CN114296383A

CN114296383A - Optical display hardware control platform

Info

Publication number: CN114296383A
Application number: CN202210195973.XA
Authority: CN
Inventors: 卢睿
Original assignee: Shenzhen Ruisi Huachuang Technology Co ltd
Current assignee: Shenzhen Ruisi Huachuang Technology Co ltd
Priority date: 2021-10-21
Filing date: 2022-03-02
Publication date: 2022-04-08

Abstract

An optical display hardware control platform. The optical display hardware control platform comprises a host input circuit, a power supply circuit system, an MCU module, a photosensitive sensor circuit, a CAN circuit, a LINK circuit, a motor drive circuit and an image transmission module; the host input circuit is arranged at the input end of the optical display hardware control platform and used for providing stable and clear power and signal sources for the optical display hardware control platform, and comprises an IIC host socket, an L-type filter circuit and a signal input module; the IIC host socket is an 8PIN host socket. The optical display hardware control platform is provided with a digital environment light sensor control and power isolation circuit and an L-shaped filter circuit, meanwhile, CAN and LIN signals are transmitted by adopting differential signals, and meanwhile, an ESD (electro-static discharge) electrostatic protection tube is additionally arranged on a main control module, so that the optical display system is good in stability and high in accuracy.

Description

Optical display hardware control platform

Technical Field

The invention relates to an optical display device, in particular to an optical display hardware control platform which is provided with a digital ambient light sensor control and power supply isolation circuit and an L-shaped filter circuit, simultaneously CAN and LIN signals are transmitted by adopting differential signals, and simultaneously an ESD (electro-static discharge) electrostatic protection tube is additionally arranged on a main control module, so that the stability is good and the precision is high.

Background

Augmented reality new line display AR-HUD combines image information in actual traffic road conditions through the optical system of inside special design accurately, projects driving auxiliary information such as tire pressure, speed, rotational speed, navigation on automobile front windshield, makes the driver in the driving, need not the low head just can look over car relevant information to can obtain better driving safety, mutual convenience, driving intelligence.

The AR-HUD overall structure mainly comprises a main control PCB, an LED light source, a projection display and a reflector component, wherein the main control PCB is an integral electronic circuit control system of the AR-HUD, the main control PCB mainly comprises electronic circuit components and IC chips and forms each standardized control module of optical display, and therefore the AR-HUD can be operated efficiently and accurately.

At present, the hardware control platform of the AR-HUD is still imperfect, and the following problems mainly exist:

1. the image transmission control function is incomplete, seamless fusion of various augmented reality technologies cannot be realized, ultrahigh-definition image output cannot be realized, and meanwhile, the visual angle is relatively narrow, so that the requirement of optical display which progresses day by day cannot be met;

2. in the design of a high-speed PCB and a system, a high-frequency signal line, pins of an integrated circuit, various connectors and the like can become a radiation interference source with antenna characteristics, can emit electromagnetic waves and influence other systems or the normal work of the system, most of the existing optical display control systems have poor anti-interference performance, so that the stable transmission of signals in optical display is influenced, the stability of the display system is influenced, and the quality of displayed images is poor;

3. the signal transmission of the existing optical display control system mainly adopts single-ended signals, and adopts a method of one signal wire and one ground wire, so that common-mode electromagnetic interference on the signal wire cannot be filtered, external electromagnetic interference is easily generated, and the normal work of other electronic equipment under the same electromagnetic environment can be influenced;

4. in one day, the light angles of the sun irradiating the earth are different, the light intensity is different, the light source of the conventional HUD is always the same brightness, the sun light is strong in the middle of the day, the HUD picture cannot be clearly seen, the light is weak at night, the HUD picture is too dazzling, and the comfort and experience of a driver are not good;

5. static electricity is usually generated artificially, for example, in the processes of production, assembly, test, storage, transportation and the like, static electricity may be accumulated in a human body, an instrument or equipment, even static electricity may be accumulated in a component itself, because static electricity is usually very high in instantaneous voltage (> thousands volts), it is very important to prevent static damage to all circuit designs and product manufacturing, especially, it is very important to eliminate the influence of static electricity pulse because optical parts of an augmented reality head-up display AR-HUD are relatively precise and the requirement for quality of an optical display image is high, but in the prior art, the static protection performance is poor, and the influence on a network module or an MCU master control module is obvious.

Disclosure of Invention

The invention aims to solve the technical problems and provides an optical display hardware control platform which is provided with a digital ambient light sensor control and power isolation circuit and an L-shaped filter circuit, meanwhile, CAN and LIN signals are transmitted by adopting differential signals, and meanwhile, an ESD (electro-static discharge) protection tube is additionally arranged on a main control module, so that the optical display system has good stability and high precision.

In the invention, the MCU is a micro control unit, the CAN is a controller area network, the ALS is a digital ambient light sensor, the TVS is a transient diode, and the PSRR is a power supply voltage noise suppression coefficient.

In order to solve the above-mentioned prior art problems, the technical scheme of the invention is as follows:

the optical display hardware control platform is a main control PCB which is provided with an integral electronic circuit control system of the AR-HUD, and the main control PCB consists of electronic circuit components and IC chips and forms each standardized control module of the optical display, so that the AR-HUD can be efficiently and accurately operated;

the optical display hardware control platform comprises a host input circuit, a power supply circuit system, an MCU module, a photosensitive sensor circuit, a CAN circuit, a LINK circuit, a motor drive circuit and an image transmission module;

the host input circuit is arranged at the input end of the optical display hardware control platform and used for providing stable and clear power and signal sources for the optical display hardware control platform, and comprises an IIC host socket, an L-type filter circuit and a signal input module; the IIC host socket is an 8PIN host socket and is used for a power supply and a signal input end of an optical display hardware control platform, the IIC host socket comprises a BATT + power supply output PIN, the BATT + power supply output PIN is used for inputting a BATT + power supply of a vehicle battery to the optical display hardware control platform through the IIC host socket for power supply, the L-type filter circuit comprises a BATT + power supply input interface and a B + power supply output interface, the BATT + power supply input interface is connected to the BATT + power supply output PIN of the IIC host socket, and the B + power supply output interface is connected to each power supply management chip of a power supply circuit system for processing to form voltage and current required by each module;

the power supply circuit system comprises a switch circuit, a LDO 12V-to-3.3V power supply circuit, a LDO 12V-to-5V power supply circuit, a DC-DC 12V-to-3.3V power supply circuit, a DC-DC 12V-to-26V power supply circuit and a MOTOR DRIVER power supply circuit; the switch circuit is arranged at the input end of the power supply circuit system, the switch circuit is accessed by a 12V interface, the switch circuit adopts a B + interface as an output end, the switch circuit is provided with an MOS (metal oxide semiconductor) tube, a triode and a plurality of resistors, the MOS tube is a voltage-controlled element, the MOS tube is conducted by the voltage required by the voltage-controlled element, the voltage drop of a conducting junction is minimum, so that the switch function is realized, a plurality of input pins of the MOS tube are respectively connected with the 12V interface, a plurality of output pins of the MOS tube are respectively connected with the B + interface, the base terminal of the triode is accessed to one output pin of the MOS tube, the MOS tube is a field effect tube, the current can be controlled by utilizing the electric field effect, the impact of a vehicle power supply source on each circuit unit can be effectively protected, each component can be protected from being damaged and interfered, the triode is an NPN tube, when the level is high, the triode is switched on when in the on state, and is switched off when in the off state when in low level, and the triode switch is controlled by software codes, so that the device is convenient and fast; the output end of the LDO 12V-to-3.3V power supply circuit is respectively connected with the RST interface, the ROM interface and the MCU3.3 interface and is respectively used for reset power supply, storage power supply and MCU power supply, the LDO 12V to 3.3V power supply circuit is connected through a B + interface, the output end of the LDO 12V to 5V power supply circuit is connected with a CAN-5V interface, used for CAN power supply, the LDO 12V to 5V power supply circuit is connected through a B + interface, the output end of the DC-DC 12V to 3.3V power supply circuit is respectively connected with an ALS interface, a DES interface and an LCD interface, the output end of the DC-DC 12V-to-26V power supply circuit is connected with an LED interface, the ALS interface, the DES interface, the LCD interface and the LED interface are respectively used for photosensitive sensor power supply, deserializer power supply, LCD power supply and LED power supply, and the input end of the power supply circuit system is also connected with the LIN interface and the DLP interface;

the MCU module adopts an MCU singlechip for system control of an optical display hardware control platform, the MCU singlechip adopts an IC-S32K142 chip of TI brand, the quiescent current of the MCU singlechip is less than 2 milliamperes, the MCU singlechip at least comprises motor drive control, reset control, debugging port control, LCD backlight control, CAN communication control, deserializer communication control, reserved I/O port control, reserved serial port control and EEPROM memory control, and the IC-S32K142 chip is 64 pins;

the photosensitive sensor circuit is assembled into a PCBA, the PCBA comprises a PCB, an IIC socket, a resistor, a capacitor and an OPT3001 photo-sensing chip, wherein the OPT3001 photo-sensing chip is a digital ambient light sensor ALS with a high-precision human eye response function; the OPT3001 light-induced chip comprises an SDA pin, an SCL pin, an INT pin, an ADDR pin, a VDD pin and a GND pin, wherein the SDA pin, the SCL pin and the INT pin are respectively connected into an IIC socket, the VDD pin is an output pin and used for being connected into a PGU (phase generated Unit) image unit, the OPT3001 light-induced chip is driven through an IIC, a driving address of the OPT3001 light-induced chip is configured through the ADDR, the SDA pin is a data line, the SCL pin is a control line, after the IIC is driven, relevant data of the OPT3001 light-induced chip are obtained through reading a responding register address and used for verifying a sensor, the optical display hardware control platform is used for system control of an AR _ HUD, the PCBA is installed above a light outlet of the AR _ HUD and is designed to be installed at a special angle to sense sunlight penetrating through a windshield of an automobile, and according to the rising and falling angle of the sun, the OPT3001 can immediately detect the change of optical parameters, and then control and output the optical parameters to the PGU through the VDD pin, and adjust the brightness of the PGU to adapt to the comfort level of human eyes; the INT pin is a signal interruption function pin and is used for detecting external equipment, and external interruption is triggered when the INT pin is pulled down by the external equipment; the pin of the IIC socket is also connected with the MCU, and the photosensitive sensor circuit is communicated with the MCU through the IIC socket;

the CAN circuit and the LINK circuit are network circuit structures of an optical display hardware control platform, the CAN circuit is a controller area network circuit, and the LINK circuit is a serial communication network circuit; the CAN circuit adopts a TJA1043T chip, pins of the TJA1043T chip comprise a VIO input and an SPLIT voltage output, the pins of the TJA1043T chip are respectively connected into CAN3.3V and CAN5V and CAN be directly connected with 3.3V and 5V input power supplies, the SPLIT voltage output is used for stabilizing the level of a recessive bus, and the node diagnosis and fault containment listen-only mode of the TJA1043T chip adopts SO14 and HVSON14 packaging, SO that the improved automatic optical detection AOI function is realized, the HVSON14 packaging adopts a 3.0 mm 4.5 mm specification, and the low electromagnetic radiation EME and high electromagnetic interference immunity EMI are realized; the TJA1043T chip is a high-speed CAN transceiver and provides an interface between a controller area network CAN protocol controller and a physical two-wire CAN bus, the TJA1043T chip is used for high-speed CAN application in the automobile industry, the network speed of the TJA1043T chip is up to 1 Mbit/s, the TJA1043T chip is a microcontroller with a CAN protocol controller and provides differential transmitting and receiving functions, and the TJA1043T chip provides improved electromagnetic compatibility and electromagnetic discharge ESD performance; the signal transmission of the CAN circuit and the LINK circuit adopts a differential transmission mode;

the MOTOR driving circuit comprises a stepping MOTOR, a MOTOR driving chip, an MCU interface group, a 4PIN socket, a MOTOR12V power interface and a MOTOR 3.3V power interface; the motor driving chip adopts DRV8824QPWPRQ 1; the MOTOR12V power interface and the MOTOR 3.3V power interface are respectively connected to a power supply circuit system and used for power supply input of a MOTOR driving circuit;

the image transmission module comprises an FPD-LINK socket, a deserializer, a light source for generating an image and a backlight light source circuit for generating a backlight light source; the FPD-LINK socket inputs HSD high-speed signals FPD-LINK, the deserializer adopts a DS90UB928 chip, an input pin of the DS90UB928 chip is connected to an output end of the FPD-LINK socket, and an output pin of the DS90UB928 chip is connected with a light source; the light source provides three modes of DLP, TFT2.6 inches and TFT4.1 inches, the light source comprises a DLP image processing unit and a TFT screen, when the light source is in the DLP mode, the DS90UB928 chip of the deserializer processes and outputs an I2C0 signal to the DLP image processing unit by using a protocol of I2C0, and when the light source is in the TFT2.6 inches and TFT4.1 inches, the DS90UB928 chip of the deserializer conducts an image signal to the TFT screen by using an LVDS protocol; the FPD-LINK adopts differential signal input, the FPD-LINK socket is connected with IN + and IN-pins, the IN + and IN-pins are respectively connected with a differential signal wire as the input of the FPD-LINK socket, and the two differential signal wires are provided with a common-mode inductor and used for inhibiting the system from transmitting and interfering outwards; an 2/3/5/6/7/8/10 input or output port of the FPD-LINK socket is provided with an ESD (electro-static discharge) electrostatic protection tube for improving the electrostatic protection capability of the system; pins of the deserializer DS90UB928IC chip connected with the TFT screen include a clock signal line pin CLK +, CLK-, the output ends of the clock signal line pin CLK +, CLK-are provided with a common mode inductor, the clock signal line pin CLK +, CLK-are used for providing clock signals, the clock signals are used for playing a role of a timer in a synchronous circuit, and related electronic components are guaranteed to be synchronously operated, the common mode inductor is a two-way filter, on one hand, common mode electromagnetic interference on the signal line is filtered, on the other hand, electromagnetic interference which is not emitted outwards is restrained, normal work of other electronic equipment under the same electromagnetic environment is avoided being influenced, the frequency of the clock signals is guaranteed to be high, and meanwhile, the precision is also high.

Further, the signal input module of the host input circuit comprises a CAN-H interface, a CAN-L interface, an LIN interface, an IGN1+ interface and an ADC-KEY interface, the signal input module also comprises pins of an IIC host socket which are respectively connected with the CAN-H interface, the CAN-L interface, the LIN interface, the IGN1+ interface and the ADC-KEY interface, the CAN-H interface and the CAN-L interface are used for inputting CAN signals, the CAN signals adopt a differential signal transmission mode to avoid mutual interference between the product and the vehicle signals, two differential signal lines are provided with a common mode inductor and are used for inhibiting the system from transmitting interference outwards, the differential signal transmission is a signal transmission technology and is different from the traditional method of one signal line and one ground line, the differential signal transmission transmits signals on the two signal lines, the amplitude of the two signals is equal, the phase is opposite, compared with a single-ended signal, the differential signal has strong anti-interference capability, the common-mode inductor is a two-way filter, on one hand, common-mode electromagnetic interference on a signal line is filtered, on the other hand, the common-mode inductor also inhibits the common-mode electromagnetic interference from emitting electromagnetic interference outwards, and the influence on the normal work of other electronic equipment in the same electromagnetic environment is avoided; ESD (electro-static discharge) electrostatic protection tubes are respectively arranged on signal lines connected with the CAN-H interface, the CAN-L interface, the LIN interface, the IGN1+ interface and the ADC-KEY interface and the IIC host socket and are used for improving the electrostatic protection capability of the system;

furthermore, the L-shaped filter circuit of the host input circuit is composed of a plurality of capacitors connected in parallel and an inductor, and is used for improving the anti-interference capability of the system, the capacitors connected in parallel adopt capacitor combinations with different frequencies and are used for filtering noise in different frequency bands, the L-shaped filter circuit is also used as an electric resonator, and the L-shaped filter circuit stores the energy of oscillation when the circuit resonates, is used for generating signals with specific frequencies and is also used for separating the signals with the specific frequencies from more complex signals; furthermore, the input end of the L-shaped filter circuit is provided with a clamping diode in parallel, the clamping diode is a TVS diode and is used for improving the anti-surge and transient conducted interference capability of the system and ensuring the stable operation of the system, the TVS diode is a diode-type high-efficiency protection device, when two poles of the TVS diode are impacted by reverse transient high energy, the TVS diode can change the high impedance between the two poles into low impedance at the speed of 10-12 seconds, absorb the surge power of thousands of watts and clamp the voltage between the two poles at a preset value, thereby effectively protecting precise components in an electronic circuit from being damaged by various surge pulses; furthermore, the input end of the L-shaped filter circuit is also connected with an anti-reverse diode in series for polarity protection in the circuit;

furthermore, in the power supply circuit system, the LDO 12V to 3.3V power supply circuit and the LDO 12V to 5V power supply circuit use LDO power management chips, the LDO 12V to 3.3V power supply circuit use LDO _ TPS7a6933QDRQ1 chips, the LDO 12V to 5V power supply circuit use LDO _ TPS7B8150QDRVRQ1 chips, the LDO chips have good buck and voltage regulation effects, since the vehicle supply voltage is unstable, buck and voltage regulation management needs to be performed through the power IC chip, and within the safe input range of the LDO chips, the output change of the LDO chips is small, so that stable output can be ensured, the LDO chips can perform power isolation, increase the PSRR of the power, so that the output signals are less affected by the power, after passing through the LDO chip circuits, useless converted signals are filtered out for the most part, the passing mainly useful direct current signals, and meanwhile, the LDO chips have low cost, low power consumption and low power, the CAN signal transmission is facilitated; the DC-DC 12V to 3.3V power supply circuit and the DC-DC 12V to 26V power supply circuit adopt DC _ DC power supply management chips, the DC-DC 12V to 3.3V power supply circuit adopts a DCDC _ TPS54240 chip, the DC _ DC power supply management chips have high power, can pass through large current without damage, can convert direct current high voltage into direct current low voltage, and can ensure constant low voltage, the DC _ DC power supply management chips comprise input and output isolation, maximum current limitation, output short circuit protection, input reverse connection protection, overcurrent protection and over-temperature protection, the over-temperature protection comprises that the output is closed when the internal temperature exceeds 85 ℃, and the operation is recovered when the internal temperature is lower than 80 ℃; the MCU power supply adopts independent power management circuit for guaranteeing stable voltage and power of MCU, and MCU adopts ordinary electricity 3.3V, guarantees the quick, high-efficient switching of system dormancy/awakening state, and the LDO _ TPS7A6933QDRQ1 who adopts is the power IC of low IQ, can reduce system quiescent current, the MCU power supply includes B + car power input port, and B + car power input port normal operating voltage is 9V-12V, and when being less than 8V, MCU is in the dormancy state, is favorable to reducing car storage battery energy consumption and reduces the risk of car storage battery feed. Further, the power supply circuit system adopts the input of the maximum estimated current high voltage of 1.2A or low voltage of 3.5A; further, the LDO and the DC _ DC of the power management chip are wide-voltage vehicle-scale power IC of TI brand; further, the quiescent current of the MCU power supply circuit is as low as 2 milliamperes;

furthermore, in the MCU module, pins of a MOTOR-RST, a MOTOR-SLEEP, a MOTOR-FAULT, a MOTOR-DECAY, a MOTOR-DIR, a MOTOR-ENB, a MOTOR-STEP and a MOTOR-HOME are adopted by the IC-S32K142 chip as input and output interfaces for MOTOR drive control, and the MOTOR drive control is carried out; the MCU singlechip further comprises an EEPROM (electrically erasable programmable read-only memory), the EEPROM adopts an N24C02UVTG chip, the IC-S32K142 chip is connected with the N24C02UVTG chip through SCL and SDA pins and used for realizing the control of the EEPROM memory of the MCU singlechip, a decoupling capacitor of 100nF/50V is arranged in the N24C02UVTG chip circuit and is connected between a power line VDD and a ground wire of the N24C02UVTG chip circuit, and the decoupling capacitor is used for enhancing the stability of the N24C02UVTG chip because the N24C02UVTG chip has weak anti-interference capability and large current change when being turned off; the MCU single chip microcomputer further comprises a plurality of reserved I/O ports, the reserved I/O ports are respectively connected to the IC-S32K142 chip through PTE4, PTE5, PTE9, PTE10, PTE11, PTD0, PTD1 and PTD15 to achieve reserved I/O port control of the MCU single chip microcomputer, the MCU module is further connected to a limit sensor, and the reserved I/O ports and the limit sensor structure are used for improving the universality and interchangeability of the platform; the MCU singlechip also comprises a reserved serial port which is connected into the IC-S32K142 chip through UART0-RX and UART0-TX pins, and ESD electrostatic protection tubes are respectively connected to the UART0-RX and UART0-TX pin circuits for avoiding electrostatic influence caused by the serial port and improving the electrostatic protection capability of the system; the MCU singlechip also comprises an OSC crystal oscillator circuit which adopts a crystal oscillator 8M/3225 and is used for providing a basic clock signal for a system, and the OSC crystal oscillator circuit is connected to the IC-S32K142 chip through XTAL and EXTAL pins; the MCU singlechip also comprises a RESET RESET circuit, the RESET RESET circuit adopts an IC-TPS3823-SOT-23-5-AA RESET chip, the RESET RESET circuit is connected into the IC-S32K142 chip through an RST-MCU pin and is used for realizing RESET control of the MCU singlechip, a pin circuit of the IC-TPS3823-SOT-23-5-AA RESET chip is provided with a decoupling capacitor, the decoupling capacitor is a ceramic chip capacitor, and the ceramic chip capacitor has low electrostatic loss ESL and high-frequency impedance and is used for enhancing the stability of the IC-TPS3823-SOT-23-5-AA RESET chip; the MCU singlechip also comprises a DEBUG debugging port circuit which is connected with the IC-S32K142 chip through JTAG-TDO, JTAG-TDI, RST-MCU, JTAG-TMS and JTAG-TCLK pins and is used for realizing the debugging port control of the MCU singlechip; the MCU single chip microcomputer further comprises a POWER POWER supply circuit, the POWER POWER supply circuit comprises MCU-3.3V, VDD and VDDA interfaces, the VDD and VDDA interfaces are respectively connected to the IC-S32K142 chip, the optical display hardware control platform further comprises a POWER supply circuit for converting LDO 12V into 3.3V, and the MCU-3.3V interface is connected with the output end of the POWER supply circuit for converting LDO 12V into 3.3V and used for POWER supply input of the MCU single chip microcomputer; the IC-S32K142 chip adopts CAN-EN, INH-DET, CAN-TXD, CAN-RXD, CAN-5V-EN, CAN-ERR, CAN-WAKE and CAN-STB pins as input and output interfaces of CAN communication control, and CAN communication control is carried out;

furthermore, in the MCU module, the OSC circuit is matched with a pll circuit to provide a clock frequency required by the system, and if different subsystems require clock signals with different frequencies, the clock frequency can be provided by different pll circuits connected to the same OSC circuit; furthermore, a 10K level pull-up resistor is respectively arranged between the JTAG-TDO, JTAG-TDI, RST-MCU, JTAG-TMS and JTAG-TCLK pins and the power line and is used for level pull-up; furthermore, the DEBUG debugging port circuit comprises a debugging port socket, and anti-interference resistors are respectively arranged between the pins of JTAG-TDO, JTAG-TDI, RST-MCU, JTAG-TMS and JTAG-TCLK and the debugging port socket and are used for inhibiting interference of spike signals brought by the socket; furthermore, the MCU-3.3V, VDD and VDDA interface lines are respectively provided with a decoupling capacitor, the decoupling capacitors are ceramic chip capacitors, and the ceramic chip capacitors have low electrostatic loss ESL and high-frequency impedance and are used for enhancing the stability of the POWER POWER supply circuit;

further, the photosensitive sensor circuit further comprises a power input interface ALS3.3V, and a magnetic bead is further arranged between the power input interface ALS3.3V and the power supply circuit for converting DC-DC 12V into 3.3V, so that the photosensitive sensor circuit is used for inhibiting high-frequency noise and spike interference on a signal line and a power line and has the capability of absorbing electrostatic pulses; the photosensitive sensor circuit is 3.3V in voltage, the current of the photosensitive sensor circuit is less than 2 milliamperes, the DC _ DC power supply management chip is high in power and can pass through large current without being damaged, direct current high voltage can be converted into direct current low voltage, constant low voltage can be guaranteed, the DC _ DC power supply management chip comprises input and output isolation, maximum current limitation, output short-circuit protection, input reverse connection protection, overcurrent protection and over-temperature protection, the over-temperature protection comprises that the output is closed when the internal temperature exceeds 85 ℃, and the work is recovered when the internal temperature is lower than 80 ℃; furthermore, the photosensitive sensor circuit adopts 5 pins of an IIC socket as input ends, the OPT3001 photosensitive chip adopts six pins, and the AADR pin line is provided with two resistors connected in parallel for signal selection; furthermore, electrostatic protection tubes are respectively arranged between the SDA pin line, the INT pin line, the SCL pin line and the IIC socket and are used for avoiding electrostatic influence caused by the socket and improving the electrostatic protection capability of the system; further, a level pull-up resistor is respectively arranged between the SDA pin line, the INT pin line, the SCL pin line and the power input interface ALS3.3V, and is used for level pull-up, and simultaneously, noise tolerance of a signal of the DC _ DC chip is improved, and anti-interference capability is enhanced, wherein the level pull-up resistor is a 10K resistor, and has low power consumption and less heat generation; furthermore, a 33 ohm anti-interference resistor is respectively connected in series between the SDA pin line, the INT pin line, the SCL pin line and the IIC socket and is used for inhibiting the interference of spike signals brought by the socket.

Further, in the CAN circuit and the LINK circuit, the TJA1043T chip further includes a differential signal input pin CAN-H, CAN-L for connecting a host socket to input a differential signal, the CAN-H pin line, the CAN-L pin line, the CAN3.3V power input line, and the CAN5V power input line are respectively provided with a common mode inductor, the common mode inductor is a magnetic bead connected in series, and the common mode inductor is a bidirectional filter, so that common mode electromagnetic interference on the signal line is filtered, and electromagnetic interference which is not emitted outwards is suppressed, thereby avoiding affecting normal operation of other electronic devices in the same electromagnetic environment; the LINK circuit adopts a TJA1027T/20 chip, is used for a serial communication network, and is based on a main node and a plurality of LINK slave nodes, wherein the number of the slave nodes is 16 at most; the circuit comprises a LINK circuit, a TVS clamping diode and a TVS, wherein the LINK circuit is connected with an L-shaped filter circuit through a B + interface and used for power input of the LINK circuit, the TVS clamping diode is a diode-shaped high-efficiency protection device, when two poles of the TVS diode are impacted by reverse transient high energy, the TVS diode can change high impedance between the two poles into low impedance at the speed of 10-12 seconds, absorb surge power of thousands of watts and clamp the voltage between the two poles at a preset value, so that precise components in an electronic circuit are effectively protected from being damaged by various surge pulses; the TJA1027T/20 chip further comprises differential signal input pins LIN-RX and LIN-TX which are used for being connected with a host socket to input differential signals, a LIN-RX pin line, a LIN-TX pin line and a B + power supply input line are respectively provided with a common mode inductor, the common mode inductor is a magnetic bead connected in series, the common mode inductor is a bidirectional filter, common mode electromagnetic interference on a signal line is filtered, electromagnetic interference which is not emitted outwards is restrained, and normal work of other electronic equipment under the same electromagnetic environment is prevented from being influenced; further, ESD electrostatic protection tubes are arranged at bus input or output ports of the CAN circuit and the LINK circuit, so that the electrostatic protection capability of the system is improved; further, the TJA1043T chip further comprises a CAN-INH pin, and the CAN-INH pin is connected to the triode switch circuit; further, the triode switching circuit adopts a triode MMBT3904-7-F, the triode MMBT3904-7-F is an NPN tube, when the control electrode level is high, the triode MMBT3904-7-F is in a switch-on state, when the control electrode level is low, the triode MMBT3904-7-F is in a switch-off state, and the triode switching circuit adopts software codes to control the CAN circuit, so that the device is convenient and fast;

further, in the MOTOR driving circuit, the MCU interface group includes a MOTOR-ENB, a MOTOR-FAULT, a MOTOR-SLEEP, a MOTOR-RST, a MOTOR-HOME, a MOTOR-delay, a MOTOR-DIR, a MOTOR-stem interface, and one end of the MOTOR-ENB, the MOTOR-FAULT, the MOTOR-SLEEP, the MOTOR-HOME, the MOTOR-default, the MOTOR-delay, the MOTOR-dependent, the MOTOR-default, the MOTOR-delay, the MOTOR-DIR, and the MOTOR-stem interface is respectively connected to NENBL, nflt, NSLEEP, NRESET, NHOME, the delay, DIR, and the MCU module, and the other end is connected to the MCU module for input and output between DRV8824QPWPRQ1 and the MCU module; the motor driving chip further comprises PINs AOUT1, AOUT2, BOUT1 and BOUT2 at the output end, the PINs AOUT1, AOUT2, BOUT1 and BOUT2 are respectively connected into a 4PIN socket through signal lines, and the output end of the 4PIN socket is connected with a stepping motor; the 4PIN socket ends of the AOUT1 signal lines, the AOUT2 signal lines, the BOUT1 signal lines and the BOUT2 signal lines are respectively connected with a filter capacitor in parallel, and the filter capacitors are used for preventing interference signals and ensuring the precision of pulse signals; the 4PIN socket ends of the AOUT1, AOUT2, BOUT1 and BOUT2 signal lines are respectively connected with a magnetic bead in series to prevent high-frequency noise and spike interference and ensure the electromagnetic compatibility of products, the magnetic beads have high resistivity and magnetic conductivity and are equivalent to series connection of a resistor and an inductor, but the resistance value and the inductance value change along with the frequency; further, an L-like circuit is arranged between the power interface of the MOTOR12V and the MOTOR driving chip, the L-like circuit comprises two C capacitors and an ECS electrolytic capacitor which are respectively connected in parallel, and the L-like circuit is formed into a low-tube filter and can effectively isolate medium-high frequency noise brought by a 12V power supply end; furthermore, a 10K resistor is respectively connected in series between the MOTOR 3.3V power interface and NENBL, NFAULT, NSLEEP, NRESET, NHOME, DECAY, DIR and STEP pins of the MOTOR driving chip, and is used for pulling up a level, stabilizing the potential of an output end and saving power consumption; furthermore, 100 ohm resistors are respectively connected in series between the MOTOR-ENB, the MOTOR-FAULT, the MOTOR-SLEEP, the MOTOR-RST, the MOTOR-HOME, the MOTOR-DECAY, the MOTOR-DIR, the MOTOR-STEP interface and pins NENBL, NFAULT, NSLEEP, NRESET, NHOME, DECAY, DIR and STEP of the MOTOR driving chip, and are used for noise suppression and signal precision guarantee; further, the step motor is a low-speed fine adjustment mechanism, the step motor adopts a bipolar step motor, the bipolar step motor adopts 20 steps to perform a step node, and the step motor adopts the bipolar step motor, and the step motor has the advantages that: 1. the overshoot is prevented, the maximum torque is achieved when the motor stops rotating, 2, the rotation precision is improved, the precision of each step is three to five percent, and the error of one step is not accumulated to the next step, so that the position precision and the motion repeatability are better, 3, the lens is prevented from shaking, the starting, stopping and reverse response are sensitive, the lens cannot shake freely in the rotation, the use comfort is improved, and the product quality is improved; 4. the service life is long, because there is no brush, the service life is long, the reliability is higher, the service life of the electrical machinery only depends on the life of the bearing, meet year and mileage requirement of the car rule, 5, cost advantage, the response of the electrical machinery is only determined by the digital input pulse, therefore can adopt the open loop control, this makes the structure of the electrical machinery can be simpler and control the cost;

further, the image transmission module comprises a power input interface 3.3V, a power access pin VDD33 and a power access pin VDDIO, the power access pin VDD33 and the power access pin VDDIO are respectively connected with a deserializer DS90UB928IC chip, the power input interface 3.3V is connected with a DC-DC 12V to 3.3V power supply circuit, then the power is output to the DS90UB928IC chip through the power access pin VDD33 and the power access pin VDDIO to supply power, the backlight light source circuit comprises an LED, and the DC-DC 12V to 26V power supply circuit is connected with the LED; the power supply of the image transmission module inputs 12V current from a host, then the current is filtered by an L-shaped filter circuit, then the current is processed by a power management chip DC _ DC of a power supply circuit system, and then the current is respectively connected to chips of the image transmission module; further, the image transmission module is also accessed with a CAN/LIN bus signal, the CAN/LIN bus signal and a power supply are accessed with a chip of the MCU module through an 8PIN host socket, the CAN/LIN bus signal is processed by the chip of the MCU module, then is output through a PIN and is transmitted to the deserializer, and then is output to the light source through the deserializer for display; further, a magnetic bead is respectively arranged between the power input interface 3.3V of the image transmission module and the power access pin VDD33 and the power access pin VDDIO, and is used for suppressing high-frequency noise and spike interference on a signal line and a power line and also has the capability of absorbing electrostatic pulses; furthermore, a plurality of decoupling capacitors are connected in parallel on a 3.3V line of a power input interface of the image transmission module to play a decoupling role;

further, the backlight source circuit is used for forming a backlight signal of optical display and forming image display with an image output signal, the backlight source circuit comprises a magnetic bead arranged at an input end, a filter capacitor group, a backlight driving chip IC _ TPS61194PWPRQ1 and a BOOST voltage boosting circuit, the filter capacitor group comprises three capacitors arranged in parallel, the backlight driving chip IC _ TPS61194PWPRQ1 comprises a plurality of pins, the backlight source circuit adopts 12V switching power supply input and is converted into BL _12V through the magnetic bead, then the filtered current is filtered through the filter capacitor group, the BL _12V supplies power to the SW pin of the backlight driving chip IC _ TPS61194PWPRQ1, so that the filtered current is connected to the input pin of the backlight driving chip, the pin of the backlight driving chip is also connected with the BOOST voltage boosting circuit, and the BL _12V is converted into 24V-28V output current through the backlight driving chip and the BOOST voltage boosting circuit, the output end of the backlight light source circuit is an LED + interface; the backlight driving chip IC _ TPS61194PWPRQ1 is an automobile high-efficiency LED driver integrated with a DC-DC converter, the backlight driving chip IC _ TPS61194PWPRQ1 is low electromagnetic interference EMI and easy to use driver, the backlight driving chip IC _ TPS61194PWPRQ1 comprises four combined high-precision current traps which can meet the requirement of 200-600 milliamperes of the backlight light source circuit, the DC-DC converter can provide adaptive output voltage control based on LED current sink headroom voltage, can regulate the voltage to the minimum level that can meet the needs under all conditions, thereby reducing the power consumption to the maximum extent, reducing the quiescent current of the whole machine, the DC-DC converter supports the spread spectrum aiming at the switching frequency and realizes the external synchronization by using a special pin, the adjustable frequency range of the DC-DC converter is large, so that the backlight driving chip IC _ TPS61194PWPRQ1 can avoid amplitude modulation radio frequency band interference; the backlight driving circuit is arranged on a backlight source PCB, the backlight source circuit is connected in by a socket, 8 LEDs are arranged on the backlight source PCB, an LED + interface is electrically connected with the 8 LEDs, a pin of the backlight driving chip IC _ TPS61194PWPRQ1 is also connected with two serially connected variable resistors, the magnitude of output current of the backlight source circuit is set by adjusting or replacing the two variable resistors, so that the output current is constantly output, and the backlight driving chip IC _ TPS61194PWPRQ1 further comprises an MOS (metal oxide semiconductor) tube for switching function;

further, in the backlight light source circuit, the BOOST voltage BOOST circuit is provided with an inductor L4, a diode D7 and a parallel capacitor bank which are connected in series, when a SW pin of the backlight driving chip IC _ TPS61194PWPRQ1 is conducted with a GND pin, the inductor L4 is in a charging state, the diode D7 is blocked reversely, the inductor L4 is charged and stores energy in a reverse direction, the BOOST voltage BOOST circuit feeds back a signal to the backlight driving chip IC through a resistor, the backlight driving chip IC instructs to close the inductor L4 for charging, the inductor L4 starts to charge the parallel capacitor bank through the diode D7, two ends of the parallel capacitor bank are raised, and when the voltage at two ends of the parallel capacitor bank is higher than the input voltage, the boosting is completed; furthermore, a plurality of feedback resistors are arranged at two ends of the diode D7 and used for feeding back charge and discharge signals or adjusting the pulse width or adjusting the charge and discharge time; further, the DC-DC converter supports boost and SEPIC modes of operation.

In one day, the sun is different to the light angle that the earth shines, then the power of light just also is different, and traditional HUD's light source is luminance all the time, and solar light is very strong at noon, and the HUD picture will be unclear, and light is too weak evening, and the HUD picture then is too dazzling, all brings not good effect to driver's comfort level and experience sense, the photosensitive sensor circuit is through designing environment light sensor and relevant circuit, according to the power of sunlight and adjust HUD's luminance, all brings very good effect to driver's comfort level and experience sense.

The working principle of the motor driving circuit is as follows:

the automobile camera captures human eyes and senses the moving positions of the human eyes, human eye related position signals are transmitted to the MCU module to be processed into position control signals, the MCU module transmits the position control signals to the motor driving chip, the motor driving chip processes the position control signals into motor driving control information, the motor driving control information is transmitted to the stepping motor through the socket, and the stepping motor performs corresponding moving operation according to the motor driving control information.

The image transmission module inputs HSD high-speed signals FPD-LINK through an FPD-LINK socket, the FPD-LINK signals are processed through a deserializer DS90UB928IC chip of the image transmission module, I2C0 signals are processed and output to DLP or LVDS signals are processed and output to a TFT screen, a backlight light source is combined by the DLP or the TFT screen, and ultra-high-definition continuous images are projected onto automobile windshields through optical lenses and a diffusion sheet optical component carrier.

The invention relates to an optical display hardware control platform, which has the following beneficial effects:

1. the image transmission control function is remarkably improved, an HSD high-speed signal FPD-LINK is input by a host of vehicle-mounted multimedia of an automobile, the high-speed signal FPD-LINK is processed by a deserializing IC chip of an image transmission module, I2C0 and LVD signals are processed and output and are conducted to a light source module circuit, then ultra-high-definition continuous images are projected onto the whole automobile windshield through structures such as an optical lens, an LED lamp, a diffusion sheet and the like and optical component carriers, the visual capability of the HUD is greatly improved through seamless fusion with other augmented reality technologies, and the wide-angle visual field and the effect of VID 15-15 m-infinity are provided;

2. power isolation is carried out, the PSRR power supply voltage noise suppression coefficient of a power supply is improved, and filtering is designed by adopting 4 parallel capacitors at a socket end, so that interference signals are prevented, and the precision of pulse signals is ensured;

3. the image transmission adopts a differential signal transmission mode, so that the mutual interference of finished automobile signals of the product is avoided, the common-mode inductor is added on a differential signal line, and the outward emission interference of a system is inhibited;

4. a digital ambient light sensor control module is additionally arranged, and the brightness of the HUD is adjusted according to the intensity of sunlight by designing an ambient light sensor and a related circuit, so that a good effect is brought to the comfort level and the experience feeling of a driver;

5. the main control module is additionally provided with the ESD electrostatic protection tube, because optical parts of the ESD electrostatic protection tube are relatively precise and the requirement on the quality of an optical display image is high, the electrostatic pulse influence of an optical display platform can be eliminated, and particularly for a network module or an MCU master control module, the signal stability and the definition are obviously improved.

Drawings

FIG. 1 is a block diagram of a control module of an optical display hardware control platform according to the present invention;

FIG. 2 is a circuit diagram of a host input circuit of an optical display hardware control platform according to the present invention;

FIG. 3 is a circuit diagram of an L-shaped filter circuit of an optical display hardware control platform according to the present invention;

FIG. 4 is a tree diagram of a power supply circuit system of an optical display hardware control platform according to the present invention;

FIG. 5 is a switch circuit diagram of a power supply circuit system of an optical display hardware control platform according to the present invention;

FIG. 6 is a circuit diagram of a LDO 12V to 5V power supply circuit of the power supply circuit system of the optical display hardware control platform according to the present invention;

FIG. 7 is a circuit diagram of a LDO 12V to 3.3V power supply circuit of the power supply circuit system of the optical display hardware control platform according to the present invention;

FIG. 8 is a circuit diagram of a DC-DC 12V to 3.3V power supply circuit of the power supply circuit system of the optical display hardware control platform according to the present invention;

FIG. 9 is a main circuit diagram of an MCU module of an optical display hardware control platform according to the present invention;

FIG. 10 is a DEBUG port circuit diagram of the MCU module of the optical display hardware control platform according to the present invention;

FIG. 11 is a circuit diagram of a reserved I/O port of an MCU module of an optical display hardware control platform according to the present invention;

FIG. 12 is a circuit diagram of an EEPROM memory of the MCU module of the optical display hardware control platform according to the present invention;

FIG. 13 is a circuit diagram of an ESD protection tube disposed in a reserved serial port of an MCU module of an optical display hardware control platform according to the present invention;

FIG. 14 is a RESET RESET circuit diagram of the MCU module of the optical display hardware control platform according to the present invention;

FIG. 15 is a POWER supply circuit diagram of the MCU module of the optical display hardware control platform according to the present invention;

FIG. 16 is a schematic diagram of an OSC crystal oscillator of the MCU module of the optical display hardware control platform according to the present invention;

FIG. 17 is a main circuit diagram of a photosensor circuit of an optical display hardware control platform according to the present invention;

FIG. 18 is a circuit diagram of an electrostatic discharge protection tube of the photosensor circuit of the optical display hardware control platform according to the present invention;

FIG. 19 is a circuit diagram of the power input port ALS3.3V of the photosensor circuit of the optical display hardware control platform according to the present invention;

FIG. 20 is a CAN circuit diagram of an optical display hardware control platform according to the present invention;

FIG. 21 is a diagram of input/output interfaces of a CAN circuit of an optical display hardware control platform according to the present invention;

FIG. 22 is a diagram showing the arrangement of the common mode inductor of the CAN circuit of the optical display hardware control platform according to the present invention;

FIG. 23 is a circuit diagram of a triode switch connected to a CAN circuit of an optical display hardware control platform according to the present invention;

FIG. 24 is a LINK circuit diagram of an optical display hardware control platform according to the present invention;

FIG. 25 is a main circuit diagram of a motor driving circuit of an optical display hardware control platform according to the present invention;

FIG. 26 is a circuit diagram of the MOTOR12V power interface terminal and the MOTOR 3.3V power interface terminal of the MOTOR driving circuit of the optical display hardware control platform according to the present invention;

FIG. 27 is a main circuit diagram of an image transmission module of an optical display hardware control platform according to the present invention;

FIG. 28 is a circuit diagram of the FPD-LINK socket end of the image transmission module of the optical display hardware control platform according to the present invention;

FIG. 29 is a main circuit diagram of a backlight source circuit of an optical display hardware control platform according to the present invention.

Detailed Description

The invention is further illustrated by the following examples:

example (b):

as shown in fig. 1 to 29, the optical display hardware control platform of the present invention is a main control PCB board, the main control PCB board is provided with an integral electronic circuit control system of the AR-HUD, the main control PCB board is composed of electronic circuit components and IC chips, and forms each standardized control module of the optical display, so that the AR-HUD can operate efficiently and accurately;

the signal input module of the host input circuit comprises a CAN-H interface, a CAN-L interface, a LIN interface, an IGN1+ interface and an ADC-KEY interface, the signal input module also comprises pins of an IIC host socket which are respectively connected with the CAN-H interface, the CAN-L interface, the LIN interface, the IGN1+ interface and the ADC-KEY interface, the CAN-H interface and the CAN-L interface are used for inputting CAN signals, the CAN signals adopt a differential signal transmission mode to avoid mutual interference between the product and finished automobile signals, two differential signal lines are provided with common mode inductors LC1 (DLW 43SH510XK2/51UH/230 mA) for inhibiting the interference emitted by a system, the differential signal transmission is a signal transmission technology and is different from the traditional method of one signal line and one ground line, the differential signal transmission transmits signals on the two signal lines, the amplitude of the two signals is equal, the phase is opposite, compared with a single-ended signal, the differential signal has strong anti-interference capability, the common-mode inductor is a two-way filter, on one hand, common-mode electromagnetic interference on a signal line is filtered, on the other hand, the common-mode inductor also inhibits the common-mode electromagnetic interference from emitting electromagnetic interference outwards, and the influence on the normal work of other electronic equipment in the same electromagnetic environment is avoided; an ESD electrostatic protection tube ESD4, an ESD1, an ESD11, an ESD2 and an ESD3 are respectively arranged on signal lines connected with the CAN-H interface, the CAN-L interface, the LIN interface, the IGN1+ interface and the ADC-KEY interface and the IIC host socket and used for improving the electrostatic protection capability of the system;

the L-shaped filter circuit of the host input circuit consists of a plurality of capacitors C1-C11 connected in parallel and an inductor L1 (47 uH/4A) to form the L-shaped filter circuit and is used for improving the anti-jamming capability of a system, the capacitors connected in parallel adopt capacitor combinations with different frequencies and are used for filtering noise in different frequency bands, the L-shaped filter circuit is also used as an electric resonator, stores the energy of oscillation when the circuit resonates, is used for generating signals with specific frequencies and is also used for separating the signals with the specific frequencies from more complex signals; the input end of the L-shaped filter circuit is connected with a clamping diode D2 (Z5W 27 VJ) in parallel, the clamping diode is a TVS diode and is used for improving the anti-surge and transient conducted interference capability of a system and ensuring the stable operation of the system, the TVS diode is a diode-type high-efficiency protection device, when two poles of the TVS diode are impacted by reverse transient high energy, the TVS diode can change the high impedance between the two poles into low impedance at the speed of 10-12 seconds, absorb the surge power of thousands of watts and clamp the voltage between the two poles at a preset value, thereby effectively protecting precise components in an electronic circuit from being damaged by various surge pulses; the input end of the L-shaped filter circuit is also connected with an anti-reverse diode D1 (SBR 1045 CTLQ-13) in series for polarity protection in the circuit;

the power supply circuit system comprises a switch circuit, a LDO 12V-to-3.3V power supply circuit, a LDO 12V-to-5V power supply circuit, a DC-DC 12V-to-3.3V power supply circuit, a DC-DC 12V-to-26V power supply circuit and a MOTOR DRIVER power supply circuit; the switch circuit is arranged at the input end of the power supply circuit system, the switch circuit is accessed by a 12V interface, the switch circuit adopts a B + interface as an output end, the switch circuit is provided with an MOS (metal oxide semiconductor) tube, a triode and a plurality of resistors, the MOS tube is a voltage-controlled element, the MOS tube is conducted by the voltage required by the voltage-controlled element, the voltage drop of a conducting junction is minimum, so that the switch function is realized, a plurality of input pins of the MOS tube are respectively connected with the 12V interface, a plurality of output pins of the MOS tube are respectively connected with a 1B + interface, the base terminal of the triode is accessed to one output pin of the MOS tube, the MOS tube is a field effect tube, the current can be controlled by utilizing the electric field effect, the impact of a vehicle power supply source on each circuit unit can be effectively protected, and each component can not be damaged or interfered, the triode is an NPN tube, when the level is high, the triode is switched on when in the on state, and is switched off when in the off state when in low level, and the triode switch is controlled by software codes, so that the device is convenient and fast; the output end of the LDO 12V-to-3.3V power supply circuit is respectively connected with the RST interface, the ROM interface and the MCU3.3 interface and is respectively used for reset power supply, storage power supply and MCU power supply, the LDO 12V to 3.3V power supply circuit is connected through a B + interface, the output end of the LDO 12V to 5V power supply circuit is connected with a CAN-5V interface, used for CAN power supply, the LDO 12V to 5V power supply circuit is connected through a B + interface, the output end of the DC-DC 12V to 3.3V power supply circuit is respectively connected with an ALS interface, a DES interface and an LCD interface, the output end of the DC-DC 12V-to-26V power supply circuit is connected with an LED interface, the ALS interface, the DES interface, the LCD interface and the LED interface are respectively used for photosensitive sensor power supply, deserializer power supply, LCD power supply and LED power supply, and the input end of the power supply circuit system is also connected with the LIN interface and the DLP interface;

in the power supply circuit system, the LDO power supply circuit for converting 12V into 3.3V and the LDO power supply circuit for converting 12V into 5V adopt an LDO power management chip, the LDO 12V to 3.3V power supply circuit adopts an LDO _ TPS7A6933QDRQ1 chip, the LDO 12V to 5V power supply circuit adopts an LDO _ TPS7B8150QDRVRQ1 chip, the LDO chip has good voltage reduction and voltage stabilization effects, because the vehicle supply voltage is unstable, the voltage reduction and stabilization management needs to be carried out through the power supply IC chip, and within the safe input range of the LDO chip, the output change of the LDO chip is very small, thereby ensuring stable output, the LDO chip can perform power isolation, improve PSRR of the power supply, the output signal is little influenced by the power supply, after passing through the LDO chip circuit, useless conversion signals are filtered out for the most part, and the passing signals are mainly useful direct current signals, meanwhile, the LDO chip has low cost, low power consumption and low power and is beneficial to the transmission of CAN signals; the DC-DC 12V to 3.3V power supply circuit and the DC-DC 12V to 26V power supply circuit adopt DC _ DC power supply management chips, the DC-DC 12V to 3.3V power supply circuit adopts a DCDC _ TPS54240 chip, the DC _ DC power supply management chips have high power, can pass through large current without damage, can convert direct current high voltage into direct current low voltage, and can ensure constant low voltage, the DC _ DC power supply management chips comprise input and output isolation, maximum current limitation, output short circuit protection, input reverse connection protection, overcurrent protection and over-temperature protection, the over-temperature protection comprises that the output is closed when the internal temperature exceeds 85 ℃, and the operation is recovered when the internal temperature is lower than 80 ℃; the MCU power supply adopts independent power management circuit for guaranteeing stable voltage and power of MCU, and MCU adopts ordinary electricity 3.3V, guarantees the quick, high-efficient switching of system dormancy/awakening state, and the LDO _ TPS7A6933QDRQ1 who adopts is the power IC of low IQ, can reduce system quiescent current, the MCU power supply includes B + car power input port, and B + car power input port normal operating voltage is 9V-12V, and when being less than 8V, MCU is in the dormancy state, is favorable to reducing car storage battery energy consumption and reduces the risk of car storage battery feed. Further, the power supply circuit system adopts the input of the maximum estimated current high voltage of 1.2A or low voltage of 3.5A; further, the LDO and the DC _ DC of the power management chip are wide-voltage vehicle-scale power IC of TI brand; further, the quiescent current of the MCU power supply circuit is as low as 2 milliamperes;

furthermore, in the MCU module, the OSC circuit is matched with a pll circuit to provide a clock frequency required by the system, and if different subsystems require clock signals with different frequencies, the clock frequency can be provided by different pll circuits connected to the same OSC circuit; furthermore, 10K level pull-up resistors R57, R58, R59, R60 and R61 are respectively arranged between the JTAG-TDO, JTAG-TDI, RST-MCU, JTAG-TMS and JTAG-TCLK pins and the power line and are used for level pull-up; furthermore, the DEBUG debugging port circuit comprises a debugging port socket, and anti-interference resistors R51, R52, R53, R54 and R55 are respectively arranged between the JTAG-TDO, JTAG-TDI, RST-MCU, JTAG-TMS and JTAG-TCLK pins and the debugging port socket and are used for inhibiting interference of spike signals brought by the socket; further, the MCU-3.3V, VDD and VDDA interface lines are respectively provided with decoupling capacitors C56, C57, C58, C59, C60 and C61, the decoupling capacitors are ceramic chip capacitors, and the ceramic chip capacitors have low electrostatic loss ESL and high-frequency impedance and are used for enhancing the stability of the POWER POWER supply circuit;

further, the photosensitive sensor circuit further comprises a power input interface ALS3.3V, and a magnetic bead is further arranged between the power input interface ALS3.3V and the power supply circuit for converting DC-DC 12V into 3.3V, so that the photosensitive sensor circuit is used for inhibiting high-frequency noise and spike interference on a signal line and a power line and has the capability of absorbing electrostatic pulses; the photosensitive sensor circuit is 3.3V in voltage, the current of the photosensitive sensor circuit is less than 2 milliamperes, the DC _ DC power supply management chip is high in power and can pass through large current without being damaged, direct current high voltage can be converted into direct current low voltage, constant low voltage can be guaranteed, the DC _ DC power supply management chip comprises input and output isolation, maximum current limitation, output short-circuit protection, input reverse connection protection, overcurrent protection and over-temperature protection, the over-temperature protection comprises that the output is closed when the internal temperature exceeds 85 ℃, and the work is recovered when the internal temperature is lower than 80 ℃; furthermore, the photosensitive sensor circuit adopts 5 pins of an IIC socket as input ends, the OPT3001 photosensitive chip is provided with six pins, and the AADR pin line is provided with two resistors R8 and R9 which are connected in parallel and used for signal selection; furthermore, electrostatic protection tubes ESD1, ESD2 and ESD3 are respectively arranged between the SDA pin line, the INT pin line, the SCL pin line and the IIC socket and used for avoiding electrostatic influence caused by the socket and improving the electrostatic protection capability of the system; further, level pull-up resistors R5, R6 and R7 are respectively arranged between the SDA pin line, the INT pin line and the SCL pin line and the power input interface ALS3.3V, and are used for level pull-up, improving the noise margin of the signal of the DC _ DC chip and enhancing the anti-interference capability, wherein the level pull-up resistor is a 10K resistor, and has low power consumption and less heat generation; furthermore, 33 ohm anti-interference resistors R2, R3 and R4 are respectively connected in series between the SDA pin line, the INT pin line and the SCL pin line and the IIC socket and are used for inhibiting interference of spike signals brought by the socket;

further, in the CAN circuit and the LINK circuit, the TJA1043T chip further includes a differential signal input pin CAN-H, CAN-L for connecting a host socket to input a differential signal, the CAN-H pin line, the CAN-L pin line, the CAN3.3V power input line, and the CAN5V power input line are respectively provided with a common mode inductor, the common mode inductor of the CAN5V power input line is FB 3120R/800 mA, the common mode inductor of the CAN3.3V power input line is FB 20120R/800 mA, the common mode inductor is a series-connected magnetic bead, the common mode inductor is a bidirectional filter, on one hand, common mode electromagnetic interference on the signal line is filtered, on the other hand, the common mode inductor is suppressed from emitting electromagnetic interference outwards, and normal operation of other electronic devices under the same electromagnetic environment is prevented from being affected; the LINK circuit adopts a TJA1027T/20 chip, is used for a serial communication network, and is based on a main node and a plurality of LINK slave nodes, wherein the number of the slave nodes is 16 at most; the circuit comprises a LINK circuit, a TVS clamping diode Z5W27VJ, a TVS clamping diode which is a diode-type high-efficiency protection device and is connected with an L-type filter circuit through a B + interface, wherein when two poles of the TVS clamping diode are impacted by reverse transient high energy, the TVS clamping diode can change high impedance between the two poles into low impedance at the speed of 10-12 seconds, absorb surge power of thousands of watts, clamp the voltage between the two poles at a preset value, and effectively protect precise components in an electronic circuit from being damaged by various surge pulses; the TJA1027T/20 chip further comprises differential signal input pins LIN-RX and LIN-TX which are used for being connected with a host socket to input differential signals, a LIN-RX pin line, a LIN-TX pin line and a B + power supply input line are respectively provided with a common mode inductor, the common mode inductor of the B + power supply input line is FB 4120R/800 mA, the common mode inductor is a magnetic bead which is connected in series, the common mode inductor is a bidirectional filter, common mode electromagnetic interference on the signal line is filtered, electromagnetic interference which is not emitted outwards is restrained, and normal work of other electronic equipment under the same electromagnetic environment is prevented from being influenced; further, ESD electrostatic protection tubes are arranged at bus input or output ports of the CAN circuit and the LINK circuit, so that the electrostatic protection capability of the system is improved; further, the TJA1043T chip further comprises a CAN-INH pin, and the CAN-INH pin is connected to the triode switch circuit; further, the triode switching circuit adopts a triode MMBT3904-7-F, the triode MMBT3904-7-F is an NPN tube, when the control electrode level is high, the triode MMBT3904-7-F is in a switch-on state, when the control electrode level is low, the triode MMBT3904-7-F is in a switch-off state, and the triode switching circuit adopts software codes to control the CAN circuit, so that the device is convenient and fast;

further, in the MOTOR driving circuit, the MCU interface group includes a MOTOR-ENB, a MOTOR-FAULT, a MOTOR-SLEEP, a MOTOR-RST, a MOTOR-HOME, a MOTOR-delay, a MOTOR-DIR, a MOTOR-stem interface, and one end of the MOTOR-ENB, the MOTOR-FAULT, the MOTOR-SLEEP, the MOTOR-HOME, the MOTOR-default, the MOTOR-delay, the MOTOR-dependent, the MOTOR-default, the MOTOR-delay, the MOTOR-DIR, and the MOTOR-stem interface is respectively connected to NENBL, nflt, NSLEEP, NRESET, NHOME, the delay, DIR, and the MCU module, and the other end is connected to the MCU module for input and output between DRV8824QPWPRQ1 and the MCU module; the motor driving chip further comprises PINs AOUT1, AOUT2, BOUT1 and BOUT2 at the output end, the PINs AOUT1, AOUT2, BOUT1 and BOUT2 are respectively connected into a 4PIN socket through signal lines, and the output end of the 4PIN socket is connected with a stepping motor; the 4PIN socket ends of the AOUT1 signal lines, the AOUT2 signal lines, the BOUT1 signal lines and the BOUT2 signal lines are respectively connected with a filter capacitor in parallel, and the filter capacitors are used for preventing interference signals and ensuring the precision of pulse signals; the 4PIN socket ends of the AOUT1, AOUT2, BOUT1 and BOUT2 signal lines are respectively connected with magnetic beads FB 6120R/800 mA, FB 7120R/800 mA, FB8120R/800mA and FB9120R/800mA in series, so that high-frequency noise and spike interference are prevented, the electromagnetic compatibility of a product is ensured, the magnetic beads have high resistivity and magnetic conductivity, the magnetic beads are equivalent to series connection of a resistor and an inductor, but the resistance value and the inductance value change along with the frequency; further, an L-like circuit is arranged between the power interface of the MOTOR12V and the MOTOR driving chip, and the L-like circuit comprises two C capacitors C49 (100 nF/50V), C51 (100 nF/50V) and an EC electrolytic capacitor EC5 (47 uF/35V) which are respectively connected in parallel; furthermore, a 10K resistor R68-R75 is respectively connected in series between the MOTOR 3.3V power interface and NENBL, NFAULT, NSLEEP, NRESET, NHOME, DECAY, DIR and STEP pins of the MOTOR driving chip, and is used for pulling up a level, stabilizing the potential of an output end and saving power consumption; further, 100 ohm resistors R32, R34, R35, R37, R38, R39, R40 and R41 are respectively connected in series between the MOTOR-ENB, the MOTOR-FAULT, the MOTOR-SLEEP, the MOTOR-RST, the MOTOR-HOME, the MOTOR-DECAY, the MOTOR-DIR of the MCU interface group, the NENBL, the NFAULT, the NSLEEP, the NRESET, the NHOME, the DECAY, the DIR and the STEP of the MOTOR-STEP interface and the MOTOR driving chip, and are used for noise suppression and signal accuracy guarantee; further, the step motor is a low-speed fine adjustment mechanism, the step motor adopts a bipolar step motor, and the bipolar step motor adopts 20 steps to carry out a step node;

the image transmission module comprises an FPD-LINK socket, a deserializer, a light source for generating an image and a backlight light source circuit for generating a backlight light source; the FPD-LINK socket inputs HSD high-speed signals FPD-LINK, the deserializer adopts a DS90UB928 chip, an input pin of the DS90UB928 chip is connected to an output end of the FPD-LINK socket, and an output pin of the DS90UB928 chip is connected with a light source; the light source provides three modes of DLP, TFT2.6 inches and TFT4.1 inches, the light source comprises a DLP image processing unit and a TFT screen, when the light source is in the DLP mode, the DS90UB928 chip of the deserializer processes and outputs an I2C0 signal to the DLP image processing unit by using a protocol of I2C0, and when the light source is in the TFT2.6 inches and TFT4.1 inches, the DS90UB928 chip of the deserializer conducts an image signal to the TFT screen by using an LVDS protocol; the FPD-LINK adopts differential signal input, the FPD-LINK socket is connected with IN + and IN-pins, the IN + and IN-pins are respectively connected with a differential signal wire as the input of the FPD-LINK socket, and the two differential signal wires are provided with a common-mode inductor and used for inhibiting the system from transmitting and interfering outwards; an 2/3/5/6/7/8/10 input or output port of the FPD-LINK socket is provided with an ESD (electro-static discharge) electrostatic protection tube for improving the electrostatic protection capability of the system; pins of the deserializer DS90UB928IC chip connected with the TFT screen comprise a clock signal line pin CLK +, CLK-, and a common mode inductor LC3 is arranged at the output end of the clock signal line pin CLK +, CLK-, and is used for providing clock signals, the clock signals are used for playing a role of a timer in a synchronous circuit and ensuring that related electronic components can synchronously operate, the common mode inductor is a two-way filter, on one hand, common mode electromagnetic interference on a signal line is filtered, on the other hand, electromagnetic interference which is not emitted outwards is inhibited, normal operation of other electronic equipment under the same electromagnetic environment is avoided being influenced, the frequency of the clock signals is ensured to be high, and meanwhile, the precision is also high;

further, the backlight source circuit is used for forming a backlight signal of optical display and forming image display with an image output signal, the backlight source circuit comprises a magnetic bead arranged at an input end, a filter capacitor group, a backlight driving chip IC _ TPS61194PWPRQ1 and a BOOST voltage boosting circuit, the filter capacitor group comprises three capacitors C85 (10 uF/50V), C86 (10 uF/50V) and C88 (100 uF/50V) which are arranged in parallel, the backlight driving chip IC _ 61194PWPRQ1 comprises a plurality of TPS pins, the backlight source circuit adopts 12V switching power supply input, converts the switching power supply input into BL _12V through the magnetic bead, then filters through the filter capacitor group, the BL _12V supplies power to a SW pin of the backlight driving chip IC _ TPS61194 PWQ 1, so that the filtered current is connected to the input pin of the backlight driving chip, and the pin of the backlight driving chip is also connected with the BOOST voltage boosting circuit, BL _12V is converted into 24V-28V output current through a backlight driving chip and a BOOST booster circuit, and the output end of the backlight light source circuit is an LED + interface; the backlight driving chip IC _ TPS61194PWPRQ1 is an automobile high-efficiency LED driver integrated with a DC-DC converter, the backlight driving chip IC _ TPS61194PWPRQ1 is low electromagnetic interference EMI and easy to use driver, the backlight driving chip IC _ TPS61194PWPRQ1 comprises four combined high-precision current traps which can meet the requirement of 200-600 milliamperes of the backlight light source circuit, the DC-DC converter can provide adaptive output voltage control based on LED current sink headroom voltage, can regulate the voltage to the minimum level that can meet the needs under all conditions, thereby reducing the power consumption to the maximum extent, reducing the quiescent current of the whole machine, the DC-DC converter supports the spread spectrum aiming at the switching frequency and realizes the external synchronization by using a special pin, the adjustable frequency range of the DC-DC converter is large, so that the backlight driving chip IC _ TPS61194PWPRQ1 can avoid amplitude modulation radio frequency band interference; the backlight driving circuit is arranged on a backlight source PCB, the backlight source circuit is connected in by a socket, 8 LEDs are arranged on the backlight source PCB, an LED + interface is electrically connected with the 8 LEDs, a pin of the backlight driving chip IC _ TPS61194PWPRQ1 is also connected with two serially connected variable resistors, the magnitude of output current of the backlight source circuit is set by adjusting or replacing the two variable resistors, so that the output current is constantly output, and the backlight driving chip IC _ TPS61194PWPRQ1 further comprises an MOS (metal oxide semiconductor) tube for switching function;

further, in the backlight light source circuit, the BOOST voltage BOOST circuit is provided with an inductor L4, a diode D7 and a parallel capacitor bank C90-C92 which are connected in series, when a SW pin of the backlight driving chip IC _ TPS61194PWPRQ1 is conducted with a GND pin, the inductor L4 is in a charging state, the diode D7 is blocked reversely, the inductor L4 is charged and stores energy completely, the BOOST voltage BOOST circuit feeds back a signal to the backlight driving chip IC through a resistor, the backlight driving chip IC instructs to close the inductor L4 to charge, the inductor L4 starts to charge the parallel capacitor bank through the diode D7, the voltage at two ends of the parallel capacitor bank is increased, and when the voltage at two ends of the parallel capacitor bank is higher than the input voltage, the voltage boosting is completed; furthermore, a plurality of feedback resistors R155-R157 are arranged at two ends of the diode D7 and used for feeding back charge and discharge signals or adjusting the width of pulses or adjusting the charge and discharge time; further, the DC-DC converter supports boost and SEPIC modes of operation.

The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Claims

1. The utility model provides an optical display hardware control platform, optical display hardware control platform is a master control PCB board, the master control PCB board is provided with AR-HUD's holistic electronic circuit control system, the master control PCB board comprises electronic circuit components and parts and IC chip to constitute each standardized control module of optical display, its characterized in that:

the power supply circuit system comprises a switch circuit, a LDO 12V-to-3.3V power supply circuit, a LDO 12V-to-5V power supply circuit, a DC-DC 12V-to-3.3V power supply circuit, a DC-DC 12V-to-26V power supply circuit and a MOTOR DRIVER power supply circuit; the switch circuit is arranged at the input end of the power supply circuit system and is accessed by adopting a 12V interface, the switch circuit adopts a B + interface as an output end, the switch circuit is provided with an MOS tube, a triode and a plurality of resistors, the MOS transistor is a voltage-controlled element, and is conducted by the voltage required by the voltage-controlled element, the voltage drop of the conducting junction is minimum, thereby realizing the switching function, a plurality of input pins of the MOS tube are respectively connected with the 12V interface, a plurality of output pins of the MOS tube are respectively connected with the 1B + interface, the base terminal of the triode is connected with one output pin of the MOS tube, the MOS tube is a field effect tube, the triode is an NPN tube, when the level is high, the triode is switched on and switched off, and when the level is low, the triode is switched off, and the triode switch is controlled by software codes, so that convenience and convenience are realized; the output end of the LDO 12V-to-3.3V power supply circuit is respectively connected with the RST interface, the ROM interface and the MCU3.3 interface and is respectively used for reset power supply, storage power supply and MCU power supply, the LDO 12V to 3.3V power supply circuit is connected through a B + interface, the output end of the LDO 12V to 5V power supply circuit is connected with a CAN-5V interface, used for CAN power supply, the LDO 12V to 5V power supply circuit is connected through a B + interface, the output end of the DC-DC 12V to 3.3V power supply circuit is respectively connected with an ALS interface, a DES interface and an LCD interface, the output end of the DC-DC 12V-to-26V power supply circuit is connected with an LED interface, the ALS interface, the DES interface, the LCD interface and the LED interface are respectively used for photosensitive sensor power supply, deserializer power supply, LCD power supply and LED power supply, and the input end of the power supply circuit system is also connected with the LIN interface and the DLP interface;

the MCU module adopts an MCU singlechip for system control of an optical display hardware control platform, the MCU singlechip adopts an IC-S32K142 chip, the quiescent current of the MCU singlechip is less than 2 milliamperes, the MCU singlechip at least comprises motor drive control, reset control, debugging port control, LCD backlight control, CAN communication control, deserializer communication control, reserved I/O port control, reserved serial port control and EEPROM memory control, and the IC-S32K142 chip is 64 pins;

the CAN circuit and the LINK circuit are network circuit structures of an optical display hardware control platform, the CAN circuit is a controller area network circuit, and the LINK circuit is a serial communication network circuit; the CAN circuit adopts a TJA1043T chip, pins of the TJA1043T chip comprise a VIO input and an SPLIT voltage output, the pins of the TJA1043T chip are respectively connected into CAN3.3V and CAN5V and CAN be directly connected with 3.3V and 5V input power supplies, the SPLIT voltage output is used for stabilizing the level of a recessive bus, and the node diagnosis and fault containment listen-only mode of the TJA1043T chip adopts SO14 and HVSON14 packaging, SO that the chip has an improved automatic optical inspection AOI function, and the HVSON14 packaging adopts a 3.0 mm 4.5 mm specification; the TJA1043T chip is a high-speed CAN transceiver and provides an interface between a controller area network CAN protocol controller and a physical dual-line CAN bus; the signal transmission of the CAN circuit and the LINK circuit adopts a differential transmission mode;

the image transmission module comprises an FPD-LINK socket, a deserializer, a light source for generating an image and a backlight light source circuit for generating a backlight light source; the FPD-LINK socket inputs HSD high-speed signals FPD-LINK, the deserializer adopts a DS90UB928 chip, an input pin of the DS90UB928 chip is connected to an output end of the FPD-LINK socket, and an output pin of the DS90UB928 chip is connected with a light source; the light source provides three modes of DLP, TFT2.6 inches and TFT4.1 inches, the light source comprises a DLP image processing unit and a TFT screen, when the light source is in the DLP mode, the DS90UB928 chip of the deserializer processes and outputs an I2C0 signal to the DLP image processing unit by using a protocol of I2C0, and when the light source is in the TFT2.6 inches and TFT4.1 inches, the DS90UB928 chip of the deserializer conducts an image signal to the TFT screen by using an LVDS protocol; the FPD-LINK adopts differential signal input, the FPD-LINK socket is connected with IN + and IN-pins, the IN + and IN-pins are respectively connected with a differential signal wire as the input of the FPD-LINK socket, and the two differential signal wires are provided with a common-mode inductor and used for inhibiting the system from transmitting and interfering outwards; an 2/3/5/6/7/8/10 input or output port of the FPD-LINK socket is provided with an ESD (electro-static discharge) electrostatic protection tube for improving the electrostatic protection capability of the system; pins of the deserializer DS90UB928IC chip connected with the TFT screen comprise clock signal line pins CLK +, CLK-, the output ends of the clock signal line pins CLK +, CLK-are provided with common-mode inductors, and the clock signal line pins CLK +, CLK-are used for providing clock signals.

2. The optical display hardware control platform of claim 1, wherein the signal input module of the host input circuit comprises a CAN-H interface, a CAN-L interface, an LIN interface, an IGN1+ interface, and an ADC-KEY interface, and further comprises pins of an IIC host socket respectively connected to the CAN-H interface, the CAN-L interface, the LIN interface, an IGN1+ interface, and the ADC-KEY interface, wherein the CAN-H interface and the CAN-L interface are used for inputting CAN signals, the CAN signals are transmitted in a differential signal manner to avoid mutual interference between the product and vehicle signals, and the two differential signal lines are provided with a common mode inductor for suppressing the system from emitting interference to the outside; ESD (electro-static discharge) electrostatic protection tubes are respectively arranged on signal lines connected with the CAN-H interface, the CAN-L interface, the LIN interface, the IGN1+ interface and the ADC-KEY interface and the IIC host socket and are used for improving the electrostatic protection capability of the system;

the L-shaped filter circuit of the host input circuit consists of a plurality of capacitors and an inductor which are connected in parallel, and is used for improving the anti-interference capability of the system; the input end of the L-shaped filter circuit is connected with a clamping diode in parallel, and the clamping diode is a TVS diode; and the input end of the L-shaped filter circuit is also connected with an anti-reverse diode in series and used for polarity protection in the circuit.

3. The optical display hardware control platform of claim 1, wherein in the power supply circuitry, the LDO 12V to 3.3V power supply circuit and the LDO 12V to 5V power supply circuit employ LDO power management chips, the LDO 12V to 3.3V power supply circuit employs LDO _ TPS7a6933QDRQ1 chips, and the LDO 12V to 5V power supply circuit employs LDO _ TPS7B8150QDRVRQ1 chips; the DC-DC 12V to 3.3V power supply circuit and the DC-DC 12V to 26V power supply circuit adopt a DC _ DC power management chip, and the DC-DC 12V to 3.3V power supply circuit adopts a DCDC _ TPS54240 chip; the MCU adopts an independent power management circuit for supplying power, the MCU is used for ensuring stable voltage and power of the MCU, the MCU adopts 3.3V of normal power and ensures the rapid and efficient switching of a sleeping/awakening state of a system, the adopted LDO _ TPS7A6933QDRQ1 is a low-IQ power IC, the quiescent current of the system can be reduced, the MCU comprises a B + vehicle power supply input port, the normal working voltage of the B + vehicle power supply input port is 9V-12V, and when the working voltage is lower than 8V, the MCU is in a sleeping state, so that the energy consumption of a vehicle storage battery and the risk of feeding the vehicle storage battery are reduced; the power supply circuit system adopts the input of the maximum estimated current high voltage of 1.2A or low voltage of 3.5A; and the quiescent current of the MCU power supply circuit is as low as 2 milliamperes.

4. The optical display hardware control platform of claim 1, wherein in the MCU module, the IC-S32K142 chip uses pins of MOTOR-RST, MOTOR-SLEEP, MOTOR-FAULT, MOTOR-delay, MOTOR-DIR, MOTOR-ENB, MOTOR-STEP, and MOTOR-HOME as input/output interfaces for MOTOR drive control, and performs MOTOR drive control; the MCU singlechip further comprises an EEPROM (electrically erasable programmable read-only memory), the EEPROM adopts an N24C02UVTG chip, the IC-S32K142 chip is connected with the N24C02UVTG chip through SCL and SDA pins and used for realizing the control of the EEPROM memory of the MCU singlechip, a decoupling capacitor of 100nF/50V is arranged in the N24C02UVTG chip circuit and is connected between a power line VDD and a ground wire of the N24C02UVTG chip circuit, and the decoupling capacitor is used for enhancing the stability of the N24C02UVTG chip because the N24C02UVTG chip has weak anti-interference capability and large current change when being turned off; the MCU single chip microcomputer further comprises a plurality of reserved I/O ports, the reserved I/O ports are respectively connected to the IC-S32K142 chip through PTE4, PTE5, PTE9, PTE10, PTE11, PTD0, PTD1 and PTD15 to achieve reserved I/O port control of the MCU single chip microcomputer, the MCU module is further connected to a limit sensor, and the reserved I/O ports and the limit sensor structure are used for improving the universality and interchangeability of the platform; the MCU singlechip also comprises a reserved serial port which is connected into the IC-S32K142 chip through UART0-RX and UART0-TX pins, and ESD electrostatic protection tubes are respectively connected to the UART0-RX and UART0-TX pin circuits for avoiding electrostatic influence caused by the serial port and improving the electrostatic protection capability of the system; the MCU singlechip also comprises an OSC crystal oscillator circuit which adopts a crystal oscillator 8M/3225 and is used for providing a basic clock signal for a system, and the OSC crystal oscillator circuit is connected to the IC-S32K142 chip through XTAL and EXTAL pins; the MCU singlechip also comprises a RESET RESET circuit, the RESET RESET circuit adopts an IC-TPS3823-SOT-23-5-AA RESET chip, the RESET RESET circuit is connected into the IC-S32K142 chip through an RST-MCU pin and is used for realizing RESET control of the MCU singlechip, a pin circuit of the IC-TPS3823-SOT-23-5-AA RESET chip is provided with a decoupling capacitor, the decoupling capacitor is a ceramic chip capacitor, and the ceramic chip capacitor has low electrostatic loss ESL and high-frequency impedance and is used for enhancing the stability of the IC-TPS3823-SOT-23-5-AA RESET chip; the MCU singlechip also comprises a DEBUG debugging port circuit which is connected with the IC-S32K142 chip through JTAG-TDO, JTAG-TDI, RST-MCU, JTAG-TMS and JTAG-TCLK pins and is used for realizing the debugging port control of the MCU singlechip; the MCU single chip microcomputer further comprises a POWER POWER supply circuit, the POWER POWER supply circuit comprises MCU-3.3V, VDD and VDDA interfaces, the VDD and VDDA interfaces are respectively connected to the IC-S32K142 chip, the optical display hardware control platform further comprises a POWER supply circuit for converting LDO 12V into 3.3V, and the MCU-3.3V interface is connected with the output end of the POWER supply circuit for converting LDO 12V into 3.3V and used for POWER supply input of the MCU single chip microcomputer; the IC-S32K142 chip adopts CAN-EN, INH-DET, CAN-TXD, CAN-RXD, CAN-5V-EN, CAN-ERR, CAN-WAKE and CAN-STB pins as input and output interfaces of CAN communication control, and CAN communication control is carried out;

the OSC crystal oscillator circuit is matched with the phase-locked loop circuit; a 10K level pull-up resistor is respectively arranged between the JTAG-TDO, JTAG-TDI, RST-MCU, JTAG-TMS and JTAG-TCLK pins and the power line and is used for level pull-up; the DEBUG debugging port circuit comprises a debugging port socket, and anti-interference resistors are respectively arranged between the JTAG-TDO, JTAG-TDI, RST-MCU, JTAG-TMS and JTAG-TCLK pins and the debugging port socket and are used for inhibiting interference of spike signals brought by the socket; the MCU-3.3V, VDD and VDDA interface lines are respectively provided with a decoupling capacitor, the decoupling capacitors are ceramic chip capacitors, and the ceramic chip capacitors have low electrostatic loss ESL and high-frequency impedance and are used for enhancing the stability of the POWER POWER supply circuit.

5. The optical display hardware control platform of claim 1, wherein the photosensor circuit further comprises a power input interface ALS3.3V, and a magnetic bead is disposed between the power input interface ALS3.3V and the DC-DC 12V to 3.3V power supply circuit for suppressing high frequency noise and spike interference on the signal line and the power line and having an ability to absorb electrostatic pulses; the voltage of the photosensitive sensor circuit is 3.3V, and the current of the photosensitive sensor circuit is less than 2 mA; the photosensitive sensor circuit adopts 5 pins of an IIC socket as input ends, the OPT3001 photosensitive chip adopts six pins, and the AADR pin line is provided with two resistors connected in parallel for signal selection; electrostatic protection tubes are respectively arranged between the SDA pin line, the INT pin line, the SCL pin line and the IIC socket and are used for avoiding electrostatic influence caused by the socket and improving the electrostatic protection capability of the system; level pull-up resistors are respectively arranged between the SDA pin line, the INT pin line and the SCL pin line and the power input interface ALS3.3V and are used for level pull-up, noise tolerance of signals of the DC-DC chip is improved, anti-interference capability is enhanced, the level pull-up resistors are 10K resistors, power consumption is low, and heating is less; and a 33-ohm anti-interference resistor is respectively connected in series between the SDA pin line, the INT pin line, the SCL pin line and the IIC socket and is used for inhibiting the interference of spike signals brought by the socket.

6. The optical display hardware control platform of claim 1, wherein in the CAN circuit and the LINK circuit, the TJA1043T chip further comprises a differential signal input pin CAN-H, CAN-L for connecting a host socket to input differential signals, the CAN-H pin line, the CAN-L pin line, the CAN3.3V power input line, and the CAN5V power input line are respectively provided with a common-mode inductor, the common-mode inductor is a series-connected magnetic bead, and the common-mode inductor is a bi-directional filter; the LINK circuit adopts a TJA1027T/20 chip, is used for a serial communication network, and is based on a main node and a plurality of LINK slave nodes, wherein the number of the slave nodes is 16 at most; the LINK circuit is connected with an L-shaped filter circuit through a B + interface and used for power supply input of the LINK circuit, a TVS clamping diode is arranged between the LINK circuit and the L-shaped filter circuit, and the TVS clamping diode is a diode-shaped high-efficiency protection device; the TJA1027T/20 chip further comprises differential signal input pins LIN-RX and LIN-TX which are used for being connected with a host socket to input differential signals, a LIN-RX pin line, a LIN-TX pin line and a B + power supply input line are respectively provided with a common mode inductor, the common mode inductor is a magnetic bead which is connected in series, and the common mode inductor is a bidirectional filter; further, ESD electrostatic protection tubes are arranged at bus input or output ports of the CAN circuit and the LINK circuit, so that the electrostatic protection capability of the system is improved; the TJA1043T chip further comprises a CAN-INH pin, and the CAN-INH pin is connected to the triode switch circuit; the triode switch circuit adopts a triode MMBT3904-7-F, the triode MMBT3904-7-F is an NPN tube, and the triode switch circuit is controlled by software codes in the CAN circuit, so that the device is convenient and fast.

7. An optical display hardware control platform according to claim 1, wherein in the MOTOR driving circuit, the MCU interface group comprises a MOTOR-ENB, a MOTOR-FAULT, a MOTOR-SLEEP, a MOTOR-RST, a MOTOR-HOME, a MOTOR-decade, a MOTOR-DIR, a MOTOR-STEP interface, and the MOTOR-ENB, the MOTOR-FAULT, the MOTOR-SLEEP, the MOTOR-RST, the MOTOR-HOME, the MOTOR-ay, the MOTOR-DIR, the MOTOR-STEP interface has one end respectively connected to a NENBL, a NFAULT, a leep, an esnrnet, a NHOME, a MOTOR-DIR, a stem pin, and the other end connected to a MCU decoder module for input and output between a DRV8824 wpwprq 84 and a qpm pc module; the motor driving chip further comprises PINs AOUT1, AOUT2, BOUT1 and BOUT2 at the output end, the PINs AOUT1, AOUT2, BOUT1 and BOUT2 are respectively connected into a 4PIN socket through signal lines, and the output end of the 4PIN socket is connected with a stepping motor; the 4PIN socket ends of the AOUT1 signal lines, the AOUT2 signal lines, the BOUT1 signal lines and the BOUT2 signal lines are respectively connected with a filter capacitor in parallel, and the filter capacitors are used for preventing interference signals and ensuring the precision of pulse signals; the 4PIN socket ends of the AOUT1, AOUT2, BOUT1 and BOUT2 signal lines are respectively connected with a magnetic bead in series; an L-shaped circuit is arranged between the MOTOR12V power interface and the MOTOR driving chip, the L-shaped circuit comprises two C capacitors and an ECS electrolytic capacitor which are respectively connected in parallel, and the L-shaped circuit is a low-tube filter and can effectively isolate medium-high frequency noise caused by a 12V power supply end; a 10K resistor is respectively connected in series between the MOTOR 3.3V power interface and NENBL, NFAULT, NSLEEP, NRESET, NHOME, DECAY, DIR and STEP pins of the MOTOR driving chip, and is used for pulling up a level, stabilizing the potential of an output end and saving power consumption; furthermore, 100 ohm resistors are respectively connected in series between the MOTOR-ENB, the MOTOR-FAULT, the MOTOR-SLEEP, the MOTOR-RST, the MOTOR-HOME, the MOTOR-DECAY, the MOTOR-DIR, the MOTOR-STEP interface and pins NENBL, NFAULT, NSLEEP, NRESET, NHOME, DECAY, DIR and STEP of the MOTOR driving chip, and are used for noise suppression and signal precision guarantee; further, the step motor is a low-speed fine adjustment mechanism, the step motor adopts a bipolar step motor, and the bipolar step motor adopts 20 steps to carry out a step node.

8. The optical display hardware control platform of claim 1, wherein the image transmission module comprises a power input interface 3.3V, a power access pin VDD33 and a power access pin VDDIO, the power access pin VDD33 and the power access pin VDDIO are respectively connected with a DS90UB928IC chip of the deserializer, the power input interface 3.3V is connected with a DC-DC 12V to 3.3V power supply circuit, and then the DS90UB928IC chip is powered by the power access pin VDD33 and the power access pin VDDIO output, the backlight light source circuit comprises an LED, and the DC-DC 12V to 26V power supply circuit is connected with the LED; the power supply of the image transmission module inputs 12V current from a host, then the current is filtered by an L-shaped filter circuit, then the current is processed by a power management chip DC _ DC of a power supply circuit system, and then the current is respectively connected to chips of the image transmission module; the image transmission module is also accessed with a CAN/LIN bus signal, the CAN/LIN bus signal and a power supply are accessed with a chip of the MCU module through an 8PIN host socket, and the CAN/LIN bus signal is processed by the chip of the MCU module, then output through a PIN and transmitted to the deserializer, and then output to the light source through the deserializer for display; a magnetic bead is respectively arranged between the power input interface 3.3V of the image transmission module and the power access pin VDD33 and the power access pin VDDIO; and a plurality of decoupling capacitors are also connected in parallel on a 3.3V line of a power input interface of the image transmission module to play a decoupling role.

9. The optical display hardware control platform of claim 1, wherein the backlight source circuit is configured to form a backlight signal for optical display, and form an image display with an image output signal, the backlight source circuit includes a magnetic bead disposed at an input end, a filter capacitor bank, a backlight driver IC _ TPS61194PWPRQ1, and a BOOST circuit, the filter capacitor bank includes three capacitors disposed in parallel, the backlight driver IC _ TPS61194PWPRQ1 includes a plurality of pins, the backlight source circuit adopts a 12V switching power input, converts the input voltage from the magnetic bead to BL _12V, and then filters the input voltage through the filter capacitor bank, the BL _12V supplies power to the SW pin of the backlight driver IC _ TPS61194PWPRQ1, so that the filtered current is connected to the input pin of the backlight driver IC, and the BOOST circuit is further connected to the pin of the backlight driver IC, BL _12V is converted into 24V-28V output current through a backlight driving chip and a BOOST booster circuit, and the output end of the backlight light source circuit is an LED + interface; the backlight driving chip IC _ TPS61194PWPRQ1 is an automobile high-efficiency LED driver integrated with a DC-DC converter, the backlight driving chip IC _ TPS61194PWPRQ1 is a driver with low electromagnetic interference (EMI) and easy use, the backlight driving chip IC _ TPS61194PWPRQ1 comprises four high-precision current wells which can be combined, the requirement of the backlight light source circuit can be met, the DC-DC converter can provide self-adaptive output voltage control based on LED current well residual voltage, the DC-DC converter supports the spread of switching frequency and realizes external synchronization by using a special pin, the adjustable frequency range of the DC-DC converter is large, and the backlight driving chip IC _ TPS61194PWPRQ1 can avoid the interference of amplitude modulation radio frequency bands; the backlight driving circuit is arranged on a backlight source PCB, the backlight source circuit is connected in through a socket, 8 LEDs are arranged on the backlight source PCB, an LED + interface is electrically connected with the 8 LEDs, a pin of the backlight driving chip IC _ TPS61194PWPRQ1 is further connected with two serially connected variable resistors, the output current of the backlight source circuit is set through adjusting or replacing the two variable resistors, the output current is enabled to be output constantly, and the backlight driving chip IC _ TPS61194PWPRQ1 further comprises an MOS tube used for a switching function.

10. The optical display hardware control platform of claim 1, wherein the BOOST circuit of the backlight source circuit is provided with an inductor L4, a diode D7, and a parallel capacitor bank connected in series, when the SW pin of the backlight driver IC _ TPS61194PWPRQ1 is connected to the GND pin, the inductor L4 is in a charging state, the diode D7 is blocked in a reverse direction, the inductor L4 finishes charging and storing energy, the BOOST circuit feeds back a signal to the backlight driver IC through a resistor, the backlight driver IC instructs to turn off the inductor L4 to charge, the inductor L4 starts to charge the parallel capacitor bank through the diode D7, the voltage across the parallel capacitor bank rises, and when the voltage across the parallel capacitor bank is higher than the input voltage, the boosting is finished; furthermore, a plurality of feedback resistors are arranged at two ends of the diode D7 and used for feeding back charge and discharge signals or adjusting the pulse width or adjusting the charge and discharge time; the DC-DC converter supports boost and SEPIC modes of operation.