Vehicle-mounted DP signal conversion display device

Abstract

The utility model belongs to the field of DP signal display, and relates to a vehicle-mounted DP signal conversion display device which comprises a vehicle-mounted DP signal input socket, an MCU processing chip, a display screen backlight driving chip, a display screen backlight socket, a capacitive touch screen input socket, an MIPI signal output socket, an LVDS signal output socket and a DP signal conversion chip which are electrically connected. The vehicle-mounted DP signal input socket is used for receiving DP signals, the DP signal input socket is connected with the DP signal conversion chip, and the DP signal input socket transmits the received DP signals to the DP signal conversion chip for processing; and the MCU processing chip is connected with the DP signal conversion chip, the display screen backlight driving chip and the capacitive touch screen input socket to realize data reading, processing and control. The display screen of the LVDS signal interface and the MIPI signal interface can be directly driven, and after the capacitive touch screen is connected, the touch operation communication with the vehicle navigation is supported.

Description

Technical Field

[0001] The utility model relates to the technical field of DP signal display, and more particularly to a vehicle-mounted DP signal conversion and display device. Background Art

[0002] The DP signal conversion module is a device specifically designed to process DisplayPort (DP) interface signals. It integrates multiple functional modules, including a protocol parser, encoding module, decoding module, and transmission and reception links, to achieve efficient conversion and processing of DP interface signals. The DP signal conversion module's primary function is to enable flexible conversion and efficient transmission of DP interface signals.

[0003] The existing DP signal conversion module only converts HDMI signals for output, does not support LVDS and MIPI signal output, and does not have a display backlight driver chip. Therefore, it cannot directly drive displays with LVDS and MIPI signal interfaces, nor does it support capacitive touch screen operation. Its functions are relatively simple and cannot achieve the required functions such as LVDS and MIPI signal output. Utility Model Content

[0004] The technical problem to be solved by the present invention is that the DP signal conversion module in the prior art has relatively simple functions and cannot realize the required functions such as LVDS signal and MIPI signal output. In view of the above-mentioned defects of the prior art, a vehicle-mounted DP signal conversion display device is provided, comprising:

[0005] Electrically connected vehicle-mounted DP signal input socket, MCU processing chip, display backlight driver chip, display backlight socket, capacitive touch screen input socket, MIPI signal output socket, LVDS signal output socket and DP signal conversion chip;

[0006] The vehicle-mounted DP signal input socket is used to receive the DP signal, the DP signal input socket is connected to the DP signal conversion chip, and the DP signal input socket transmits the received DP signal to the DP signal conversion chip for processing;

[0007] The MCU processing chip is connected to the DP signal conversion chip, the display backlight driver chip and the capacitive touch screen input socket to realize data reading, processing and control;

[0008] The display screen backlight driver chip is connected to the backlight assembly through the display screen backlight socket to control the brightness and switching of the backlight;

[0009] The capacitive touch screen input socket is used to receive capacitance change signals from the touch screen and transmit these signals to the MCU processing chip for processing;

[0010] The DP signal conversion chip is used to convert the DP signal into a signal in LVDS or MIPI format, and output it through the LVDS signal output socket and the MIPI signal output socket respectively.

[0011] Preferably, the MCU processing chip includes: any one of Freescale's S32K series or Microchip's PIC series.

[0012] Preferably, the display backlight driver chip includes any one of: DMB8110D, PT4115, OB3350 or TPS61500.

[0013] Preferably, the DP signal conversion chip includes: LT7911D or NX3301W.

[0014] Preferably, the device further includes a DP signal conversion circuit, and the DP signal conversion circuit is used to convert the DP signal into an LVDS signal or a MIPI signal for output.

[0015] Preferably, the device further comprises a display screen backlight power supply circuit, and the display screen backlight power supply circuit is used to supply power to the display screen backlight.

[0016] Preferably, the device further comprises a touch screen interface circuit, which is used to convert analog signals generated when a user touches the screen into digital signals so that the microprocessor or main controller can recognize and process them.

[0017] Preferably, the DP signal conversion circuit includes: pin 64 of the DP signal conversion chip U5 is respectively connected to one end of the resistor R77, one end of the capacitor C97, and pin 3 of the crystal oscillator Y1, pin 63 of the DP signal conversion chip U5 is respectively connected to the other end of the resistor R77, one end of the capacitor C103, and pin 1 of the crystal oscillator Y1, pin 2 of the crystal oscillator Y1 is connected to the other end of the capacitor C103, pin 21 of the DP signal conversion chip U5 is connected to one end of the resistor R71, pin 22 of the DP signal conversion chip U5 is connected to one end of the resistor R70, and the other end of the resistor R71 is connected to the other end of the resistor R70.

[0018] Preferably, the display backlight power supply circuit includes: pin 3 of the display backlight driver chip U21 is respectively connected to one end of the capacitor C58, one end of the capacitor C57, one end of the bidirectional trigger diode B3, and one end of the inductor L3; pin 4 of the display backlight driver chip U21 is respectively connected to one end of the resistor R40 and one end of the capacitor C68; pin 8 of the display backlight driver chip U21 is connected to one end of the capacitor C70; pin 6 of the display backlight driver chip U21 is connected to one end of the capacitor C71; pin 10 of the display backlight driver chip U21 is connected to one end of the resistor R42; pin 5 of the display backlight driver chip U21 is connected to one end of the capacitor C72; pin 7 of the display backlight driver chip U21 is respectively connected to the other end of the capacitor C72, the other end of the resistor R42, the other end of the capacitor C71, the other end of the capacitor C70, the other end of the capacitor C68, one end of the capacitor C69, pin 7 of the display backlight driver chip U21, and the display backlight driver. Pin 15 of chip U21, pin 14 of display backlight driver chip U21, pin 13 of display backlight driver chip U21, pin 12 of display backlight driver chip U21, one end of capacitor C81, one end of resistor R162, and one end of resistor R39 are connected and grounded, pin 9 of display backlight driver chip U21 is respectively connected to the other end of capacitor C81, the other end of resistor R162, and the other end of resistor R39, pin 11 of display backlight driver chip U21 is respectively connected to one end of resistor R38 and one end of resistor R37, pin 2 of display backlight driver chip U21 is respectively connected to pin 1 of display backlight driver chip U21, the positive electrode of diode D4, and the other end of inductor L3, the negative electrode of diode D4 is respectively connected to the other end of resistor R37, one end of capacitor C65, one end of capacitor C66, and one end of capacitor C67, the other end of capacitor C65 is respectively connected to the other end of capacitor C66 and the other end of capacitor C67 and grounded.

[0019] Preferably, the device further comprises a control circuit, which is used to connect to the touch screen interface circuit, convert the signal input by the touch screen interface circuit into UART serial port communication, communicate with the vehicle navigation, and realize touch operation.

[0020] The implementation of the vehicle-mounted DP signal conversion display device of the utility model has the following beneficial effects: it integrates a variety of advanced chips to realize the reception, processing and display of high-definition video signals. Among them, the MCU processing chip, the display backlight driver chip and the DP signal conversion chip are the core components of the device. The MCU processing chip is responsible for the overall control and data processing of the system; the display backlight driver chip controls the brightness of the backlight through PWM technology; and the DP signal conversion chip realizes the conversion of the DP signal to other signal formats. These chips work together to provide the driver with a clear, comfortable and convenient visual experience. With the continuous development of automotive electronics technology, the performance and functions of the vehicle-mounted DP signal conversion display device will be further improved, providing a more solid foundation for intelligent driving and vehicle networking technology; it can directly drive the display screen with LVDS signal interface and MIPI signal interface, and after connecting to a capacitive touch screen, it can also support communication with the vehicle navigation touch operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. The following will further illustrate the present invention in conjunction with the drawings and embodiments. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the vehicle-mounted DP signal conversion and display device of the utility model;

[0023] Figure 2 It is a DP signal conversion circuit in the vehicle-mounted DP signal conversion display device of the utility model;

[0024] Figure 3 It is the display screen backlight power supply circuit in the vehicle-mounted DP signal conversion display device of the utility model;

[0025] Figure 4 It is the touch screen interface circuit in the vehicle-mounted DP signal conversion display device of the utility model;

[0026] Figure 5 The utility model relates to a control circuit in a vehicle-mounted DP signal conversion and display device.

[0027] In the figure, 1-car DP signal input socket, 2-MCU processing chip, 3-display backlight driver chip, 4-display backlight socket, 5-capacitive touch screen input socket, 6-MIPI signal output socket, 7-LVDS signal output socket, 8-DP signal conversion chip. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] See also Figure 1 , is a schematic diagram of the structure of the vehicle-mounted DP signal conversion and display device of the present utility model. Figure 1 As shown, in the vehicle-mounted DP signal conversion display device provided in the first embodiment of the present utility model, at least includes an on-board DP signal input socket, an MCU processing chip, a display backlight driver chip, a display backlight socket, a capacitive touch screen input socket, a MIPI signal output socket, an LVDS signal output socket and a DP signal conversion chip that are electrically connected;

[0032] The vehicle-mounted DP signal input socket is used to receive the DP signal. The DP signal input socket is connected to the DP signal conversion chip. The DP signal input socket transmits the received DP signal to the DP signal conversion chip for processing.

[0033] The MCU processing chip is connected to the DP signal conversion chip, the display backlight driver chip, and the capacitive touch screen input socket to realize data reading, processing, and control;

[0034] The display backlight driver chip is connected to the backlight assembly through the display backlight socket to control the brightness and switch of the backlight;

[0035] The capacitive touch screen input socket is used to receive capacitance change signals from the touch screen and transmit these signals to the MCU processing chip for processing;

[0036] The DP signal conversion chip is used to convert the DP signal into a signal in LVDS or MIPI format, and output it through the LVDS signal output socket and MIPI signal output socket respectively.

[0037] The in-vehicle DisplayPort signal input socket is the entry point for the entire device, receiving DisplayPort signals from external devices (such as navigation systems and onboard computers). This socket complies with the DisplayPort standard, ensuring accurate signal transmission to subsequent processing units. It should be noted that its design must be waterproof, dustproof, and shockproof to withstand the complex in-vehicle environment.

[0038] The MCU (Microcontroller Unit) chip is the core of the entire system, responsible for signal processing and control. It first reads data from the DP signal input socket, decodes it, and performs preliminary processing. The MCU also monitors the operating status of the entire system and adjusts parameters of modules such as the backlight and touch screen as needed. Its high-performance CPU and rich peripheral interfaces ensure efficient system operation and flexible control.

[0039] The operating principle of an MCU processing chip primarily involves steps such as instruction fetching, instruction decoding, data processing, interrupt handling, and timing control. Specifically, the MCU first reads program code from memory and loads it into the CPU's instruction register. The CPU then decodes the instruction and performs corresponding operations based on the instruction's opcode and operands, such as arithmetic and logical operations, and data access. During data processing, the MCU exchanges and processes data through components such as an internal bus and memory and I / O interfaces, performing various calculations, judgments, and control tasks. The MCU also monitors external interrupt requests through an interrupt controller. When an interrupt occurs, it interrupts the current program and jumps to the interrupt service routine to handle the interrupt. Furthermore, the MCU requires a stable clock signal to synchronize the operation of its various components, typically implemented through components such as clock circuits and crystal oscillators.

[0040] In some optional implementations, the MCU processing chip may include, but is not limited to, Freescale's S32K series or Microchip's PIC series. These MCU chips offer powerful processing capabilities, a rich set of peripheral interfaces, and stable performance, meeting the complex and ever-changing control requirements of an in-vehicle environment.

[0041] Display backlight driver chips are responsible for providing stable backlighting for LCDs (Liquid Crystal Displays). Based on instructions from the MCU, they control backlight brightness, on / off, and dimming duty cycle to optimize display quality and minimize energy consumption. Backlight driver chips typically utilize high-frequency DC-AC conversion technology, such as the DMB8110D, to achieve uniform and stable backlight output through precise current control.

[0042] In some optional implementations, the display backlight driver chip includes any one of the following: DMB8110D, PT4115, OB3350, or TPS61500. These chips offer efficient current control and multiple protection features (such as overvoltage protection, overcurrent protection, undervoltage lockout, and thermal shutdown protection), ensuring stable and safe display backlight operation. In this embodiment, the display backlight driver chip is the DMB8110D.

[0043] Backlight driver chips primarily operate based on PWM (pulse-width modulation) technology. PWM technology adjusts the backlight brightness by varying the signal's duty cycle to control the average power. In backlight driver chips, the PWM signal is used to control the on and off times of the backlight LEDs to achieve brightness adjustment. Specifically, when the PWM signal's duty cycle increases, the LED's on time increases, boosting backlight brightness. Conversely, when the duty cycle decreases, the LED's on time decreases, reducing backlight brightness. Backlight driver chips also support automatic and manual dimming modes to meet brightness requirements in different scenarios.

[0044] The display backlight socket connects the backlight driver chip to the backlight tubes or LED array, ensuring safe and stable current transmission to the backlight components. It's important to note that the design of the display backlight socket must consider factors such as current carrying capacity, heat dissipation performance, and ease of maintenance. The display backlight socket must have good conductivity and stability to ensure the proper operation of the backlight LEDs.

[0045] The capacitive touchscreen input jack is the interface between the user and the in-vehicle display system. It receives capacitance change signals from the touchscreen and converts these signals into digital signals for transmission to the MCU for processing. The touchscreen utilizes a multi-layer composite glass structure and locates touch points by sensing changes in the human body's electric field, enabling precise operational response. The capacitive touchscreen input jack connects the touchscreen to the MCU processing chip. It supports multi-touch and gesture recognition, providing a convenient interactive experience for the driver.

[0046] The MIPI (Mobile Industry Processor Interface) signal output socket is used to connect high-performance display modules or camera modules. It utilizes a high-speed serial interface standard, enabling efficient and stable transmission of video and control signals. In automotive display systems, the MIPI interface is often used to connect high-resolution displays or cameras supporting advanced features. The MIPI interface offers high bandwidth and low latency, supporting high-resolution, high-frame-rate video transmission.

[0047] The LVDS (Low-Voltage Differential Signaling) signal output jack is used to connect traditional LVDS displays. Although LVDS interfaces are gradually being replaced by more advanced interfaces such as MIPI with technological advancements, they still have a certain market demand in some older models or specific application scenarios. LVDS uses low-voltage differential signaling to achieve high-speed, long-distance data transmission while reducing electromagnetic interference and power consumption.

[0048] The DP signal converter chip is responsible for converting the incoming DP signal into other signal formats required by the system (such as LVDS, MIPI, etc.). Through its internal signal conversion circuitry and processor, it decodes, processes, and encodes the DP signal, ensuring smooth signal transmission to subsequent modules. The performance of the DP signal converter chip directly affects the clarity and stability of the display.

[0049] In some optional implementations, DP signal conversion chips include the LT7911D or NX3301W. The NX3301W integrates a DP receiver and an HDMI / DVI level converter, supporting multiple signal conversions such as DP to HDMI / DVI and LVDS. It offers advantages such as stable signals, good compatibility, and plug-and-play functionality.

[0050] The operating principles of a DP signal converter chip primarily include DP signal reception, signal decoding, signal processing, and signal conversion. The DP receiver receives the DP signal from an external device and decodes it into a digital signal. This digital signal is then processed and conditioned before being fed into a signal converter. The converter converts the digital signal into the target format (such as LVDS or MIPI). Finally, the converted signal is transmitted to the display or other target device via the corresponding output socket. During this conversion process, the converter chip ensures signal stability and compatibility, ensuring high-quality display quality.

[0051] Figure 2 This is the DP signal conversion circuit in the vehicle-mounted DP signal conversion display device of the utility model. Figure 2As shown, in a specific implementation, the device may further include a DP signal conversion circuit, which is used to convert the DP signal into an LVDS signal or a MIPI signal for output.

[0052] The DP signal conversion circuit includes: pin 64 of the DP signal conversion chip U5 is respectively connected to one end of the resistor R77, one end of the capacitor C97, and pin 3 of the crystal oscillator Y1; pin 63 of the DP signal conversion chip U5 is respectively connected to the other end of the resistor R77, one end of the capacitor C103, and pin 1 of the crystal oscillator Y1; pin 2 of the crystal oscillator Y1 is connected to the other end of the capacitor C103; pin 21 of the DP signal conversion chip U5 is connected to one end of the resistor R71; pin 22 of the DP signal conversion chip U5 is connected to one end of the resistor R70; and the other end of the resistor R71 is connected to the other end of the resistor R70.

[0053] In this embodiment, the DP signal conversion chip U5 is selected as LT7911D.

[0054] Figure 3 This is the display screen backlight power supply circuit in the vehicle-mounted DP signal conversion display device of the utility model. Figure 3 As shown, in a specific implementation, the device further includes a display screen backlight power supply circuit, which is used to supply power to the display screen backlight.

[0055] The display backlight power supply circuit includes: pin 3 of the display backlight driver chip U21 is respectively connected to one end of capacitor C58, one end of capacitor C57, one end of bidirectional trigger diode B3, and one end of inductor L3; pin 4 of the display backlight driver chip U21 is respectively connected to one end of resistor R40 and one end of capacitor C68; pin 8 of the display backlight driver chip U21 is connected to one end of capacitor C70; pin 6 of the display backlight driver chip U21 is connected to one end of capacitor C71; pin 10 of the display backlight driver chip U21 is connected to one end of resistor R42; pin 5 of the display backlight driver chip U21 is connected to one end of capacitor C72; pin 7 of the display backlight driver chip U21 is respectively connected to the other end of capacitor C72, the other end of resistor R42, the other end of capacitor C71, the other end of capacitor C70, the other end of capacitor C68, one end of capacitor C69, pin 7 of the display backlight driver chip U21, and pin 10 of the display backlight driver chip U21. Pin 15 of the display backlight driver chip U21, pin 14 of the display backlight driver chip U21, pin 13 of the display backlight driver chip U21, pin 12 of the display backlight driver chip U21, one end of the capacitor C81, one end of the resistor R162, and one end of the resistor R39 are connected and grounded, pin 9 of the display backlight driver chip U21 is respectively connected to the other end of the capacitor C81, the other end of the resistor R162, and the other end of the resistor R39, pin 11 of the display backlight driver chip U21 is respectively connected to one end of the resistor R38 and one end of the resistor R37, pin 2 of the display backlight driver chip U21 is respectively connected to pin 1 of the display backlight driver chip U21, the positive electrode of the diode D4, and the other end of the inductor L3, the negative electrode of the diode D4 is respectively connected to the other end of the resistor R37, one end of the capacitor C65, one end of the capacitor C66, and one end of the capacitor C67, the other end of the capacitor C65 is respectively connected to the other end of the capacitor C66 and the other end of the capacitor C67 and grounded.

[0056] In this embodiment, the display backlight driver chip U21 is selected as TPS61500.

[0057] The DP signal from the car navigation system is input into this in-vehicle DP signal conversion and display device. The DP signal is converted to an LVDS or MIPI signal for output via the LT7911D DP signal converter chip. The display backlight is powered by the TPS61500 backlight driver chip. The combination of the LT7911D DP signal converter chip and the TPS61500 backlight driver chip allows for direct drive of displays with both LVDS and MIPI signal interfaces.

[0058] Figure 4 The utility model relates to a touch screen interface circuit in a vehicle-mounted DP signal conversion display device. Figure 5This is the control circuit in the vehicle-mounted DP signal conversion and display device of the utility model. Figure 4 、 Figure 5 As shown, the device also includes a touch screen interface circuit, which converts the analog signal generated when a user touches the screen into a digital signal so that the microprocessor or main controller can recognize and process it. The control circuit includes an STM8S103F2P6 processing chip. The control circuit is used to connect to the touch screen interface circuit and convert the signal input from the touch screen interface circuit into a UART serial communication port for communication with the vehicle navigation system to enable touch operation. For an external capacitive touch screen, the touch screen interface is converted to a UART serial communication port through an STM8S103F2P6 processing chip for communication with the vehicle navigation system to enable touch operation.

[0059] The STM8S103F2P6, as a microcontroller, assumes the core control of the system. It performs complex logic operations and data processing, enabling precise control of external devices, sensors, and actuators. The STM8S103F2P6 chip incorporates a highly efficient 8-bit CPU running at a 16 / 24MHz clock frequency, providing up to 20MIPS of processing power. This enables the STM8S103F2P6 to rapidly process data from sensors and other input devices, enabling real-time control and response.

[0060] The STM8S103F2P6 is equipped with 4KB of Flash memory, 1KB of internal RAM, and an embedded EEPROM. These storage resources enable the chip to store program code, variable data, and user configuration information, supporting online program upgrades and flexible configuration.

[0061] The STM8S103F2P6 provides a rich set of peripheral interfaces, including A / D converters, D / A converters, comparators, serial interfaces (such as UART and SPI), and an optional display controller. These interfaces enable the STM8S103F2P6 to easily connect to and control various external devices and sensors, implementing complex data acquisition and communication functions.

[0062] The STM8S103F2P6 features a low-power design that optimizes energy consumption in different operating modes. This is particularly important for embedded systems that require long-term operation and have strict power consumption requirements.

[0063] The working principle of the vehicle-mounted DP signal conversion and display device of the utility model is:

[0064] The first step is signal input: the external device transmits the DP signal to the system through the vehicle-mounted DP signal input socket.

[0065] The second step is signal conversion: The DP signal conversion chip receives the DP signal and decodes and converts it through internal circuits. Depending on the system requirements, the conversion chip converts the DP signal into a signal format such as LVDS or MIPI.

[0066] The third step is signal processing: The MCU processing chip reads the converted signal and performs further processing and control. It adjusts parameters such as backlight brightness and touch screen sensitivity based on preset algorithms and parameters to ensure the optimal display effect and user experience.

[0067] Step 4: Backlight Control: The display backlight driver chip controls the backlight brightness and on / off according to the MCU's instructions. It uses high-frequency DC-AC conversion technology to achieve precise and stable current control, providing uniform backlighting for the LCD.

[0068] Step 5: Display output: The converted signal is transmitted to the display or other display module through the LVDS signal output socket or MIPI signal output socket. The display converts the received signal into an image and displays it on the LCD.

[0069] Step 6: Touchscreen Interaction: Users interact with the system through a capacitive touchscreen. The touchscreen receives touches and transmits capacitance change signals to the MCU. The MCU decodes these signals and executes the corresponding functions based on the user's instructions.

[0070] Throughout its operation, the on-board DP signal conversion and display device achieves a complete process from signal input to display output through close coordination and efficient collaboration between its components. Furthermore, the device also features self-monitoring and fault diagnosis functions, enabling timely detection and resolution of abnormalities, ensuring stable system operation and a positive user experience.

[0071] The workflow of this embodiment is:

[0072] The DP signal of the car navigation is output to the car DP signal input socket 1 of this embodiment, and is converted into LVDS signal output socket 7 and MIPI signal output socket 6 respectively through the DP signal conversion chip 8. When it is necessary to drive a display screen with an LVDS signal or MIPI signal interface, the display screen is connected to the LVDS signal output socket 7 or the MIPI signal output socket 6, and the display backlight is connected to the display backlight socket 4. The display backlight driver chip 3 powers the display backlight through the display backlight socket 4. When using a capacitive touch screen, the capacitive touch screen is connected to the capacitive touch screen input socket 5, and the MCU processing chip 2 is parsed into a serial port to communicate with the car navigation to achieve touch operation.

[0073] Through the design of the above embodiments, the present invention has the following beneficial effects: it integrates a variety of advanced chips to realize the reception, processing and display of high-definition video signals. Among them, the MCU processing chip, the display backlight driver chip and the DP signal conversion chip are the core components of the device. The MCU processing chip is responsible for the overall control and data processing of the system; the display backlight driver chip controls the brightness of the backlight through PWM technology; and the DP signal conversion chip realizes the conversion of the DP signal to other signal formats. These chips work together to provide the driver with a clear, comfortable and convenient visual experience. With the continuous development of automotive electronics technology, the performance and functions of the vehicle-mounted DP signal conversion display device will be further improved, providing a more solid foundation for intelligent driving and vehicle networking technology; it can directly drive the display screen with LVDS signal interface and MIPI signal interface, and after connecting to a capacitive touch screen, it can also support communication with the vehicle-mounted navigation touch operation.

[0074] While the present invention has been described with reference to specific embodiments, those skilled in the art will appreciate that various modifications and equivalents may be made without departing from the scope of the present invention. Furthermore, numerous modifications may be made to adapt the present invention to specific applications without departing from its scope. Therefore, the present invention is not limited to the specific embodiments disclosed herein but encompasses all embodiments falling within the scope of the claims.

Claims

1. A vehicle-mounted DP signal conversion and display device, characterized in that: include: Electrically connected vehicle-mounted DP signal input socket, MCU processing chip, display backlight driver chip, display backlight socket, capacitive touch screen input socket, MIPI signal output socket, LVDS signal output socket and DP signal conversion chip; The vehicle-mounted DP signal input socket is used to receive the DP signal, the DP signal input socket is connected to the DP signal conversion chip, and the DP signal input socket transmits the received DP signal to the DP signal conversion chip for processing; The MCU processing chip is connected to the DP signal conversion chip, the display backlight driver chip and the capacitive touch screen input socket to realize data reading, processing and control; The display screen backlight driver chip is connected to the backlight assembly through the display screen backlight socket to control the brightness and switching of the backlight; The capacitive touch screen input socket is used to receive capacitance change signals from the touch screen and transmit these signals to the MCU processing chip for processing; The DP signal conversion chip is used to convert the DP signal into a signal in LVDS or MIPI format, and output it through the LVDS signal output socket and the MIPI signal output socket respectively.

2. The vehicle-mounted DP signal conversion and display device according to claim 1, characterized in that: The MCU processing chip includes: any one of Freescale's S32K series or Microchip's PIC series.

3. The vehicle-mounted DP signal conversion and display device according to claim 1, characterized in that: The display backlight driver chip includes any one of: DMB8110D, PT4115, OB3350 or TPS61500.

4. The vehicle-mounted DP signal conversion and display device according to claim 1, characterized in that: The DP signal conversion chip includes: LT7911D or NX3301W.

5. The vehicle-mounted DP signal conversion and display device according to claim 1, characterized in that: The device further includes a DP signal conversion circuit, which is used to convert the DP signal into an LVDS signal or a MIPI signal for output.

6. The vehicle-mounted DP signal conversion and display device according to claim 1, characterized in that: The device further comprises a display screen backlight power supply circuit, and the display screen backlight power supply circuit is used to supply power to the display screen backlight.

7. The vehicle-mounted DP signal conversion and display device according to claim 1, characterized in that: The device further comprises a touch screen interface circuit, which is used to convert an analog signal generated when a user touches the screen into a digital signal so that the microprocessor or the main controller can recognize and process the digital signal.

8. The vehicle-mounted DP signal conversion and display device according to claim 5, characterized in that: The DP signal conversion circuit includes: pin 64 of the DP signal conversion chip U5 is respectively connected to one end of the resistor R77, one end of the capacitor C97, and pin 3 of the crystal oscillator Y1, pin 63 of the DP signal conversion chip U5 is respectively connected to the other end of the resistor R77, one end of the capacitor C103, and pin 1 of the crystal oscillator Y1, pin 2 of the crystal oscillator Y1 is connected to the other end of the capacitor C103, pin 21 of the DP signal conversion chip U5 is connected to one end of the resistor R71, pin 22 of the DP signal conversion chip U5 is connected to one end of the resistor R70, and the other end of the resistor R71 is connected to the other end of the resistor R70.

9. The vehicle-mounted DP signal conversion and display device according to claim 6, characterized in that: The display backlight power supply circuit includes: pin 3 of the display backlight driver chip U21 is respectively connected to one end of the capacitor C58, one end of the capacitor C57, one end of the bidirectional trigger diode B3, and one end of the inductor L3; pin 4 of the display backlight driver chip U21 is respectively connected to one end of the resistor R40 and one end of the capacitor C68; pin 8 of the display backlight driver chip U21 is connected to one end of the capacitor C70; pin 6 of the display backlight driver chip U21 is connected to one end of the capacitor C71; pin 10 of the display backlight driver chip U21 is connected to one end of the resistor R42; pin 5 of the display backlight driver chip U21 is connected to one end of the capacitor C72; pin 7 of the display backlight driver chip U21 is respectively connected to the other end of the capacitor C72, the other end of the resistor R42, the other end of the capacitor C71, the other end of the capacitor C70, the other end of the capacitor C68, one end of the capacitor C69, pin 7 of the display backlight driver chip U21, and the display backlight driver chip Pin 15 of U21, pin 14 of the display backlight driver chip U21, pin 13 of the display backlight driver chip U21, pin 12 of the display backlight driver chip U21, one end of the capacitor C81, one end of the resistor R162, and one end of the resistor R39 are connected and grounded, pin 9 of the display backlight driver chip U21 is respectively connected to the other end of the capacitor C81, the other end of the resistor R162, and the other end of the resistor R39, pin 11 of the display backlight driver chip U21 is respectively connected to one end of the resistor R38 and one end of the resistor R37, pin 2 of the display backlight driver chip U21 is respectively connected to pin 1 of the display backlight driver chip U21, the positive electrode of the diode D4, and the other end of the inductor L3, the negative electrode of the diode D4 is respectively connected to the other end of the resistor R37, one end of the capacitor C65, one end of the capacitor C66, and one end of the capacitor C67, the other end of the capacitor C65 is respectively connected to the other end of the capacitor C66 and the other end of the capacitor C67 and grounded.

10. The vehicle-mounted DP signal conversion and display device according to claim 7, characterized in that: The device also includes a control circuit, which is used to connect to the touch screen interface circuit, convert the signal input by the touch screen interface circuit into UART serial port communication, communicate with the vehicle navigation, and realize touch operation.

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