Platform headlamp driving system and driving method

Abstract

The invention provides a platform headlamp driving system and method, and belongs to the technical field of automobile lighting. The driving system comprises at least one platformization driving control device and an LED load connected with the platformization driving control device. The platformization driving control device comprises an anti-reverse-connection module used for protecting the constant-current constant-voltage driving module. The MCU control module is used for automatically adjusting the current value and / or the voltage value output by the constant-current constant-voltage driving module through PWM dimming based on the voltage value of the branch BIN resistor acquired through the RBIN pin; the constant-current and constant-voltage driving module is externally connected with an LED load and is used for driving the LED load to work based on the output current value and / or voltage value; the 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 switch module through PWM (Pulse Width Modulation); and the communication module is used for performing drive configuration and / or drive upgrading on the MCU control module. The development cost and the development period 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 headlight driving system and driving method. Background Art

[0002] With the development of automobile lighting technology, automobile headlights have evolved from traditional halogen headlights to intelligent and networked smart LED headlights. The functions of automobile headlights are increasing. For automobile lighting, different levels of models have very different functional requirements for headlights. The basic requirements for low-end models are that the high and low beam lights and signal lights (daytime running lights, position lights and turn signals) can be lit, and the height of the headlights can be adjusted in stages; mid-end models add dynamic flow of turn signals or unlock and welcome effects on the basis of low-end models; high-end models add advanced lighting and music light show functions such as ADB, AFS, and DLP on the basis of mid-end models. After the OEM assigns the project to the lighting factory, a project may contain multiple driver configurations. The lighting manufacturer provides customized lighting driver development for each configuration of the project. The customized driver needs to fully interpret the customer's needs and decompose it into each module. First of all, we must fully understand what the system requirements are, what are the external interfaces of the system, where are the boundaries of the system, and what loads and devices need to be driven. Secondly, we must determine the functional modules and fully consider whether each functional module circuit can meet the customer's requirements in terms of hardware, software and functional safety. During project development, it is necessary to conduct module testing, system testing, and diagnostic testing of simulated faults on the circuit modules, and continuously fix the driver's software and hardware bugs until it reaches a deliverable state. Because it is a custom-developed driver, this highly customized driver requires a very high development cost and a relatively long development cycle, which is far from meeting the rapid replacement of vehicle models.

[0003] That is, after the development of non-platform headlight drivers, they can only be adapted to one type of vehicle, and they do not have good versatility. Some hardware modules can be transplanted to other models, but due to the changes in the lighting distribution of other models, the LED load power is different, resulting in the software cannot be directly transplanted. Some hardware can be transplanted to another model, but due to differences in functions, some hardware modules are not needed or some hardware modules are missing, which may lead to problems such as waste of PCB area, too many hardware reserved modules or unsupported hardware modules, too large radiator, and mismatched structural dimensions. Therefore, for non-platform drivers, every time a car headlight driver is designed, all structural parts molds need to be re-molded, hardware needs to be redesigned, software also needs to be redesigned, and a set of matching testing and production process methods need to be formulated. These design and development costs need to be spread over the products sold, which not only increases the product price, but also causes resource waste due to excessive human resources.

[0004] The above problems need to be solved urgently. Summary of the invention

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

[0006] On the one hand, an embodiment of the present invention provides a platform-based headlight driving system, the driving system comprising at least one platform-based driving control device and an LED load connected to the platform-based driving control device, the platform-based driving control device comprising: an anti-reverse connection module, an LDO module, an MCU control module, a constant current and constant voltage driving 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 driving module 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 driving module to obtain a BIN resistance based on the divided BIN resistance obtained through the RBIN pin. The voltage value of the constant current and constant voltage driving module is automatically adjusted through PWM dimming; the constant current and constant voltage driving 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 a working 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 through the RBIN pin and retrieve the corresponding current value and / or voltage value based on the configuration information pre-configured in the driver; 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 realize static functions, and the constant voltage driving module includes multiple CV channels for driving the LED load to realize 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 switch is 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 a control instruction 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 externally connected to an 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; 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 headlight 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 headlight driving method by loading and executing the at least one program instruction.

[0018] The beneficial effects of the present invention are: (1) By integrating various functional modules into a platform-based drive control device, the 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.

[0019] (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.

[0020] (3) By solidifying the configuration word configuration in the driver, the platform-based headlight drive system can be adapted to a variety of load conditions, and the functions of a certain module can be reused, thereby making the platform drive more scalable.

[0021] (4) Platform-based driving has achieved unification in testing, production processes, connectors and structural heat dissipation, etc., realizing automated production and achieving the goal of reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the structure of a platform headlight driving system provided in Example 1 of the present invention.

[0024] Figure 2It is a schematic diagram of the structure of the first platform drive control device provided in Example 1 of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the second platform drive control device provided in Example 1 of the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the third platform-based drive control device provided in Example 1 of the present invention.

[0027] Figure 5 It is a schematic diagram of the structure of the fourth platform-based drive control device provided in Example 1 of the present invention.

[0028] Figure 6 This is a flow chart of a platform headlight driving method provided in Example 2 of the present invention.

[0029] Figure 7 This is a partial block diagram of an electronic device provided in Example 4 of the present invention. DETAILED DESCRIPTION

[0030] It should be mentioned before discussing the exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations as sequential processes, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of the 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.

[0031] It should be understood that, although the terms "first", "second", etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are used only to distinguish one unit from another unit. For example, without departing from the scope of the exemplary embodiments, the first unit may be referred to as the second unit, and similarly the second unit may be referred to as the first unit. The term "and / or" used herein includes any and all combinations of one or more of the listed associated items.

[0032] 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.

[0033] In order to facilitate subsequent understanding, the following professional terms are explained here: ADB: (adaptive driving beam, ADB), adaptive headlight; DLP: (digital light processing, DLP), digital lighting; AFS: (adaptive front-light system, AFS), adaptive front-light system; ALS: (automatic leveling system, ALS), automatic leveling system; DBL: (dynamic bending light, DBL), dynamic bending light; LDO: (low dropout regulator, LDO), low voltage dropout linear regulator; DAC: digital-to-analog converter; PWM: (pulse width modulation, PWM), pulse width modulation.

[0034] Example 1 For ease of understanding, the invention concept is generally described before describing the embodiments of the present invention in detail: when designing the platform-based headlight driver, firstly, the headlight platform-based driver is divided into several configurations based on actual applications. The configuration should include all the application ranges of the headlight driver, because the headlight manufacturer customizes and develops the headlight drivers for different models. The configuration types of all platform-based drivers are generally evaluated based on the needs of the OEM and the experience of the drivers developed within the company. The basic principle of platform-based driver classification is based on the communication mode between the headlight driver and the body domain, whether it is pure hard-line lighting, whether it has LIN communication, whether it has CAN communication, etc. In order to describe the classification method in detail, the platform-based drive control device is divided into 4 categories in combination with most of the car configuration types in the market, as shown in Table 1: Configuration 1, Configuration 2, Configuration 3 and Configuration 4. The functions of different configurations increase from less to more. According to different configurations, the platform-based drive control device is modularly configured. The functional modules configured by different platform-based drive control devices are shown in Table 2. And the LED load or function is classified by software configuration words. According to the different loads and the types of configuration words, a configuration method for adjusting the output current of the constant current channel is realized by reading the configuration word value. This ensures that a platform-based drive control device can be commonly used in 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 the configuration word method, when a certain function uses LED loads of different powers in different vehicle models, the constant current channel output current corresponding to the function of the platform-based drive can be commonly used to drive LED loads of different powers, and 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 the configuration word method.

[0035] Table 1:

[0036] Table 2:

[0037] The specific implementation is as follows: like Figure 1 FIG. 1 is a schematic diagram of the structure of a platform headlight driving system provided by the present invention.

[0038] 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, and is used to protect 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, and is used to automatically dim 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 driving module 130; the constant current and constant voltage driving 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 a working 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.

[0039] Preferably, combined Figure 2-5 As shown, there are schematic diagrams of the structure of the platform headlight drive system corresponding to configuration one, configuration two, configuration three and configuration four.

[0040] Specifically, Figure 2As shown, the constant current and constant voltage driving module 130 in the platform-based driving control device 1 in configuration one includes a DCDC constant current driving module 1301, a DCDC constant current driving module 1302, a DCDC constant current driving module 1303 and a DCDC constant current driving module 1304, the DCDC constant current driving module 1301 is used to control the low beam function, the DCDC constant current driving module 1302 is used to control the high beam function, the DCDC constant current driving module 1303 is used to control the turn signal function, and the DCDC constant current driving module 1304 is used to control the daytime running light / position light function; the switch module 140 in the platform-based driving control device 1 in configuration one includes two low-side switches LSD1 and LSD2; the communication module 150 in the platform-based driving control device 1 in configuration one includes a LIN interface module 1501 for configuring the drive and the upgrade of the drive; the MCU control module 120 introduces three NTC pins and four RBIN pins; the LDO module 110 in the platform-based driving control device 1 in configuration one includes one LDO. The input power of different functions is separated independently, generally to power the high-side switch or efuse of the upper domain controller; turning on the power supply of different functions can light up the corresponding lighting function.

[0041] like Figure 3 As shown, 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 the 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.

[0042] like Figure 4As shown, the constant current and constant voltage driving module 130 in the platform-based driving control device 1 in configuration three includes a DCDC constant current driving module 1301, a DCDC constant current driving module 1302, and a DCDC constant voltage driving module 1305. The DCDC constant current driving module 1301 is used to control the low beam function, the DCDC constant current driving module 1302 is used to control the high beam function, and the DCDC constant voltage driving 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-based driving 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-based driving control device 1 in configuration three includes three CAN transceiver modules 1502, which are used to obtain the wake-up signal obtained by combining the message with the KL15 pin to jointly control the lighting function and for use based on the DCDC constant voltage driving module 1305 and the CAN transceiver module 1502 jointly control the LED load to realize the dynamic signal light function and to realize 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-based drive control device 1 in configuration three includes an LDO; the platform-based 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 the lamp. 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 2-channel CAN.

[0043] like Figure 5As shown, the constant current and constant voltage driving module 130 in the platform driving control device 1 in the configuration four includes a DCDC constant current driving module 1301, a DCDC constant current driving module 1302, a DCDC constant current driving module 1303, a DCDC constant current driving module 1304, and a DCDC constant voltage driving module 1305. The DCDC constant current driving module 1301 is used to control the low beam function, and the DCDC constant current driving module 1302, the DCDC constant current driving module 1303, the DCDC constant current driving 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 combined with the KL15 pin to obtain 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 2 constant current channels, 1 CAN and 1 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 of configuration four.

[0044] 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-based drive configuration be 3-4. There is no restriction on the types of platform-based drive control devices here. Relevant technical personnel can increase the types of platform-based drive control devices based on the actual needs of users during the actual design process, that is, increase the number of configurations.

[0045] Preferably, the MCU control module 120 is also used to: retrieve the current value and / or voltage value corresponding to the voltage value of the sub-BIN resistor obtained through the RBIN pin based on the configuration information pre-configured in the driver; 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. 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 sub-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 correspondence between the configuration word, the configuration word value and the function. That is, the headlight driver can read the voltage value of the sub-BIN resistor through the ADC network combined with the sub-BIN resistor attached to the LED lamp board through the MCU control module 120, and adjust the corresponding current value of the corresponding constant current channel output through PWM dimming. The LED power of ordinary high and low beams is different from that of ADB high beams. The former is generally 3w per piece, while the latter is generally 1-2w per piece. Some signal lights use 0.2w, some use 0.5w, and some use 1w or 3w. In order to distinguish different loads, platform-based drivers need to use configuration words to configure. 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 the values ​​in the configuration word category are used to judge, so that the hardware functions and operating parameters can be configured. As shown in Table 3, it is a table of the relationship between the high and low beam RBIN and the output current; as shown in Table 4, it is a table of the relationship between the RBIN and the output current of the configuration of one signal light; as shown in Table 5, it is a table of the relationship between the RBIN and the output current of the configuration of two, three and four signal lights; as shown in Table 6, it is a configuration word for the current of the configuration of one signal light; as shown in Table 7, it is a configuration word for the current of the high and low beams of configuration one, two, three and four. Take Table 6 as an example for explanation. When the power of a single LED in the LED load is 0.5W, the corresponding configuration word is 1, the configuration word value is 0, and the output current refers to Table 5, which is consistent with the configuration word value of 0 in Table 5, which is 60-150mA / CH; when the power of a single LED in the LED load is 1W, the corresponding configuration word is 1, the configuration word value is 1, and the output current refers to Table 5, which is consistent with the configuration word value of 1 in Table 5, which is 210-300mA / CH; when the power of a single LED in the LED load is 3W, the corresponding configuration word is 1, the configuration word value is 2, and the output current refers to Table 5, which is consistent with the configuration word value of 2 in Table 5, which is 700-1150mA / CH. It should be noted that the specific values ​​in the pre-set configuration information are not limited here, that is, the relevant technical personnel can change the corresponding relationship between the configuration word and the output current based on actual needs.

[0046] Table 3:

[0047] Table 4:

[0048] Table 5:

[0049] Table 6:

[0050] Table 7:

[0051] Preferably, in order to achieve the high-side or low-side function multiplexing effect corresponding to different vehicle models, see Table 8-9, which indicates that when the configuration word is 3 and 4 respectively, different configuration word values ​​indicate that LSD1 and LSD2 control different functional loads.

[0052] Table 8:

[0053] Table 9:

[0054] 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.

[0055] Preferably, the first input terminal of the MCU control module 120 is also connected to the NTC pin, and the MCU control module 120 is also used to control the current value and / or voltage value output by the constant current and constant voltage drive module 130 based on the thermistor resistance value on the LED load input by the NTC pin, including: when the thermistor resistance value is greater than a preset resistance threshold value, the MCU control module 120 controls to reduce the current value output by the constant current and constant voltage drive module, so as to avoid the situation where the LED load is damaged due to overheating.

[0056] 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 realize static functions, and the constant voltage driving module includes multiple CV channels for driving the LED load to realize dynamic functions.

[0057] In the above embodiments, by integrating each functional module into a platform-based drive control device, the hardware design thereof is modularized, and the platform-based drive can be used on multiple vehicle models, avoiding repetitive development of the drive, thereby reducing the drive 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 function of a certain module can also be reused, thereby making the platform drive more extensible. 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.

[0058] It is worth mentioning that all modules involved in this embodiment are logical units. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by the present invention, but this does not mean that there are no other units in this embodiment.

[0059] Example 2 See also Figure 6 , this embodiment provides a flow chart of a platform headlight driving method.

[0060] As an example, the method includes: S610: Obtain the voltage value of the BIN resistor through the RBIN pin.

[0061] S620: Retrieve the corresponding current value and / or voltage value based on the configuration information pre-configured in the driver.

[0062] 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.

[0063] S640: Drive the LED load to operate based on the output current value and / or voltage value.

[0064] It is not difficult to find that this embodiment is a method embodiment 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 in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

[0065] Example 3 The embodiment of the present invention further provides a storage medium, on which a platform-based headlight driving method is stored, and when the platform-based headlight driving program is executed by a processor, the steps of the platform-based headlight driving method described above are implemented. Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0066] Example 4 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.

[0067] The memory 702 and the processor 701 are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors 701 and the memory 702 together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor 701 is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor 701.

[0068] 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.

[0069] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can know all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant 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 deformations and improvements can be made, which should also be regarded as the scope of protection of the present invention, which 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-based headlight drive system, It is characterized in that The driving system includes at least one platform-based driving control device and an LED load connected to the platform-based driving control device, wherein the platform-based driving control device includes: an anti-reverse connection module, an LDO module, an MCU control module, a constant current and constant voltage driving 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 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 divided BIN resistor obtained through the RBIN pin; The constant current and constant voltage driving module is externally connected to an LED load, and is used to drive the LED load to work based on an 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 a working 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.

2. The platform headlight driving system according to claim 1, It is characterized in that The MCU control module is also used for: The voltage value of the BIN resistor obtained through the RBIN pin is used to retrieve the corresponding current value and / or voltage value based on the configuration information pre-configured in the driver; The current value or voltage value output by the constant current and constant voltage driving module is automatically adjusted through PWM dimming based on the current value and / or voltage value.

3. The platform headlight driving system according to claim 2, It is characterized in that 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 drive module. The function multiplexing configuration word relationship list includes the correspondence between the configuration word, the configuration word value and the function.

4. The platform headlight driving system according to claim 1, It is 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.

5. The platform headlight driving system according to claim 1, It is 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 realize static functions. The constant voltage driving module includes multiple CV channels for driving the LED load to realize dynamic functions.

6. The platform headlight driving system according to claim 1, It is 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, and the high-side switch is externally connected to a driving device.

7. The platform headlight driving system according to claim 6, It is 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.

8. The platform headlight driving system according to claim 7, It is 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.

9. The platform headlight driving system according to claim 1, It is 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.

10. A platform headlight driving method, the method being applied to the platform headlight driving system according to any one of claims 1 to 9, It is 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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