CN117351872A

CN117351872A - LED module, correction method of LED lamp panel and LED lamp panel correction system

Info

Publication number: CN117351872A
Application number: CN202311295240.4A
Authority: CN
Inventors: 林锦欣; 刘波; 黄达森; 陈启达; 方明
Original assignee: Chainzone Technology Foshan Co Ltd
Current assignee: Chainzone Technology Foshan Co Ltd
Priority date: 2023-10-08
Filing date: 2023-10-08
Publication date: 2024-01-05

Abstract

The invention relates to the technical field of display correction, in particular to an LED module, a correction method of an LED lamp panel and an LED lamp panel correction system. Through carrying out correction processing with each LED module in the LED lamp plate to carry out secondary correction to whole LED lamp plate according to each LED module correction data, realized the correction to whole LED lamp plate. And introducing inclination compensation and intensity compensation in the correction process for each LED module, so that the correction of each LED in the LED module is optimal. Compared with the prior art, the correction method provided by the application has the technical advantages of high correction efficiency and good primary correction effect.

Description

LED module, correction method of LED lamp panel and LED lamp panel correction system

Technical Field

The invention relates to the technical field of display correction, in particular to an LED module, a correction method of an LED lamp panel and an LED lamp panel correction system.

Background

With the rapid development of the LED industry, an LED display screen is widely used as a flat panel display device in various occasions of daily life. LED displays are widely used and rapidly developed, and are indistinguishable from their own advantages, which in general include: high brightness, low working voltage, small power consumption, free assembly, large screen, long service life, low failure rate, impact resistance, stable performance, high visibility, easy matching with integrated circuits and the like. The LED display screen is based on semiconductor technology which is vigorously developed for decades, has a series of advantages of adjustable brightness range, safety, environmental protection, energy conservation, bright color, large visual range, clear content and the like, and compared with other traditional information display media, the LED display screen has the advantages of easy content updating, low cost, good timeliness, and bright and smooth color moving pictures are easier to attract eyeballs of people, and has incomparable advantages of other media in information display and transmission. At present, the LED display screen is developing towards higher brightness, higher weatherability and higher luminous density, and meanwhile, the requirements of people on the display quality are becoming more stringent

The LED display screen is composed of a plurality of LED modules and has the characteristic of large size. The correction method aims at the correction of the LED display screen in the prior art, generally, the full screen of the LED display screen is corrected, a correction field for large screen placement is needed, and the correction time of the LED display screen is more than a few hours because of the larger size of the LED display screen, which is time-consuming and labor-consuming. With full screen correction, the camera shoots only in one position, the lamp panel module angles around the screen are larger, the lamp panel module is relatively in the center, the phase difference angle is larger, the angle can influence the lamp panel lens light difference and the camera shooting deformation, if the person looks at the angle and looks at the center, the effect can be good, if looking at other positions, the effect can be poor, and the positions of each module can not be interchanged.

Disclosure of Invention

In order to solve the above problems, the application provides an LED module, a correction method of an LED lamp panel and an LED lamp panel correction system, which are characterized in that correction processing is performed on each LED module in an LED display screen, so that correction data of each module are uniform, good effect of the whole screen can be ensured under a full screen environment, interchangeability of each module is good, and the same effect can be achieved at different positions.

In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

in a first aspect, an LED module is provided, including n×m LED pixels controlled independently of each other and arranged in rows and columns, N, M is a positive integer greater than or equal to 2, the n×m LED pixels respectively correspond to n×m pixel positions, and each of the LED pixels includes a plurality of LEDs of different colors.

In a second aspect, a method for calibrating an LED lamp panel is provided, where the LED lamp panel is provided with at least two LED modules as described above, and the method includes: respectively carrying out brightness correction on at least two LED modules to obtain first correction data and second correction data; acquiring target correction data based on the first correction data and the second correction data, wherein the target correction data is an average value of the first correction data and the second correction data; and respectively carrying out secondary correction on the brightness of at least two LED modules based on the target correction data.

Further, the performing brightness correction on at least two LED modules respectively includes: controlling at least two LED modules to display correction images in a target lighting mode; acquiring the brightness of each LED in the corrected image, and calculating initial correction data according to the brightness difference of each LED; compensating the initial correction data to obtain compensation correction data; and correcting each LED based on the compensation correction data until the standard deviation of the brightness of each LED is smaller than a preset threshold value, thereby completing correction.

Further, acquiring the brightness of each LED in the corrected image includes: acquiring a template image of the LED module, wherein the template image is an unlit image of the LED module; comparing the template image with any one of the NxM red correction images, the NxM green correction images and the NxM blue correction images to remove an environment image, so as to obtain a target image, wherein the target image comprises each LED; and determining each LED pixel position in the target image, and calculating the brightness of the LED corresponding to each LED pixel position.

Further, the determining each LED pixel location in the target image includes: carrying out gray processing on the target image, and obtaining a plurality of characteristic contours as characteristic points based on Canny edge detection calculation, wherein the characteristic points are each LED contour; and constructing a feature grid based on the feature points of the four top points as edge constraints, and determining the pixel position of each LED based on the feature grid.

Further, the compensating the initial correction data to obtain compensated correction data includes: and obtaining an inclination compensation coefficient through polynomial plane fitting, and compensating the correction data based on the inclination compensation coefficient to obtain correction brightness.

Further, the compensating the initial correction data to obtain compensated correction data includes: and compensating each LED in the edge rows and the edge columns in the characteristic grid based on the edge enhancement coefficient to obtain compensation correction data.

Further, the obtaining of the edge enhancement coefficient includes: acquiring a unit characteristic grid consisting of pixel positions of a 5x5 matrix structure in the characteristic grid, a central LED corresponding to a central pixel position in the unit characteristic grid, and the central LED brightness; controlling a plurality of brightness variation values of the central LED under brightness variation conditions of each LED except the central LED in the unit feature grid; the edge enhancement coefficient is determined based on a plurality of the luminance change values.

In a third aspect, an LED light panel correction system is provided, the LED light panel comprising at least two LED modules, the system comprising: the image acquisition device is arranged right above the LED modules and is used for acquiring images of at least two LED modules; the module correction device is used for respectively carrying out brightness correction on at least two LED modules to obtain first correction data and second correction data; the data processing device is used for processing the first correction data and the second correction data to obtain target correction data, wherein the target correction data is an average value of the first correction data and the second correction data; and the lamp panel correction device is used for respectively carrying out secondary correction on the brightness of at least two LED modules based on the target correction data to finish the integral correction of the lamp panel.

Further, the module correction device includes: a correction image acquisition module for controlling the LED module to display a correction image in a target lighting mode; a correction data acquisition unit configured to acquire a luminance of each of the LEDs in the correction image, and calculate initial correction data according to a luminance difference of each of the LEDs; the compensation module is used for compensating the initial correction data to obtain compensation correction data; and the correction module corrects each LED based on the compensation correction data until the standard deviation of the brightness of each LED is smaller than a preset threshold value, so as to finish correction.

In a fourth aspect, a computer readable storage medium is provided, where a computer program is stored, and when the computer program is executed by a processor, the method for correcting an LED lamp panel according to any one of the above is implemented.

In the technical scheme provided by the embodiment of the application, each LED module in the LED lamp panel is subjected to correction processing, and the whole LED lamp panel is subjected to secondary correction according to the correction data of each LED module, so that the correction of the whole LED lamp panel is realized. And introducing inclination compensation and intensity compensation in the correction process for each LED module, so that the correction of each LED in the LED module is optimal. Compared with the prior art, the correction method provided by the application has the technical advantages of high correction efficiency and good primary correction effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

The methods, systems, and/or programs in the accompanying drawings will be described further in terms of exemplary embodiments. These exemplary embodiments will be described in detail with reference to the drawings. These exemplary embodiments are non-limiting exemplary embodiments, wherein the exemplary numbers represent like mechanisms throughout the various views of the drawings.

Fig. 1 is a schematic flow chart of a method for correcting an LED lamp panel according to an embodiment of the present application.

Fig. 2 is a flowchart of an LED module calibration method according to an embodiment of the present application.

Fig. 3 is a color level diagram of an LED lamp panel under an oblique condition according to an embodiment of the present application.

Fig. 4 is model data for plane fitting in tilt compensation provided by an embodiment of the present application.

Fig. 5 is a color level diagram of an LED lamp panel after tilt compensation according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of an LED lamp panel correction system according to an embodiment of the present disclosure.

Fig. 7 is a schematic structural diagram of a module calibration device according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of an electronic device for correcting an LED lamp panel according to an embodiment of the present application.

Detailed Description

In order to better understand the technical solutions described above, the following detailed description of the technical solutions of the present application is provided through the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present application are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features of the embodiments and embodiments of the present application may be combined with each other without conflict.

In the following detailed description, numerous specific details are set forth by way of examples in order to provide a thorough understanding of the relevant teachings. However, it will be apparent to one skilled in the art that the present application may be practiced without these details. In other instances, well-known methods, procedures, systems, components, and/or circuits have been described at a relatively high-level, without detail, in order to avoid unnecessarily obscuring aspects of the present application.

The flowcharts are used in this application to describe implementations performed by systems according to embodiments of the present application. It should be clearly understood that the execution of the flowcharts may be performed out of order. Rather, these implementations may be performed in reverse order or concurrently. Additionally, at least one other execution may be added to the flowchart. One or more of the executions may be deleted from the flowchart.

Before describing embodiments of the present invention in further detail, the terms and terminology involved in the embodiments of the present invention will be described, and the terms and terminology involved in the embodiments of the present invention will be used in the following explanation.

(1) In response to a condition or state that is used to represent the condition or state upon which the performed operation depends, the performed operation or operations may be in real-time or with a set delay when the condition or state upon which it depends is satisfied; without being specifically described, there is no limitation in the execution sequence of the plurality of operations performed.

(2) Based on the conditions or states that are used to represent the operations that are being performed, one or more of the operations that are being performed may be in real-time or with a set delay when the conditions or states that are being relied upon are satisfied; without being specifically described, there is no limitation in the execution sequence of the plurality of operations performed.

The application scenario for the embodiment of the application is correction processing for a large-size LED lamp panel, and in the prior art, correction is performed for the large-size LED lamp panel, wherein correction is mainly performed for brightness differences between lamp beads arranged on the LED lamp panel. In practice, the brightness of each lamp bead is adjusted, because the LED lamp panel is composed of more LED lamp beads, in order to ensure the uniformity of correction of multiple lamp beads in the LED lamp panel, the general scheme is to make overall correction for the LED lamp panel. The correction method can comprehensively acquire the brightness difference between each LED lamp bead arranged on the LED lamp panel, so that the comprehensiveness and the balance of the LDE lamp panel correction are realized.

However, the correction method is limited by the large size of the LED lamp panel, and has high correction cost. Firstly, a correction space for placing an LED lamp panel is needed, a second camera only shoots at one position aiming at full screen correction, the angles of the lamp panel modules around the screen are larger, the lamp panel modules at the opposite centers are larger in phase difference angle, the angles can influence the light difference of the lamp panel lenses and the deformation of shooting the camera, if the person looks at the center, the effect can be good, if the person looks at the center, the effect can be poor, and the positions of each module cannot be interchanged.

Therefore, an improved method is required to be provided for correcting the whole screen of the LED lamp panel in the prior art, so that the LED lamp panel is corrected rapidly and accurately.

Aiming at the background technology, the embodiment of the application provides a correction method for an LED lamp panel, wherein the LED lamp panel in the embodiment of the application is a large-size LED screen, and at least two LED modules are formed, the correction thought is to respectively correct the LED modules, and then the corrected LED modules are subjected to secondary correction according to the average value of correction data, so that the integral correction for the LED lamp panel is realized.

For this method, referring to fig. 1, the method specifically includes the following steps:

s110, respectively carrying out brightness correction on at least two LED modules to obtain first correction data and second correction data.

Step S120, acquiring target correction data based on the first correction data and the second correction data.

In the embodiment of the present application, since the correction is performed for the single module in step S110, the variability inside the module has been eliminated by the correction of the single module, but the variability between modules also exists. Embodiments of the present application address this problem by introducing an average compensation to eliminate the variability between modules. The average value of the average compensation is relatively stable by taking the average of a plurality of modules, so that when the correction of each module is completed, the average value of correction data is calculated, and then the brightness data is integrally increased or decreased, so that the average value of each module reaches a uniform target value, and the difference between each lamp panel module can be ensured to be minimized. However, there is a precondition for average compensation, which is a module for the same batch of LED tubes production.

And S130, respectively carrying out secondary correction on the brightness of at least two LED modules based on the target correction data.

The difference between the LED modules after the secondary correction is reduced, so that the balance of the LED lamp panel is improved.

The correction processing method for each LED module in step S110 is applied to a single LED module, where the single LED module is an LED module, the LED module includes n×m LED pixels that are controlled independently from each other and are arranged in rows and columns, N, M is a positive integer greater than or equal to 2, the n×m LED pixels respectively correspond to n×m pixel positions, and each of the LED pixels includes a plurality of LEDs of different colors.

Referring to fig. 2 for a correction method, the method includes the following steps:

and S210, controlling the LED module to display a correction image in a target lighting mode.

In an embodiment of the present application, the plurality of different color LEDs for each of the LED pixels includes a red LED, a green LED, and a blue LED.

Wherein for this process mainly: controlling the LED module to display n×m red corrected images in the target lighting manner; controlling the plurality of LED modules to display n×m green corrected images in the target lighting manner; and controlling the plurality of LED modules to display n×m blue corrected images in the target lighting manner.

The LED module acquires the corrected image based on the mode of photographing the target lighting mode by a camera.

And S220, acquiring the brightness of each LED in the corrected image, and calculating initial correction data according to the brightness difference of each LED.

In the embodiment of the present application, the acquisition of the brightness for each LED is achieved by the following procedure:

and acquiring a template image of the LED module. In this embodiment of the present application, the template image is an image that is not lit by the LED module, and the image is also acquired by a camera through an image acquisition mode when the LED module is not lit.

And comparing the template image with any one of the N multiplied by M red correction images, the N multiplied by M green correction images and the N multiplied by M blue correction images to remove an environment image, so as to obtain a target image, wherein the target image is an image containing each LED. In the embodiment of the application, the red correction image, the green correction image and the blue correction image are collected under the condition that the camera is controlled to respectively shoot the red, green and blue 3 colors of the LED module. The process is mainly used for eliminating background information in the corrected image, only the image containing the LEDs is reserved, and environmental interference in the image is eliminated.

And determining each LED pixel position in the target image, and calculating the brightness of the LED corresponding to each LED pixel position.

In the embodiment of the application, the acquisition of the pixel position of each LED is obtained based on an image processing method, the process is mainly that gray processing is carried out on the images through an OpenCV algorithm, the contours of the LEDs are found through a Canny edge detection algorithm, then the characteristic points of four top points and LED lamp beads are found, straight lines penetrate through each contour to form grids, the position of each LED can be positioned to which contour corresponds, the center point of each LED is obtained through calculating the brightest point in the contour, and each center point is the pixel position of each LED.

Wherein the brightness determination for the LEDs in the embodiments of the present application is calculated based on the Raw file in the analysis image. Since the image acquisition device, namely the JPG format photo RGB data of the camera, is only 255 and has smaller precision after being compressed by the camera, pgm files are obtained by analyzing the most original Raw files and converting tools of camera manufacturers, the gray values in the Pgm files are obtained to calculate the brightness, the value has a 65535 range, and the precision is higher.

And S230, compensating the initial correction data to obtain compensation correction data.

In the embodiment of the present application, the compensation processing includes two modes of tilt compensation and edge compensation.

For tilt compensation, because the LED light panel in this embodiment of the present application is larger in size and is typically installed at a higher position in the environment, the viewing angle of the person is about 10 degrees downward in the horizontal direction of the screen to look up. Therefore, the camera is placed at a position 10 degrees down at the module level to take a photograph of the module. Due to the influence of the inclination angle or the error of the placement position of the camera, the LED brightness data of the image will show a regular plane inclination, and the brightness distribution of the LED lamp panel generated under the inclination condition is referred to the color gradation chart provided by fig. 3, according to the color gradation in fig. 3, blue is a brighter spot, and red is a darker spot. However, in practice, the luminance data of the module should be on a plane, so the coefficients a0, a1, a2 of the inclined plane need to be calculated by polynomial plane fitting, and reference is made to fig. 4 for plane-fitted model data.

The luminance data in fig. 4 is then modified to a horizontal plane, and the final effect is shown in the tone scale diagram in fig. 5.

And obtaining inclination compensation coefficients by polynomial plane fitting for edge compensation, and compensating the correction data based on the inclination compensation coefficients to obtain correction brightness. Specifically, each LED in the edge rows and the edge columns in the feature grid is compensated based on the edge enhancement coefficient, and compensation correction data are obtained.

Aiming at the method, a single module is corrected, the LED lamp beads in the central part inside the module are influenced by the light supplement of LEDs around, and the brightness is higher. However, the LED lamp beads at the edge positions are less in light supplement to the LEDs beside, so that the brightness is reduced, and when the whole screen is finally assembled, the LEDs beside the whole screen are also in light supplement. So that the brightness is compensated for when correction is performed, if it is necessary to simulate that the edges of this module also have a light filling effect.

Specifically, the LED in the center is affected by the LEDs around the LED, and has an effect of light supplementing enhancement, and by lighting the LEDs in different positions for multiple times, an enhancement coefficient of brightness of each position to brightness of the center point under a 5x5 matrix is calculated. For the 5x5 matrix in the embodiment of the present application, the matrix structure mainly composed of the lamp beads influencing the central lamp bead is 5x5, but the matrix structure of the LED module under other dimensions can be changed and adjusted.

According to the coefficient, the embodiment of the application can carry out analog compensation on the LED lamp beads on the edges.

And S240, correcting each LED based on the compensation correction data until the standard deviation of the brightness of each LED is smaller than a preset threshold value, and finishing correction.

And (3) correcting each LED lamp bead according to the final correction data of the LED module, which is obtained in the step (S230), until the standard deviation of the brightness of each LED is smaller than a preset threshold value, thereby completing the correction.

Referring to fig. 6, the embodiment of the present application provides an LED lamp panel correction system 600 based on steps S110-S130 and steps S210-S240, the system comprising:

the image acquisition device 610 is arranged right above the LED modules and is used for acquiring images of at least two LED modules;

module correction means 620, configured to perform brightness correction on at least two LED modules respectively, so as to obtain first correction data and second correction data;

a data processing device 630, configured to process the first correction data and the second correction data to obtain target correction data, where the target correction data is an average value of the first correction data and the second correction data;

and the lamp panel correction device 640 is used for respectively carrying out secondary correction on the brightness of at least two LED modules based on the target correction data to complete the integral correction of the lamp panel.

Referring to fig. 7, the module correction device 620 includes:

a corrected image acquisition module 6211 for controlling the LED module to display a corrected image in a target lighting manner;

a correction data acquisition 6212 for acquiring the brightness of each of the LEDs in the correction image and calculating initial correction data based on the brightness difference of each LED;

the compensation module 6213 compensates the initial correction data to obtain compensation correction data;

and a correction module 6214 for correcting each LED based on the compensation correction data until the standard deviation of the brightness of each LED is smaller than a preset threshold value, thereby completing the correction.

Referring to fig. 8, an LED light panel correction electronic device 800 may include one or more processors 801 and a memory 802, where the memory 802 may store one or more application programs or data. Wherein the memory 802 may be transient storage or persistent storage. The application programs stored in the memory 802 may include one or more modules (not shown), each of which may include a series of computer executable instructions in the LED lamp panel correction electronics. Still further, the processor 801 may be configured to communicate with the memory 802 and execute a series of computer executable instructions in the memory 802 on the LED lamp panel correction electronics. The LED light board correction electronics may also include one or more power supplies 803, one or more wired or wireless network interfaces 804, one or more input/output interfaces 805, one or more keyboards 3806, and the like.

In one particular embodiment, the LED light board correction electronics includes a memory, and one or more programs, wherein the one or more programs are stored in the memory, and the one or more programs may include one or more modules, and each module may include a series of computer-executable instructions for the LED light board correction electronics, and configured to be executed by the one or more processors, the one or more programs including computer-executable instructions for:

respectively carrying out brightness correction on at least two LED modules to obtain first correction data and second correction data;

acquiring target correction data based on the first correction data and the second correction data;

and respectively carrying out secondary correction on the brightness of at least two LED modules based on the target correction data.

The following describes each component of the processor in detail:

wherein in the present embodiment, the processor is a specific integrated circuit (application specific integrated circuit, ASIC), or one or more integrated circuits configured to implement embodiments of the present application, such as: one or more microprocessors (digital signal processor, DSPs), or one or more field programmable gate arrays (field programmable gate array, FPGAs).

Alternatively, the processor may perform various functions, such as performing the method shown in fig. 1 described above, by running or executing a software program stored in memory, and invoking data stored in memory.

In a particular implementation, the processor may include one or more microprocessors, as one embodiment.

The memory is configured to store a software program for executing the solution of the present application, and the processor is used to control the execution of the software program, and the specific implementation manner may refer to the above method embodiment, which is not described herein again.

Alternatively, the memory may be read-only memory (ROM) or other type of static storage device that can store static information and instructions, random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, but may also be, without limitation, electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be integrated with the processor or may exist separately and be coupled to the processing unit through an interface circuit of the processor, which is not specifically limited in the embodiments of the present application.

It should be noted that the structure of the processor shown in this embodiment is not limited to the apparatus, and an actual apparatus may include more or less components than those shown in the drawings, or may combine some components, or may be different in arrangement of components.

In addition, the technical effects of the processor may refer to the technical effects of the method described in the foregoing method embodiments, which are not described herein.

It should be appreciated that the processor in embodiments of the present application may be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example but not limitation, many forms of random access memory (random access memory, RAM) are available, such as Static RAM (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware (e.g., circuitry), firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An LED module, comprising n×m LED pixels controlled independently of each other and arranged in rows and columns, N, M being a positive integer greater than or equal to 2, the n×m LED pixels respectively corresponding to n×m pixel positions, and each of the LED pixels comprising a plurality of LEDs of different colors.

2. A method of calibrating an LED light panel, wherein the LED light panel has at least two of the LED modules of claim 1 disposed thereon, the method comprising:

acquiring target correction data based on the first correction data and the second correction data, wherein the target correction data is an average value of the first correction data and the second correction data;

3. The method of calibrating a lamp panel according to claim 2, wherein the performing brightness calibration on at least two LED modules respectively includes:

controlling at least two LED modules to display correction images in a target lighting mode;

acquiring the brightness of each LED in the corrected image, and calculating initial correction data according to the brightness difference of each LED;

compensating the initial correction data to obtain compensation correction data;

and correcting each LED based on the compensation correction data until the standard deviation of the brightness of each LED is smaller than a preset threshold value, thereby completing correction.

4. The method of calibrating an LED lamp panel according to claim 3, wherein obtaining the brightness of each LED in the calibration image comprises:

acquiring a template image of the LED module, wherein the template image is an unlit image of the LED module;

comparing the template image with any one of the NxM red correction images, the NxM green correction images and the NxM blue correction images to remove an environment image, so as to obtain a target image, wherein the target image comprises each LED;

5. The method of calibrating an LED light panel of claim 4, wherein said determining each LED pixel location in the target image comprises:

carrying out gray processing on the target image, and obtaining a plurality of characteristic contours as characteristic points based on Canny edge detection calculation, wherein the characteristic points are each LED contour;

and constructing a feature grid based on the feature points of the four top points as edge constraints, and determining the pixel position of each LED based on the feature grid.

6. The method for calibrating an LED lamp panel according to claim 3, wherein compensating the initial calibration data to obtain compensation calibration data comprises: and obtaining an inclination compensation coefficient through polynomial plane fitting, and compensating the correction data based on the inclination compensation coefficient to obtain correction brightness.

7. The method of calibrating an LED lamp panel according to claim 5, wherein compensating the initial calibration data to obtain compensation calibration data comprises: and compensating each LED in the edge rows and the edge columns in the characteristic grid based on the edge enhancement coefficient to obtain compensation correction data.

8. The method for calibrating an LED lamp panel according to claim 7, wherein the obtaining of the edge enhancement factor comprises:

acquiring a unit characteristic grid consisting of pixel positions of a 5x5 matrix structure in the characteristic grid, a central LED corresponding to a central pixel position in the unit characteristic grid, and the central LED brightness;

controlling a plurality of brightness variation values of the central LED under brightness variation conditions of each LED except the central LED in the unit feature grid;

the edge enhancement coefficient is determined based on a plurality of the luminance change values.

9. An LED light panel correction system, wherein the LED light panel comprises at least two LED modules, the system comprising:

the image acquisition device is arranged right above the LED modules and is used for acquiring images of at least two LED modules;

the module correction device is used for respectively carrying out brightness correction on at least two LED modules to obtain first correction data and second correction data;

the data processing device is used for processing the first correction data and the second correction data to obtain target correction data, wherein the target correction data is an average value of the first correction data and the second correction data;

and the lamp panel correction device is used for respectively carrying out secondary correction on the brightness of at least two LED modules based on the target correction data to finish the integral correction of the lamp panel.

10. The LED light board correction system of claim 9, wherein the module correction means comprises:

a correction image acquisition module for controlling the LED module to display a correction image in a target lighting mode;

a correction data acquisition unit configured to acquire a luminance of each of the LEDs in the correction image, and calculate initial correction data according to a luminance difference of each of the LEDs;

the compensation module is used for compensating the initial correction data to obtain compensation correction data;

and the correction module corrects each LED based on the compensation correction data until the standard deviation of the brightness of each LED is smaller than a preset threshold value, so as to finish correction.