OLED display screen driving device

Abstract

The embodiment of the invention relates to the technical field of display driving, and discloses an OLED display screen driving device. The system is connected with a PC device, an auxiliary power supply box, an interface bridging board and a screen conversion board, and comprises an embedded linux core board which is connected with the PC device and an embedded linux bottom board; the embedded linux bottom plate is connected with the interface bridging plate, the screen conversion plate, the auxiliary power supply box, the sampling and power supply driving plate, the HDMI interface, the RGB interface and the MIPI interface; the sampling and power supply driving board is connected with the auxiliary power supply box and the operational amplifier aluminum substrate; an operational amplifier aluminum substrate, wherein the operational amplifier aluminum substrate is connected with the screen conversion board; an HDMI interface, an RGB interface and an MPI interface. The problem that the display driving effect of the OLED display is insufficient can be at least solved.

Description

Technical Field

[0001] The present application relates to the field of display driving technology, and in particular to an OLED display screen driving device. Background Art

[0002] With the continuous advancement of display technology, OLED (organic light-emitting diode) displays are widely used in electronic products such as smartphones, TVs, and wearable devices due to their excellent color performance, self-luminous properties, high contrast, and wide viewing angle. However, how to effectively drive and control OLED displays to achieve the best display effect has become a key issue in the current display technology field.

[0003] There are multiple problems with traditional display driver devices. First, signal quality and integrity is a significant issue. OLED displays have a high demand for high-quality drive signals. Traditional driver devices are prone to problems such as signal jitter, crosstalk, and signal attenuation during signal generation and transmission. These problems will lead to a decrease in the image quality of the display, especially in high-resolution and high-refresh rate display scenarios. Secondly, interface compatibility is also an important challenge. With the advancement of display technology, the interface standards of OLED displays continue to evolve, including HDMI, DisplayPort, MIPI DSI and other interface standards. Traditional driver devices usually have limitations in interface support and are difficult to be compatible with the latest interface standards and specifications, resulting in compatibility issues when driving different types of displays.

[0004] In addition, OLED displays have very high requirements for color accuracy and require precise color calibration to ensure the display effect. Traditional driver devices are often insufficient in color calibration and it is difficult to achieve high-precision color display, which results in the final display effect failing to meet expectations. Summary of the invention

[0005] One object of the present application is to provide an OLED display screen driving device, at least to solve the problem of insufficient display driving effect of the OLED display.

[0006] To achieve the above-mentioned objectives, some embodiments of the present application provide an OLED display screen driving device, which is connected to a PC device, an auxiliary power supply box, an interface bridge board and a screen conversion board. The OLED display screen driving device includes: an embedded Linux core board, which is connected to the PC device and the embedded Linux baseboard; an embedded Linux baseboard, which is connected to the interface bridge board, the screen conversion board, the auxiliary power supply box, a sampling and power drive board, an HDMI interface, an RGB interface and a MIPI interface; a sampling and power drive board, which is connected to the auxiliary power supply box and an op amp aluminum substrate; an op amp aluminum substrate, which is connected to the screen conversion board; an HDMI interface, which is connected to the interface bridge board; an RGB interface, which is connected to the screen conversion board; and an MPI interface, which is connected to the screen adapter board.

[0007] Compared with the related art, the solution provided by the embodiment of the present application significantly improves the image quality of the display screen and the applicability of the device by improving signal quality, enhancing interface compatibility, achieving accurate color calibration, and supporting automated testing. At the same time, the optimized power management and thermal management design ensure the stability and reliability of the device, support for remote firmware updates simplifies maintenance, and the device has good environmental adaptability and can work stably in complex environments such as high temperature and high humidity, fully meeting the high requirements of modern OLED display technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0009] Figure 1 This is a schematic structural diagram of an OLED display screen driving device provided according to the first embodiment of the present application. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0011] The present application embodiment relates to an OLED display screen driving device. Figure 1As shown, the OLED display screen driving device 10 is connected to the PC device 20, the auxiliary power box 30, the interface bridge board 40 and the screen conversion board 50, and is characterized in that the OLED display screen driving device 10 includes: an embedded Linux core board, the embedded Linux core board is connected to the PC device 20 and the embedded Linux bottom board; an embedded Linux bottom board, the embedded Linux bottom board is connected to the interface bridge board 40, the screen conversion board 50, the auxiliary power box 30, the sampling and power drive board, the HDMI interface, the RGB interface and the MIPI interface; a sampling and power drive board, the sampling and power drive board is connected to the auxiliary power box 30 and the operational amplifier aluminum substrate; an operational amplifier aluminum substrate, the operational amplifier aluminum substrate is connected to the screen conversion board 50; an HDMI interface, the HDMI interface is connected to the interface bridge board 40; an RGB interface, the RGB interface is connected to the screen conversion board 50; an MPI interface, the MPI interface is connected to the screen adapter board 50.

[0012] The embedded Linux core board is the control center of the OLED display screen driving device 10, which is connected to the PC device 20 via a network cable to realize data transmission and reception of control instructions. The embedded Linux core board is also connected to the embedded Linux baseboard to manage and coordinate the operations of other components. The built-in processor of the embedded Linux core board can efficiently process image data, control display mode, and perform remote firmware update operations, thereby ensuring that the device always maintains the best functional state. By using the MQTT protocol, the core board communicates with the MQTT Broker module of the PC device 20 to realize remote monitoring and management functions.

[0013] The embedded Linux baseboard serves as a bridge to connect other modules. One end of the embedded Linux baseboard is connected to the embedded Linux core board, and the other end is connected to the interface bridge board 40, the screen conversion board 50, the auxiliary power box 30, the sampling and power driver board, the HDMI interface, the RGB interface, and the MIPI interface. The embedded Linux baseboard communicates with the MCU module of the interface bridge board 40 and the auxiliary power box 30 through the UART CAN bus to ensure the stability and real-time performance of data transmission. In addition, the embedded Linux baseboard is connected to the screen interface converter of the screen conversion board 50 through the I2C bus to achieve accurate transmission and control of display signals.

[0014] The sampling and power driver board is responsible for monitoring and adjusting the power supply status to ensure stable operation of the OLED display. The sampling and power driver board is connected to the DAC module of the auxiliary power box 30 through the power harness to achieve accurate voltage and current sampling. By monitoring the power status in real time, the sampling and power driver board can provide stable power support, reduce display abnormalities caused by power fluctuations, and thus improve the reliability of the display.

[0015] The op amp aluminum substrate is connected to the screen conversion board 50 to provide the necessary voltage amplification and regulation functions for the display screen. By optimizing the circuit design, the op amp aluminum substrate can reduce noise and signal distortion and improve signal clarity and stability. This part of the design is particularly important for long-term high-load working environments, and can effectively prevent the display screen from experiencing image quality degradation or signal instability after long-term work.

[0016] The interface bridge board 40 is mainly responsible for connecting to the HDMI interface, and through the conversion function of the bridge chip, different types of signal standards are compatible and converted. The design of the interface bridge board supports multiple display standards, so that the OLED display screen can be compatible with different input sources, improving the versatility and flexibility of the device. The interface bridge board 40 also communicates with the embedded Linux backplane through the UART CAN bus to achieve effective transmission of signals and data.

[0017] The screen conversion board 50 is connected to the display screen through multiple interfaces (including RGB and MIPI) to achieve the conversion and transmission of display signals. By connecting to the op amp aluminum substrate, the screen conversion board 50 can provide stable power and signal support to ensure that the display screen can work normally. In addition, the design of the screen conversion board 50 takes into account the high-resolution display requirements, and optimizes the display effect through high-precision signal processing and adjustment.

[0018] HDMI interface: connected to the interface bridge board 40 through an HDMI cable harness, supports high-definition multimedia input, and provides clear and stable image signal transmission.

[0019] RGB interface: connected to the screen conversion board 50 via the RGB bus, supports the transmission and display of traditional RGB signals, and ensures compatibility with traditional display devices.

[0020] MIPI interface: connected to the screen conversion board 50 via the MIPI bus, adapted to the needs of modern high-resolution display screens, and supporting higher transmission rates and more sophisticated display effects.

[0021] In summary, the OLED display screen driving device 10 in this embodiment realizes high-quality signal processing, reliable power management, flexible interface compatibility and precise color calibration by reasonably configuring the embedded Linux core board, baseboard, sampling and power driver board, operational amplifier aluminum substrate, and various interface modules, thereby meeting the high performance requirements of modern OLED displays in various application scenarios.

[0022] Specifically, the embedded Linux core board is connected to the MQTT BROKER module of the PC device via a network cable. This connection method uses the MQTT (message queue telemetry transmission) protocol to communicate. MQTT is a lightweight, open message transmission protocol that is very suitable for Internet of Things (IoT) devices and remote monitoring applications. In this system, the MQTT Broker module is responsible for processing and routing messages from the PC device 20, and the embedded Linux core board acts as an MQTT client, connected to the PC device via a network cable, receiving control instructions and sending status information. This connection method can not only achieve remote monitoring and control, but also improve the real-time performance and flexibility of the system.

[0023] The embedded Linux baseboard is connected to the MCU module of the interface bridge board through UART CAN. The combination of UART (Universal Asynchronous Receiver / Transmitter) and CAN (Controller Area Network) bus provides an efficient and reliable way for communication between the baseboard and the interface bridge board. The CAN bus has strong anti-interference ability and high reliability, and is particularly suitable for multi-node communication in industrial environments. Through this connection, the embedded Linux baseboard can send control signals and instructions to the MCU module of the interface bridge board, ensuring seamless conversion of display signals between different interfaces and improving the compatibility and scalability of the system.

[0024] The embedded Linux baseboard is connected to the MCU module of the auxiliary power box via UART CAN. This connection mode allows the embedded Linux baseboard to monitor and control the state of the auxiliary power box in real time, such as adjusting parameters such as power output, voltage, current, etc., to ensure that the OLED display screen obtains a stable power supply. Through the efficient data transmission capability of the CAN bus, the system can achieve rapid response and fault detection, thereby improving the reliability and safety of the overall system. In practical applications, the auxiliary power box can be connected to the OLED display screen driver as an external device, or it can be integrated into the OLED display screen driver.

[0025] The embedded Linux baseboard is connected to the screen interface converter of the screen adapter board through the I2C bus. I2C is a multi-master-slave, bidirectional, two-wire serial bus standard with the advantages of simplicity, flexibility and low cost. In this system, the I2C bus is used for data transmission and control signal transmission between the embedded Linux baseboard and the screen adapter board. Through the I2C bus, the baseboard can directly control the working state of the screen interface converter, adjust the display parameters and modes, to meet the needs of OLED display screens of different types and specifications.

[0026] Specifically, the OLED display screen driving device includes: a sampling and power driving board is connected to the DAC module of the auxiliary power box through a power harness. This connection mode enables the sampling and power driving board to obtain and adjust the voltage and current data from the auxiliary power box in real time. The digital signal is converted into an analog voltage output, thereby providing an accurate and stable power supply for the display screen. Through this connection, the system can dynamically adjust the power supply parameters according to the different working states and requirements of the display screen, ensuring that the OLED display screen can work stably under different brightness and load conditions.

[0027] The operational amplifier aluminum substrate and the screen conversion board are connected to the screen interface connector of the screen adapter board through a power harness. The operational amplifier aluminum substrate is responsible for amplifying and regulating the power signal and providing high-quality voltage output. Through the connection with the screen conversion board, the operational amplifier aluminum substrate can directly power the OLED display screen, ensuring that the screen obtains a stable, low-noise power supply during the display process, thereby improving the image quality and display effect.

[0028] The HDMI interface is connected to the HDMI interface of the interface bridge board through an HDMI harness; the RGB interface is connected to the screen interface connector of the screen conversion board through an RGB bus; and the MPI interface is connected to the screen interface connector of the screen conversion board through an MPI bus.

[0029] Through the HDMI interface connection of the interface bridge board, the OLED display screen driver device can receive high-definition signals from external devices such as PC devices and Blu-ray players, and transmit them to the OLED display screen to achieve high-quality audio and video display. Through the RGB interface, the OLED display screen driver device 10 is compatible with traditional video signal input, supports the processing and display of RGB signals, and adapts to different types of signal sources. Through the MIPI interface, the OLED display screen driver device can support high-resolution and high-refresh rate display requirements, ensuring that the signal is losslessly and quickly transmitted to the display screen during the transmission process, achieving a delicate and smooth display effect.

[0030] Specifically, the PC device includes an MQTT BROKER module and a PC host computer. The MQTT Broker module is a key component in the PC device, which is used to process and route messages from various clients. The embedded Linux core board, as an MQTT client, is connected to the PC device via a network cable and communicates with the MQTT Broker module. The MQTT Broker module is responsible for distributing control instructions from the PC host computer to the embedded Linux core board, and receiving status information and feedback from the core board. This communication method based on the MQTT protocol provides low-latency and high-efficiency data transmission, ensuring real-time interaction and control between the drive device and the PC device.

[0031] The PC host computer is the main interface for users to operate and monitor the system. It can send control instructions, set display parameters, monitor the operating status of the OLED display, etc. The host computer software interacts with the user through a graphical user interface (GUI), allowing the user to enter the configuration parameters of the display, such as brightness, contrast, color temperature, etc., and send these parameters to the embedded Linux core board through the MQTT Broker module. In addition, the PC host computer can also display the working status and fault information of the OLED display in real time, helping users to quickly identify and solve problems.

[0032] Through the cooperation of MQTT Broker module and PC host computer, PC equipment realizes centralized control and management of OLED display screen driver. MQTT Broker module ensures fast and stable transmission of information between devices, while PC host computer provides users with an intuitive and easy-to-operate control interface, allowing users to easily adjust various parameters of the display screen and monitor the operating status of the device. This design not only improves the operability and flexibility of the system, but also enables the OLED display screen driver to better adapt to the needs of different application scenarios.

[0033] Specifically, the auxiliary power supply box includes a switching power supply module, an MCU module, a DAC module and a voltage sampling module. The switching power supply module includes a +24V switching power supply module and a -24V switching power supply module, which are responsible for converting the input mains voltage into a stable DC voltage required by the OLED display driver. By adopting efficient switching power supply technology, the module can provide sufficient power while maintaining low power consumption and reducing heat generation. The output voltage of the switching power supply module can be adjusted according to the requirements of the display to ensure the stability and reliability of the power supply in different working modes.

[0034] The MCU (microcontroller unit) module is used to control the overall operation of the auxiliary power box. The MCU module is connected to the embedded Linux backplane through the UART CAN bus, receives control instructions from the backplane, and adjusts the working status of the switching power module and the DAC module according to these instructions. The introduction of the MCU module enables the auxiliary power box to achieve intelligent management, which can not only adjust the power output in real time, but also perform fault diagnosis and protection, such as overvoltage and overcurrent protection, to enhance the safety of the system.

[0035] The DAC (digital-to-analog converter) module is used to convert the digital control signal sent by the MCU module into an analog voltage signal, thereby accurately adjusting the output voltage. The DAC module is connected to the sampling and power driver board through the power harness to provide an adjustable voltage signal to the driver board. In this way, the system can dynamically respond to the power requirements of the OLED display and adjust the power output to optimize the display effect and energy efficiency. The high-precision adjustment capability of the DAC module ensures the stability and accuracy of the power output.

[0036] The voltage sampling module is used to monitor the output voltage of the auxiliary power box in real time. The module is connected to the MCU module and the DAC module, and feeds back the collected voltage signal to the MCU module and the DAC module, so that the MCU can adjust the power output in real time to keep the output voltage within the set range. The existence of the voltage sampling module ensures the stability of the power supply when the system is running for a long time, and effectively prevents display failure or image quality degradation caused by voltage fluctuations.

[0037] Specifically, the interface bridge board includes an MCU module, an HDMI interface, and an RBG bridge chip or a MIPI bridge chip.

[0038] The MCU module is the core control unit of the interface bridge board, responsible for managing the signal conversion and interface control functions on the interface bridge board. The MCU module is connected to the embedded Linux backplane through the UART CAN bus, receives control instructions sent by the backplane, and performs signal switching and interface configuration. The MCU module can select the appropriate signal path to ensure effective signal transmission by controlling the RGB bridge chip or MIPI bridge chip according to the type of display and the input signal. Through the intelligent control of the MCU module, the interface bridge board can dynamically adapt to different signal input requirements and improve the compatibility and flexibility of the system.

[0039] The RGB bridge chip is used to convert HDMI signals or other digital video signals into analog RGB signals to be compatible with display devices that use RGB input interfaces. The chip can support the conversion of multiple video formats to ensure that the signal is converted and output without loss during transmission. By controlling the RGB bridge chip, the MCU module can selectively convert the HDMI input signal into RGB signals to meet the needs of traditional display devices or certain industrial application scenarios.

[0040] MIPI bridge chips are used to convert HDMI signals or other signal standards into MIPI (Mobile Industry Processor Interface) signals, which are suitable for high-resolution, low-power display devices. MIPI interface is widely used in mobile devices and high-end displays because it supports high-speed serial data transmission and can provide higher image quality and response speed. Through the MIPI bridge chip, the interface bridge board can convert standard HDMI signals into MIPI signals and transmit them directly to the OLED display, making it compatible with modern high-resolution display requirements.

[0041] Specifically, the sampling and power driver board includes: DAC circuit, filter, ADC circuit, low noise amplifier and reference voltage source. The DAC circuit in the sampling and power driver board adopts a higher resolution design, increasing the number of bits from the traditional 8 bits to 12 bits. This design greatly improves the fineness of the output signal, making the signal closer to the original digital signal during the conversion process. In order to further improve the accuracy of the output signal, calibration and compensation technology is introduced. By correcting the nonlinear error of the DAC, the converted analog signal has higher linearity and accuracy.

[0042] In addition, the DAC circuit uses advanced filter and noise shaping technologies, which can effectively reduce noise and distortion in the output signal. By optimizing the layout of the power supply and ground wires, the DAC circuit reduces the interference introduced by power supply noise and ground loops, thereby providing a purer and more stable analog signal output. These improvements enable the OLED display to obtain higher quality drive signals and improve the display effect.

[0043] The filter can remove high-frequency noise and unnecessary interference signals from the signal. By using low-pass filters and band-pass filters, it can ensure that only signals in the required frequency band are allowed to pass, reducing the impact of noise in other frequency bands. Combined with noise shaping technology, the filter can further improve the signal-to-noise ratio of the signal and make the output signal closer to the ideal waveform.

[0044] The ADC circuit in the sampling and power driver board adopts a higher resolution design, increasing the number of bits from the traditional 12 bits to 24 bits. This increase significantly increases the accuracy of the sampled signal, allowing it to capture more subtle changes in the process of converting analog signals to digital signals, providing higher quality digital data.

[0045] In order to further improve the conversion accuracy, the ADC circuit adopts self-calibration technology, which can automatically correct offset errors and gain errors to ensure the conversion accuracy of the signal. The sampling rate of the ADC circuit has also been improved, from a few kHz to hundreds of kHz to meet the acquisition requirements of high-frequency signals. This high sampling rate combined with multi-channel parallel sampling technology greatly improves data acquisition efficiency and bandwidth, can process multiple signal channels at the same time, and improves the parallel capability of data processing.

[0046] The low noise amplifier has low input noise and high gain stability, which can amplify weak signals without introducing significant noise. In addition, the noise level of the system is further reduced by optimizing the PCB layout and shielding design. These measures improve the dynamic range of the signal and ensure that the quality of the signal remains consistent throughout the entire processing process.

[0047] The reference voltage source provides a stable reference voltage for the DAC and ADC circuits to ensure the accuracy and consistency of signal conversion. The high-precision, low-drift reference voltage source design enables the system to maintain a stable voltage reference under different temperature and load conditions, avoiding signal deviations caused by voltage fluctuations.

[0048] In order to reduce power consumption, the sampling and power driver board adopts low-power architecture and CMOS technology. When high sampling rate and high resolution are not required, the system is designed with energy-saving mode to reduce power consumption. This design not only extends the service life of the equipment, but also reduces the heat generated by the system during long-term operation, improving the overall reliability and stability.

[0049] Through the above design and optimization, the signal processing capability and quality of the sampling and power driver board have been significantly improved. The high resolution and linearity improvement of the DAC circuit make the output signal more accurate and delicate; the application of filter and noise shaping technology effectively reduces signal noise and distortion; the high resolution and high sampling rate design of the ADC circuit meet the needs of high-frequency signal acquisition; the use of low-noise amplifiers and reference voltage sources improves the dynamic range and stability of the signal; the low-power design ensures that the system maintains low power consumption while running efficiently.

[0050] Optionally, the OLED display screen driving device further includes: a cooling module, including a fan or liquid cooling, for dissipating heat from the OLED display screen driving device. The OLED display screen driving device performs an optimized design of the heat flow path in the circuit board layout. By rationally arranging the positions of power-intensive components, it is ensured that the heat can be effectively dispersed and conducted. In addition, more heat dissipation holes and copper foil layers are added to the circuit board to enhance the thermal conduction and heat dissipation performance. The addition of the copper foil layer significantly improves the thermal conductivity of the circuit board, so that the heat can be quickly conducted from the heat source to the heat dissipation area, thereby preventing local overheating. This improved heat dissipation design can more effectively disperse the heat on the circuit board to the surrounding environment, reduce the temperature inside the driving device, ensure that each component operates within a normal operating temperature range, and reduce component failure or performance degradation caused by overheating. Through this layout optimization, the heat forms an effective heat flow path on the circuit board, avoiding the accumulation of heat in a certain area and improving the overall heat dissipation efficiency.

[0051] In order to monitor and manage the temperature of the OLED display driver in real time, the system adds thermal sensors (temperature sensors), which can be distributed in key locations on the circuit board, such as near the power amplifier, processor, and power module. The thermal sensors can monitor the temperature of these areas in real time and feed back the temperature data to the embedded Linux core board or MCU module. When the temperature exceeds the set safety threshold, the system can trigger an active cooling mechanism through software.

[0052] Active cooling solutions include fans and liquid cooling. Fans can dynamically adjust speed according to temperature changes, providing variable cooling air flow, thereby effectively reducing component temperature. In the case of higher heat dissipation requirements, a liquid cooling system can be used to remove heat through liquid circulation. The liquid cooling system has a high heat exchange efficiency and can significantly reduce the temperature of the device in a short time. Through the combination of thermal sensors and active cooling systems, the system can automatically respond to temperature changes, adjust the cooling intensity in real time, avoid overheating, and ensure stable operation of the equipment.

[0053] Optionally, the OLED display driver also includes: a remote firmware update module, which is used to upgrade the firmware through the network, provide online maintenance and function expansion. The remote firmware update module of the OLED display driver is connected to the external network through the embedded Linux core board, and can receive firmware update packages from a remote server. The update module supports multiple network protocols, including MQTT, HTTP and FTP, to ensure reliable firmware download and update in different network environments. Through this remote firmware update function, the device's firmware can be updated to the latest version in a timely manner to fix known vulnerabilities, improve system performance, add new functions or optimize existing functions.

[0054] The workflow of the remote firmware update module includes four steps: detection, download, verification and installation: the system will check whether a new version of the firmware is available regularly or when triggered by the user. Through the network connection, the driver will query the firmware version information on the remote server; if a new version of the firmware is detected, the system will automatically download the firmware update package. The download process can be carried out through an encrypted connection to ensure the security of the transmission; after the download is completed, the system will verify the integrity and security of the firmware package, such as checking the file hash value and digital signature to prevent malware or wrong firmware packages from being installed; after the verification is passed, the firmware update will be performed in an appropriate time window, such as when the device is idle or under low load, to avoid affecting normal use. During the installation process, the system will back up the current firmware to restore it when the update fails; the introduction of the remote firmware update module enables the OLED display driver to be easily maintained online, reducing the frequency and complexity of manual maintenance. Users or operation and maintenance personnel can update the system without physical contact with the device, reducing maintenance costs and time. In addition, remote firmware updates also provide support for functional expansion. New display functions can be introduced, existing algorithms can be optimized, or system compatibility can be improved through software upgrades, extending the life cycle of the device.

[0055] Optionally, the embedded Linux core board includes: an adjustment module for controlling the display brightness, contrast and color temperature of the OLED display screen; an image processing unit for controlling the switching of the display mode of the OLED display screen; and a non-volatile memory for storing display configuration parameters and firmware programs.

[0056] The adjustment module on the embedded Linux core board is used to control the display parameters of the OLED display, including brightness, contrast and color temperature. The adjustment module dynamically adjusts these parameters of the display to adapt to different usage scenarios and user preferences by receiving instructions from the PC host or other control devices. The adjustment module can use PWM (pulse width modulation) technology to adjust the brightness, use Gamma correction algorithm to optimize the contrast, and achieve color temperature changes by adjusting the driving voltage of RGB sub-pixels.

[0057] The adjustment module can adjust the brightness of the display screen according to the ambient light conditions or user settings to provide the best viewing experience. For example, lower the brightness in a dark environment to reduce eye fatigue, and increase the brightness in strong light to ensure screen readability. By adjusting the black and white levels of the display signal, the adjustment module can enhance the contrast of the image, make the image details clearer, and improve the display effect. By adjusting the driving voltage of the red, green, and blue pixels of the display, the adjustment module can change the color temperature of the screen to achieve the conversion of warm and cold tones to meet the needs of different scenarios, such as reading mode, theater mode, etc.

[0058] The image processing unit integrated in the embedded Linux core board is used to manage the display mode switching of the OLED display. The image processing unit is able to process the input video signal and apply different image enhancement algorithms, such as noise reduction, demosaicing, sharpening, etc., to improve the image quality. In addition, the image processing unit can switch different display modes on the display, such as standard mode, movie mode, game mode, etc. The image processing parameters in each mode can be pre-configured to optimize the viewing experience in a specific scenario.

[0059] The image processing unit can automatically switch display modes by analyzing the characteristics of the input signal or receiving user instructions. For example, when movie content is detected, it can automatically switch to movie mode to enhance color and contrast to provide more vivid visual effects. Through the built-in image processing algorithm, the image processing unit can process low-quality input signals, improve the picture quality, and make the final display effect clearer and more realistic.

[0060] The non-volatile memory of the embedded Linux core board is used to store display configuration parameters and firmware programs. The non-volatile memory can maintain the integrity of the stored data in the event of a power outage, ensuring that the device configuration and firmware will not be lost. Display configuration parameters such as brightness, contrast, color temperature and other user settings can be stored in the non-volatile memory, and when the device is restarted, the previous settings can be automatically restored. The storage of firmware programs ensures that the system can safely and reliably update the firmware during upgrades or maintenance.

[0061] The display parameters set by the user, such as brightness, contrast and color temperature, are saved in the non-volatile memory, ensuring that the display automatically loads these parameters each time the device is started, without the need for the user to set them repeatedly. The non-volatile memory is used to store the system's firmware program, ensuring that the firmware can be safely and completely stored and read when the device firmware is upgraded or the system is restored.

[0062] Specifically, the OLED display screen driving device 10 is connected and drives AD5328 and ADS1158 chips through SPI (serial peripheral interface) to achieve accurate voltage output and multi-channel data acquisition functions. AD5328 is a high-precision 8-channel, 12-bit DAC (digital-to-analog converter) chip that can output a configurable 0-15V voltage. The OLED display screen driving device is connected to the AD5328 chip through the SPI interface, and the embedded Linux core board or other control unit sends a control signal to the AD5328 through the SPI interface. The SPI interface is a full-duplex synchronous serial communication protocol, suitable for high-speed data transmission, and is used to accurately control the DAC output in the present embodiment.

[0063] Through the SPI interface, the driver can configure each channel of the AD5328 and set the required output voltage range (0-15V). These voltages can be used to provide the required driving voltage for different circuit parts of the OLED display, or for other modules that require precise voltage control. The configurable voltage output function of the AD5328 chip can dynamically adjust the power supply of the display to adapt to different display modes or power requirements. For example, when displaying at high brightness, the voltage can be increased to enhance the brightness; in energy-saving mode, the voltage can be reduced to reduce power consumption.

[0064] ADS1158 is a high-precision 16-channel, 24-bit ADC (analog-digital converter) chip suitable for multi-channel voltage and current collection. The OLED display screen driver 10 is connected to the ADS1158 chip via the SPI interface, and the embedded Linux core board controls the ADC chip to sample via the SPI interface. Through the SPI interface, ADS1158 can collect analog signals of up to 16 channels. In this embodiment, the system configuration collects 7 voltages, 7 currents and 1 NTC temperature. The high resolution (24 bits) and high sampling rate of ADS1158 enable the system to accurately measure and monitor the voltage and current state of each channel. ADS1158 is also connected to an NTC temperature sensor for real-time monitoring of temperature changes inside the driver. The resistance of the NTC sensor changes with temperature, and the current temperature value can be calculated by collecting its voltage change through ADC, which helps the system to perform thermal management.

[0065] SPI interface plays a key communication bridge role in the present embodiment, providing efficient and stable data transmission channel.Through SPI interface, embedded Linux core board can communicate with AD5328 and ADS1158 chips efficiently.The synchronous clock of SPI interface makes data transmission faster and more reliable, which is particularly suitable for occasions requiring real-time control and monitoring.SPI interface allows embedded Linux core board to dynamically configure the working mode of DAC and ADC chips, set output voltage and sampling rate, and respond to system requirements in time.Through SPI interface, the voltage, current and temperature data collected can be quickly transmitted to embedded Linux core board for further processing, analysis and display.These real-time data help the system to adjust itself in actual operation and optimize performance.

[0066] The scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim may also be implemented by one unit or device through software or hardware. The words "first", "second", etc. are only used to distinguish the description, and do not indicate any particular order, nor can they be understood as indicating or implying relative importance.

[0067] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily mention changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims, and the above embodiments should be regarded as exemplary and non-restrictive.

Claims

1. An OLED display screen driving device connected to a PC device, an auxiliary power box, an interface bridge board and a screen conversion board, characterized in that: The OLED display screen driving device comprises: An embedded Linux core board, the embedded Linux core board is connected to the PC device and the embedded Linux baseboard; An embedded Linux baseboard, the embedded Linux baseboard is connected to the interface bridge board, the screen conversion board, the auxiliary power box, the sampling and power drive board, the HDMI interface, the RGB interface and the MIPI interface; A sampling and power drive board, wherein the sampling and power drive board is connected to the auxiliary power box and the operational amplifier aluminum substrate; An operational amplifier aluminum substrate, the operational amplifier aluminum substrate being connected to the screen conversion board; HDMI interface, the HDMI interface is connected to the interface bridge board; RGB interface, the RGB interface is connected to the screen conversion board; MPI interface, the MPI interface is connected to the screen adapter board.

2. The OLED display screen driving device according to claim 1, characterized in that: The OLED display screen driving device comprises: The embedded Linux core board is connected to the MQTT BROKER module of the PC device via a network cable; The embedded Linux baseboard is connected to the MCU module of the interface bridge board through UART CAN; the embedded Linux baseboard is connected to the MCU module of the auxiliary power box through UART CAN; the embedded Linux baseboard is connected to the screen interface converter of the screen adapter board through I2C bus.

3. The OLED display screen driving device according to claim 2, characterized in that: The OLED display screen driving device comprises: The sampling and power drive board is connected to the DAC module of the auxiliary power box through a power harness; The operational amplifier aluminum substrate and the screen conversion board are connected to the screen interface connector of the screen adapter board through a power harness; The HDMI interface is connected to the HDMI interface of the interface bridge board through an HDMI harness; the RGB interface is connected to the screen interface connector of the screen conversion board through an RGB bus; and the MPI interface is connected to the screen interface connector of the screen conversion board through an MPI bus.

4. The OLED display screen driving device according to claim 3, characterized in that: The PC device includes an MQTTBROKER module and a PC host computer.

5. The OLED display screen driving device according to claim 4, characterized in that: The auxiliary power supply box comprises a switching power supply module, an MCU module, a DAC module and a voltage sampling module.

6. The OLED display screen driving device according to claim 5, characterized in that: The interface bridge board includes an MCU module, an HDMI interface, and an RBG bridge chip or a MIP I bridge chip.

7. The OLED display screen driving device according to any one of claims 1 to 6, characterized in that: The sampling and power driving board includes: a DAC circuit, a filter, an ADC circuit, a low noise amplifier and a reference voltage source.

8. The OLED display screen driving device according to claim 1, characterized in that: The OLED display screen driving device further includes: a cooling module, including a fan or liquid cooling, for dissipating heat from the OLED display screen driving device.

9. The OLED display screen driving device according to claim 1, characterized in that: The OLED display screen driving device also includes: a remote firmware update module, which is used to perform firmware upgrades via the network and provide online maintenance and function expansion.

10. The OLED display screen driving device according to claim 1, characterized in that: The embedded Linux core board includes: an adjustment module for controlling the display brightness, contrast and color temperature of the OLED display screen; an image processing unit for controlling the switching of the display mode of the OLED display screen; and a non-volatile memory for storing display configuration parameters and firmware programs.

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