An LED display screen correction method, device and readable storage medium

Abstract

The application provides an LED display screen correction method, device and readable storage medium, and belongs to the field of LED display screen correction; solves the technical problem of low correction accuracy of the existing LED display screen; the technical scheme is that initial data, ink color data, brightness data and chroma data of an LED module are collected in an LED display screen factory, the initial data, ink color data, brightness data and quantitatively analyzed ink color data are uploaded to a Flash storage unit, the LED module is graded according to the quantitatively analyzed ink color data, the LED modules of the same gear are placed together and are marked correspondingly, the same LED display screen is built by the LED modules of the same gear, the brightness data, chroma data and ink color data of the multiple LED modules of the same LED display screen are read back, a correction coefficient is generated after analysis and processing by a fusion algorithm, the LED display screen is corrected based on the correction coefficient, the corrected data is used to generate a whole screen coefficient, and the whole screen coefficient is uploaded to the Flash storage unit and is solidified; the application is applied to the LED display screen.

Description

TECHNICAL FIELD

[0001] The application provides an LED display screen correction method and device and a readable storage medium, and belongs to the technical field of LED display screen correction. BACKGROUND

[0002] An LED display screen is usually composed of a plurality of LED modules, and each LED module is installed with a plurality of LED light points. When the size of the LED display screen is large, the display color and brightness of the LED display screen are not uniform, and the display effect is poor. Therefore, the LED display screen needs to be corrected. However, the existing LED display screen correction method has the following problems.

[0003] 1. Influenced by environmental factors such as temperature, humidity and illumination, the brightness and color of the LED display screen may also change, which will cause the display effect of the corrected LED display screen to be different from the display effect of the LED display screen in the actual use environment, that is, the expected display effect cannot be achieved in the actual use process.

[0004] 2. The existing LED display screen correction is a single-board correction technology, which focuses on the correction of a single LED module, that is, after each LED module is corrected, it is considered that the LED display screen composed of a plurality of corrected LED modules will also have good display effect. However, in the actual operation process, when a plurality of corrected LED modules are spliced together, the mutual influence between the LED modules cannot be considered, and the special situation that may occur at the splicing position cannot be effectively handled. SUMMARY

[0005] The application provides an LED display screen correction method, device and readable storage medium to solve the technical problem of low correction accuracy of the existing LED display screen.

[0006] To solve the above technical problems, the technical scheme adopted by the application is as follows: an LED display screen correction method, comprising the following steps:

[0007] Step S1: making the LED module to be corrected in a stable working state;

[0008] Step S2: collecting ink color data of the LED module and quantitatively analyzing the ink color data, and uploading the quantitatively analyzed ink color data to a Flash storage unit;

[0009] Step S3: collecting brightness data, chrominance data and initial data of the LED module, and uploading the collected brightness data, chrominance data and initial data to the Flash storage unit;

[0010] Step S4: grading the LED modules according to the ink color data after quantitative analysis, placing the LED modules of the same grade together and marking accordingly;

[0011] Step S5: building the LED display screen, so that the LED modules used in the same LED display screen are in the same ink color grade, and preliminarily checking the LED display screen;

[0012] Step S6: reading back the luminance data, chrominance data and ink color data of the multiple LED modules of the same LED display screen, generating a correction coefficient after analysis and processing by a fusion algorithm;

[0013] Step S7: correcting the LED display screen based on the correction coefficient, generating a whole-screen coefficient after correction, uploading the whole-screen coefficient to a Flash storage unit and solidifying.

[0014] Further, the working state in step S1 includes a temperature state, an electrical performance state and a light-emitting state; and the method for stabilizing the working state of the LED module is to preheat the environment of the LED module, then connect the power supply to the LED module, and test the obvious abnormal problems of the LED module.

[0015] Further, the process of quantitative analysis of the ink color data in step S2 is as follows:

[0016] Step S21: dividing the LED modules into several ink color grades according to the pre-set standard;

[0017] Step S22: uploading the divided ink color grade data to the Flash storage unit.

[0018] Further, the display effect of the LED module is detected before step S3, and the detection method is as follows: connecting the power supply to the LED module, detecting whether the display of the LED module is abnormal by artificial vision, and the detection content includes but is not limited to local bright spot problem, local dark spot problem, color deviation problem, edge blur problem and unnatural color transition problem.

[0019] Further, the instrument used for collecting the luminance data of the LED module in step S3 is a light gun; and the instrument used for collecting the chrominance data of the LED module is a camera.

[0020] Further, the preliminary check in step S5 includes the following steps:

[0021] Step S51: checking the Flash storage unit of the LED display screen to ensure the normal operation of the Flash storage unit;

[0022] Step S52: read back and analyze the basic data, brightness data, chrominance data and quantitatively analyzed ink color data in the flash memory unit, evaluate the potential impact on the light-emitting performance of the lamp bead.

[0023] Further, the step S7 is to generate the correction coefficient by calculating the mean value of the plurality of brightness data and the mean value of the plurality of chrominance data.

[0024] The correction coefficient includes a brightness compensation value and a chrominance correction value.

[0025] Further, the method for correcting the LED display screen in step S8 is zoned correction, which divides the LED display screen into a plurality of regions, and corrects each region one by one to ensure that each region achieves the expected display effect.

[0026] An LED display screen correction device, comprising a memory for storing a computer program and a processor for executing the computer program to implement the above method steps.

[0027] A readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the above method steps.

[0028] The present application has the following beneficial effects compared with the prior art:

[0029] 1. The present application collects the brightness data and chrominance data of the LED module before the LED module is assembled into an LED display screen, and then reads back the brightness data and chrominance data of the LED module on the LED display screen to generate a correction coefficient. This double data processing method can more accurately correct the brightness difference and chrominance difference of each LED module, and can effectively reduce the brightness and chrominance unevenness caused by the manufacturing process of the LED module, the characteristics of the LED lamp bead and other factors, so that the brightness of each region of the LED display screen is more uniform, the color display is more accurate, and the display quality of the entire LED display screen is greatly improved.

[0030] 2. The LED module is divided into grades according to the quantitatively analyzed ink color data, and the ink color data of the LED display screen is read. When the ink color grades of the LED modules that make up the LED display screen are inconsistent, further selection and adjustment are made to ensure that the LED modules that make up the same LED display screen are in the same ink color grade, which can ensure the ink color consistency of the LED display screen in the black screen state, especially for high-end cinemas, professional stage backgrounds or night advertising boards that require high-quality black display, which can provide a deeper and more uniform black background, and enhance the overall visual effect of the LED display screen.

[0031] 3、The LED display screen correction method of the present application is to collect the brightness data, chrominance data and ink color data of the LED module in the factory, and then read the brightness data, chrominance data and ink color data of the LED module constituting the LED display screen to generate correction coefficients to correct the display effect of the LED display screen, which is more flexible than the traditional method of assembling the LED display screen, and improves the versatility of the LED module and the flexibility of assembling the LED display screen, thereby speeding up the assembly progress of the LED display screen and reducing the installation cost.

[0032] 4、The data of the LED module is collected before the LED display screen is assembled, which can be targeted to assemble the LED display screen and correct the display effect of the LED display screen, and the brightness data, chrominance data and ink color data collected in the factory are fused to generate correction coefficients, which is more accurate than the traditional method of collecting the data of the LED module and correcting the LED module on site, which helps to improve the production efficiency and quality of the LED display screen, and can realize automatic and batch production of the LED display screen, reduce the production tailing situation, and be more economical. BRIEF DESCRIPTION OF DRAWINGS

[0033] The present application will be further described below with reference to the accompanying drawings:

[0034] Fig. 1 The flow chart of collecting the data of the LED module in the factory in the LED display screen correction method of the present application;

[0035] Fig. 2 The whole screen correction flow chart of the LED display screen of the present application. DETAILED DESCRIPTION

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate relative orientation or positional relationship, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0038] As shown in Figs. 1-2 The present application provides an LED display screen correction method, comprising the following steps:

[0039] Step S1: make the LED module to be corrected in a stable working state, the working state including the temperature state, the electrical performance state and the light emitting state. Specifically:

[0040] Step S11: preheat the LED module for 3 to 5 minutes, so that the internal elements and circuits of the LED module reach a relatively stable working temperature state. Because temperature has a significant influence on the light emitting characteristics of the LED module, in a low temperature environment, the starting voltage of the LED module increases and the light emitting efficiency decreases. Preheating can reduce the correction error caused by temperature difference and ensure the accuracy and reliability of subsequent data collection;

[0041] Step S12: turn on the power supply of the LED module, and keep the power on for at least 1 minute, so that the internal elements and circuits of the LED module reach a relatively stable electrical performance and light emitting state. In the initial stage of power on, the light emitting intensity and color of the LED module will have a slight fluctuation. After a period of time, the LED module can reach a relatively stable working state, ensuring the accuracy of subsequent data collection. At the same time, it can be detected whether there is obvious electrical connection problem and abnormal light emitting condition of the LED module, so as to timely process, such as dead light, light flickering, etc.

[0042] Step S2: collect the ink color data of the LED module and quantitatively analyze it, and upload the quantitatively analyzed ink color data to the Flash storage unit. The process of quantitatively analyzing the ink color data is:

[0043] Step S21: divide the plurality of LED modules into several ink color grades according to the pre-set standard; since different batches of LED modules may have differences in ink color presentation, the ink color data can be quantitatively analyzed by collecting the ink color data, and the modules are divided into different grades according to the pre-set standard according to the collected ink color data, which provides a basis for subsequent assembly of the LED display screen. In the embodiment, the ink color grades include three grades of A, B and C, the ink color data collected falls within the ink color data range of A grade, the ink color data of the LED module is classified as A grade, the ink color data collected falls within the ink color data range of B grade, the ink color data of the LED module is classified as B grade, and the ink color data collected falls within the ink color data range of C grade, the ink color data of the LED module is classified as C grade.

[0044] Step S22: upload the divided ink color grade data to the Flash storage unit, link the ink color grade data with the LED module, so that the ink color grade data of the LED module can be obtained in the subsequent transportation, storage and LED display screen assembly process, and the control system can intelligently adjust the brightness and chrominance compensation value of the LED module according to the ink color grade data of the LED module during the assembly of the large LED display screen, to ensure the color uniformity of the LED display screen.

[0045] Step S3: collect the brightness data, chrominance data and initial data of the LED module, and upload the collected brightness data, chrominance data and initial data to the Flash storage unit. Specifically:

[0046] The brightness data of the LED module is collected by using a light gun, the brightness data information is obtained by measuring at different positions of the LED module, which provides a basis for subsequent evaluation of the display brightness uniformity of the LED module and determination of the brightness compensation value;

[0047] The chrominance data of the LED module is collected by a camera, the color coordinate values of the LED module under different color channels (red, green and blue) are measured, the accuracy and brightness of the color of the LED module when displaying a color image or video are ensured, and the color distortion phenomenon is avoided;

[0048] The initial data includes but is not limited to the initial electrical characteristics, initial light emitting characteristics, component missing data and appearance damage data of the lamp bead

[0049] Step S4: grade the LED modules according to the quantitatively analyzed ink color data, place the LED modules of the same grade together and mark them accordingly, and mark different labels for the LED modules in different grades to distinguish the LED modules in different grades. The contents of the marks include but are not limited to ink color grades, brightness data and chrominance data.

[0050] Step S5: Assembling the LED display screen, making the LED modules used in the same LED display screen in the same ink color position, and preliminarily checking the LED display screen. The LED modules with similar ink colors are combined together to improve the ink color consistency of the entire display screen, avoid obvious color block differences, and improve the visual effect. That is, an LED display screen is spliced by LED modules in the same position. The preliminary check includes the following steps:

[0051] Step S61: Checking the Flash memory unit of the LED display screen to ensure the normal operation of the Flash memory unit;

[0052] Step S62: Reading back and analyzing the initial data, brightness data, colorimetric data, and quantitatively analyzed ink color data in the Flash memory unit, analyzing and processing the parameters affecting the electrical performance of the lamp beads, and evaluating the potential influence on the light-emitting performance of the lamp beads. Specifically, the initial data, ink color data, brightness data, and colorimetric data of the LED modules constituting the LED display screen are read back, which can provide basic data basis for the correction work of the LED display screen and comprehensively understand the initial state and performance parameters of the LED display screen. It is checked whether the LED modules constituting the LED display screen are in the same ink color position to avoid obvious color block differences in the LED display screen and ensure the effectiveness and accuracy of the subsequent correction work. The parameters affecting the electrical performance of the lamp beads include but are not limited to the change range of resistance value and capacitance.

[0053] Step S6: Reading back the brightness data, colorimetric data, and ink color data of multiple LED modules constituting the same LED display screen, and generating correction coefficients through fusion algorithm analysis and processing. Specifically, the correction coefficients are generated after data fusion and processing of the mean value of multiple brightness data and the mean value of multiple colorimetric data. The correction coefficients are personalized adjustment parameters for each lamp bead or specific area, including brightness compensation value and colorimetric correction value, which provide basis for precise correction of the light-emitting characteristics of the LED display screen.

[0054] Step S7: Correcting the LED display screen based on the correction coefficients, generating the whole screen coefficients after correction, and uploading the whole screen coefficients to the Flash memory unit and solidifying.

[0055] The method for correcting the LED display screen is zoned correction, which divides the LED display screen into several regions, and corrects each region one by one to ensure that each region achieves the expected display effect. The specific steps are as follows,

[0056] Step S71: The generated correction coefficient is first applied to the correction work of a certain area of the LED display screen, so as to quickly check the effectiveness of the correction coefficient, find possible problems in time, fine-tune the correction coefficient before the whole-screen correction of the LED display screen, and improve the success rate and efficiency of the correction. The existing problems include but are not limited to the appearance of new bright-dark lines or color abnormalities due to over-correction or insufficient correction.

[0057] Step S72: The display effect of the above corrected area is photographed by using a camera, and the photographed photo is uploaded to the upper computer, so as to facilitate the technician to compare the differences before and after correction, evaluate the correction effect from the visual angle, and at the same time, archive the photographed photo for subsequent analysis and tracing. The camera in the embodiment can use the camera function in the mobile communication device, such as the camera function in the mobile phone.

[0058] Step S73: The generated correction coefficient is applied to the correction work of another area of the LED display screen, and the above process is repeated to ensure that each part of the whole screen of the LED display screen can be accurately corrected, and the high consistency of the whole screen display effect is realized.

[0059] The whole-screen coefficient is the final parameter set of the corrected areas on the LED display screen, which is uploaded to the Flash storage unit of the LED display screen and solidified. The solidified whole-screen coefficient can continuously correct the display effect of the LED display screen, and ensure that the LED display screen can present high-quality pictures every time it is turned on.

[0060] Before the brightness data, chrominance data and initial data of the LED module are collected in step S3, the display effect of the LED module is detected. The detection method is: the LED module is connected to the power supply, and further artificial visual detection is performed to detect whether the LED module display is abnormal, so as to timely adjust or replace the abnormal LED module. The detection content includes but is not limited to local bright spot problem, local dark spot problem, color deviation problem, edge blur problem and unnatural color transition problem that may occur when some special patterns or characters are displayed.

[0061] An LED display screen correction device, comprising a memory and a processor, the memory is used to store a computer program, and the processor is used to execute the computer program to realize the above method steps.

[0062] A readable storage medium, the readable storage medium stores a computer program, and the computer program is executed by a processor to realize the above method steps.

[0063] It should be noted that the connection relationship between the components and modules of the present application is determined and can be realized. Except for the special description in the embodiments, the specific connection relationship can bring about the corresponding technical effects, and based on the premise of not relying on the corresponding software program execution, the technical problems proposed by the present application are solved. The model of the components, modules, specific elements, the connection mode between them, and the conventional use method and the expected technical effects brought by the above technical features, except for the specific description, all belong to the public content that can be obtained by the prior art before the application date, such as patents, journal papers, technical manuals, technical dictionaries, textbooks, or belong to the existing technology of the conventional technology and common knowledge in the art, and do not need to be described in detail. The technical solutions provided in the present application are clear, complete, and can be realized, and the corresponding entity products can be reproduced or obtained according to the technical means.

[0064] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for calibrating an LED display screen, characterized in that: The method comprises the following steps: Step S1: making the LED module to be corrected in a stable working state; Step S2: collecting the ink color data of the LED module and performing quantitative analysis thereon, and uploading the quantitatively analyzed ink color data to a Flash storage unit; Step S3: collecting the brightness data, chrominance data and initial data of the LED module, and uploading the collected brightness data, chrominance data and initial data to the Flash storage unit; Step S4: grading the LED module according to the quantitatively analyzed ink color data, and placing the LED modules of the same ink color grade together and marking them accordingly; Step S5: building an LED display screen, so that the LED modules used in the same LED display screen are in the same ink color grade, and performing preliminary inspection on the LED display screen; Step S6: reading back the brightness data, chrominance data and ink color data of the multiple LED modules of the same LED display screen, and generating a correction coefficient after analysis and processing by a fusion algorithm; Step S7: correcting the LED display screen based on the correction coefficient, generating an entire screen coefficient after correction, and uploading the entire screen coefficient to the Flash storage unit and solidifying it. 2.The LED display screen correction method of claim 1, wherein: The working state in step S1 includes a temperature state, an electrical performance state and a light emitting state; and the method for stabilizing the working state of the LED module is as follows: first, preheating the environment of the LED module, then connecting the power supply to the LED module, and testing the obvious abnormal problems existing in the LED module. 3.The LED display screen correction method of claim 1, wherein: The process of quantitative analysis of the ink color data in step S2 is as follows: Step S21: dividing the LED module into a plurality of ink color grades according to a pre-set standard; Step S22: uploading the divided ink color grade data to the Flash storage unit.

4. The LED display screen correction method of claim 1, wherein: Before step S3, the display effect of the LED module is detected, and the detection method is as follows: connecting the power supply to the LED module, and detecting whether the display of the LED module is abnormal by artificial vision, and the contents of the detection include but are not limited to local bright spot problems, local dark spot problems, color deviation problems, edge blur problems and unnatural color transition problems.

5. The LED display screen correction method of claim 1, wherein: The instrument used for collecting the brightness data of the LED module in step S3 is a light gun; and the instrument used for collecting the chrominance data of the LED module is a camera.

6. The LED display screen correction method of claim 1, wherein: The preliminary verification in step S5 comprises the following steps: Step S51: verifying the Flash storage unit of the LED display screen to ensure the normal operation of the Flash storage unit; Step S52: reading back and analyzing the basic data, brightness data, chrominance data and quantitatively analyzed ink color data in the Flash storage unit, and evaluating the potential influence of the same on the light emitting performance of the lamp beads.

7. The LED display screen correction method of claim 1, wherein: In step S6, the correction coefficient is generated after data fusion processing by calculating the mean value of the multiple brightness data and the mean value of the multiple chrominance data; The correction coefficient includes a brightness compensation value and a chrominance correction value. 8.The LED display screen correction method of claim 1, wherein: In step S7, the method for correcting the LED display screen is zonal correction, the LED display screen is divided into a plurality of regions, each region is corrected one by one, and it is ensured that each region reaches the expected display effect.

9. An LED display screen correction device, characterized by: A computer program product comprising a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code configured such that, on execution by a computer, the computer is caused to perform the steps of the method of any of claims 1-8.

10. A readable storage medium, characterized by: A computer program product comprising a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code configured such that, on execution by a computer, the computer is caused to perform the steps of the method of any of claims 1-8.

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