration word value is 2. The output current is 700-1150mA / CH, as shown in Table 5, which is consistent with the configuration word value of 2 in Table 5. It should be noted that the specific values ​​in the pre-set configuration information are not limited herein, and relevant technicians can modify the correspondence between the configuration word and the output current based on actual needs.

[0059] Table 3:

[0060]

[0061] Table 4:

[0062]

[0063] Table 5:

[0064]

[0065] Table 6:

[0066]

[0067] Table 7:

[0068]

[0069] Preferably, in order to achieve the effect of multiplexing high-side or low-side functions driven for different vehicle models, see Table 8-9, which shows that when the configuration word is 3 and 4 respectively, different configuration word values ​​indicate that LSD1 and LSD2 control different functional loads.

[0070] Table 8:

[0071]

[0072] Table 9:

[0073]

[0074] It should be noted that there is no specific restriction on the number of low-side switches herein, that is, relevant technical personnel can change the number of low-side switches during the actual design process, such as changing it to 1.

[0075] Preferably, the first input terminal of the MCU control module 120 is further connected to an NTC pin. The MCU control module 120 is further configured to control the current and / or voltage output by the constant current and constant voltage driver module 130 based on the resistance of the thermistor on the LED load inputted by the NTC pin, including: when the resistance of the thermistor is greater than a preset resistance threshold, the MCU control module 120 controls the current output by the constant current and constant voltage driver module to be reduced, thereby preventing damage to the LED load due to overheating.

[0076] Preferably, the constant current and constant voltage driving module 130 includes at least one constant current driving module and / or at least one constant voltage driving module, the constant current driving module includes multiple CC channels for driving the LED load to achieve static functions, and the constant voltage driving module includes multiple CV channels for driving the LED load to achieve dynamic functions.

[0077] In the above embodiment, by integrating each functional module into a platform-based drive control device, its hardware design is modularized, and the platform-based drive can be used on multiple vehicle models, avoiding repetitive driver development, thereby reducing the driver development cost and improving the versatility of the drive control device. By configuring the configuration word in the driver, the software design is made portable, and there is no need to redevelop the software for different drivers when facing different drivers. By solidifying the configuration word configuration in the driver, the platform-based headlight drive system can be applied to a variety of load conditions, and the functions of a certain module can also be reused, thereby making the platform drive more scalable. The platform-based drive has achieved unification in testing, production process, connector and structure heat dissipation, etc., realizing automated production and achieving the purpose of reducing costs.

[0078] It is worth noting that all modules involved in this embodiment are logical units. In actual applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovations of this invention, this embodiment does not include units that are not closely related to solving the technical problems proposed by this invention. However, this does not mean that other units do not exist in this embodiment.

[0079] Example 2

[0080] See also Figure 6 , this embodiment provides a flow chart of a platform-based headlight driving method.

[0081] As an example, the method includes:

[0082] S610: Obtain the voltage value of the BIN resistor through the RBIN pin.

[0083] S620: Retrieve the corresponding current value and / or voltage value based on the configuration information pre-configured in the driver.

[0084] S630: Automatically adjust the current value and / or voltage value output by the constant current and constant voltage driving module through PWM dimming based on the current value or voltage value.

[0085] S640: Drive the LED load to operate based on the output current value and / or voltage value.

[0086] It is not difficult to find that this embodiment is a method example corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment.

[0087] Example 3

[0088] An embodiment of the present invention further provides a storage medium storing a platform-based headlight driving method. When executed by a processor, the platform-based headlight driver implements the steps of the platform-based headlight driving method described above. Because this storage medium utilizes all the technical solutions of all the aforementioned embodiments, it possesses at least all the beneficial effects provided by the technical solutions of these embodiments, and therefore will not be further elaborated upon here.

[0089] Example 4

[0090] See also Figure 7 An embodiment of the present invention further provides an electronic device, comprising: a memory and a processor; the memory stores at least one program instruction; the processor implements the platform headlight driving method provided in Example 2 by loading and executing the at least one program instruction.

[0091] The memory 702 and processor 701 are connected using a bus. The bus can include any number of interconnected buses and bridges, connecting various circuits of one or more processors 701 and memory 702. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits. These are all well known in the art and, therefore, are not described further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be a single component or multiple components, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by the processor 701 is transmitted over a wireless medium via an antenna. Furthermore, the antenna receives data and transmits it to the processor 701.

[0092] The processor 701 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 702 can be used to store data used by the processor 701 when performing operations.

[0093] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A platform headlight driving system, characterized in that: The drive system includes at least one platform drive control device and an LED load connected to the platform drive control device. The platform drive control device is configured into at least four types, including configuration one, configuration two, configuration three, and configuration four. Each configuration corresponds to a different combination of functional modules to meet the functional requirements of headlights of different vehicle models. The platform drive control device includes: an anti-reverse connection module, an LDO module, an MCU control module, a constant current and constant voltage drive module, a switch module and a communication module; The anti-reverse connection module is electrically connected to the first input terminal of the constant current and constant voltage driving module, and is used to protect the constant current and constant voltage driving module; The first input end of the MCU control module is connected to the RBIN pin, and the first output end is connected to the second input end of the constant current and constant voltage drive module, and is used to automatically adjust the current value and / or voltage value output by the constant current and constant voltage drive module through PWM dimming based on the voltage value of the sub-BIN resistor obtained through the RBIN pin, including: the headlight drive is combined with the sub-BIN resistor attached to the LED lamp board through the ADC network, the voltage value of the sub-BIN resistor is read by the MCU control module, and the corresponding current value is adjusted by PWM dimming to output the corresponding constant current channel; The constant current and constant voltage driving module is externally connected to an LED load and is used to drive the LED load to operate based on the output current value and / or voltage value; The output end of the LDO module is electrically connected to the second input end of the MCU control module, and is used to provide an operating voltage for the MCU control module; The second output terminal of the MCU control module is electrically connected to the input terminal of the switch module, and is used to control the working state of the switch module through PWM; The communication module is electrically connected to the MCU control module, and is used to perform drive configuration and / or drive upgrade on the MCU control module through the communication module; The MCU control module is also used to: obtain the voltage value of the BIN resistor obtained through the RBIN pin based on the configuration information pre-configured in the driver to obtain the corresponding current value and / or voltage value; automatically adjust the current value or voltage value output by the constant current and constant voltage drive module through PWM dimming based on the current value and / or voltage value; the configuration information includes a current configuration word relationship list and a function multiplexing configuration word relationship list, the current configuration word relationship list includes the corresponding relationship between the voltage value of the BIN resistor and the current value output by the constant current and constant voltage drive module, and the function multiplexing configuration word relationship list includes the configuration word, configuration word, and function multiplexing configuration word relationship list. The correspondence between the configuration word value and the function, the MCU control module is configured to dynamically adapt to LED loads of different powers based on the current configuration word relationship list, and allocate the same switch module to different headlight functions according to the configuration word value based on the function reuse configuration word relationship list; the platform drive is configured using configuration words, and the configuration information is solidified on the driver through software. Different configuration words are used to identify the reuse of different loads or different functions of a module, and then judged by the value in the configuration word category, so that the hardware function is configurable, the operating parameters are configurable, and the function reuse and load adaptation of the same drive device in different vehicle models are supported.

2. The platform headlight driving system according to claim 1, characterized in that: The first input end of the MCU control module is also connected to the NTC pin, and the MCU control module is also used to control the current value and / or voltage value output by the constant current and constant voltage drive module based on the thermistor resistance on the LED load input by the NTC pin, including: when the thermistor resistance is greater than a preset resistance threshold, the MCU control module controls to reduce the current value output by the constant current and constant voltage drive module.

3. The platform headlight driving system according to claim 1, characterized in that: The constant current and constant voltage driving module includes at least one constant current driving module and / or at least one constant voltage driving module. The constant current driving module includes multiple CC channels for driving the LED load to achieve static functions. The constant voltage driving module includes multiple CV channels for driving the LED load to achieve dynamic functions.

4. The platform headlight driving system according to claim 1, characterized in that: The switch module includes at least one high-side switch module and / or at least one low-side switch module. The low-side switch module is grounded. The high-side switch module includes N high-side switches. The high-side switches are externally connected to a driving device.

5. The platform headlight driving system according to claim 4, characterized in that: The platform-based drive control device also includes a digital-to-analog converter, one end of which is electrically connected to the MCU control module, and the other end is electrically connected to the drive device. One end of the high-side switch module is electrically connected to the MCU control module, and the other end is electrically connected to the drive device. The digital-to-analog converter and the high-side switch module are used to jointly control the working state of the drive device based on the control instructions sent by the MCU control module.

6. The platform headlight driving system according to claim 5, characterized in that: The platform-based drive control device also includes a motor driver, one end of which is electrically connected to the MCU control module, and the other end is externally connected to a stepper motor, for controlling the working state of the stepper motor based on a control instruction sent by the MCU control module.

7. The platform headlight driving system according to claim 1, characterized in that: The communication module includes a CAN transceiver module and a LIN interface module. One end of the LIN interface module is used to receive LIN signals, and the other end is connected to the MCU control module. The LIN interface module is used to drive configuration and drive upgrades. One end of the CAN transceiver module is connected to the MCU control module, and the other end is connected to an external LED load for controlling the LED load.

8. A platform headlamp driving method, said method being applied to the platform headlamp driving system according to any one of claims 1 to 7, characterized in that: The method comprises: Get the voltage value of the BIN resistor through the RBIN pin; Retrieving the corresponding current value and / or voltage value based on the configuration information pre-configured in the driver; Automatically adjusting the current value and / or voltage value output by the constant current and constant voltage driving module through PWM dimming based on the current value or voltage value; The LED load is driven to operate based on the output current value and / or voltage value.

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