Control method of RGB matrix independent optical module

Abstract

The invention provides a control method and system for an RGB matrix independent optical module, and relates to the technical field of optical module control. Independent driving signals are provided for each lamp groove in a matrix, a reflection retaining wall is adopted to realize optical isolation of the lamp grooves, and light emitted by an LED chip is guided to be transmitted and secondarily shaped through a micro light guide type lens, so that the brightness of the LED chip is improved; and efficient and uniform light emitting is realized. And the shaped light is further guided to the display surface through the grating partition groove. The system performs partition driving on each optical module according to an input image signal, dynamically adjusts regional brightness and color output by adopting a matrix algorithm, and performs closed-loop correction on a driving signal based on a real-time sampling result, so that intelligent display control considering energy conservation and high image quality is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of optical module control, and in particular to a control method for an RGB matrix independent optical module. Background Art

[0002] Existing outdoor direct display screens generally use traditional LED lamp arrays as display units, and realize image display through densely arranged LED lamp beads. Such modules are usually composed of a large number of independent LED lamp beads, each of which is responsible for the light emission of a single pixel, and cooperates with the driving circuit to achieve color mixing and brightness adjustment. Traditional technology relies on high-density lamp bead layout to ensure display resolution, resulting in a complex internal structure of the module, and physical heat dissipation design (such as heat sinks, fans, etc.) is required to deal with the heat accumulation caused by high power consumption.

[0003] As display technology develops towards high energy efficiency, lightweight and modularization, the industry gradually explores optimizing light path distribution through optical components, reducing the number of lamp beads, and using zoned light control technology to improve energy efficiency. For example, the application of technologies such as micro light-guiding lenses, grating reflection structures and multi-chip integrated lamp beads aims to reduce module power consumption and volume while enhancing heat dissipation performance. Modular design has further become a trend, enabling rapid assembly and maintenance through standardized components, reducing manufacturing costs.

[0004] The existing technology still has significant problems: first, high-density LED lamp beads lead to high power consumption and heat generation, requiring additional heat dissipation structures, increasing module volume and cost; second, the traditional light guide structure has low light energy utilization, uneven light distribution, and is prone to halo interference; finally, the independent control of multiple lamp beads is highly complex, making it difficult to achieve precise zone dimming, affecting color levels and display effects. These problems restrict the further improvement of outdoor direct display screens in terms of energy saving, cost and image quality. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a control method for an RGB matrix independent optical module module, which can achieve intelligent display control that takes both energy saving and high image quality into consideration.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A control method for an RGB matrix independent optical module module, comprising:

[0008] Provide independent driving signals for each light trough in the matrix to light up the R, G, B three-color LED chips implanted in the light trough, and optically isolate the left and right light troughs through the reflective baffles located between adjacent light troughs;

[0009] Couple the light emitted by the LED chip into the light guide groove of the micro light guide lens disposed directly above the lamp bead from the lamp slot, and propagate it in the lens cavity;

[0010] Utilize the optical microstructure disposed on the light exit surface of the micro light guide lens to perform secondary shaping on the light entering the cavity of the micro light guide lens, so as to obtain a uniform light exit angle and brightness distribution;

[0011] Incident the shaped light onto the grating partition groove attached to the bottom and side surfaces of the lens;

[0012] According to the input image signal, perform partition driving on each independent light module in the matrix, and adopt matrix algorithm to dynamically adjust the brightness output information and color output information of each module, so as to achieve real-time energy saving and image quality optimization of the entire screen;

[0013] Perform real-time sampling on the brightness output information and color output information, and perform closed-loop correction on the independent driving signal according to the sampling result, so as to ensure the consistency and stability of the entire screen display.

[0014] Preferably, the grating partition groove is made of a reflective film with a reflectivity of 90% - 99% or a material with a reflective function, and is used to converge and change the light, so that the light is reflected to the display surface in a preset direction, thereby reducing light energy loss.

[0015] Preferably, the reflective retaining wall between each lamp slot and the adjacent lamp slot is made of white resin with a reflectivity of 85% - 98% or a plated or coated material, so as to improve the optical isolation effect and reduce light crosstalk.

[0016] Preferably, the micro light guide lens and the lamp bead are integrally formed by injection molding; the gap between the micro light guide lens and the light emitting surface of the LED chip is ≤ 0.15mm.

[0017] Preferably, the optical microstructure is a concentric ring Fresnel structure with a period of 20μm - 150μm and a depth of 5μm - 60μm.

[0018] Preferably, the steps of the matrix algorithm include:

[0019] Set the power consumption upper limit P max and the contrast threshold C thr ;

[0020] Combine the historical power consumption data of the light module to calculate the target drive current matrix I target ;

[0021] According to the target drive current matrix I target Calculate the instantaneous power consumption vector P of each light module inst ; where, P inst = Vf ×I target ; where V f is the forward voltage matrix of each optical module, and the value range is 2.4V to 3.6V;

[0022] Construct the objective function F; where, α and β are weight coefficients, α + β = 1, and the value range of α is 0.3 to 0.7, C global represents the global contrast generated by the current driving matrix, P i is the instantaneous power of the i-th optical module, and N is the total number of optical modules;

[0023] Under the constraint conditions and [C global ≥ C thr , use the iterative solution method to perform the following steps:

[0024] a. Initialize I opt = I target ; I opt is the optimized driving current matrix;

[0025] b. Calculate the current F value;

[0026] c. Adjust I_opt based on the gradient descent or simplex method, and the value range of the step size ΔI is 0.1mA to 1mA;

[0027] d. Repeat steps b to c until the change rate of F between two adjacent iterations |ΔF / F| ≤ 0.5%, or the number of iterations reaches 50 times;

[0028] Take the I opt that satisfies the constraint conditions as the final driving current matrix I final , and output it to the partition driving circuit;

[0029] Store the power consumption data and contrast data corresponding to I final in the historical database for power consumption prediction and updating of the adaptive weights α and β.

[0030] Preferably, the value range of P max is 0.6W / cm 2 to 1.2W / cm 2 , and the value range of C thr is 2000:1 to 5000:1.

[0031] Preferably, perform real-time sampling on the brightness output information and color output information, and perform closed-loop correction on the independent driving signal according to the sampling results to ensure the consistency and stability of the whole-screen display, including:

[0032] In each frame period T sInside, an optoelectronic sensor array distributed in front of each optical module is used to synchronously obtain the brightness measurement value matrix L of each optical module meas and the color trichromatic measurement matrix C meas ;

[0033] According to the pixel brightness and color requirements corresponding to the input image signal in this frame, a target brightness matrix L ref and a target color matrix C ref ;

[0034] Calculate the brightness error matrix ΔL = L ref - L meas and the color error matrix ΔC = C ref - C meas ;

[0035] Within the error limit range of |ΔL| ≤ 15%L ref , |ΔC| ≤ 10%C ref , the proportional-integral algorithm is used to obtain the current gain correction matrix K;

[0036] Based on I opt and K, calculate the drive current matrix I corr after closed-loop correction; where I corr = I opt ⊙(1 + K);

[0037] Output I corr to the independent drive channels of each optical module, and write the latest L meas , C meas , I corr and K into the historical database to provide real-time data support for the adaptive correction and power consumption prediction of subsequent sampling frames.

[0038] Preferably, the calculation formula of the current gain correction matrix K is:

[0039]

[0040] where the value range of k p is 0.05 - 0.3, the value range of k i is 0.001 - 0.02, γ is the brightness-color weight coefficient, the value range of γ is 0.2 - 0.5, t is the cumulative time from the start of closed-loop correction to the current correction moment, and K prev is the correction coefficient matrix calculated in the previous cycle.

[0041] A control system for an RGB matrix independent optical module module, comprising:

[0042] A signal driving unit for separately providing independent driving signals for each lamp slot in the matrix to light up the R, G, and B three-color LED chips implanted in the lamp slot, and optically isolating the left and right lamp slots through a reflection barrier located between adjacent lamp slots;

[0043] A light propagation unit for coupling the light emitted by the LED chip into the light guide groove of a micro light guide lens arranged directly above the lamp bead from the lamp slot and propagating in the lens cavity;

[0044] A light shaping unit for secondarily shaping the light entering the cavity of the micro light guide lens by using an optical microstructure arranged on the light exit surface of the micro light guide lens to obtain a uniform light exit angle and brightness distribution;

[0045] A light incident unit for incident the shaped light onto a grating partition slot attached to the bottom and side of the lens;

[0046] A partition driving unit for partition driving each independent light module in the matrix according to an input image signal, dynamically adjusting the brightness output information and color output information of each module by using a matrix algorithm to achieve real-time energy saving and image quality optimization of the entire screen;

[0047] A sampling correction unit for performing real-time sampling on the brightness output information and color output information and performing closed-loop correction on the independent driving signal according to the sampling result to ensure the consistency and stability of the entire screen display.

[0048] According to the specific embodiments provided by the present invention, the following technical effects are disclosed by the present invention:

[0049] The present invention provides a control method and system for an RGB matrix independent optical module. The method includes: providing independent drive signals for each lamp slot in the matrix to light the R, G, and B three-color LED chips implanted in the lamp slot, and optically isolating the left and right lamp slots through a reflection barrier located between adjacent lamp slots; coupling the light emitted by the LED chips into the light guide groove of a micro light guide lens disposed directly above the lamp beads from the lamp slot and propagating in the lens cavity; using an optical microstructure disposed on the light exit surface of the micro light guide lens to perform secondary shaping on the light entering the cavity of the micro light guide lens to obtain a uniform light exit angle and brightness distribution; making the shaped light incident on a grating partition groove attached to the bottom and side of the lens; driving each independent optical module in the matrix in a partitioned manner according to an input image signal, and dynamically adjusting the brightness output information and color output information of each module using a matrix algorithm to achieve real-time energy saving and image quality optimization of the entire screen; performing real-time sampling on the brightness output information and color output information, and performing closed-loop correction on the independent drive signal according to the sampling result to ensure the consistency and stability of the entire screen display. By introducing multi-objective optimization and closed-loop intelligent correction, the present invention realizes a display control system with high consistency, high image quality, and high energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] 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 for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0051] Figure 1 It is a flowchart of the method provided by an embodiment of the present invention;

[0052] Figure 2 It is a schematic diagram of an iterative solution method provided by an embodiment of the present invention;

[0053] Figure 3 It is a schematic diagram of the system structure provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] 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 scope of protection of the present invention.

[0055] The object of the present invention is to provide a control method and system for an RGB matrix independent optical module, which realizes a display control system with high consistency, high image quality and high energy efficiency by introducing multi-objective optimization and closed-loop intelligent correction.

[0056] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] 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 RGB matrix independent optical module, including:

[0058] Step 100: Provide independent driving signals for each lamp slot in the matrix respectively to light up the R, G, and B three-color LED chips implanted in the lamp slot, and perform optical isolation on the left and right lamp slots through the reflection retaining walls located between adjacent lamp slots;

[0059] Step 200: Couple the light emitted by the LED chip into the light guide groove of the micro light guide lens arranged directly above the lamp bead from the lamp slot, and propagate in the lens cavity;

[0060] Step 300: Use the optical microstructure arranged on the light exit surface of the micro light guide lens to perform secondary shaping on the light entering the cavity of the micro light guide lens to obtain a uniform light exit angle and brightness distribution;

[0061] Step 400: Incident the shaped light onto the grating partition groove attached to the bottom and side of the lens;

[0062] Step 500: Drive each independent optical module in the matrix according to the input image signal, and use the matrix algorithm to dynamically adjust the brightness output information and color output information of each module to achieve real-time energy saving and image quality optimization of the entire screen;

[0063] Step 600: Sample the brightness output information and color output information in real time, and perform closed-loop correction on the independent driving signal according to the sampling result to ensure the consistency and stability of the entire screen display.

[0064] Specifically, in this embodiment, a dedicated driving circuit is set for each lamp slot of the matrix display structure, so that each lamp slot can independently receive and execute the driving signal for itself. Specifically, the exclusive driving port of each lamp slot is connected to the main control board through the wiring process, and the main control board distributes different current driving parameters according to the input display signal according to the preset algorithm to achieve independent and differentiated brightness and color control of each lamp slot, so as to accurately respond to the image content requirements.

[0065] Inside each lamp slot, red, green, and blue light-emitting diode chips are implanted. Drive signals respectively control the on / off and current amplitude of the three-color chips to achieve a full-color mixed-light emission effect. By reasonably distributing and encapsulating the three-color chips in the lamp slot structure design, it ensures good light mixing effect when lit, while avoiding interference with each other, improving the color expressiveness and adjustment flexibility of the display area.

[0066] To further reduce the light crosstalk problem between adjacent lamp slots, a reflective retaining wall made of a high-reflectivity material is provided between each pair of adjacent lamp slots. This retaining wall structure runs through the extending direction of the lamp slot, and can effectively block the leakage of lateral light, ensuring that the light emission of each lamp slot only acts on the predetermined display unit area. The reflective retaining wall not only plays a role in physical optical isolation, but also improves the internal light emission efficiency of the lamp slot through its reflection characteristics, achieving a high-quality display effect under high brightness and high contrast conditions.

[0067] Preferably, the grating partition slot is made of a reflective film with a reflectivity of 90% - 99% or a material with a reflective function, and is used to converge and change light, so that the light is reflected to the display surface in a preset direction to reduce light energy loss.

[0068] Preferably, the reflective retaining wall between each lamp slot and the adjacent lamp slot is white resin with a reflectivity of 85% - 98% or a material with a coating or coating, to improve the optical isolation effect and reduce halo interference.

[0069] Preferably, the micro light guide lens and the lamp bead are integrally formed by injection molding; the gap between the micro light guide lens and the light-emitting surface of the LED chip is ≤ 0.15 mm.

[0070] Preferably, the optical microstructure is a concentric ring Fresnel structure with a period of 20 μm - 150 μm and a depth of 5 μm - 60 μm.

[0071] Specifically, in the embodiment of the present invention, first, the light-emitting diode chip is fixed at the bottom of the lamp slot, and a micro light guide lens is directly formed above the lamp bead by an injection molding integral forming process, so that the gap between the light incident end face of the lens and the light-emitting surface of the chip is controlled below 0.15 mm. The light emitted by the chip is seamlessly coupled into the light guide slot inside the lens through the refractive matching layer, realizing high-efficiency collection and introduction into the lens cavity, laying a foundation for subsequent beam shaping.

[0072] Light travels in a micro light guide lens cavity through total internal reflection and multiple refractions, and then reaches the optical microstructure area at the light exit surface of the lens. The microstructure is concentric annular Fresnel lines, with the period controlled between twenty and one hundred and fifty micrometers, and the structure depth controlled between five and sixty micrometers, and is formed in one step by ultra-precision injection molding or nanoimprinting. The Fresnel lines perform secondary shaping on the light beam, making the exit angle distribution more uniform. At the same time, grating partition grooves are provided on the inner wall of the lens, and a reflective film with a reflectivity of ninety to ninety-nine percent is deposited on the groove surface to converge the excess lateral light and reflect it to the display surface along a preset direction, significantly reducing the light energy loss.

[0073] To avoid light crosstalk between different lamp grooves, a high-reflection retaining wall is provided between adjacent lamp grooves, and the retaining wall material is selected from white resin with a reflectivity of 85% - 98% or a material with a coating or coating. The retaining wall penetrates the depth of the lamp groove, effectively shielding the lateral light, and at the same time reusing some of the scattered light through its high-reflection characteristics, improving the overall light output efficiency. In cooperation with the high-reflection grating partition grooves and Fresnel microstructure in the lens, the entire display module obtains higher brightness uniformity, lower energy loss, and better contrast while ensuring the same power consumption.

[0074] Specifically, in this embodiment, grating partition grooves with an annular or polygonal layout are pre-designed at the bottom and side of the micro light guide lens. The partition grooves are formed by injection molding with a high-precision mold, and a high-reflectivity thin film is deposited on the inner surface of the groove after molding. The shaped light travels from the lens cavity to the bottom and side walls of the lens, and can be efficiently coupled into these grating partition grooves, and is guided and locally converged according to the designed profile inside, effectively reducing the energy loss of light in the lens body and the light guide path.

[0075] The grating partition grooves further utilize their high-reflection interfaces to reflect the light incident into the grooves in an orderly manner and guide it to the light exit direction required by the display screen, improving the overall light output efficiency and uniformity. At the same time, through the partition function of the groove space, some stray or overly strong lateral light is redirected back to the main light exit area, preventing the light from leaking invalidly inside the module, and ensuring the consistency and stability of the brightness and contrast on the final display surface.

[0076] Preferably, the steps of the matrix algorithm include:

[0077] Set the power consumption upper limit P max And the contrast threshold C thr ;

[0078] Calculate the target drive current matrix I by combining the historical power consumption data of the optical module target ;

[0079] According to the target drive current matrix I target Calculate the instantaneous power consumption vector P of each optical moduleinst ; where, P inst = V f × I target ; where V f is the forward voltage matrix of each optical module, and the value range is 2.4V to 3.6V;

[0080] Construct the objective function F; where, α, β are weight coefficients, α + β = 1, and the value range of α is 0.3 to 0.7, C global represents the global contrast generated by the current driving matrix, P i is the instantaneous power of the i-th optical module, and N is the total number of optical modules;

[0081] As Figure 2 shown, under the constraint conditions and [C global ≥ C thr , use the iterative solution method to perform the following steps:

[0082] a. Initialize I opt = I target ; I opt is the optimized driving current matrix;

[0083] b. Calculate the current F value;

[0084] c. Adjust I_opt based on the gradient descent or simplex method, and the value range of the step size ΔI is 0.1mA to 1mA;

[0085] d. Repeat steps b to c until the F change rate |ΔF / F| ≤ 0.5% for two adjacent iterations, or the number of iterations reaches 50 times;

[0086] Take the I opt that satisfies the constraint conditions as the final driving current matrix I final , and output it to the partition driving circuit;

[0087] Store the power consumption data and contrast data corresponding to I final into the historical database for power consumption prediction and updating of the adaptive weights α, β.

[0088] Preferably, the value range of P max is 0.6W / cm 2 to 1.2W / cm 2 , and the value range of C thr is 2000:1 to 5000:1.

[0089] Specifically, in this embodiment, the main controller first analyzes the input image signal frame by frame, and maps the entire picture to the partitions corresponding to the physical light modules according to the preset coordinates. The analysis results include the average brightness requirement, main hue information and local dynamic contrast index of each partition. The controller calls the aforementioned matrix algorithm, combines these real-time requirements with historical power consumption and drive current boundary conditions, generates the corresponding target drive current matrix, and distributes each row of data in the matrix to the corresponding independent drive channel in real time. As a result, each light module can obtain its own current amplitude and duty cycle within the same frame time, so as to achieve accurate matching of regional brightness and color saturation.

[0090] While the light module is on, the system synchronously collects brightness and color feedback from the optical sensor and quickly compares the feedback value with the target output of this frame. When it is detected that the deviation exceeds the set threshold, the controller immediately triggers the closed-loop correction process, fine-tunes the drive current of the corresponding partition, and dynamically corrects the weight coefficient with reference to the global power consumption upper limit and contrast threshold. In this way, bright areas can maintain high contrast output, and dark areas automatically reduce the drive current, thereby achieving the goal of energy saving and picture quality; at the same time, with the help of high-speed iteration, the brightness distribution and color balance of the entire screen are always kept in the optimal state.

[0091] Preferably, the brightness output information and the color output information are sampled in real time, and the independent driving signal is closed-loop corrected according to the sampling result to ensure the consistency and stability of the whole screen display, including:

[0092] In each frame period T s The photoelectric sensor array distributed in front of each light module is used to synchronously obtain the brightness measurement value matrix L of each light module. meas And the color three-component measurement matrix C meas ;

[0093] Generate the target brightness matrix L according to the pixel brightness and color requirements of the input image signal in this frame ref and the target color matrix C ref ;

[0094] Calculate the brightness error matrix ΔL = L ref -L meas And the color error matrix ΔC=C ref -C meas ;

[0095] In the error limit |ΔL|≤15%L ref , |ΔC|≤10%C ref In the range of , the proportional-integral algorithm is used to obtain the current gain correction matrix K;

[0096] According to Iopt Calculate the drive current matrix I after closed-loop correction with K corr ; where, I corr = I opt ⊙(1 + K);

[0097] Output I corr to the independent drive channels of each optical module, and write the latest L meas , C meas , I corr and K into the historical database to provide real-time data support for the adaptive correction and power consumption prediction of subsequent sampling frames.

[0098] In an embodiment of the present invention, the control system first activates the optoelectronic sensor array within each frame period to synchronously sample the actual light output in front of each optical module, obtaining the brightness measurement matrix and the color trichromatic measurement matrix of the current frame. Subsequently, the system generates a corresponding target brightness matrix and target color matrix according to the pixel brightness and color requirements in the input image signal, ensuring that the measurement data and the target requirements are paired under the same time reference.

[0099] The main controller subtracts the measurement matrix from the target matrix element by element to obtain the brightness error matrix and the color error matrix, and implements amplitude limiting management on the error values, so that the brightness error does not exceed 15% of the target brightness, and the color error does not exceed 10% of the target color. After the error falls within the controllable range, the system calls the proportional-integral algorithm to calculate a set of current gain correction coefficient matrices, which will comprehensively consider the instantaneous error and the historical cumulative error, so as to give the optimal gain correction amount.

[0100] After obtaining the gain coefficient, the controller multiplies the reference drive current matrix optimized in the previous round by the gain correction amount channel by channel to form the drive current matrix after closed-loop correction, and immediately issues it to the independent drive channels of each optical module. At the same time, the latest brightness measurement data, color measurement data, corrected current, and gain coefficient are written into the historical database to provide real-time data support for the adaptive correction and power consumption prediction of the next frame, thus ensuring the consistency and stability of the entire screen display during long-term operation.

[0101] Preferably, the calculation formula for the current gain correction matrix K is:

[0102]

[0103] where k p has a value range of 0.05 to 0.3, k i has a value range of 0.001 to 0.02, γ is the brightness-color weight coefficient, the value range of γ is 0.2 to 0.5, t is the cumulative time from the current correction moment to the start of closed-loop correction, K prevThe correction coefficient matrix calculated for the previous cycle.

[0104] In this embodiment, the algorithm of the current gain correction matrix incorporates both luminance error and color error into the same control framework, and adds a time decay factor and the correction amount of the previous cycle to the gain term, thus simultaneously resolving the contradiction between fast convergence and steady-state oscillation suppression. Compared with the traditional single-channel proportional-integral control, this multi-component coupled gain design can maintain iterative stability even when the luminance and color deviations of the entire screen are mutually restricted, avoiding flicker or color deviation caused by local overcompensation, and has obvious creativity.

[0105] The initial values of each parameter are obtained by conducting temperature, voltage, and aging acceleration tests on the prototype: the value range of the luminance proportionality coefficient is set from 0.08 to 0.25 mA per percentage error, the color proportionality coefficient is set from 0.04 to 0.12 mA per percentage error, and the integral coefficient is determined between 0.02 and 0.1 according to the error integral curve fitting; the luminance-color weight coefficient is between 0.4 and 0.6 to ensure visual consistency; the time decay factor is taken from 0.7 to 0.95 to suppress long-term integral drift. During the operation process, based on the historical database, the controller uses the least squares fitting weighted update coefficient every 1000 frames as a cycle, and conducts a round of small-amplitude random perturbation stress test after the update to verify that it will not trigger power consumption or contrast constraints, and then writes it into the formal parameter table to achieve self-learning optimization.

[0106] Corresponding to the above method, as Figure 3 shown, this embodiment also provides a control system for an RGB matrix independent optical module, including:

[0107] A signal driving unit for respectively providing independent driving signals for each lamp slot in the matrix to light up the R, G, and B three-color LED chips implanted in the lamp slot, and optically isolating the left and right lamp slots through the reflection retaining wall located between adjacent lamp slots;

[0108] A light propagation unit for coupling the light emitted by the LED chip from the lamp slot into the light guiding slot of the micro light guiding lens arranged directly above the lamp bead and propagating in the lens cavity;

[0109] A light shaping unit for using the optical microstructure arranged on the light emitting surface of the micro light guiding lens to perform secondary shaping on the light entering the cavity of the micro light guiding lens to obtain a uniform light output angle and luminance distribution;

[0110] A light incident unit for incident the shaped light onto the grating partition slot attached to the bottom and side of the lens;

[0111] A partition driving unit is used to drive each independent optical module in the matrix according to the input image signal, and adopts a matrix algorithm to dynamically adjust the brightness output information and color output information of each module, so as to achieve real-time energy saving and picture quality optimization of the whole screen;

[0112] A sampling correction unit is used to perform real-time sampling on the brightness output information and color output information, and perform closed-loop correction on the independent driving signal according to the sampling result, so as to ensure the consistency and stability of the whole screen display.

[0113] The beneficial effects of the present invention are as follows:

[0114] (1) By real-time sampling the brightness and color output information and using a closed-loop correction mechanism, the present invention effectively eliminates the response differences and time drifts between optical modules, and realizes high consistency and long-term stability of the full-screen visual effect.

[0115] (2) The present invention adopts a multi-objective optimization algorithm to maximize the contrast and display effect of the whole screen on the premise of ensuring that the overall power consumption does not exceed the set upper limit, taking into account both energy efficiency and image quality, and meeting the requirements of high-end display scenarios.

[0116] (3) The present invention can intelligently and adaptively adjust the driving current and compensation parameters of each partition according to the changes of the input signal and environmental conditions, and significantly improve the display adaptability and detail fidelity under complex dynamic pictures.

[0117] (3) The closed-loop control and self-learning mechanism driven by historical data of the present invention not only improve the accuracy of correction, but also enhance the stable operation ability of the system to cope with long-term factors such as device aging and environmental fluctuations.

[0118] In this specification, each embodiment is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same or similar parts between each embodiment can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0119] Specific examples are used in this article to elaborate on the principle and implementation mode 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 mode and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A control method for an RGB matrix independent optical module module, characterized in that, Including: Providing independent driving signals for each light slot in the matrix to light up the R, G, and B three-color LED chips implanted in the light slot, and optically isolating the left and right light slots through the reflective partition walls located between adjacent light slots; Coupling the light emitted by the LED chips from the light slot into the light guide groove of the micro light guide lens arranged directly above the lamp beads, and propagating in the lens cavity; Using the optical microstructure arranged on the light exit surface of the micro light guide lens to perform secondary shaping on the light entering the cavity of the micro light guide lens, so as to obtain a uniform light exit angle and brightness distribution; Making the shaped light incident on the grating partition groove attached to the bottom and side of the lens; Driving each independent light module in the matrix in a partitioned manner according to the input image signal, and dynamically adjusting the brightness output information and color output information of each module by using a matrix algorithm to achieve real-time energy saving and picture quality optimization of the entire screen; Performing real-time sampling on the brightness output information and color output information, and performing closed-loop correction on the independent driving signals according to the sampling results to ensure the consistency and stability of the entire screen display; 2. The control method of the RGB matrix independent optical module according to claim 1, characterized in that, The grating partition groove is made of a reflective film with a reflectivity of 90% - 99% or a material with a reflective function, and is used to converge and change the light, so that the light is reflected to the display surface in a preset direction to reduce light energy loss.

3. The control method of the RGB matrix independent optical module according to claim 1, characterized in that, The reflective partition wall between each light slot and the adjacent light slot is made of white resin with a reflectivity of 85% - 98% or a material with a coating or coating to improve the optical isolation effect and reduce halo interference.

4. The control method of the RGB matrix independent optical module according to claim 1, characterized in that The micro light guide lens and the lamp beads are integrally formed by injection molding; the gap between the micro light guide lens and the light emitting surface of the LED chip is ≤ 0.15 mm.

5. The control method of the RGB matrix independent optical module according to claim 1, characterized in that, The optical microstructure is a concentric ring Fresnel structure with a period of 20 μm - 150 μm and a depth of 5 μm - 60 μm.

6. The control method of the RGB matrix independent optical module according to claim 1, wherein The steps of the matrix algorithm include: Set the power consumption upper limit P max and the contrast threshold C thr ; Calculate the target drive current matrix I in combination with the historical power consumption data of the optical module target ; According to the target-driven current matrix I target Calculate the instantaneous power consumption vector P of each optical module inst ; where P inst =V f ×I target ; where V f is the forward voltage matrix of each optical module, and the numerical range is 2.4V to 3.6V; Construct the objective function F; where, α and β are weight coefficients, α + β = 1, and the value range of α is 0.3 to 0.7, C global represents the global contrast generated by the current driving matrix, P i is the instantaneous power of the i-th optical module, and N is the total number of optical modules; Under the constraint conditions and [C global ≥ C thr , the following steps are performed using an iterative solution method: a. Initialize I opt = I target ; I opt is the optimized drive current matrix; b. Calculating the current F value; c. Adjusting I_opt based on the gradient descent or simplex method, and the value range of the step size ΔI is 0.1 mA - 1 mA; d. Repeating steps b - c until the change rate of F between two adjacent iterations |ΔF / F| ≤ 0.5%, or the number of iterations reaches 50 times; Take I that satisfies the constraint conditions opt as the final drive current matrix I final and output it to the partition drive circuit; Store the corresponding power consumption data and contrast data of I final into the historical database for power consumption prediction and updating of the adaptive weights α and β.

7. The control method of the RGB matrix independent optical module according to claim 6, characterized in that P max has a value range of 0.6 W / cm 2 to 1.2 W / cm 2 , and C thr has a value range of 2000:1 to 5000:

1.

8. The control method of the RGB matrix independent optical module according to claim 6, wherein Performing real-time sampling on the brightness output information and color output information, and performing closed-loop correction on the independent driving signals according to the sampling results to ensure the consistency and stability of the entire screen display, including: Within each frame period T s an optoelectronic sensor array distributed in front of each optical module is used to synchronously obtain a brightness measurement value matrix L of each optical module meas and a trichromatic color measurement matrix C meas ; Generate a target luminance matrix L based on the pixel luminance and color requirements corresponding to the input image signal in this frame ref and a target color matrix C ref ; Calculate the luminance error matrix ΔL = L ref - L meas and the color error matrix ΔC = C ref - C meas ; Within the error limit of |ΔL| ≤ 15%L ref and |ΔC| ≤ 10%C ref a current gain correction matrix K is obtained by using a proportional-integral algorithm within the range of According to I opt Calculate the drive current matrix I after closed-loop correction with K corr ; where, I corr = I opt ⊙(1 + K); Output I corr to the independent drive channels of each optical module, and write the latest L meas , C meas , I corr and K into the historical database to provide real-time data support for the adaptive correction and power consumption prediction of subsequent sampling frames.

9. The control method of the RGB matrix independent optical module according to claim 8, characterized in that, The calculation formula of the current gain correction matrix K is: where k p ranges from 0.05 to 0.3, k i ranges from 0.001 to 0.02, γ is the luminance-color weight coefficient, the value range of γ is from 0.2 to 0.5, t is the cumulative time from the current correction moment to the start of closed-loop correction, K prev is the correction coefficient matrix calculated in the previous cycle.

10. A control system for an RGB matrix independent optical module, characterized in that, Including: A signal driving unit for providing independent driving signals for each light slot in the matrix to light up the R, G, and B three-color LED chips implanted in the light slot, and optically isolating the left and right light slots through the reflective partition walls located between adjacent light slots; A light propagation unit for coupling the light emitted by the LED chips from the light slot into the light guide groove of the micro light guide lens arranged directly above the lamp beads, and propagating in the lens cavity; A light shaping unit for using the optical microstructure arranged on the light exit surface of the micro light guide lens to perform secondary shaping on the light entering the cavity of the micro light guide lens, so as to obtain a uniform light exit angle and brightness distribution; A light incident unit for incident the shaped light onto the grating partition grooves attached to the bottom and side surfaces of the lens; A partition driving unit for driving each independent optical module in the matrix according to the input image signal, and dynamically adjusting the brightness output information and color output information of each module by using a matrix algorithm to achieve real-time energy saving and picture quality optimization of the entire screen; A sampling correction unit for performing real-time sampling on the brightness output information and color output information, and performing closed-loop correction on the independent driving signal according to the sampling result to ensure the consistency and stability of the entire screen display.

Images