Mini LED backlight module system for improving color gamut range of display equipment

Abstract

The invention provides a Mini LED backlight module system for improving the color gamut range of display equipment, which is characterized in that firstly, high-precision electronic control and an intelligent feedback mechanism are integrated, a distributed driving framework is adopted, and refined light source adjustment is realized; secondly, the light source ratio is adjusted in real time by dynamically analyzing the image content, and the color expression range is widened; then, continuously monitoring the driving current through a closed-loop feedback system, and adopting a self-adaptive correction driving strategy to effectively inhibit the interference of environment and device aging on color stability; finally, through temperature management, power consumption and heat dissipation requirements are dynamically balanced, and stable operation of the system is ensured; in addition, a low-delay processing architecture is adopted, and video signals and backlight response are seamlessly connected. Through deep collaboration of software and hardware, the problems of poor uniformity, thermal color cast and response delay caused by color gamut limitation and aging in the prior art are systematically solved, and the display performance is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of Mini LED, and more specifically, to a Mini LED backlight module system for improving the color gamut range of a display device. Background Art

[0002] With the growing demand for high dynamic range (HDR) and wide color gamut displays, Mini LED backlight technology has become the core direction of LCD display upgrades due to its high brightness and high contrast characteristics. However, the existing Mini LED backlight system still has significant technical bottlenecks in terms of color gamut improvement and electronic control: The first aspect is the limited color gamut and insufficient spectrum control: traditional LED backlight relies on quantum dot film to achieve color gamut expansion, but is limited by the insufficient spectral purity of blue LEDs and the deviation of red / green LED color coordinates, making it difficult to cover a high color gamut range (DCI-P3 ≥ 95%). Traditional dimming algorithms only optimize brightness and lack active control of color gamut coverage, resulting in color level breaks or color distortion when displaying high-saturation colors.

[0003] The second aspect is the defect in partition control accuracy: mainstream partition driving schemes (such as passive matrix driving) are limited by circuit density, the number of physical partitions is limited, and the current control accuracy is low, which causes halo effects and uneven brightness between adjacent partitions.

[0004] The third aspect is the problem of color temperature drift caused by temperature: the high-density arrangement of Mini LEDs leads to local heat accumulation, which easily causes LED wavelength drift. At present, the commonly used temperature compensation scheme relies on a fixed lookup table method, which cannot respond to dynamic heat distribution in real time, resulting in color temperature fluctuations and color deviation.

[0005] Therefore, there is an urgent need for a systematic solution that integrates high-precision electronic control, dynamic color gamut optimization and intelligent thermal management. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide a MiniLED backlight module system for improving the color gamut range of display devices. First, it integrates high-precision electronic control, dynamic color gamut mapping and intelligent feedback mechanism, and adopts a distributed drive architecture to achieve refined light source adjustment; secondly, by dynamically analyzing the image content, the light source ratio is adjusted in real time to improve the color performance range; then, the driving current is continuously monitored through a closed-loop feedback system, and an adaptive correction driving strategy is adopted to effectively suppress the interference of the environment and device aging on color stability; finally, through the collaborative work of temperature management and energy efficiency optimization, power consumption and heat dissipation requirements are dynamically balanced to ensure long-term stable operation of the system; in addition, a low-latency processing architecture is adopted to seamlessly connect video signals and backlight responses to eliminate screen tearing and strobing in dynamic scenes. The present invention systematically solves the coupling problems of color gamut limitations, thermal color deviation and response delay in traditional technologies through deep collaboration between software and hardware, and significantly improves display performance.

[0007] The present invention provides a Mini LED backlight module system for improving the color gamut range of a display device, the system comprising: An input signal analysis module is used to analyze the video stream to obtain image data, and obtain the light source target brightness matrix based on the image data analysis; Dynamic dimming calculation module, used to perform color analysis on image data and generate RGB LED current ratio matrix based on light source target brightness matrix; A distributed driving module, used to obtain a PWM signal for driving each independent partition RGB light source according to a current ratio matrix, and transmit the light source PWM signal to a driving chip based on a preset communication protocol; An intelligent feedback module is used to measure the real-time brightness of the light source, and calculate and correct the light source PWM signal based on the target brightness of the light source and the real-time brightness of the light source; The temperature control management module is used to monitor the temperature of the RGB light source through a temperature sensor and dynamically adjust the light source PWM signal.

[0008] In this solution, the input signal analysis module specifically includes: A signal analysis module, used to analyze and obtain image data according to a preset video stream transmission protocol; A metadata analysis module, used for calculating metadata according to the image data of the video stream; the metadata includes a maximum brightness level MaxCLL and a maximum average brightness level MaxFALL; The brightness conversion module is used to analyze the light source target brightness of each partition according to the image data and metadata to generate a light source target brightness matrix.

[0009] In this solution, the dynamic dimming calculation module specifically includes: The brightness interpolation module adjusts the light source target brightness matrix based on the preset bilinear interpolation algorithm; The color analysis module generates the RGB LED current ratio matrix based on the CIE 1931 chromaticity diagram and the light source target brightness matrix.

[0010] In this solution, the distributed drive module specifically includes: Multi-channel constant current driver chip, which transmits and receives PWM signal parameters through SPI protocol and is used to output drive current; Differential signal routing network, the impedance of each driving current is matched at 100±2Ω.

[0011] In this solution, the intelligent feedback module specifically includes: A driving current detection module is used to measure the real-time driving current of each partition; The feedback controller corrects the light source PWM signal based on the real-time driving current to adjust the output driving current.

[0012] In this solution, the feedback controller further includes: A PID controller, based on the difference between the target driving current of the RGB LED current ratio matrix and the real-time driving current, generates an adjustment control amount according to preset PID parameters for correcting the light source PWM signal; The red light regulator increases the red light current according to a preset red light enhancement algorithm and reduces the blue light current according to a preset white balance algorithm when it is detected that the difference between the red light current and the target red light current exceeds a preset red light current threshold.

[0013] In this solution, the temperature control management module is specifically used to: Based on the temperature sensor, the temperature value of each partition is measured in real time to build a temperature curve; Based on the temperature curve and driving current, predict the temperature change trend of RGB LED and get the temperature prediction value; According to the RGB LED temperature prediction value and the preset temperature attenuation relationship, the temperature attenuation coefficient is obtained to correct the light source PWM signal.

[0014] This plan also includes: Aging database, used to store the accumulated working time of RGB LED; The aging attenuation regulator obtains an aging compensation coefficient according to the accumulated working time of the LED and based on a preset aging light attenuation curve, which is used to correct the light source PWM signal.

[0015] In this solution, the dynamic dimming calculation module is also deployed on FPGA, specifically used for: Parallel computing engine, processing 64-bit image data simultaneously; A compression encoder, which uses a preset compression algorithm to reduce the amount of data transmitted by the data matrix; Hardware CRC check unit ensures the integrity of transmitted data.

[0016] This solution also includes an exception handling mechanism, which specifically includes: Overcurrent protection: real-time monitoring of the real-time driving current. If the real-time driving current exceeds the preset protection current threshold, soft shutdown is triggered; Thermal fuse protection: when the local temperature exceeds the preset over-temperature threshold, the current supply to the corresponding partition will be stopped; SPI data retransmission, automatically initiates three retransmission requests after CRC check fails.

[0017] The present invention provides a Mini LED backlight module system for improving the color gamut range of display devices. First, it integrates high-precision electronic control, dynamic color gamut mapping and intelligent feedback mechanism, and adopts a distributed drive architecture to achieve refined light source adjustment; secondly, by dynamically analyzing the image content, the light source ratio is adjusted in real time to improve the color performance range; then, the driving current is continuously monitored through a closed-loop feedback system, and an adaptive correction drive strategy is adopted to effectively suppress the interference of the environment and device aging on color stability; finally, through the coordinated work of temperature management and energy efficiency optimization, power consumption and heat dissipation requirements are dynamically balanced to ensure long-term stable operation of the system; in addition, a low-latency processing architecture is adopted to seamlessly connect video signals and backlight responses, eliminating the phenomenon of screen tearing and strobing in dynamic scenes. The present invention systematically solves the coupling problems of color gamut limitations, thermal color deviation and response delay in traditional technologies through deep collaboration of software and hardware, and significantly improves display performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope.

[0019] Figure 1 A schematic diagram of topological connection of a Mini LED backlight module system for improving the color gamut range of a display device according to the present invention is shown; Figure 2 A schematic diagram of topological connection of an input signal analysis module provided by an embodiment of the present invention is shown; Figure 3 A schematic diagram of topological connection of an intelligent feedback module provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0020] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0021] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention are explicitly defined in this way.

[0022] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the method of the embodiment of the present invention are not necessarily carried out in order. On the contrary, various steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a step or several steps can be removed from these processes.

[0023] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0024] Figure 1 A schematic diagram of the topological connection of a Mini LED backlight module system for improving the color gamut range of a display device according to the present invention is shown.

[0025] like Figure 1 As shown, the present invention discloses a Mini LED backlight module system 10 for improving the color gamut range of a display device, the system comprising: An input signal analysis module 101 is used to analyze the video stream to obtain image data, and obtain a light source target brightness matrix based on the image data analysis; The dynamic dimming calculation module 102 is used to perform color analysis on the image data and generate an RGB LED current ratio matrix in combination with the light source target brightness matrix; The distributed driving module 103 is used to obtain a PWM signal for driving each independent partition RGB light source according to the current ratio matrix, and transmit the light source PWM signal to the driving chip based on a preset communication protocol; An intelligent feedback module 104 is used to measure the real-time brightness of the light source, and calculate and correct the light source PWM signal based on the target brightness of the light source and the real-time brightness of the light source; The temperature control management module 105 is used to monitor the temperature of the RGB light source through a temperature sensor and dynamically adjust the light source PWM signal.

[0026] It should be noted that the input signal analysis module receives the video stream data according to the preset video data transmission protocol, such as HDMI 2.1FRL, and analyzes the video stream data frame according to the set light source adjustment frequency to obtain the image data to be displayed. The input signal analysis module obtains the target brightness of the RGB LED of each partition by analyzing the image data, and combines them into a light source target brightness matrix; wherein, the matrix array is generated by the arrangement of the partitioned backlight module, and each element in the matrix contains three target brightnesses, namely, the target brightness values ​​of red light, green light and blue light. The dynamic dimming calculation module performs color analysis on the image based on a preset bilinear interpolation algorithm and other filtering algorithms, and generates a filtering value to suppress the halo effect. Then, the dynamic dimming calculation module generates an RGB LED current ratio matrix based on the generated filtering value and the light source target brightness matrix; wherein, the current ratio matrix includes the driving current of the red light, green light and blue light of the backlight module of each partition. The distributed driving module obtains the PWM signal for driving each independent partition RGB light source according to the current ratio matrix; that is, according to the target current value of each RGB LED, a corresponding PWM control signal is generated. The distributed driver module transmits the PWM control signal to the corresponding driver chip based on the preset SPI protocol to output the driving current that meets the color rendering requirements. The intelligent feedback module is a feedback control module that measures the real-time driving current of RGB in each partition in real time, and corrects the RGB light source PWM signal based on the deviation between the real-time driving current and the target driving current to achieve the purpose of adjusting the RGB driving current. Through real-time measurement feedback, the driving current of the RGB LED is closer to the target value, so that the color rendering effect reaches the expected color rendering effect. The temperature control management module measures the temperature of each partition backlight module in real time through a temperature sensor, such as an NTC circuit or a sensor chip. The color rendering effect of the RGB light source will be affected by the temperature, resulting in light decay. The temperature control management module calculates and generates the temperature attenuation coefficient in real time according to the temperature of each partition backlight module, which is used to correct the light source PWM signal to compensate for the light decay, thereby improving the color rendering effect.

[0027] Figure 2 A schematic diagram of topological connections of an input signal analysis module provided by an embodiment of the present invention is shown.

[0028] According to an embodiment of the present invention, Figure 2 As shown, the input signal parsing module specifically includes: The signal analysis module 201 is used to analyze and obtain image data according to a preset video stream transmission protocol; The metadata analysis module 202 is used to calculate metadata according to the image data of the video stream; the metadata includes the maximum brightness level MaxCLL and the maximum average brightness level MaxFALL; The brightness conversion module 203 is used to analyze the light source target brightness of each subarea according to the image data and metadata to generate a light source target brightness matrix.

[0029] It should be noted that the signal analysis module is used to receive and analyze video stream data to obtain image data, specifically, to receive video stream data according to a preset video data transmission protocol (such as HDMI 2.1 FRL); then, according to the set light source adjustment frequency, the video stream data frame is analyzed to obtain the image data to be displayed. The metadata analysis module is used to calculate the image data to obtain metadata, wherein the metadata includes the maximum brightness level MaxCLL and the maximum average brightness level MaxFALL. The maximum brightness level MaxCLL is a brightness level set according to the maximum brightness value of the screen image, which is used to determine the brightness level that the brightest part of the screen can reach, and is an important reference for the display device when displaying the highlight part. The maximum average brightness level MaxFALL is a brightness level corresponding to the average value of the maximum brightness of a group of screen images, which is used to reflect an average peak value of the overall brightness of the screen, and helps the display device to reasonably adjust and optimize the overall brightness of the screen. The brightness conversion module analyzes the RGB light source target brightness corresponding to each partition in the image data based on the maximum brightness level MaxCLL and the maximum average brightness level MaxFALL. Combined with the RGB light source target brightness of each partition and the arrangement of the backlight module, a light source target brightness matrix corresponding to the position of the backlight module is generated.

[0030] According to an embodiment of the present invention, the dynamic dimming calculation module specifically includes: The brightness interpolation module adjusts the light source target brightness matrix based on the preset bilinear interpolation algorithm; The color analysis module generates the RGB LED current ratio matrix based on the CIE 1931 chromaticity diagram and the light source target brightness matrix.

[0031] It should be noted that when the brightness deviation of the RGB light sources in two adjacent partitions is large, the halo phenomenon is likely to occur. Therefore, the brightness interpolation module analyzes the light source target brightness matrix, and the brightness interpolation value generated based on the bilinear interpolation algorithm is used to adjust the light source target brightness matrix, so that the brightness transition is smooth and the effect of suppressing halo is achieved. The color analysis module converts the brightness value into the driving current value of the RGB LED based on the CIE 1931 chromaticity diagram and the light source target brightness matrix, that is, to obtain the RGB LED current ratio matrix.

[0032] According to an embodiment of the present invention, the distributed drive module specifically includes: Multi-channel constant current driver chip, which transmits and receives PWM signal parameters through SPI protocol and is used to output drive current; Differential signal routing network, the impedance of each driving current is matched at 100±2Ω.

[0033] It should be noted that the distributed drive module generates the corresponding PWM control signal according to the preset current signal correspondence table, that is, the current ratio matrix generates the light source PWM signal of the RGB LED of each partition backlight module. Then, based on the preset SPI protocol, the light source PWM signal is transmitted to the corresponding driver chip to output the drive current; wherein the driver chip is a multi-channel constant current driver chip, which can output constant currents of multiple channels according to the PWM signal parameters to drive different LEDs. In addition, the output signal routing of the driver chip adopts a differential signal routing network to accurately control the impedance matching of each drive current and improve the uniformity of current control.

[0034] Figure 3 A schematic diagram of topological connection of an intelligent feedback module provided by an embodiment of the present invention is shown.

[0035] According to an embodiment of the present invention, Figure 3 As shown, the intelligent feedback module specifically includes: A driving current detection module 301 is used to measure the real-time driving current of each partition; The feedback controller 302 corrects the light source PWM signal based on the real-time driving current to adjust the output driving current.

[0036] It should be noted that the driving current detection module is used to measure the real-time driving current of the RGB of each partition backlight module in real time. Based on the real-time driving current, the PWM signal parameters of the multi-channel constant current driving chip are adjusted to achieve the purpose of adjusting the output driving current, thereby adjusting the color rendering effect. The feedback controller calculates the PWM signal adjustment amount in real time based on the deviation between the real-time driving current and the target driving current, which is used to correct the RGB light source PWM signal. By real-time measurement feedback control, the driving current of the RGB LED is closer to the target value, so that the color rendering effect meets the expected color rendering effect.

[0037] According to an embodiment of the present invention, the feedback controller further includes: A PID controller, based on the difference between the target driving current of the RGB LED current ratio matrix and the real-time driving current, generates an adjustment control amount according to preset PID parameters for correcting the light source PWM signal; The red light regulator increases the red light current according to a preset red light enhancement algorithm and reduces the blue light current according to a preset white balance algorithm when it is detected that the difference between the red light current and the target red light current exceeds a preset red light current threshold.

[0038] It should be noted that the feedback controller includes at least two adjustment methods. As an adjustment implementation method, PID control adjustment is adopted: first, based on the RGB LED current ratio matrix, the target driving current of the LED is determined; secondly, the difference between the target driving current and the real-time driving current is calculated; then, based on the preset PID adjustment parameters, according to the above current difference, the proportional control amount, the integral control amount and / or the differential control amount are calculated; finally, according to the above control amount, the light source PWM signal is corrected to control the efficiency and stability of the feedback adjustment. As another adjustment implementation method, red light adjustment is adopted: when it is detected that the difference between the red light current and the target red light current exceeds the preset red light current threshold, it is necessary to increase the red light current through the preset red light enhancement algorithm, and reduce the blue light current based on the white balance algorithm. The specific adjustment formula is: ; ; is the red light current adjustment amount; is the red photocurrent regulation coefficient; is the red light target current value; is the real-time detection value of red light; is the blue light current adjustment amount; is the blue light current adjustment coefficient, set at Within the range.

[0039] According to an embodiment of the present invention, the temperature control management module is specifically used to: Based on the temperature sensor, the temperature value of each partition is measured in real time to build a temperature curve; Based on the temperature curve and driving current, predict the temperature change trend of RGB LED and get the temperature prediction value; According to the RGB LED temperature prediction value and the preset temperature attenuation relationship, the temperature attenuation coefficient is obtained to correct the light source PWM signal.

[0040] It should be noted that in order to compensate for the light decay of RGB LED caused by the temperature rise, which in turn affects the color rendering effect, the temperature control management module measures the temperature of each partition backlight module in real time through a temperature sensor, and generates a temperature attenuation coefficient based on the temperature value, which is used to correct the light source PWM signal. First, a temperature change curve is constructed based on the temperature value measured in real time. Then, based on the temperature change curve and the driving current of the RGB LED, the temperature change trend of the partition backlight module is predicted to obtain a temperature prediction value. Finally, according to the RGB LED temperature prediction value, the corresponding temperature attenuation coefficient is obtained according to the preset temperature attenuation relationship or by looking up the temperature attenuation table, which is used to correct the light source PWM, thereby reducing the light decay problem caused by temperature and improving the color rendering effect.

[0041] According to an embodiment of the present invention, it also includes: Aging database, used to store the accumulated working time of RGB LED; The aging attenuation regulator obtains an aging compensation coefficient according to the accumulated working time of the LED and based on a preset aging light attenuation curve, which is used to correct the light source PWM signal.

[0042] It should be noted that the system provides an aging compensation process. In this embodiment, an aging database is provided to store the cumulative working time of the RGB LED in each partition; wherein the cumulative working time includes the driving current and the duration. Then, according to the cumulative working time of the LED, based on the preset aging light decay curve, the aging compensation coefficient is calculated to correct the light source PWM signal, thereby reducing the influence of the aging light decay of the RGB LED and improving the uniformity of color rendering.

[0043] According to an embodiment of the present invention, the dynamic dimming calculation module is deployed in an FPGA, specifically used for: Parallel computing engine, processing 64-bit image data simultaneously; A compression encoder, which uses a preset compression algorithm to reduce the amount of data transmitted by the data matrix; Hardware CRC check unit ensures the integrity of transmitted data.

[0044] It should be noted that since the dynamic dimming calculation module needs to perform a large number of basic calculations, the conventional CPU software calculation method will occupy a large amount of computing resources and take a long time, which will affect the display refresh frequency. This system deploys the algorithm calculation process of the dynamic dimming calculation module in the FPGA (programmable gate array), and realizes fast calculation through hardware logic circuit design. Among them, the FPGA in this system includes at least a parallel computing engine, a compression encoder and a hardware CRC check unit. The parallel computing engine is used to process image data in parallel to realize 64-bit parallel calculation. The compression encoder uses a preset compression algorithm, including but not limited to Huffman coding and H.265 / HEVC (high-efficiency video coding), to reduce the amount of data during calculation or transmission. The hardware CRC check unit, through hardware calculation, increases the speed of CRC check value calculation to ensure the integrity of the transmitted data.

[0045] According to an embodiment of the present invention, an exception handling mechanism is also included, and the exception handling mechanism specifically includes: Overcurrent protection: real-time monitoring of the real-time driving current. If the real-time driving current exceeds the preset protection current threshold, soft shutdown is triggered; Thermal fuse protection: when the local temperature exceeds the preset over-temperature threshold, the current supply to the corresponding partition will be stopped; SPI data retransmission, automatically initiates three retransmission requests after CRC check fails.

[0046] It should be noted that the system is equipped with an exception handling mechanism to improve the safety and reliability of the system. Among them, the exception handling mechanism includes but is not limited to overcurrent protection, thermal fuse protection and SPI data retransmission. By monitoring the real-time drive current, if the real-time drive current exceeds the preset protection current threshold, the soft shutdown is triggered to stop the current supply of the corresponding backlight module. By measuring the temperature value of each partition backlight module in real time, if the temperature value exceeds the preset over-temperature threshold, the current supply of the corresponding backlight module is stopped, and then cooled down. Three retransmission requests are set to avoid data communication failures due to signal interference.

[0047] It is worth mentioning that it also includes: The ambient light intensity adjustment module generates an ambient light intensity compensation coefficient based on the ambient light intensity, which is used to adjust the light source PWM signal.

[0048] It should be noted that the system provides an ambient light intensity compensation process. In this embodiment, by detecting the ambient light intensity value, if the ambient light intensity value exceeds the preset light intensity threshold, the ambient light intensity compensation coefficient is calculated based on the preset ambient light intensity compensation relationship according to the ambient light intensity value, which is used to adjust the light source PWM signal, thereby reducing the influence of the ambient light intensity on the color rendering effect.

[0049] It is worth mentioning that it also includes: The PID adjustment model sends the adjustment curve of the light source PWM signal to the preset parameter adjustment neural network model to update the PID parameters of the PID controller.

[0050] It should be noted that the system provides a PID adjustment model. In this embodiment, the adjustment of the light source PWM signal is sent to the preset parameter adjustment neural network model to update the PID parameters of the PID controller, thereby optimizing the adjustment efficiency and adjustment stability of the light source PWM signal. For example, by adjusting the proportional parameter, the adjustment efficiency of the light source PWM signal is optimized; by adjusting the integral parameter or the differential parameter, the adjustment stability of the light source PWM signal is optimized.

[0051] In summary, the present invention provides a Mini LED backlight module system for improving the color gamut range of display devices. First, it integrates high-precision electronic control, dynamic color gamut mapping and intelligent feedback mechanism, and adopts a distributed drive architecture to achieve refined light source adjustment; secondly, by dynamically analyzing the image content, the light source ratio is adjusted in real time to improve the color performance range; then, the driving current is continuously monitored through a closed-loop feedback system, and an adaptive correction driving strategy is adopted to effectively suppress the interference of the environment and device aging on color stability; finally, through the collaborative work of temperature management and energy efficiency optimization, power consumption and heat dissipation requirements are dynamically balanced to ensure long-term stable operation of the system; in addition, a low-latency processing architecture is adopted to seamlessly connect video signals and backlight responses to eliminate screen tearing and strobing in dynamic scenes. The present invention systematically solves the coupling problems of color gamut limitations, thermal color deviation and response delay in traditional technologies through deep collaboration of software and hardware, and significantly improves display performance.

[0052] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the system described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Mini LED backlight module system for improving the color gamut range of a display device, characterized in that: The system comprises: An input signal analysis module is used to analyze the video stream to obtain image data, and obtain the light source target brightness matrix based on the image data analysis; Dynamic dimming calculation module, used to perform color analysis on image data and generate RGBLED current ratio matrix in combination with light source target brightness matrix; A distributed driving module, used to obtain a PWM signal for driving each independent partition RGB light source according to a current ratio matrix, and transmit the light source PWM signal to a driving chip based on a preset communication protocol; An intelligent feedback module is used to measure the real-time brightness of the light source, and calculate and correct the light source PWM signal based on the target brightness of the light source and the real-time brightness of the light source; The temperature control management module is used to monitor the temperature of the RGB light source through a temperature sensor and dynamically adjust the light source PWM signal.

2. A Mini LED backlight module system for improving the color gamut range of a display device according to claim 1, characterized in that: The input signal analysis module specifically includes: A signal analysis module, used to analyze and obtain image data according to a preset video stream transmission protocol; A metadata analysis module, used for calculating metadata according to the image data of the video stream; the metadata includes a maximum brightness level MaxCLL and a maximum average brightness level MaxFALL; The brightness conversion module is used to analyze the light source target brightness of each partition according to the image data and metadata to generate a light source target brightness matrix.

3. A Mini LED backlight module system for improving the color gamut range of a display device according to claim 1, characterized in that: The dynamic dimming calculation module specifically includes: The brightness interpolation module adjusts the light source target brightness matrix based on the preset bilinear interpolation algorithm; The color analysis module generates the RGB LED current ratio matrix based on the CIE 1931 chromaticity diagram and the light source target brightness matrix.

4. The Mini LED backlight module system for improving the color gamut range of a display device according to claim 1, characterized in that: The distributed drive module specifically includes: Multi-channel constant current driver chip, which transmits and receives PWM signal parameters through SPI protocol and is used to output drive current; Differential signal routing network, the impedance of each driving current is matched at 100±2Ω.

5. The Mini LED backlight module system for improving the color gamut range of a display device according to claim 1, characterized in that: The intelligent feedback module specifically includes: A driving current detection module is used to measure the real-time driving current of each partition; The feedback controller corrects the light source PWM signal based on the real-time driving current to adjust the output driving current.

6. A Mini LED backlight module system for improving the color gamut range of a display device according to claim 5, characterized in that: The feedback controller further comprises: A PID controller, based on the difference between the target driving current of the RGB LED current ratio matrix and the real-time driving current, generates an adjustment control amount according to preset PID parameters for correcting the light source PWM signal; The red light regulator increases the red light current according to a preset red light enhancement algorithm and reduces the blue light current according to a preset white balance algorithm when it is detected that the difference between the red light current and the target red light current exceeds a preset red light current threshold.

7. The Mini LED backlight module system for improving the color gamut range of a display device according to claim 1, characterized in that: The temperature control management module is specifically used for: Based on the temperature sensor, the temperature value of each partition is measured in real time to build a temperature curve; Based on the temperature curve and driving current, predict the temperature change trend of RGB LED and get the temperature prediction value; According to the RGB LED temperature prediction value and the preset temperature attenuation relationship, the temperature attenuation coefficient is obtained to correct the light source PWM signal.

8. The Mini LED backlight module system for improving the color gamut range of a display device according to claim 1, characterized in that: Also includes: Aging database, used to store the accumulated working time of RGB LED; The aging attenuation regulator obtains an aging compensation coefficient according to the accumulated working time of the LED and based on a preset aging light attenuation curve, which is used to correct the light source PWM signal.

9. The Mini LED backlight module system for improving the color gamut range of a display device according to claim 1, characterized in that: The dynamic dimming calculation module is deployed in FPGA, specifically used for: Parallel computing engine, processing 64-bit image data simultaneously; A compression encoder, which uses a preset compression algorithm to reduce the amount of data transmitted by the data matrix; Hardware CRC check unit ensures the integrity of transmitted data.

10. The Mini LED backlight module system for improving the color gamut range of a display device according to claim 1, characterized in that: It also includes an exception handling mechanism, which specifically includes: Overcurrent protection: real-time monitoring of the real-time driving current. If the real-time driving current exceeds the preset protection current threshold, soft shutdown is triggered; Thermal fuse protection: when the local temperature exceeds the preset over-temperature threshold, the current supply to the corresponding partition will be stopped; SPI data retransmission, automatically initiates three retransmission requests after CRC check fails.

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