Control method and system for realizing independent one-area two-control optical module

Abstract

The invention provides a control method and system for realizing an independent one-area two-control optical module, and relates to the technical field of optical module control, and the method comprises the steps: receiving a sub-area brightness demand signal of a display image, and analyzing the brightness distribution data of a target area; generating a corresponding first driving signal and a corresponding second driving signal according to the brightness distribution data; the first driving signal and the second driving signal are respectively used for controlling the LED chips of the left and right independent lamp grooves in the same lamp bead; the first driving signal and the second driving signal are distributed to the corresponding LED chips through the independent control circuit, so that one-area two-control of a single lamp bead is realized; and the output light intensity of the optical module is monitored in real time, and the duty ratio or the current value of the driving signal is dynamically adjusted based on the feedback signal of the output light intensity so as to match the target brightness. The invention has remarkable technical progress and practical application value in the aspects of improving the dimming precision of the backlight partition of the display, simplifying the circuit structure, enhancing the brightness output consistency, prolonging the service life of equipment and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of optical module control, and particularly to a control method and system for an optical module that realizes independent control of two zones in one area. Background Art

[0002] Currently, the local dimming technology of the backlight module of liquid crystal displays is mainly optimized in the following ways:

[0003] Using the traditional POB (Package on Board) process, the volume of the lamp beads is reduced and the number is increased, but this leads to a significant increase in cost. Although the COB (Chip on Board) flip-chip process improves the integration degree, the complexity of the process results in a decrease in the yield rate, and new equipment needs to be invested, further increasing the cost. Adopting the "one lamp one control" design leads to a substantial increase in circuit complexity and cost. Introducing a grating groove improves the mutual interference of the backlight source halos, but the unbalanced groove design causes a conflict between the "light isolation" and "light collection" functions, forming a "cliff-like contrast" in the bright and dark areas of the backlight, affecting the uniformity of the picture.

[0004] The above methods all have significant deficiencies. They are costly (investment in lamp beads, ICs, and equipment); the complexity of the process leads to a decrease in the yield rate; the grating groove design does not balance the "light isolation" and "light collection", causing an optical drop, forming a "cliff-like contrast" in the bright and dark areas of the backlight; although the independent zone control of a single lamp bead can be achieved, it affects the picture fineness and energy efficiency.

[0005] Based on this, there is an urgent need for a control method that, without increasing the number of lamp beads and without relying on complex processes, can achieve "two controls in one area" for a single lamp bead by optimizing the optical structure and control logic, while balancing the functions of the grating groove, reducing the mutual interference of halos between optical modules, and solving the drop problem of the "cliff-like contrast" in the bright and dark areas of the backlight. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a control method and system for an optical module that realizes independent control of two zones in one area, which has significant technological progress and practical application value in aspects such as improving the partition dimming accuracy, simplifying the circuit structure, enhancing the brightness output consistency, and extending the equipment life.

[0007] To achieve the above purpose, the present invention provides the following solutions:

[0008] A control method for an optical module that realizes independent control of two zones in one area, comprising:

[0009] Receiving the partition brightness requirement signal of the display picture and parsing out the brightness distribution data of the target area;

[0010] Generate corresponding first driving signal and second driving signal according to the brightness distribution data; the first driving signal and the second driving signal are respectively used to control the LED chips in the left and right two independent lamp slots within the same lamp bead;

[0011] Distribute the first driving signal and the second driving signal to the corresponding LED chips through an independent control circuit to achieve two-zone control of a single lamp bead;

[0012] Monitor the output light intensity of the optical module in real time, and dynamically adjust the duty cycle or current value of the driving signal based on the feedback signal of the output light intensity to match the target brightness.

[0013] Preferably, receive the matrix partition brightness requirement signal of the display screen, and parse out the brightness distribution data of the target matrix area, including:

[0014] Obtain the original image signal from the display device, decode and format-standardize the image signal, extract the pixel matrix data of each frame of the picture, and obtain a standardized two-dimensional pixel matrix;

[0015] Divide the picture into multiple matrix control areas according to the physical coverage range of the optical module; each of the matrix control areas corresponds to a group of lamp beads of the backlight module; the rule for dividing the multiple matrix control areas is adaptively adjusted based on the resolution or lamp bead density;

[0016] Determine a partition mapping table according to each of the matrix control areas; the matrix partition mapping table is used to record the pixel coordinate range and lamp bead number corresponding to each matrix partition;

[0017] Traverse the pixels within each of the control areas, and extract all the pixel gray-scale values;

[0018] Based on the pixel gray-scale values, calculate the comprehensive gray-scale value of each of the control areas according to the weighted average algorithm to obtain a partition gray-scale matrix;

[0019] Map the gray-scale values of the partition gray-scale matrix to backlight brightness levels according to a preset Gamma curve;

[0020] Perform dynamic partition compensation on the backlight brightness levels in combination with the ambient light intensity data to obtain a preliminary backlight brightness distribution matrix;

[0021] Suppress the cliff-like brightness jump of the matrix module of the backlight module according to the brightness difference between adjacent partitions in the preliminary backlight brightness distribution matrix by applying Gaussian filtering or edge blurring algorithm;

[0022] In combination with the maximum light intensity limit of the optical module, dynamically compress the partition brightness in the preliminary backlight brightness distribution matrix exceeding the threshold to obtain an optimized backlight brightness distribution matrix;

[0023] Encode the optimized backlight brightness distribution matrix into a structured instruction set to obtain the brightness distribution data; the backlight brightness distribution data includes: partition number, target brightness value, dimming mode, and time synchronization mark.

[0024] Preferably, based on the pixel gray scale value, calculate the comprehensive gray scale value of each control area according to the weighted average algorithm to obtain a partition gray scale matrix, including:

[0025] Extract all pixel coordinate sets S of the k-th partition according to the partition mapping table k ; The pixel coordinate set S k The expression of is: S k ={(i, j)∣i start ≤i≤i end , j start ≤j≤j end}

[0026] Assign a weight w(i, j) to each pixel (i, j); the calculation formula of the weight w(i, j) is: where d(i, j) is the Euclidean distance from the pixel (i, j) to the partition center, and σ is a parameter for controlling the weight decay rate;

[0027] Calculate the weighted average gray scale value G of all pixels in the k-th partition k ; The calculation formula of the weighted average gray scale value G k is: where g(i, j) is the gray scale value of the pixel (i, j);

[0028] Arrange the comprehensive gray scale values G of all partitions k in physical layout to generate a partition gray scale matrix G; the expression of the partition gray scale matrix G is: where G P×Q is a matrix with dimensions P×Q.

[0029] Preferably, perform dynamic partition compensation on the backlight brightness level in combination with the ambient light intensity data to obtain a preliminary backlight brightness distribution matrix, including:

[0030] Use the ambient light sensor data to collect the ambient light intensity data in real time, and perform moving window average filtering on the ambient light intensity data to obtain the filtered data;

[0031] Normalize the filtered data to the ambient light intensity level;

[0032] Construct a dynamic partition compensation strategy; the dynamic partition compensation strategy is: when the ambient light intensity level E normWhen E < 0.3, reduce the backlight brightness to match the comfort of the human eye, and determine the brightness compensation coefficient α = 0.7; when 0.3 ≤ E norm ≤ 0.7, maintain the original brightness level, and determine α = 1.0; when E norm > 0.7, increase the brightness to enhance the visual contrast, and determine α = 1.3;

[0033] Perform compensation calculation on the original brightness level G of each matrix partition k to obtain the preliminary backlight brightness distribution matrix G' k ; The calculation formula of the preliminary backlight brightness distribution matrix is: G' k = α·G k .

[0034] Preferably, generate corresponding first driving signal and second driving signal according to the brightness distribution data, including:

[0035] Parse the brightness distribution data into a target brightness matrix, and perform Gamma inverse transformation and linear normalization processing on the target brightness value of each partition in the target brightness matrix to obtain the target current values corresponding to the left light slot and the right light slot respectively;

[0036] Calculate the duty cycle or constant current amplitude of the left and right channels respectively according to the target current values, and generate the first driving digital quantity and the second driving digital quantity;

[0037] Convert the first driving digital quantity and the second driving digital quantity into a dual-channel PWM / constant current control instruction packet through a driving encoding module to form the first driving signal and the second driving signal; where the first driving signal only contains the left light slot address information, and the second driving signal only contains the right light slot address information.

[0038] Preferably, distribute the first driving signal and the second driving signal to the corresponding LED chips through an independent control circuit to achieve one area two controls for a single lamp bead of the matrix optical module, including:

[0039] Output the first driving signal to the left light slot LED chip in the same lamp bead after passing through the left channel latch, and output the second driving signal to the right light slot LED chip in the same lamp bead after passing through the right channel latch;

[0040] Ensure that the current modulation of the left and right light slots does not affect each other through the channel isolation MOS and the overcurrent protection circuit to complete one area two controls for a single lamp bead.

[0041] Preferably, monitor the output light intensity of the optical module in real time, and dynamically adjust the duty cycle or current value of the driving signal based on the feedback signal of the output light intensity to match the target brightness, including:

[0042] A photosensitive diode is set at the light output port of the optical module to collect the light intensity of the left channel and the right channel in real time, and after A / D conversion, it is sent to the MCU;

[0043] Calculate the difference between the light intensity of the left channel, the light intensity of the right channel and the target brightness value of the corresponding partition of the target brightness matrix to obtain the brightness errors of the left and right channels;

[0044] Based on the proportional-integral closed-loop algorithm, adjust the duty cycle or constant current amplitude in the first driving signal and the second driving signal respectively to make the brightness error converge within a preset threshold, so as to dynamically match the target brightness and ensure the luminous consistency of the left and right lamp slots.

[0045] Preferably, the interval of the preset threshold is from ±2% to ±5%.

[0046] A control system for an optical module module that realizes independent one-zone two-control includes:

[0047] A distributed data parsing unit for receiving the partition brightness requirement signal of the display screen and parsing out the brightness distribution data of the target area;

[0048] A driving signal unit for generating corresponding first and second driving signals according to the brightness distribution data; the first driving signal and the second driving signal are respectively used to control the LED chips of the left and right independent lamp slots in the same lamp bead in an optical module;

[0049] A one-zone two-control unit for distributing the first driving signal and the second driving signal to the corresponding LED chips through an independent control circuit to realize one-zone two-control of a single lamp bead;

[0050] A brightness matching unit for monitoring the output light intensity of the optical module in real time and dynamically adjusting the duty cycle or current value of the driving signal based on the feedback signal of the output light intensity to match the target brightness.

[0051] According to the specific embodiments provided by the present invention, the following technical effects are disclosed by the present invention:

[0052] The present invention provides a control method and system for an optical module module that realizes independent one-zone two-control. The method includes: receiving a partition brightness requirement signal of a display screen and parsing out the brightness distribution data of a target area; generating corresponding first and second drive signals according to the brightness distribution data; the first drive signal and the second drive signal are respectively used to control the LED chips in the left and right two independent lamp slots in the same lamp bead of an optical module; distributing the first drive signal and the second drive signal to the corresponding LED chips through an independent control circuit to realize one-zone two-control of a single lamp bead optical module; real-time monitoring the output light intensity of the optical module, and dynamically adjusting the duty cycle or current value of the drive signal based on the feedback signal of the output light intensity to match the target brightness. The present invention has significant technological progress and practical application value in aspects such as improving partition dimming accuracy, simplifying circuit structure, enhancing brightness output consistency, and extending equipment life. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0054] Figure 1 It is a flowchart of the method provided by the embodiment of the present invention;

[0055] Figure 2 It is a schematic diagram of one-zone two-control of a single lamp bead provided by the embodiment of the present invention;

[0056] Figure 3 It is a schematic diagram of the system structure provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0058] The purpose of the present invention is to provide a control method and system for an optical module module that realizes independent one-zone two-control, which has significant technological progress and practical application value in aspects such as improving partition dimming accuracy, simplifying circuit structure, enhancing brightness output consistency, and extending equipment life.

[0059] To make the above objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Figure 1 The flowchart of the method provided by the embodiment of the present invention is as Figure 1 shown. The present invention provides a control method for an optical module module that realizes independent one-zone two-control, including:

[0061] Step 100: Receive the partition brightness requirement signal of the display screen and parse out the brightness distribution data of the target area;

[0062] Step 200: Generate corresponding first driving signal and second driving signal according to the brightness distribution data; the first driving signal and the second driving signal are respectively used to control the LED chips in the left and right two independent lamp slots in the same lamp bead;

[0063] Step 300: Distribute the first driving signal and the second driving signal to the corresponding LED chips through an independent control circuit to achieve one-zone two-control of a single lamp bead;

[0064] Step 400: Real-time monitor the output optical intensity of the optical module, and dynamically adjust the duty cycle or current value of the driving signal based on the feedback signal of the output optical intensity to match the target brightness.

[0065] Preferably, receiving the partition brightness requirement signal of the display screen and parsing out the brightness distribution data of the target area includes:

[0066] Obtain the original image signal from the display device, decode and standardize the format of the image signal, extract the pixel matrix data of each frame of the screen, and obtain a standardized two-dimensional pixel matrix;

[0067] Divide the screen into multiple control areas according to the physical coverage range of the optical module; each of the control areas corresponds to a group of lamp beads; the rule for dividing the multiple control areas is adaptively adjusted based on the resolution or lamp bead density;

[0068] Determine a partition mapping table according to each of the control areas; the partition mapping table is used to record the pixel coordinate range and lamp bead number corresponding to each partition;

[0069] Traverse the pixels in each of the control areas and extract all the pixel gray scale values;

[0070] Based on the pixel gray scale values, calculate the comprehensive gray scale value of each of the control areas according to the weighted average algorithm to obtain a partition gray scale matrix;

[0071] Map the gray scale values of the partition gray scale matrix to the backlight brightness level according to a preset Gamma curve;

[0072] Perform dynamic zonal compensation on the backlight brightness level in combination with the ambient light intensity data to obtain a preliminary backlight brightness distribution matrix;

[0073] According to the brightness difference between adjacent zones in the preliminary backlight brightness distribution matrix, apply Gaussian filtering or edge blurring algorithm to suppress the cliff-like brightness jump in the backlight zones;

[0074] In combination with the maximum light intensity limit of the optical module, dynamically compress the zone brightness in the preliminary backlight brightness distribution matrix that exceeds the threshold to obtain an optimized backlight brightness distribution matrix, thereby making the picture show better contrast;

[0075] Encode the optimized backlight brightness distribution matrix into a structured instruction set to obtain the brightness distribution data; the brightness distribution data includes: zone number, target brightness value, dimming mode, and time synchronization mark.

[0076] Specifically, in this embodiment, first receive the zone brightness requirement signal of the display screen as the basis for subsequent area control. Specifically, the optical module control unit establishes a data docking channel with the display device, and when the display device switches the picture or refreshes, it can accurately obtain the original image signal from the host computer. The control module decodes the received image signal and uniformly converts it into a standard format to ensure the consistency of image data from different sources or resolutions. After being standardized, the system extracts all pixel points of the current frame of the picture to form a two-dimensional pixel matrix, providing a complete pixel data basis for subsequent fine control.

[0077] To accurately adapt to the illumination ability of the actual optical module, in this embodiment, the entire picture is adaptively divided into multiple control areas according to the physical coverage range of the optical module. The area division method can be based on the resolution parameters of the display screen or dynamically adjusted according to the actual density of the lamp bead arrangement to ensure that the light output of each area can highly match the pixel requirements. Each control area corresponds to a specific group of lamp beads to achieve hierarchical management. Subsequently, the system automatically generates a zone mapping table, which details the pixel coordinate range covered by each zone and its corresponding lamp bead number, providing a strict mapping basis for subsequent zone-level brightness data pushing and lamp bead control.

[0078] In each control area of this embodiment, all pixel points included in the area are traversed one by one, and the overall gray scale distribution information of the current sub-area is extracted according to the gray scale value of the pixel points. Then, a weighted average algorithm is used to evaluate the brightness, that is, the gray scale information of each pixel is comprehensively processed in combination with factors such as the position weight of the pixel in the area and the color type, so as to obtain the comprehensive gray scale value of each control area. The comprehensive gray scale values of all control areas are summarized to form a zonal gray scale matrix, laying a data foundation for the accurate mapping of the brightness level.

[0079] After obtaining the partition grayscale matrix, in this embodiment, through a preset Gamma curve, the comprehensive grayscale value of each partition is mapped to the corresponding backlight brightness level to adapt to the human eye visual characteristics and actual display requirements. At the same time, combining the ambient light intensity data collected on-site, the generated backlight brightness levels are dynamically partition-compensated in real time to ensure a constant picture brightness output in different environments. Subsequently, the system specifically processes the brightness difference between adjacent partitions in the preliminary backlight brightness distribution matrix, and uses Gaussian filtering or edge blur algorithms to implement smooth transitions at the partition junctions to eliminate potential cliff-like brightness jumps in the backlight partitions, thereby overall improving the uniformity and naturalness of the display effect.

[0080] After the brightness compensation and transition optimization are completed, this embodiment also needs to comply with the maximum light intensity constraint of the optical module hardware, dynamically compress the preliminary backlight brightness distribution matrix, and limit the partition brightness values exceeding the hardware limit within a safe range to ensure the safe and reliable operation of the system. Finally, the system encodes the optimized brightness distribution matrix into a structured instruction set, in which the number, target brightness value, dimming mode used, and time synchronization mark and other relevant information of each partition are clearly marked. This data set is the complete brightness distribution data, which is directly pushed to the downstream control logic as the basic data for precise light control in each area of the optical module, providing a full-process and implementable technical means for realizing high-consistency and high-responsiveness regional independent brightness adjustment.

[0081] Preferably, based on the pixel grayscale values, the comprehensive grayscale values of the control areas are calculated according to the weighted average algorithm to obtain a partition grayscale matrix, including:

[0082] Extract all pixel coordinate sets S of the k-th partition according to the partition mapping table k ; The pixel coordinate set S k The expression of is: S k ={(i,j)∣i start ≤i≤i end ,j start ≤j≤j end}

[0083] Assign a weight w(i,j) to each pixel (i,j); the calculation formula of the weight w(i,j) is: where d(i,j) is the Euclidean distance from the pixel (i,j) to the partition center, and σ is a parameter controlling the weight decay rate;

[0084] Calculate the weighted average grayscale value G of all pixels in the k-th partition k ; The calculation formula of the weighted average grayscale value G k is: Among them, g(i, j) is the gray scale value of the pixel (i, j);

[0085] The comprehensive gray scale value G of all partitions k is arranged according to the physical layout to generate a partition gray scale matrix G; the expression of the partition gray scale matrix G is: where G P×Q is a matrix with dimensions P×Q.

[0086] Specifically, in this embodiment, in order to calculate the comprehensive gray scale value of each control area, first, according to the pre-set partition mapping table, all pixel coordinates within each partition are extracted in sequence. Whenever the k-th partition is processed, the system will automatically retrieve the pixel range corresponding to this partition in the mapping table, so as to obtain the coordinates of all pixel points within this partition that belong to the current mapping area, and organize these coordinates into an independent set. This can ensure that in subsequent processing, each pixel in each partition can be accurately identified and accessed.

[0087] Subsequently, this embodiment needs to assign weights to each pixel within this partition. The weight assignment is based on the Euclidean distance from the pixel point to the center point of the partition. Usually, pixels closer to the center are given higher weights. For this purpose, the system first determines the geometric center coordinates of each partition, and then calculates the distance from each pixel to this center point in sequence. By setting an adjustable parameter, the weights corresponding to pixels with a longer distance are attenuated, so that the weights show a distribution pattern that is high in the center and gradually decreases outward. This parameter can be flexibly set according to the actual dimming requirements to adapt to the adjustment requirements of different display precisions and light efficiency uniformities.

[0088] After the weight assignment is completed, in each partition of this embodiment, a weighted average process is performed on the gray scale values of all pixels. The specific operation of this process is to multiply the gray scale value extracted for each pixel by its corresponding weight respectively, accumulate all the weighted gray scale values in sequence, and then divide the result by the sum of all weights within the partition. Through this weighted average method, the interference of edge pixels caused by simple averaging can be effectively avoided, ensuring that the final comprehensive gray scale value of the partition is closer to the visual center of gravity, and at the same time is more representative and has a basis for dimming.

[0089] After the weighted average gray scale values of all partitions are calculated, this embodiment will fill the comprehensive gray scale value of each partition into a unified matrix in sequence according to its physical arrangement in the optical module. When the optical module is arranged two-dimensionally, this matrix is organized by rows and columns according to the actual physical distribution of the control areas, and each cell corresponds to the comprehensive gray scale value of a specific partition in sequence. The generated partition gray scale matrix can completely reflect the gray scale distribution of the current entire picture in the corresponding physical space.

[0090] Finally, the partition grayscale matrix will serve as the direct input data for downstream brightness mapping and driving algorithms, participating in a series of image enhancement and backlight modulation processes such as Gamma correction, brightness compensation, and blur smoothing. Through this method, not only can the delicate restoration of the picture grayscale be achieved at the partition level, but also the accuracy of grayscale calculation within the partition area and the consistency of regional brightness regulation can be effectively improved, thus realizing high-quality dynamic partition control of regional backlight and bringing higher performance and better picture experience to the image display system.

[0091] Preferably, the backlight brightness level is dynamically partition-compensated in combination with the ambient light intensity data to obtain a preliminary backlight brightness distribution matrix, including:

[0092] Use the ambient light sensor data to collect the ambient light intensity data in real time, and perform sliding window average filtering on the ambient light intensity data to obtain the filtered data;

[0093] Normalize the filtered data to the ambient light intensity level;

[0094] Construct a dynamic partition compensation strategy; the dynamic partition compensation strategy is: when the ambient light intensity level E norm <0.3, reduce the backlight brightness to match the human eye comfort, and determine the brightness compensation coefficient α = 0.7; when 0.3 ≤ E norm ≤0.7, maintain the original brightness level, and determine α = 1.0; when E norm >0.7, increase the brightness to enhance visibility, and determine α = 1.3;

[0095] Perform compensation calculation on the original brightness level G k of each partition to obtain a preliminary backlight brightness distribution matrix G' k ; the calculation formula of the preliminary backlight brightness distribution matrix is: G' k =α·G k .

[0096] Specifically, in this embodiment, first, the ambient light intensity data in the current usage environment is collected in real time through the ambient light sensor integrated in the terminal device. To eliminate sudden external light interference and short-term random fluctuations, the system uses the sliding window average filtering method to perform multi-point average processing on the original ambient light intensity data continuously collected within a certain time range. The filtered ambient light intensity data obtained by this method can more stably and accurately reflect the true ambient illumination level.

[0097] For the obtained filtered ambient light intensity data, this embodiment further performs normalization processing. Specifically, the measured ambient light intensity values are mapped into a series of graded ambient light intensity levels in accordance with the normalization principle, in combination with the minimum and maximum illuminance standard ranges preset by the device. Usually, the ambient light intensity levels are divided into three ranges: low, medium, and high. Each level corresponds to a different type of lighting environment, facilitating subsequent targeted adjustment of the backlight output by the dynamic zoning compensation algorithm.

[0098] After the ambient light levels are divided, this embodiment formulates corresponding dynamic brightness compensation strategies according to different levels. If the ambient light intensity level is low, that is, when the environment is dim, the system will actively reduce the preset backlight brightness to reduce the irritation of strong light to the human eye, which not only improves the viewing comfort but also has an energy-saving effect. If the ambient light intensity level is at a medium level, the system maintains the original brightness level of the screen backlight without compensation to ensure normal and clear display effects. When the ambient light intensity level is high, that is, when the environment suddenly brightens, the system correspondingly increases the backlight brightness to ensure that the screen image still has good readability under strong light. Each of the above levels corresponds one-to-one with a specific brightness compensation coefficient, which is automatically matched and applied by the control algorithm.

[0099] Subsequently, for the original brightness level of each partition, this embodiment selects a matching brightness compensation coefficient according to the ambient light intensity level it is in and adjusts the original brightness level. The specific method is to perform a multiplication calculation on the original brightness level of each area and the corresponding compensation coefficient according to the set rules, that is, adopt value ranges such as reduction, maintenance, or increase according to the selected level to achieve personalized dynamic correction of the partition brightness. This ensures that even under the same display screen, the partition backlight brightness can be adaptively adjusted in real time under different external environmental conditions, greatly improving visual comfort and scene adaptability.

[0100] After being processed by the above compensation steps, this embodiment uniformly arranges the final brightness level information of each control partition and generates a preliminary backlight brightness distribution matrix according to its spatial arrangement. This matrix comprehensively reflects the backlight brightness distribution pattern after combining ambient light intensity compensation and serves as the basic data for downstream brightness optimization and drive signal generation, ensuring that each partition can output the optimal target brightness level matching the current ambient light conditions and providing sufficient and accurate input for subsequent brightness smoothing and safety control.

[0101] Preferably, generating corresponding first drive signal and second drive signal according to the brightness distribution data includes:

[0102] Parse the brightness distribution data into a target brightness matrix, and perform Gamma inverse transformation and linear normalization processing on the target brightness values of each partition light module in the target brightness matrix to obtain the target current values corresponding to the left light slot and the right light slot respectively;

[0103] Calculate the duty cycle or constant current amplitude of the left and right channels respectively according to the target current values, and generate a first driving digital quantity and a second driving digital quantity;

[0104] Convert the first driving digital quantity and the second driving digital quantity into a dual-channel PWM / constant current control instruction packet through a driving coding module to form a first driving signal and a second driving signal; wherein the first driving signal only contains the address information of the left light slot, and the second driving signal only contains the address information of the right light slot.

[0105] Specifically, in this embodiment, first receive the brightness distribution data output by the upstream data processing module. The control module performs structured parsing on this data and restores it to a target brightness matrix covering all control partitions. Subsequently, for the target brightness values in each light module partition of the target brightness matrix, perform Gamma inverse transformation processing that matches the preset brightness characteristics of the display system. Through Gamma inverse transformation, convert the input brightness data based on the non-linear perception of the human eye into a linear brightness value suitable for driving the LED chip, ensuring the precise control of subsequent current output. Then perform normalization processing on the above linear brightness value to make it fall within the standard current control range, thereby ensuring the consistency and reliability of all partition parameters. In this process, the left light slot and the right light slot sequentially determine their respective independent target brightness outputs and obtain a set of independent target current values respectively.

[0106] Optionally, after obtaining the target current values, this embodiment calculates the required driving parameters for the left light slot and the right light slot respectively around the dual-channel structure. Here, in this embodiment, according to the actual driving scheme adopted, a pulse width signal input modulated by the duty cycle or a current control method characterized by a constant current amplitude is selected on the left and right channels respectively. Perform proportional conversion of the respective target current values with the preset maximum driving parameters to obtain the first driving digital quantity of the left channel (i.e., the left light slot) and the second driving digital quantity of the right channel (i.e., the right light slot). This digital quantity is directly related to the required output current and is the core basis for the subsequent generation of the driving signal.

[0107] Subsequently, in this embodiment, the obtained first and second driving digital quantities are input into the driving encoding module. The driving encoding module has a built-in dedicated algorithm that can perform channel-by-channel processing on digital signals of different channels, and convert each digital quantity into a control instruction packet in a standard format. For each channel, the encoding module automatically generates corresponding PWM pulse-type or constant-current output-type driving information according to the set output protocol, supporting synchronous control and timing optimization. In this way, the first driving signal output by the left channel and the second driving signal output by the right channel are both formatted and encapsulated according to the requirements of the driving IC and the module interface, realizing the distribution of integrated dimming content.

[0108] During the generation of the driving signal, in order to achieve fine regulation of the micro-regions at the lamp bead level, this embodiment specifically sets up a signal address isolation mechanism. When the encoding module outputs the instruction packet, it embeds the address information of the left lamp slot and the right lamp slot into the corresponding signal streams respectively. The first driving signal only contains the physical control unit address, channel number, and instruction parameters of the left lamp slot, and does not contain the relevant information of the right lamp slot. The second driving signal is completely independent and only contains the right lamp slot channel and its parameters. In this way, the two physical regions of the same lamp bead in one module can truly receive driving instructions independently of each other, avoiding interference with each other.

[0109] Finally, this embodiment pushes the formed first driving signal and second driving signal to the downstream dual-channel driving integrated circuit, and each path is transmitted to the target LED chip through independent control lines. After receiving the corresponding signal, the driving IC can adjust the output current or PWM duty cycle to precisely control the brightness output of the left and right lamp slots within the same lamp bead. Through this method, it is possible to achieve completely independent zone dimming at the single lamp bead level, improve the fineness of zone control of the entire screen image, and lay a technical foundation for the precise control of high-resolution backlight systems.

[0110] Preferably, as Figure 2 shown, in this embodiment, the first driving signal and the second driving signal are distributed to the corresponding LED chips through an independent control circuit to achieve two controls for one zone of a single lamp bead, including:

[0111] Output the first driving signal to the left lamp slot LED chip within the same lamp bead after passing through the left channel latch, and output the second driving signal to the right lamp slot LED chip within the same lamp bead after passing through the right channel latch;

[0112] Ensure that the current modulation of the left and right lamp slots does not affect each other through the channel isolation MOS and the overcurrent protection circuit to complete two controls for one zone of a single lamp bead.

[0113] Specifically, in this embodiment, in order to achieve independent brightness control for the left and right lamp slots within the same lamp bead, a dual-channel independent control circuit architecture is adopted. This circuit has two completely isolated signal transmission and processing paths, corresponding to the left lamp slot and the right lamp slot respectively. After the system receives the first driving signal and the second driving signal output by the upstream control module, they are introduced into the independent control circuit through physical wiring, ensuring that each signal is clearly and interference-free transmitted to its respective dedicated circuit branch, laying a good foundation for subsequent independent dimming control.

[0114] In the signal distribution link, the control circuit is respectively provided with a left-channel latch and a right-channel latch. The left-channel latch is specifically used to receive and temporarily store the first driving signal, and stably output the signal to the LED chip of the left lamp slot within the same lamp bead at an appropriate moment. Similarly, the right-channel latch processes the second driving signal and outputs it efficiently and accurately to the LED chip of the right lamp slot. Through the buffering and locking functions of the latch, the timing jitter and noise interference in the signal transmission process can be effectively eliminated, ensuring that the two signals act stably and independently on their respective lamp slots in different working cycles.

[0115] To prevent mutual coupling or crosstalk during the dimming process of the left and right lamp slots, the independent control circuit is provided with channel isolation MOS transistors at key positions in each channel. The left lamp slot signal path is configured with a dedicated isolation MOS transistor, allowing only the left-channel signal to pass through. The right lamp slot path is configured with its own isolation MOS transistor in the same way. The introduction of MOS transistors ensures that when there is a driving action or a change in the dimming current in any channel, the other channel is always in an electrically isolated state, avoiding signal or current backflow and preventing unwanted interactive effects between the left and right LED chips within the same lamp bead.

[0116] In addition to channel isolation, the independent control circuit also serially designs an overcurrent protection circuit in each signal and current output path. The overcurrent protection module is mainly used to monitor the current value passing through the LED chip in real time. When it detects that the driving current of a certain path abnormally increases or exceeds the predetermined safety threshold, the protection circuit can immediately cut off the current output of this channel or limit the current to a safe level, thus effectively avoiding damage to the LED chip due to overload. In addition, the overcurrent protection measure further enhances the independence of the left and right channel partition control and the overall safety and reliability of the system.

[0117] Based on the above design, in this embodiment, through the coordinated cooperation of the left and right channel latches, channel isolation MOS, and overcurrent protection circuit, the first driving signal and the second driving signal can be accurately and safely distributed to the left and right LED chips in the same lamp bead respectively, realizing true two-channel control of a single lamp bead in one optical module. This solution not only greatly improves the flexibility and fineness of zonal dimming, but also effectively prevents channel interference and hardware damage, providing strong technical support for high-end backlight modules and fine display systems.

[0118] Preferably, the output light intensity of the optical module is monitored in real time, and the duty cycle or current value of the driving signal is dynamically adjusted based on the feedback signal of the output light intensity to match the target brightness, including:

[0119] A photosensitive diode is arranged at the light output port of the optical module to collect the left-channel light intensity and the right-channel light intensity in real time, and after A / D conversion, it is sent to the MCU;

[0120] The difference between the left-channel light intensity, the right-channel light intensity and the target brightness value of the target brightness matrix corresponding to the partition is calculated to obtain the brightness errors of the left and right channels;

[0121] Based on the proportional-integral closed-loop algorithm, the duty cycle or constant current amplitude in the first driving signal and the second driving signal is adjusted respectively to make the brightness error converge within a preset threshold, so as to dynamically match the target brightness and ensure the luminous consistency of the left and right lamp slots.

[0122] Specifically, in this embodiment, to achieve dynamic closed-loop control of light output, highly sensitive photosensitive diodes are installed at the light output ports of each optical module. Sensors are respectively arranged at the fronts of the left lamp slot and the right lamp slot to sense the actual light output intensity of the corresponding area in real time. The detected analog light intensity signal is preliminarily amplified and processed by a signal conditioning circuit to filter out noise, and then converted into a digital signal by an analog-to-digital converter. This digital signal is then transmitted to the microcontroller unit MCU in real time to provide accurate and real-time basic data for the subsequent feedback adjustment process.

[0123] After the MCU receives the left-channel and right-channel light intensity values measured by the photosensitive diode, it will respectively read the target brightness values of the corresponding partitions in the current frame in the target brightness matrix. Subsequently, the system calculates the difference between the actually detected left and right channel brightness and the expected target brightness according to the established data structure, so as to obtain the brightness error data of each channel. This error metric intuitively reflects the deviation between the current output brightness and the required target, laying a data foundation for automatic compensation control.

[0124] For the luminance error generated for each channel, in this embodiment, a proportional-integral closed-loop regulation algorithm is deployed in the MCU. By continuously accumulating and evaluating the current and historical error information, the corresponding drive control parameters are automatically adjusted. For the PWM drive mode, the system intelligently adjusts the duty cycle of each path to increase or decrease the ratio of the light-emitting time of the LED; for the constant-current drive mode, the reference amplitude of the drive current is directly adjusted to track the target luminance. The entire regulation process depends entirely on the feedback of the real-time error signal, minimizing human intervention and achieving adaptive dynamic matching.

[0125] During the regulation process, the proportional-integral algorithm ensures both a rapid response to the luminance error and the elimination of long-term deviations. Whenever this embodiment detects that the light output of a certain path deviates from the target luminance, the closed-loop algorithm can intelligently determine the adjustment amplitude and rate required, and synchronously apply the adjustment result to the corresponding first or second drive signal. Through multi-cycle continuous regulation and feedback, this embodiment can quickly converge the luminance error until it approaches and stabilizes within the set expected threshold, preventing problems such as flickering and obvious luminance inconsistency caused by dynamic changes.

[0126] Finally, through real-time closed-loop monitoring, differential feedback calculation, proportional-integral dynamic regulation linked with high-frequency drive signals, this embodiment realizes that the output light intensities of the left and right light slots within the same lamp bead can be accurately matched to their respective target luminances. This method can eliminate luminance drift caused by production, aging, or environmental impacts, ensure a high degree of consistency in the light-emitting effects of the left and right light slots, greatly improve the image uniformity and reliability of multi-zone backlight modules in high-end display application scenarios, and provide a practical route for realizing intelligent regional backlight control in complex scenarios.

[0127] Preferably, the range of the preset threshold is from ±2% to ±5%.

[0128] Corresponding to the above method, as Figure 3 shown, this embodiment also provides a control system for an optical module module that realizes independent one-zone two-control, including:

[0129] A distributed data parsing unit, configured to receive the partition luminance requirement signal of the display screen and parse out the luminance distribution data of the target area;

[0130] A drive signal unit, configured to generate corresponding first and second drive signals according to the luminance distribution data; the first drive signal and the second drive signal are respectively used to control the LED chips of the left and right two independent light slots within the same lamp bead in an optical module;

[0131] A one-zone two-control unit, configured to distribute the first drive signal and the second drive signal to the corresponding LED chips through an independent control circuit to realize one-zone two-control of a single lamp bead;

[0132] A brightness matching unit for real - time monitoring of the output optical intensity of an optical module, and dynamically adjusting the duty cycle or current value of a drive signal based on a feedback signal of the output optical intensity to match a target brightness.

[0133] The beneficial effects of the present invention are as follows:

[0134] (1) By realizing independent control of two independent lamp slots on the left and right inside the same lamp bead, the present invention breaks through the limitation that traditional backlight modules cannot be subdivided for dimming with "one - lamp - one - control" or "one - area - one - control", effectively improving the dimming accuracy of picture zoning, and enhancing the fineness and layering of the display picture.

[0135] (2) The present invention adopts a dual - channel constant - current drive integrated circuit, combined with an independent control circuit structure, to achieve non - interfering distribution and precise control of LED chips in the left and right lamp slots within the same lamp bead, greatly reducing the circuit complexity and cost of the system, and being beneficial to structural integration and wiring optimization.

[0136] (3) By real - time monitoring of the output optical intensity of the optical module and dynamically adjusting the duty cycle or current value of the drive signal based on the feedback signal, the present invention realizes closed - loop steady - state dimming, effectively improving the accuracy and consistency of brightness output, and ensuring the uniformity and stability of the display effect.

[0137] (4) The present invention adopts an adaptive brightness adjustment and dynamic zoning compensation algorithm, which can perform fine brightness adjustment according to ambient light and actual feedback, further extending the life of LED chips, avoiding light source overload, and improving the use reliability and energy - saving performance of the device.

[0138] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0139] Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A control method for an optical module module that realizes independent control of two zones in one area, characterized in that, Including: Receiving a partition brightness requirement signal of a display screen and parsing luminance distribution data of a target area; Generating corresponding first and second drive signals according to the luminance distribution data; the first drive signal and the second drive signal are respectively used to control LED chips forming two independent lamp slots on the left and right in the same lamp bead; Distributing the first drive signal and the second drive signal to corresponding LED chips through an independent control circuit to achieve two-zone control of a single lamp bead; Real-time monitoring the output light intensity of an optical module and dynamically adjusting the duty cycle or current value of the drive signal based on a feedback signal of the output light intensity to match the target brightness.

2. The control method of the optical module module for realizing independent one-zone two-control according to claim 1, characterized in that, Receiving a partition brightness requirement signal of a display screen and parsing luminance distribution data of a target area, including: Obtaining an original image signal from a display device, decoding and format-normalizing the image signal, extracting pixel matrix data of each frame of the screen, and obtaining a normalized two-dimensional pixel matrix; Dividing the screen into multiple matrix control areas according to the physical coverage range of the optical module; each matrix control area corresponds to a group of lamp beads; the rule for dividing the multiple matrix control areas is adaptively adjusted based on the resolution or lamp bead density; Determining a partition mapping table according to each matrix control area; the partition mapping table is used to record the pixel coordinate range and lamp bead number corresponding to each partition; Traversing the pixels in each control area and extracting all pixel gray-scale values; Based on the pixel gray-scale values, calculating the comprehensive gray-scale value of each control area according to a weighted average algorithm to obtain a partition gray-scale matrix; mapping the gray-scale values of the partition gray-scale matrix to backlight brightness levels according to a preset Gamma curve; dynamically compensating the backlight brightness levels in combination with ambient light intensity data to obtain a preliminary backlight luminance distribution matrix; Suppressing cliff-like luminance jumps in the matrix module according to the luminance difference between adjacent partitions in the preliminary backlight luminance distribution matrix by applying Gaussian filtering or edge blurring algorithm; Dynamically compressing the partition luminance in the preliminary backlight luminance distribution matrix exceeding the threshold in combination with the maximum light intensity limit of the optical module to obtain an optimized backlight luminance distribution matrix; Encoding the optimized backlight luminance distribution matrix into a structured instruction set to obtain the backlight luminance distribution data; the backlight luminance distribution data includes: partition number, target luminance value, dimming mode, and time synchronization mark.

3. The control method of the optical module module for realizing independent one-zone two-control according to claim 2, wherein, Based on the pixel gray-scale values, calculating the comprehensive gray-scale value of each control area according to a weighted average algorithm to obtain a partition gray-scale matrix, including: Extract all pixel coordinate sets S of the k-th partition according to the partition mapping table k ; The pixel coordinate set S k The expression of is: S k ={(i,j)|∣i start ≤i≤i end ,j start ≤j≤j end} Assign a weight w(i, j) to each pixel (i, j); the calculation formula for the weight w(i, j) is as follows: where d(i, j) is the Euclidean distance from the pixel (i, j) to the center of the partition, and σ is a parameter that controls the rate of weight decay; Calculate the weighted average gray scale value G for all pixels within the k-th partition k ; The weighted average gray scale value G k is calculated by the formula: where g(i,j) is the gray scale value of the pixel (i,j); The comprehensive gray scale value G of all partitions k is arranged according to the physical layout to generate a partition gray scale matrix G; the expression of the partition gray scale matrix G is where G P×Q is a matrix of dimension P×Q.

4. The control method of the optical module module for realizing independent one-zone two-control according to claim 1, characterized in that, Dynamically compensating the backlight brightness levels in combination with ambient light intensity data to obtain a preliminary backlight luminance distribution matrix, including: Using ambient light sensor data to collect the ambient light intensity data in real time and performing sliding window average filtering on the ambient light intensity data to obtain filtered data; Normalizing the filtered data into ambient light intensity levels; Construct a dynamic partition compensation strategy; the dynamic partition compensation strategy is as follows: when the environmental light intensity level E norm < 0.3, reduce the backlight brightness to match the comfort of the human eye, and determine the brightness compensation coefficient α = 0.7; when 0.3 ≤ E norm ≤ 0.7, maintain the original brightness level, and determine α = 1.0; when E norm > 0.7, increase the brightness to enhance the visual contrast, and determine α = 1.3; For the original brightness level G of each partition k perform compensation calculation to obtain the preliminary backlight brightness distribution matrix G' k ; The calculation formula of the preliminary backlight brightness distribution matrix is: G' k = α·G k .

5. The control method of the optical module module for realizing independent one-zone two-control according to claim 1, characterized in that, Generating corresponding first and second drive signals according to the luminance distribution data, including: Parse the brightness distribution data into a target brightness matrix, and perform Gamma inverse transformation and linear normalization processing on the target brightness value of each partition in the target brightness matrix to obtain the target current values corresponding to the left light slot and the right light slot respectively; Calculate the duty cycles or constant current amplitudes of the left and right channels respectively according to the target current values, and generate a first drive digital quantity and a second drive digital quantity; Convert the first drive digital quantity and the second drive digital quantity into a dual-channel PWM / constant current control instruction packet through a drive coding module to form a first drive signal and a second drive signal; wherein the first drive signal only contains the address information of the left light slot, and the second drive signal only contains the address information of the right light slot.

6. The control method of the matrix optical module module for realizing independent one-zone two-control according to claim 1, characterized in that, Allocate the first drive signal and the second drive signal to the corresponding LED chips through an independent control circuit to realize the one-region two-control of a single lamp bead of the matrix light module, including: Output the first drive signal to the left light slot LED chip in the same lamp bead after passing through the left channel latch, and output the second drive signal to the right light slot LED chip in the same lamp bead after passing through the right channel latch; Ensure that the current modulation of the left and right light slots does not affect each other through the channel isolation MOS and the overcurrent protection circuit to complete the one-region two-control of a single lamp bead.

7. The control method of the optical module module for realizing independent one-zone two-control according to claim 5, wherein, Monitor the output light intensity of the light module in real time, and dynamically adjust the duty cycle or current value of the drive signal based on the feedback signal of the output light intensity to match the target brightness, including: Set a photosensitive diode at the light output port of the light module, collect the light intensity of the left channel and the right channel in real time, and send it to the MCU after A / D conversion; Calculate the difference between the light intensity of the left channel, the light intensity of the right channel and the target brightness value of the corresponding partition of the target brightness matrix to obtain the brightness errors of the left and right channels; Adjust the duty cycle or constant current amplitude in the first drive signal and the second drive signal respectively based on the proportional-integral closed-loop algorithm to make the brightness error converge within a preset threshold, so as to dynamically match the target brightness and ensure the luminous consistency of the left and right light slots.

8. The control method of the optical module module for realizing independent one-zone two-control according to claim 7, characterized in that, The interval of the preset threshold is ±2% to ±5%.

9. A control system for a matrix optical module module that realizes independent control of two zones in one area, characterized in that, Including: A distribution data parsing unit, which is used to receive the partition brightness requirement signal of the display screen and parse out the backlight brightness distribution data of the target area; A drive signal unit, which is used to generate corresponding first drive signals and second drive signals according to the brightness distribution data; the first drive signal and the second drive signal are respectively used to control the LED chips of the left and right two independent light slots in the same lamp bead; A one-region two-control unit, which is used to allocate the first drive signal and the second drive signal to the corresponding LED chips through an independent control circuit to realize the one-region two-control of a single lamp bead of the matrix light module; A brightness matching unit, which is used to monitor the output light intensity of the light module in real time, and dynamically adjust the duty cycle or current value of the drive signal based on the feedback signal of the output light intensity to match the target brightness.

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