A Mini LED backlight module system for improving the color gamut range of display devices

Abstract

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 and intelligent feedback mechanisms, adopts a distributed drive architecture, and realizes refined light source adjustment. Second, by dynamically analyzing image content, it adjusts the light source ratio in real time to improve the color performance range. Then, through a closed-loop feedback system, it continuously monitors the drive current and adopts an adaptive correction drive strategy to effectively suppress the interference of the environment and device aging on color stability. Finally, through temperature management, it dynamically balances power consumption and heat dissipation requirements to ensure stable operation of the system. In addition, it adopts a low-latency processing architecture to seamlessly connect video signals and backlight responses. Through deep collaboration between software and hardware, the present invention systematically solves the problems of color gamut limitations, poor uniformity caused by aging, and the coupling of thermal color shift and response delay in traditional technologies, significantly improving display performance.

Description

Technical Field

[0001] The present invention relates to the field of Mini LEDs, 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 a core direction for LCD display upgrades due to its high brightness and high contrast characteristics. However, existing Mini LED backlight systems still have significant technical bottlenecks in color gamut improvement and electronic control:

[0003] The first aspect is 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 light LEDs and the deviation of red / green light 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 regulation of color gamut coverage, resulting in color level breaks or color distortion when displaying high-saturation colors.

[0004] 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.

[0005] 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 solution 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.

[0006] 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

[0007] 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; second, 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 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 the video signal and backlight response, 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 between software and hardware, and significantly improves display performance.

[0008] The present invention provides a Mini LED backlight module system for improving the color gamut range of a display device, the system comprising:

[0009] The 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;

[0010] 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;

[0011] A distributed driving module is used to obtain PWM signals for driving each independent partition RGB light source according to the current ratio matrix, and transmit the light source PWM signals to the driving chip based on a preset communication protocol;

[0012] 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;

[0013] 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.

[0014] In this solution, the input signal analysis module specifically includes:

[0015] A signal analysis module is used to parse and obtain image data according to a preset video stream transmission protocol;

[0016] A metadata analysis module, configured to calculate metadata based on the image data of the video stream; the metadata includes a maximum brightness level MaxCLL and a maximum average brightness level MaxFALL;

[0017] The brightness conversion module is used to analyze the light source target brightness of each partition based on the image data and metadata to generate a light source target brightness matrix.

[0018] In this solution, the dynamic dimming calculation module specifically includes:

[0019] The brightness interpolation module adjusts the light source target brightness matrix based on the preset bilinear interpolation algorithm;

[0020] 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.

[0021] In this solution, the distributed drive module specifically includes:

[0022] Multi-channel constant current driver chip, which transmits and receives PWM signal parameters via SPI protocol and is used to output drive current;

[0023] Differential signal routing network, the impedance of each driving current is matched to 100±2Ω.

[0024] In this solution, the intelligent feedback module specifically includes:

[0025] Drive current detection module, used to measure the real-time drive current of each partition;

[0026] The feedback controller corrects the light source PWM signal based on the real-time driving current to adjust the output driving current.

[0027] In this solution, the feedback controller further includes:

[0028] A PID controller generates an adjustment control variable based on the difference between the target drive current of the RGB LED current ratio matrix and the real-time drive current according to preset PID parameters, for correcting the light source PWM signal;

[0029] 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.

[0030] In this solution, the temperature control management module is specifically used to:

[0031] Based on the temperature sensor, the temperature value of each partition is measured in real time to build a temperature curve;

[0032] Based on the temperature curve and driving current, predict the temperature change trend of RGB LED and obtain the temperature prediction value;

[0033] According to the RGB LED temperature prediction value and the preset temperature attenuation relationship, the temperature attenuation coefficient is obtained and used to correct the light source PWM signal.

[0034] This plan also includes:

[0035] Aging database, used to store the cumulative working time of RGB LED;

[0036] 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.

[0037] This solution also includes deploying the dynamic dimming calculation module on the FPGA, specifically for:

[0038] Parallel computing engine, processing 64-bit image data simultaneously;

[0039] A compression encoder uses a preset compression algorithm to reduce the amount of transmitted data in the data matrix;

[0040] Hardware CRC check unit ensures the integrity of transmitted data.

[0041] This solution also includes an exception handling mechanism, which specifically includes:

[0042] 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;

[0043] Thermal cutoff protection: when the local temperature exceeds the preset over-temperature threshold, the current supply to the corresponding partition will be stopped;

[0044] SPI data retransmission, automatically initiates three retransmission requests after CRC check fails.

[0045] 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, adopts a distributed drive architecture to achieve refined light source adjustment; second, by dynamically analyzing image content, it adjusts the light source ratio in real time to improve the color performance range; then, through a closed-loop feedback system, it continuously monitors the driving current and adopts an adaptive correction drive strategy 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, it dynamically balances power consumption and heat dissipation requirements to ensure long-term stable operation of the system; in addition, it adopts a low-latency processing architecture to seamlessly connect video signals and backlight responses, eliminating screen tearing and strobing in dynamic scenes. Through deep collaboration between software and hardware, the present invention systematically solves the coupling problems of color gamut limitations, thermal color deviation and response delay in traditional technologies, significantly improving display performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope.

[0047] 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;

[0048] Figure 2 A schematic diagram showing a topological connection of an input signal analysis module provided by an embodiment of the present invention is shown;

[0049] Figure 3 A schematic diagram of the topological connection of the intelligent feedback module provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning 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 explicitly defined in this manner in the embodiments of the present invention.

[0052] The words "first", "second" and similar terms 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" do not indicate a quantity limitation, but rather indicate the existence of at least one. Similarly, words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" 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 do not necessarily have to be performed in exact order. On the contrary, the various steps may be processed in reverse order or simultaneously. At the same time, other operations may be added to these processes, or one or more steps may be removed from these processes.

[0053] 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.

[0054] 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.

[0055] 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:

[0056] The input signal analysis module 101 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;

[0057] Dynamic dimming calculation module 102, used to perform color analysis on image data and generate an RGB LED current ratio matrix based on the light source target brightness matrix;

[0058] The distributed driving module 103 is used to obtain PWM signals for driving each independent partition RGB light source according to the current ratio matrix, and transmit the light source PWM signals to the driving chip based on a preset communication protocol;

[0059] An intelligent feedback module 104 is configured 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;

[0060] 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.

[0061] It should be noted that the input signal analysis module receives video stream data according to a preset video data transmission protocol, such as HDMI 2.1 FRL, analyzes the video stream data frames according to the set light source modulation frequency, and obtains the image data to be displayed. The input signal analysis module analyzes the image data to determine the target brightness of the RGB LEDs in each sub-area and combines them into a light source target brightness matrix. This matrix is ​​generated based on the arrangement of the sub-area backlight modules, with each element in the matrix containing three target brightness values: red, green, and blue. The dynamic dimming calculation module performs color analysis on the image using a preset filtering algorithm, such as bilinear interpolation, to generate filtered values ​​to suppress the halo effect. The dynamic dimming calculation module then generates an RGB LED current ratio matrix based on the generated filtered values ​​and the light source target brightness matrix. The current ratio matrix includes the driving currents for the red, green, and blue lights of the backlight modules in each sub-area. Based on the current ratio matrix, the distributed driver module generates PWM signals to drive each independent sub-area RGB light source. Specifically, the distributed driver module generates corresponding PWM control signals based on the target current values ​​of each RGB LED. The distributed driver module transmits PWM control signals to the corresponding driver chip based on a preset SPI protocol, outputting a drive current that meets color rendering requirements. The intelligent feedback module is a feedback control module that measures the real-time RGB drive current of each partition in real time. Based on the deviation between the real-time drive current and the target drive current, it corrects the RGB light source PWM signal to achieve the purpose of adjusting the RGB drive current. Through real-time measurement and feedback, the drive current of the RGB LED is brought closer to the target value, thereby achieving the expected color rendering effect. The temperature control management module uses temperature sensors, such as NTC circuits and sensor chips, to measure the temperature of each partition's backlight module in real time. Since the color rendering effect of the RGB light source is affected by temperature, resulting in light decay, the temperature control management module calculates and generates a temperature attenuation coefficient in real time based on the temperature of each partition's backlight module. This is used to correct the light source PWM signal to compensate for light decay, thereby improving the color rendering effect.

[0062] Figure 2 A schematic diagram of the topological connection of an input signal analysis module provided by an embodiment of the present invention is shown.

[0063] According to an embodiment of the present invention, Figure 2 As shown, the input signal analysis module specifically includes:

[0064] The signal analysis module 201 is used to analyze and obtain image data according to a preset video stream transmission protocol;

[0065] The metadata analysis module 202 is configured to calculate metadata based on the image data of the video stream; the metadata includes a maximum brightness level MaxCLL and a maximum average brightness level MaxFALL;

[0066] The brightness conversion module 203 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.

[0067] It should be noted that the signal analysis module is used to receive and parse video stream data to obtain image data. Specifically, it receives video stream data according to a preset video data transmission protocol (such as HDMI 2.1 FRL). Then, according to the set light source modulation frequency, it analyzes the video stream data frames to obtain the image data to be displayed. The metadata analysis module is used to calculate metadata from the image data. This metadata includes the maximum brightness level (MaxCLL) and the maximum average brightness level (MaxFALL). The maximum brightness level (MaxCLL) is set based on the peak brightness value of the image. It determines the brightness level that can be achieved in the brightest part of the image and is an important reference for the display device when displaying highlights. The maximum average brightness level (MaxFALL) is the brightness level corresponding to the average of the maximum brightness of a group of images. It reflects the average peak brightness of the overall image, helping the display device to reasonably adjust and optimize the overall brightness of the image. The brightness conversion module analyzes the RGB light source target brightness corresponding to each partition in the image data, using the maximum brightness level (MaxCLL) and the maximum average brightness level (MaxFALL) as the boundaries. Combining the RGB light source target brightness of each partition with the backlight module arrangement, it generates a light source target brightness matrix corresponding to the backlight module position.

[0068] According to an embodiment of the present invention, the dynamic dimming calculation module specifically includes:

[0069] The brightness interpolation module adjusts the light source target brightness matrix based on the preset bilinear interpolation algorithm;

[0070] 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.

[0071] It should be noted that when the brightness of the RGB light sources in two adjacent subareas deviates significantly, haloing is likely to occur. Therefore, the brightness interpolation module analyzes the light source target brightness matrix and generates interpolated brightness values ​​based on a bilinear interpolation algorithm. This is used to adjust the light source target brightness matrix, thereby smoothing brightness transitions and suppressing haloing. The color analysis module uses the CIE 1931 chromaticity diagram and the light source target brightness matrix to convert brightness values ​​into RGB LED drive current values, thereby obtaining the RGB LED current ratio matrix.

[0072] According to an embodiment of the present invention, the distributed drive module specifically includes:

[0073] Multi-channel constant current driver chip, which transmits and receives PWM signal parameters via SPI protocol and is used to output drive current;

[0074] Differential signal routing network, the impedance of each driving current is matched to 100±2Ω.

[0075] It should be noted that the distributed driver module generates the corresponding PWM control signal based on the preset current signal correspondence table, that is, the current ratio matrix, to generate 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 driving current; wherein, the driver chip is a multi-channel constant current driver chip, which can output multiple channels of constant current according to the PWM signal parameters to drive different LEDs. In addition, the output signal routing of the driver chip adopts the differential signal routing network method, so as to accurately control the impedance matching of each driving current and improve the uniformity of current control.

[0076] Figure 3 A schematic diagram of the topological connection of the intelligent feedback module provided by an embodiment of the present invention is shown.

[0077] According to an embodiment of the present invention, Figure 3 As shown, the intelligent feedback module specifically includes:

[0078] A driving current detection module 301 is used to measure the real-time driving current of each partition;

[0079] The feedback controller 302 corrects the light source PWM signal based on the real-time driving current to adjust the output driving current.

[0080] It should be noted that the drive current detection module is used to measure the real-time drive current of each RGB backlight module in real time. Based on this real-time drive current, the PWM signal parameters of the multi-channel constant current driver chip are adjusted to adjust the output drive current and, in turn, the color rendering effect. The feedback controller calculates the PWM signal adjustment amount in real time based on the deviation between the real-time drive current and the target drive current, and uses it to correct the RGB light source PWM signal. Through real-time measurement and feedback control, the drive current of the RGB LED is brought closer to the target value, thereby achieving the expected color rendering effect.

[0081] According to an embodiment of the present invention, the feedback controller further includes:

[0082] A PID controller generates an adjustment control variable based on the difference between the target drive current of the RGB LED current ratio matrix and the real-time drive current according to preset PID parameters, for correcting the light source PWM signal;

[0083] 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.

[0084] 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, the proportional control quantity, the integral control quantity and / or the differential control quantity are calculated according to the above current difference; finally, the light source PWM signal is corrected according to the above control quantity, so as 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, the red light current needs to be increased by the preset red light enhancement algorithm, and the blue light current needs to be reduced based on the white balance algorithm. The specific adjustment formula is:

[0085] ;

[0086] ;

[0087] is the red light current adjustment amount;

[0088] is the red photocurrent regulation coefficient;

[0089] is the red light target current value;

[0090] is the real-time detection value of red light;

[0091] is the blue light current adjustment amount;

[0092] is the blue light current adjustment coefficient, set at Within the range.

[0093] According to an embodiment of the present invention, the temperature control management module is specifically configured to:

[0094] Based on the temperature sensor, the temperature value of each partition is measured in real time to build a temperature curve;

[0095] Based on the temperature curve and driving current, predict the temperature change trend of RGB LED and obtain the temperature prediction value;

[0096] According to the RGB LED temperature prediction value and the preset temperature attenuation relationship, the temperature attenuation coefficient is obtained and used to correct the light source PWM signal.

[0097] It should be noted that to compensate for the color rendering effect caused by the light decay of RGB LEDs due to temperature rise, the temperature control management module uses a temperature sensor to measure the temperature of each partition backlight module in real time. Based on the temperature value, a temperature attenuation coefficient is generated to correct the light source PWM signal. First, a temperature change curve is constructed based on the real-time temperature value. 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, based on the RGB LED temperature prediction value, the corresponding temperature attenuation coefficient is obtained according to a preset temperature attenuation relationship or by looking up a temperature attenuation table. This is used to correct the light source PWM, thereby reducing the light decay problem caused by temperature and improving the color rendering effect.

[0098] According to an embodiment of the present invention, the further embodiment includes:

[0099] Aging database, used to store the cumulative working time of RGB LED;

[0100] 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.

[0101] It should be noted that this system provides an aging compensation process. In this embodiment, an aging database is provided to store the cumulative operating time of each RGB LED in each partition; this cumulative operating time includes the driving current and duration. Based on the cumulative operating time of the LEDs and a preset aging light decay curve, an aging compensation coefficient is calculated to modify the light source PWM signal, thereby reducing the impact of aging light decay on the RGB LEDs and improving color rendering uniformity.

[0102] According to an embodiment of the present invention, the dynamic dimming calculation module is deployed in an FPGA, specifically configured to:

[0103] Parallel computing engine, processing 64-bit image data simultaneously;

[0104] A compression encoder uses a preset compression algorithm to reduce the amount of transmitted data in the data matrix;

[0105] Hardware CRC check unit ensures the integrity of transmitted data.

[0106] It should be noted that since the dynamic dimming calculation module needs to perform a large number of basic calculations, using conventional CPU software calculation methods will occupy a large amount of computing power resources and take a long time, which will affect the display refresh rate. 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 achieve 64-bit parallel calculation. The compression encoder uses preset compression algorithms, 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, improves the speed of CRC check value calculation to ensure the integrity of transmitted data.

[0107] According to an embodiment of the present invention, an exception handling mechanism is further included, and the exception handling mechanism specifically includes:

[0108] 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;

[0109] Thermal cutoff protection: when the local temperature exceeds the preset over-temperature threshold, the current supply to the corresponding partition will be stopped;

[0110] SPI data retransmission, automatically initiates three retransmission requests after CRC check fails.

[0111] It should be noted that this system is equipped with an exception handling mechanism to improve the safety and reliability of the system. 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, a soft shutdown is triggered to stop the current supply to 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 to the corresponding backlight module is stopped, thereby cooling down the system. Three retransmission requests are set to avoid data communication failures due to signal interference.

[0112] It is worth mentioning that it also includes:

[0113] 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.

[0114] It should be noted that this 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 a preset light intensity threshold, an ambient light intensity compensation coefficient is calculated based on the preset ambient light intensity compensation relationship. This is used to adjust the light source PWM signal, thereby reducing the impact of ambient light intensity on color rendering.

[0115] It is worth mentioning that it also includes:

[0116] 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.

[0117] It should be noted that this system provides a PID regulation model. In this embodiment, adjustments to the light source PWM signal are fed into a preset parameter adjustment neural network model to update the PID parameters of the PID controller, thereby optimizing the adjustment efficiency and 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.

[0118] 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; second, by dynamically analyzing the image content, it adjusts the light source ratio in real time to improve the color performance range; then, through the closed-loop feedback system, it continuously monitors the driving current and adopts an adaptive correction drive strategy 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, it dynamically balances power consumption and heat dissipation requirements to ensure long-term stable operation of the system; in addition, it adopts a low-latency processing architecture to seamlessly connect video signals and backlight responses, eliminating 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.

[0119] If the functions are implemented as software 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 portion that contributes to the prior art, or the portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes 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 various media capable of storing program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0120] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection 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: The 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 based on light source target brightness matrix; The dynamic dimming calculation module is deployed on the FPGA and is specifically used for: Parallel computing engine, processing 64-bit image data simultaneously; A compression encoder uses a preset compression algorithm to reduce the amount of data transmitted by the data matrix; Hardware CRC check unit to ensure the integrity of transmitted data; A distributed driving module is used to obtain PWM signals for driving each independent partition RGB light source according to the current ratio matrix, and transmit the light source PWM signals to the driving chip based on a preset communication protocol; The 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 and the real-time brightness of the light source. Specifically, it includes: Drive current detection module, used to measure the real-time drive current of each partition; A feedback controller, based on the real-time driving current, corrects the light source PWM signal to adjust the output driving current; The feedback controller also includes: A PID controller generates an adjustment control variable based on the difference between the target drive current of the RGB LED current ratio matrix and the real-time drive current according to preset PID parameters, for correcting the light source PWM signal; A red light regulator, 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, 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; 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. Specifically, it is 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 obtain the temperature prediction value; According to the RGB LED temperature prediction value and the preset temperature attenuation relationship, the temperature attenuation coefficient is obtained and used to correct the light source PWM signal.

2. A Mini LED backlight module system for improving the color gamut of a display device according to claim 1, characterized in that: The input signal analysis module specifically includes: A signal analysis module is used to parse and obtain image data according to a preset video stream transmission protocol; A metadata analysis module, configured to calculate metadata based on 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 based on the image data and metadata to generate a light source target brightness matrix.

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

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

6. The Mini LED backlight module system for improving the color gamut of a display device according to claim 1, wherein: 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 cutoff 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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