CN114677958B - Correction method, device and system for LED display screen - Google Patents

Correction method, device and system for LED display screen Download PDF

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Publication number
CN114677958B
CN114677958B CN202210332630.3A CN202210332630A CN114677958B CN 114677958 B CN114677958 B CN 114677958B CN 202210332630 A CN202210332630 A CN 202210332630A CN 114677958 B CN114677958 B CN 114677958B
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correction coefficient
screen
correction
led display
brightness
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CN114677958A (en
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何志民
王利文
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Colorlight Cloud Technology Co Ltd
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Colorlight Cloud Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

The invention relates to the technical field of LED display screen correction, and particularly discloses a correction method, device and system of an LED display screen, wherein the correction method comprises the steps of obtaining an initial screen display image of the LED display screen when the LED display screen is displayed at a preset gray level value; generating an initial brightness correction coefficient; acquiring a first corrected screen display image when the brightness of the LED display screen is corrected and displayed; generating a first brightness correction coefficient; calculating the product of the initial brightness correction coefficient and the first brightness correction coefficient as a second brightness correction coefficient; acquiring a second correction screen display image of the LED display screen after correction and display; generating a chromaticity correction coefficient according to a second correction screen display image and a preset chromaticity correction coefficient calculation strategy; and calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as a final correction coefficient of the screen. The invention overcomes the defect that the display effect of the whole screen is poor due to the fact that part of the modules are too bright or too dark, and ensures the display effect of the LED display screen.

Description

Correction method, device and system for LED display screen
Technical Field
The invention relates to the technical field of LED display screen correction, in particular to a correction method, device and system of an LED display screen.
Background
In recent years, the LED display screen industry rapidly develops, and the application industry is various. For example, the LED advertising screen has been used as a new media advertising method to replace the banner to become a new strength of advertising media industry, which has the characteristics of high definition, high brightness, bright color, clear main body, novel design, synchronous image broadcasting, etc., and can stand out from massive advertising information, inadvertently give visual stimulus to the audience, capture the attention of the audience, thereby completing the transmission of news information products across media and multiple offices, giving more diversified information experience to the readers in digital years, and the application places generally include markets, building outer walls, show windows, walking streets, office buildings, real estate companies, hotels, etc.
In view of the requirement for large-scale picture display, a plurality of LED modules are adopted for splicing, and a spliced LED display large screen is obtained. Because the LED modules can come from different manufacturers or be produced in different batches, or because of factors such as unstable production conditions, the display difference of brightness and chromaticity exists among the modules in the spliced LED display screen, and human eyes are very sensitive to the difference of brightness and color, so that the viewing experience of people is greatly influenced. In the prior art, a correction method for an LED display screen exists, a group of correction coefficients are correspondingly generated by collecting screen data of a certain order, and then the LED display screen is corrected, so that the display effect area of the LED display screen is uniform. However, for a display module with larger difference of brightness, for example, a part of COB module, or a part of module with brightness difference of more than 50%, the camera cannot be adjusted to a proper shooting parameter in the correction process, because when the camera shoots an LED display screen, the exposure time is required to be adjusted according to the brightness of the screen to achieve the optimal exposure state, if the screen is too bright or too dark, the acquired information is inaccurate, when the original brightness difference of the screen is too large, the too bright area is too exposed, the too dark area is still in the underexposure area, and great difficulty is brought to the acquisition of the camera, so that the acquisition process is very time-consuming, and the performance requirement on the camera is high; in addition, the LED screen has linearity problem, because the light emitting tube core of the driving chip and the lamp is determined by the production industry, the brightness of the bright area and the brightness of the dark area of the screen are required to be reduced, the more the brightness is reduced, the more obvious the linearity difference is, and more problems are brought to the display effect after the display screen is corrected.
Therefore, a method is required to solve the above problems.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a correction method, a correction device and a correction system for an LED display screen.
The invention discloses a correction method of an LED display screen, which comprises the following steps:
acquiring an initial screen display image of the LED display screen when the LED display screen is displayed at a preset gray scale value;
generating an initial brightness correction coefficient according to an initial screen display image and a preset first correction coefficient calculation strategy;
transmitting the initial brightness correction coefficient to the LED display screen, and acquiring a first correction screen display image displayed after the LED display screen is corrected;
generating a first brightness correction coefficient according to the first correction screen display image and a first correction coefficient calculation strategy;
calculating the product of the initial brightness correction coefficient and the first brightness correction coefficient as a second brightness correction coefficient;
transmitting the second brightness correction coefficient to the LED display screen, and acquiring a second correction screen display image when the LED display screen is displayed after correction;
generating a chromaticity correction coefficient according to a second correction screen display image and a preset chromaticity correction coefficient calculation strategy;
calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as a final correction coefficient of the screen;
And sending the final correction coefficient of the screen to the LED display screen.
Further, the method further comprises the following steps:
calculating a gray level difference value of the display image of the second correction screen according to a preset gray level difference calculation strategy, and judging whether the gray level difference value is larger than a preset gray level difference threshold value or not; if yes, then
Generating a new first brightness correction coefficient according to the second correction screen display image and the first correction coefficient calculation strategy;
calculating the product of the second brightness correction coefficient and the new first brightness correction coefficient as a third brightness correction coefficient;
correcting the LED display screen according to the third brightness correction coefficient, and acquiring a third correction screen display image when the LED display screen is displayed after correction;
generating a chromaticity correction coefficient according to a third correction screen display image and a preset chromaticity correction coefficient calculation strategy;
calculating the product of the third brightness correction coefficient and the chromaticity correction coefficient as a final correction coefficient of the screen;
and sending the final correction coefficient of the screen to the LED display screen.
Further, generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy includes:
extracting an initial brightness value of the LED display screen from the initial screen display image;
Obtaining a target brightness value of the LED display screen when the LED display screen is displayed under a preset gray scale value;
and generating an initial brightness correction coefficient according to the initial brightness value, the target brightness value and the first correction coefficient calculation strategy.
Further, calculating a gray-scale difference value of the second correction screen display image according to a preset gray-scale difference calculation strategy, including:
extracting a corrected brightness value of the LED display screen from the display image of the second corrected screen, and calculating a corrected brightness average value;
finding out the highest gray-scale value and the lowest gray-scale value in the corrected brightness values;
and calculating a gray level difference value according to the gray level difference calculation strategy, the highest gray level value, the lowest gray level value and the corrected brightness average value.
Further, the gray level difference calculation strategy includes:
gray level difference value= (highest gray level value-lowest gray level value)/corrected luminance average value is 100%.
Further, the initial luminance value and the corrected luminance value are both spectral tristimulus value matrices.
Further, generating a chromaticity correction coefficient according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy includes:
extracting a tristimulus value matrix of an original color gamut space of the LED display screen from the display image of the second correction screen;
Acquiring a tristimulus value matrix of a target color gamut space;
and generating a chromaticity correction coefficient according to the tristimulus value matrix of the original color gamut space, the tristimulus value matrix of the target color gamut space and the chromaticity correction coefficient calculation strategy.
Further, when an initial screen display image of the LED display screen is obtained when the LED display screen is displayed under the preset gray scale value, the preset gray scale value is the highest gray scale value.
The invention also comprises a correction device of the LED display screen, the correction device comprises an image acquisition module, a first correction coefficient calculation module, a correction coefficient sending module, a second correction coefficient calculation module and a final correction coefficient calculation module, wherein:
the image acquisition module is connected with the first correction coefficient calculation module and the final correction coefficient calculation module; the image acquisition module is used for acquiring an initial screen display image of the LED display screen when the LED display screen is displayed at a preset gray level value, acquiring a first correction screen display image of the LED display screen after correction and acquiring a second correction screen display image of the LED display screen after correction;
the first correction coefficient calculation module is connected with the image acquisition module, the correction coefficient transmission module and the second correction coefficient calculation module; the first correction coefficient calculation module is used for generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy, and generating a first brightness correction coefficient according to the first correction screen display image and the first correction coefficient calculation strategy;
The correction coefficient sending module is connected with the first correction coefficient calculating module, the second correction coefficient calculating module and the final correction coefficient calculating module; the correction coefficient transmitting module is used for transmitting the initial brightness correction coefficient to the LED display screen, transmitting the second brightness correction coefficient to the LED display screen and transmitting the final correction coefficient of the screen to the LED display screen;
the second correction coefficient calculation module is connected with the first correction coefficient calculation module, the correction coefficient sending module and the final correction coefficient calculation module; the second correction coefficient calculation module is used for calculating the product of the initial brightness correction coefficient and the first brightness correction coefficient to serve as a second brightness correction coefficient;
the final correction coefficient calculation module is connected with the image acquisition module, the correction coefficient transmission module and the second correction coefficient calculation module; the final correction coefficient calculation module is used for generating a chromaticity correction coefficient according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy, and calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as a screen final correction coefficient.
The invention also comprises a correction system of the LED display screen, the correction system comprises the correction device, a camera, a sending device, a receiving device and the LED display screen, wherein:
A camera connected with the correction device; the camera is positioned in front of the LED display screen and is used for collecting an initial screen display image of the LED display screen when the LED display screen displays at a preset gray level value, collecting a first correction screen display image of the LED display screen after correction and collecting a second correction screen display image of the LED display screen after correction;
the correction device is connected with the camera and the sending equipment, is connected with the LED display screen through the connection between the sending equipment and the receiving equipment, and is used for acquiring an initial screen display image when the LED display screen is displayed at a preset gray level value; generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy; transmitting the initial brightness correction coefficient to the LED display screen, and acquiring a first correction screen display image displayed after the LED display screen is corrected; generating a first brightness correction coefficient according to the first correction screen display image and a first correction coefficient calculation strategy, calculating the product of the initial brightness correction coefficient and the first brightness correction coefficient as a second brightness correction coefficient, transmitting the second brightness correction coefficient to the LED display screen, and acquiring a second correction screen display image when the LED display screen is displayed after brightness correction; generating a chromaticity correction coefficient according to the display image of the second correction screen and a preset chromaticity correction coefficient calculation strategy, and calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as a final correction coefficient of the screen; transmitting the final correction coefficient of the screen to the LED display screen;
The LED display screen is connected with the receiving equipment and is connected with the correction device through the connection between the receiving equipment and the sending equipment; the LED display screen is used for displaying at a preset gray scale value, performing screen correction and displaying according to an initial brightness correction coefficient, performing screen correction and displaying according to a second brightness correction coefficient, and performing screen correction and displaying according to a final screen correction coefficient.
According to the correction method, the device and the system for the LED display screen, the initial brightness correction coefficient is generated to carry out primary brightness correction on the LED display screen, the secondary brightness correction is carried out on the LED display screen according to the product of the first brightness correction coefficient calculated by the first correction screen display image obtained after the LED display screen is corrected and the initial brightness correction coefficient, then the chromaticity correction coefficient is generated according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy, the product of the second brightness correction coefficient and the chromaticity correction coefficient is calculated to serve as a screen final correction coefficient, and the LED display screen is subjected to chromaticity correction through the screen final correction coefficient, so that the LED display screen with larger original brightness difference achieves a better brightness correction effect through the scheme, the defect that the whole screen display effect is poor due to the fact that part of the module display is too bright or too dark is overcome, the display effect of the LED display screen is guaranteed, and the viewing experience of people is improved.
Drawings
For a clearer description of embodiments of the invention or of solutions in the prior art, the drawings which are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart illustrating steps of a method for calibrating an LED display screen according to an embodiment of the present invention;
FIG. 2 is a flowchart of the steps of a method for calibrating an LED display screen according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating steps of a method for calibrating an LED display screen according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of a method for calibrating an LED display screen according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating steps of a method for calibrating an LED display screen according to an embodiment of the present invention;
FIG. 6 is a flowchart of the steps of a method for calibrating an LED display screen according to an embodiment of the present invention;
FIG. 7 is a diagram showing the structural components of a correction device for an LED display screen according to an embodiment of the present invention;
fig. 8 is a structural diagram of a correction system for an LED display screen according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The method for correcting the LED display screen in the embodiment of the invention, as shown in fig. 1, comprises the following steps:
step S1: and acquiring an initial screen display image of the LED display screen when the LED display screen is displayed at a preset gray scale value.
In the step, an initial screen display image can be obtained by shooting an LED display screen displaying a preset gray level value through a camera, and in view of the phenomena that in the background technology of the invention, the screen is excessively large in original brightness difference, an excessively bright area is excessively exposed, and an excessively dark area is also in an underexposed area, and great difficulty is brought to camera acquisition, and the like, the embodiment of the invention realizes shooting through a CCM (continuous mode) series camera, the CCM series camera has high precision, the shooting process is quick and accurate, the requirement of the invention for repeated shooting can be met, and the due image quality can be achieved.
In this embodiment, the initial screen display image is an image that is displayed by the LED display screen according to a preset gray scale value, and this embodiment does not limit the value range of the preset gray scale value, and any gray scale value in the gray scales 0-255 of the LED display screen can be selected. Preferably, in this embodiment, the preset gray level value selects the highest gray level value, that is, the gray level value is 255. The highest gray scale value is selected in the embodiment, so that the LED display screen is in the brightest display effect, and the exposure time is fastest when the camera collects the initial screen display image, so that the initial screen display image can be shot fastest.
Step S2: and generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy.
After the initial screen display image is obtained, the LED display screen is corrected for the first time, specifically, as shown in fig. 2, step S2 of this embodiment includes:
step S201: and extracting an initial brightness value of the LED display screen from the initial screen display image.
The method for extracting the luminance value of the lamp spot from the image may be implemented by using the prior art, which is not limited in this embodiment, and the initial luminance value Y1 is obtained after the step S201 is performed.
Step S202: and obtaining a target brightness value of the LED display screen when the LED display screen is displayed under a preset gray scale value.
The target brightness value in the step can be set by an operator before or during the correction of the LED display screen or recommended by upper computer software, or a group of target brightness values can be recommended according to the initial brightness value Y1 by using the existing correction software.
Step S203: and generating an initial brightness correction coefficient according to the initial brightness value, the target brightness value and the first correction coefficient calculation strategy.
The first correction coefficient calculation strategy of this embodiment selects the existing correction coefficient calculation mode, that is: correction coefficient=target luminance value/image luminance value, in this step, the image luminance value is the initial luminance value Y1 obtained in step S201, and the target luminance value is the target luminance value obtained in step S202, so the ratio of the target luminance value to the initial luminance value Y1 is directly calculated to obtain the initial luminance correction coefficient in step S203, denoted by LumiCeof 1.
Step S3 is performed after the initial luminance correction coefficient is calculated.
Step S3: and sending the initial brightness correction coefficient to the LED display screen, and acquiring a first correction screen display image displayed after the LED display screen is corrected.
And carrying out first brightness correction after the LED display screen receives the initial brightness correction coefficient, and correspondingly displaying. In general, for an LED display screen composed of modules with obvious brightness differences, an ideal correction effect cannot be achieved only by one brightness correction, so that the LED display screen needs to be corrected again after an initial brightness correction coefficient is calculated, so that a first correction screen display image of the LED display screen is obtained in this step and displayed after the first brightness correction, and likewise, the first correction screen display image obtained in this step can be obtained in the same manner as that of step S1, which is not described here again.
Step S4: and generating a first brightness correction coefficient according to the first correction screen display image and the first correction coefficient calculation strategy.
The first correction factor calculation strategy in this step is the same as the first correction factor calculation strategy in the step S2, and is also performed by the existing method: correction coefficient=target luminance value/image luminance value to calculate a first luminance correction coefficient of the first correction screen display image, the image luminance value in this step being the correction luminance value Y2 extracted from the first correction screen display image acquired in step S3.
Specifically, as shown in fig. 3, step S4 of the present embodiment includes:
step S401: and extracting the corrected brightness value of the LED display screen from the first corrected screen display image.
The corrected luminance value Y2 of the first corrected screen display image is obtained by this step.
Step S402: and obtaining a target brightness value of the LED display screen after brightness correction and display.
The target brightness value in the step is related to the brightness of the LED display screen after being corrected, and may be the same set of data as the target brightness value in the step S202, or a set of target brightness values may be recommended by the existing correction software according to the corrected brightness value Y2, that is, the target brightness value in the step may be the same as or different from the target brightness value in the step S202.
Step S403: and generating a first brightness correction coefficient according to the corrected brightness value, the target brightness value and the first correction coefficient calculation strategy.
This step is calculated by a first luminance correction coefficient=target luminance value/corrected luminance value Y2. After obtaining the first luminance correction coefficient, step S5 is continued.
Step S5: the product of the initial luminance correction coefficient and the first luminance correction coefficient is calculated as a second luminance correction coefficient.
In this embodiment, the initial luminance correction coefficient is LumiCeof1, and the first luminance correction coefficient calculated in step S4 is referred to as LumiCeof2, and if the second luminance correction coefficient is referred to as LumiCeof2', lumiCeof2' =lumiceof 1×lumiceof2. After obtaining the second luminance correction coefficient LumiCeof2', step S6 will be performed.
Step S6: and sending the second brightness correction coefficient to the LED display screen, and acquiring a second correction screen display image when the LED display screen is displayed after correction.
In combination with the example of the previous step, after the LED display screen receives the second luminance correction coefficient LumiCeof2', luminance correction is performed again (this time, the second luminance correction is performed on the LED display screen) according to the second luminance correction coefficient LumiCeof2', and display is performed, and then an image when the LED display screen is displayed after correction, that is, a second correction screen display image is obtained.
Specifically, the initial brightness value and the corrected brightness value in the embodiment of the invention are both spectral tristimulus value matrixes. For example, the number of the cells to be processed,then->
Step S7: and generating a chromaticity correction coefficient according to a second correction screen display image and a preset chromaticity correction coefficient calculation strategy.
Specifically, in step S7, a chromaticity correction coefficient is generated according to the second correction screen display image and a preset chromaticity correction coefficient calculation policy, as shown in fig. 4, and the method includes the following steps:
step S701: and extracting a tristimulus value matrix of the original color gamut space of the LED display screen from the second correction screen display image.
Step S702: and acquiring a tristimulus value matrix of the target color gamut space.
Step S703: and generating a chromaticity correction coefficient according to the tristimulus value matrix of the original color gamut space, the tristimulus value matrix of the target color gamut space and the chromaticity correction coefficient calculation strategy.
In the embodiment, step S7 is to implement chromaticity correction on the LED display screen, so as to obtain the tristimulus value matrix of the original color gamut space in the display image of the second correction screen, and obtain the tristimulus value matrix of the target color gamut space, where the target color gamut space may select CIE1931 commonly used by the existing LED. The chromaticity correction coefficient calculation strategy of this embodiment is: chromaticity correction coefficient=tristimulus value matrix of target color gamut space/tristimulus value matrix of original color gamut space, chromaticity correction coefficient is calculated by chromaticity correction coefficient calculation strategy, and the embodiment of the invention is calculated by tristimulus matrix, so that chromaticity correction coefficient can be expressed as
Step S8: and calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as a final correction coefficient of the screen.
After calculating the chromaticity correction coefficient by the above steps, the product of the second luminance correction coefficient and the chromaticity correction coefficient is calculated as a screen final correction coefficient, which is denoted by Ceof. In this embodiment, the luminance correction is performed twice by the pre-step, in which the final correction coefficient ceof=lumiceof 2' chromacoef=lumiceof 2×lumiceof1×chromacoef.
Step S9: and sending the final correction coefficient of the screen to the LED display screen.
And taking the final correction coefficient of the screen as the correction coefficient of the gray scale of the LED display screen, and correcting the gray scale of the LED display screen through the final correction coefficient of the screen.
Specifically, as shown in fig. 5, the embodiment of the present invention further includes, after performing step S6:
step S10: calculating a gray level difference value of the display image of the second correction screen according to a preset gray level difference calculation strategy, and judging whether the gray level difference value is larger than a preset gray level difference threshold value or not; if yes, go to step S11, if no, go to step S7.
As shown in fig. 6, the process of calculating the gray-scale difference value of the second correction screen display image according to the preset gray-scale difference calculation policy in step S10 may include:
Step S1001: and extracting the corrected brightness value of the LED display screen from the display image of the second corrected screen, and calculating the corrected brightness average value.
The procedure of extracting the corrected luminance value of the LED display screen from the second corrected screen display image in this step approximates to that of extracting the initial luminance value of the LED display screen from the initial screen display image in step S201. The second correction screen display image in this embodiment is obtained by displaying the LED display screen after two luminance corrections, and in this embodiment, the extracted correction luminance value is denoted as Y3, and the calculated correction luminance average value is denoted as AVG.
Step S1002: the highest gray level value and the lowest gray level value in the corrected brightness values are found out.
The highest gray-scale value and the lowest gray-scale value from the corrected luminance value Y3 are denoted by MAX and MIN, respectively.
Step S1003: and calculating a gray level difference value according to the gray level difference calculation strategy, the highest gray level value, the lowest gray level value and the corrected brightness average value.
The gray level difference calculation strategy of this embodiment may include:
gray level difference value= (highest gray level value-lowest gray level value)/corrected luminance average value is 100%.
The gray level difference value of this step is calculated by gray level difference value= (MAX-MIN)/avg×100%.
Comparing the gray level difference value with a preset gray level difference threshold, and executing step S11 if the gray level difference value is larger than the preset gray level difference threshold. If the gray level difference value is smaller than or equal to the preset gray level difference threshold, step S7 is executed.
The gray level difference threshold in this embodiment is used to measure whether the brightness correction effect of the LED display screen reaches the due effect, and the gray level difference threshold can be set by a person skilled in the art according to the requirement for the correction effect, for example, the gray level difference threshold is set to 30%, if the gray level difference value is greater than 30%, step S11 is executed, and if the gray level difference value is less than or equal to 30%, step S7 is executed.
Step S11: and generating a new first brightness correction coefficient according to the second correction screen display image and the first correction coefficient calculation strategy.
The calculation in this step adopts the same method as in step S4, and adopts the same first correction coefficient calculation strategy to calculate a new first luminance correction coefficient, denoted as LumiCeof3, from the corrected luminance value Y3.
Step S12: and calculating the product of the second brightness correction coefficient and the new first brightness correction coefficient as a third brightness correction coefficient.
The third luminance correction coefficient is denoted as LumiCeof3', lumiCeof3' =lumiceof 3 =lumiceof 2 ×lumiceof1.
Step S13: and correcting the LED display screen according to the third brightness correction coefficient, and acquiring a third correction screen display image when the LED display screen is displayed after correction.
The implementation of this step is similar to step S6 of this embodiment, and will not be described here too much.
Step S14: and generating a chromaticity correction coefficient according to the third correction screen display image and a preset chromaticity correction coefficient calculation strategy.
This step may refer to step S7 in the foregoing embodiment for the generation of the chromaticity correction coefficient, but the second correction screen display image in step S7 may be replaced with the third correction screen display image, which is not described here too much.
Step S15: and calculating the product of the third brightness correction coefficient and the chromaticity correction coefficient as a final correction coefficient of the screen.
Also, this step is implemented similarly to step S8 of the previous embodiment, and the screen final correction coefficient is denoted by Ceof. The present embodiment achieves three luminance corrections by the preceding step, in which the final correction coefficient ceof=lumiceof 3' chromacoef=lumiceof 3 x LumiCeof2 x LumiCeof1 x ChromaCoef.
Step S9: and sending the final correction coefficient of the screen to the LED display screen.
And taking the final correction coefficient of the screen as the correction coefficient of the gray scale of the LED display screen, and correcting the gray scale of the LED display screen through the final correction coefficient of the screen.
According to the embodiment of the invention, the chromaticity correction is performed after the LED display screen is subjected to three-time brightness correction, and the effect after the second brightness correction is evaluated, so that the brightness is corrected again under the condition of not meeting the threshold requirement, and the brightness correction effect of the LED display screen is ensured.
According to the invention, on the basis of the embodiment, the brightness correction can be performed for a plurality of iterations, for example, after the third brightness correction is performed on the LED display screen, a corresponding fourth corrected screen display image is obtained, the corresponding gray level difference value is calculated, meanwhile, the magnitude relation between the gray level difference value and the preset gray level difference threshold value is judged, if the gray level difference value is smaller than or equal to the preset gray level difference threshold value, the brightness correction requirement is met, the relevant step of the gray level correction is performed, and if the gray level difference value is larger than the preset gray level difference threshold value, the brightness correction is performed for the LED display screen for a plurality of times in a mode similar to the steps S10 to S13.
After the third brightness correction is performed according to LumiCeof3', if the gray level difference value of the display image of the fourth correction screen is still greater than the gray level difference threshold, calculating a new first brightness correction coefficient corresponding to the fourth correction again to be LumiCeof4, and recording the fourth brightness correction coefficient as LumiCeof4', lumiCeof4 '=lumiceof 4×lumiceof3' =lumiceof 4×lumiceof3×lumiceof2×lumiceof1.
By the correction method for the LED display screen, for a common LED display screen, due display effect can be achieved through 2-3 times of brightness correction, and due display effect can also be achieved after multiple times of correction for the LED display screen with larger brightness difference of part of modules. And gray scale correction is performed after brightness correction, so that the LED display screen achieves better display effect.
The embodiment of the invention also includes a correction device for an LED display screen, as shown in fig. 7, the correction device 10 includes an image acquisition module 101, a first correction coefficient calculation module 102, a correction coefficient transmission module 103, a second correction coefficient calculation module 104, and a final correction coefficient calculation module 105, where:
the image acquisition module 101 is connected with the first correction coefficient calculation module 102 and the final correction coefficient calculation module 105; the image acquisition module 101 is configured to acquire an initial screen display image when the LED display screen displays at a preset gray-scale value, acquire a first corrected screen display image when the LED display screen displays after correction, and acquire a second corrected screen display image when the LED display screen displays after correction;
the first correction coefficient calculation module 102 is connected with the image acquisition module 101, the correction coefficient transmission module 103 and the second correction coefficient calculation module 104; the first correction coefficient calculating module 102 is configured to generate an initial luminance correction coefficient according to the initial screen display image and a preset first correction coefficient calculating strategy, and generate a first luminance correction coefficient according to the first correction screen display image and the first correction coefficient calculating strategy;
The correction coefficient transmitting module 103 is connected with the first correction coefficient calculating module 102, the second correction coefficient calculating module 104 and the final correction coefficient calculating module 105; the correction coefficient transmitting module 103 is used for transmitting the initial brightness correction coefficient to the LED display screen, transmitting the second brightness correction coefficient to the LED display screen and transmitting the final correction coefficient of the screen to the LED display screen;
the second correction coefficient calculation module 104 is connected with the first correction coefficient calculation module 102, the correction coefficient transmission module 103 and the final correction coefficient calculation module 105; the second correction coefficient calculating module 104 is configured to calculate a product of the initial luminance correction coefficient and the first luminance correction coefficient as a second luminance correction coefficient;
the final correction coefficient calculation module 105 is connected with the image acquisition module 101, the correction coefficient transmission module 103 and the second correction coefficient calculation module 104; the final correction coefficient calculation module 105 is configured to generate a chromaticity correction coefficient according to the second correction screen display image and a preset chromaticity correction coefficient calculation policy, and calculate a product of the second luminance correction coefficient and the chromaticity correction coefficient as a screen final correction coefficient.
The functional implementation of the correction device according to the embodiment of the present invention may refer to the description of the steps of the correction method for the LED display screen according to the foregoing embodiment, which will not be repeated herein.
The embodiment of the invention further includes a correction system for an LED display screen, as shown in fig. 8, where the correction system includes the correction device 10 of the above embodiment, and further includes a camera 20, a transmitting device 30, a receiving device 40, and an LED display screen 50, where:
a camera 20 connected to the correction device 10; the camera 20 is located in front of the LED display screen 50, and the camera 20 is configured to collect an initial screen display image of the LED display screen 50 when displayed at a preset gray level value, collect a first correction screen display image of the LED display screen 50 when displayed after correction, and collect a second correction screen display image of the LED display screen 50 when displayed after correction;
the correction device 10 is connected with the camera 20 and the sending equipment 30, and is connected with the LED display screen 50 through the connection between the sending equipment 30 and the receiving equipment 40, and the correction device 10 is used for acquiring an initial screen display image when the LED display screen 50 displays at a preset gray scale value; generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy; transmitting the initial brightness correction coefficient to the LED display screen 50, and acquiring a first correction screen display image displayed after the LED display screen 50 is corrected; generating a first brightness correction coefficient according to the first correction screen display image and a first correction coefficient calculation strategy, calculating the product of the initial brightness correction coefficient and the first brightness correction coefficient as a second brightness correction coefficient, transmitting the second brightness correction coefficient to the LED display screen 50, and acquiring a second correction screen display image when the LED display screen 50 displays after brightness correction; generating a chromaticity correction coefficient according to the display image of the second correction screen and a preset chromaticity correction coefficient calculation strategy, and calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as a final correction coefficient of the screen; and transmitting the screen final correction coefficients to the LED display screen 50;
The LED display screen 50 is connected with the receiving equipment 40, and is connected with the correction device 10 through the connection between the receiving equipment 40 and the sending equipment 30; the LED display screen 50 is used for performing display at a preset gray-scale value, performing screen correction and display according to an initial brightness correction coefficient, performing screen correction and display according to a second brightness correction coefficient, and performing screen correction and display according to a screen final correction coefficient.
The correction system of the embodiment of the present invention may be implemented by the correction method of the LED display screen and the related description of the correction device in the foregoing embodiment, which will not be repeated here.
According to the correction method, the device and the system for the LED display screen, the initial brightness correction coefficient is generated to carry out primary brightness correction on the LED display screen, the secondary brightness correction is carried out on the LED display screen according to the product of the first brightness correction coefficient calculated by the first correction screen display image obtained after the LED display screen is corrected and the initial brightness correction coefficient, then the chromaticity correction coefficient is generated according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy, the product of the second brightness correction coefficient and the chromaticity correction coefficient is calculated to serve as a screen final correction coefficient, the LED display screen is subjected to chromaticity correction through the screen final correction coefficient, so that the LED display screen with larger original brightness difference achieves a better brightness correction effect through the scheme, the defect that the whole screen display effect is poor due to the fact that part of the module display is too bright or too dark is overcome, the display effect of the LED display screen is guaranteed, and the viewing experience of people is improved.
The invention has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the invention, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.

Claims (8)

1. A method for calibrating an LED display screen, comprising:
acquiring an initial screen display image of the LED display screen when the LED display screen is displayed at a preset gray scale value;
generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy;
transmitting the initial brightness correction coefficient to an LED display screen, and acquiring a first correction screen display image displayed after the LED display screen is corrected;
generating a first brightness correction coefficient according to the first correction screen display image and the first correction coefficient calculation strategy;
calculating the product of the initial brightness correction coefficient and the first brightness correction coefficient as a second brightness correction coefficient;
transmitting the second brightness correction coefficient to an LED display screen, and acquiring a second correction screen display image displayed after the LED display screen is corrected;
Generating a chromaticity correction coefficient according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy;
calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as a screen final correction coefficient;
transmitting the final correction coefficient of the screen to the LED display screen;
wherein,
the generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy comprises the following steps:
extracting an initial brightness value of the LED display screen from the initial screen display image;
obtaining a target brightness value of the LED display screen when the LED display screen is displayed under a preset gray scale value;
generating an initial brightness correction coefficient according to the initial brightness value, the target brightness value and the first correction coefficient calculation strategy;
generating a chromaticity correction coefficient according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy, wherein the chromaticity correction coefficient generation method comprises the following steps:
extracting a tristimulus value matrix of an original color gamut space of the LED display screen from the second correction screen display image;
acquiring a tristimulus value matrix of a target color gamut space;
generating a chromaticity correction coefficient according to the tristimulus value matrix of the original color gamut space, the tristimulus value matrix of the target color gamut space and the chromaticity correction coefficient calculation strategy;
The first correction factor calculation strategy is: initial luminance correction coefficient=target luminance value/initial luminance value;
the chromaticity correction coefficient calculation strategy is: chromaticity correction coefficient = tristimulus value matrix of target color gamut space/tristimulus value matrix of original color gamut space.
2. The method for calibrating an LED display of claim 1, further comprising:
calculating a gray level difference value of the display image of the second correction screen according to a preset gray level difference calculation strategy, and judging whether the gray level difference value is larger than a preset gray level difference threshold value or not; if yes, then
Generating a new first brightness correction coefficient according to the second correction screen display image and the first correction coefficient calculation strategy;
calculating the product of the second brightness correction coefficient and the new first brightness correction coefficient as a third brightness correction coefficient;
correcting the LED display screen according to the third brightness correction coefficient, and acquiring a third correction screen display image displayed after the correction of the LED display screen;
generating a chromaticity correction coefficient according to the third correction screen display image and a preset chromaticity correction coefficient calculation strategy;
calculating the product of the third brightness correction coefficient and the chromaticity correction coefficient as a screen final correction coefficient;
And sending the final correction coefficient of the screen to the LED display screen.
3. The method for correcting an LED display screen according to claim 2, wherein calculating a gray-scale difference value of the second correction screen display image according to a preset gray-scale difference calculation strategy comprises:
extracting a corrected brightness value of the LED display screen from the second corrected screen display image, and calculating a corrected brightness average value;
finding out the highest gray scale value and the lowest gray scale value in the corrected brightness values;
and calculating a gray level difference value according to the gray level difference calculation strategy, the highest gray level value, the lowest gray level value and the corrected brightness average value.
4. The method for calibrating an LED display of claim 3, wherein the gray scale difference calculation strategy comprises:
gray level difference value= (highest gray level value-lowest gray level value)/corrected luminance average value is 100%.
5. The method of calibrating an LED display of claim 1, wherein the initial luminance value and the corrected luminance value are each a matrix of spectral tristimulus values.
6. The method of calibrating an LED display of claim 1, wherein the initial luminance value and the corrected luminance value are each a matrix of spectral tristimulus values.
7. The correction device of the LED display screen is characterized by comprising an image acquisition module, a first correction coefficient calculation module, a correction coefficient sending module, a second correction coefficient calculation module and a final correction coefficient calculation module, wherein:
the image acquisition module is connected with the first correction coefficient calculation module and the final correction coefficient calculation module; the image acquisition module is used for acquiring an initial screen display image of the LED display screen when the LED display screen is displayed at a preset gray level value, acquiring a first correction screen display image of the LED display screen after correction and acquiring a second correction screen display image of the LED display screen after correction;
the first correction coefficient calculation module is connected with the image acquisition module, the correction coefficient sending module and the second correction coefficient calculation module; the first correction coefficient calculation module is used for generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy, and generating a first brightness correction coefficient according to the first correction screen display image and the first correction coefficient calculation strategy;
The correction coefficient sending module is connected with the first correction coefficient calculating module, the second correction coefficient calculating module and the final correction coefficient calculating module; the correction coefficient transmitting module is used for transmitting the initial brightness correction coefficient to the LED display screen, transmitting the second brightness correction coefficient to the LED display screen and transmitting the final correction coefficient of the screen to the LED display screen;
the second correction coefficient calculation module is connected with the first correction coefficient calculation module, the correction coefficient sending module and the final correction coefficient calculation module; the second correction coefficient calculation module is used for calculating the product of the initial brightness correction coefficient and the first brightness correction coefficient as a second brightness correction coefficient;
the final correction coefficient calculation module is connected with the image acquisition module, the correction coefficient sending module and the second correction coefficient calculation module; the final correction coefficient calculation module is used for generating a chromaticity correction coefficient according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy, and calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as the screen final correction coefficient;
The first correction coefficient calculation module generates an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy, and the first correction coefficient calculation module comprises the following steps:
extracting an initial brightness value of the LED display screen from the initial screen display image;
obtaining a target brightness value of the LED display screen when the LED display screen is displayed under a preset gray scale value;
generating an initial brightness correction coefficient according to the initial brightness value, the target brightness value and the first correction coefficient calculation strategy;
the final correction coefficient calculation module generates a chromaticity correction coefficient according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy, and the final correction coefficient calculation module comprises:
extracting a tristimulus value matrix of an original color gamut space of the LED display screen from the second correction screen display image;
acquiring a tristimulus value matrix of a target color gamut space;
generating a chromaticity correction coefficient according to the tristimulus value matrix of the original color gamut space, the tristimulus value matrix of the target color gamut space and the chromaticity correction coefficient calculation strategy;
the first correction factor calculation strategy is: initial luminance correction coefficient=target luminance value/initial luminance value;
the chromaticity correction coefficient calculation strategy is: chromaticity correction coefficient = tristimulus value matrix of target color gamut space/tristimulus value matrix of original color gamut space.
8. A correction system for an LED display screen, the correction system comprising the correction apparatus of claim 7, further comprising a camera, a transmitting device, a receiving device, and an LED display screen, wherein:
the camera is connected with the correction device; the camera is positioned in front of the LED display screen, and is used for collecting an initial screen display image of the LED display screen when the LED display screen is displayed under a preset gray scale value, collecting a first correction screen display image of the LED display screen after correction and collecting a second correction screen display image of the LED display screen after correction;
the correction device is connected with the camera and the sending equipment, is connected with the LED display screen through the connection between the sending equipment and the receiving equipment, and is used for acquiring an initial screen display image when the LED display screen is displayed at a preset gray scale value; generating an initial brightness correction coefficient according to the initial screen display image and a preset first correction coefficient calculation strategy; transmitting the initial brightness correction coefficient to an LED display screen, and acquiring a first correction screen display image displayed after correction of the LED display screen; generating a first brightness correction coefficient according to the first correction screen display image and the first correction coefficient calculation strategy, calculating the product of the initial brightness correction coefficient and the first brightness correction coefficient to be used as a second brightness correction coefficient, sending the second brightness correction coefficient to an LED display screen, and acquiring a second correction screen display image when the LED display screen is displayed after correction; generating a chromaticity correction coefficient according to the second correction screen display image and a preset chromaticity correction coefficient calculation strategy, and calculating the product of the second brightness correction coefficient and the chromaticity correction coefficient as a screen final correction coefficient; transmitting the final correction coefficient of the screen to an LED display screen;
The LED display screen is connected with the receiving equipment and is connected with the correction device through the connection between the receiving equipment and the sending equipment; the LED display screen is used for displaying under a preset gray scale value, carrying out screen correction and displaying according to the initial brightness correction coefficient, carrying out screen correction and displaying according to the second brightness correction coefficient, and carrying out screen correction and displaying according to the final screen correction coefficient.
CN202210332630.3A 2022-03-30 2022-03-30 Correction method, device and system for LED display screen Active CN114677958B (en)

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Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101305600A (en) * 2005-11-07 2008-11-12 松下电器产业株式会社 Wipe pattern generation device
JP2009053217A (en) * 2007-08-23 2009-03-12 Canon Inc Image processing apparatus and image display device
JP2009206836A (en) * 2008-02-27 2009-09-10 ▲ぎょく▼瀚科技股▲ふん▼有限公司 System and method for adjusting color image quality
WO2011125112A1 (en) * 2010-04-05 2011-10-13 パナソニック株式会社 Organic el display device manufacturing method and organic el display device
CN104332133A (en) * 2014-05-07 2015-02-04 长春希达电子技术有限公司 Splicing seam brightness compensation and adjustment method for high-density LED display screen
CN104464634A (en) * 2014-12-25 2015-03-25 西安诺瓦电子科技有限公司 LED correction effect checking method and relevant correction method and device
CN105185315A (en) * 2015-10-13 2015-12-23 西安诺瓦电子科技有限公司 Uniformity correction method for LED display screen
WO2018084516A1 (en) * 2016-11-04 2018-05-11 삼성전자주식회사 Electronic device, display apparatus, and control method thereof
CN109637434A (en) * 2018-12-29 2019-04-16 深圳市奥拓电子股份有限公司 Bearing calibration, correction system and the machine readable storage medium of mosaic display screen
CN111261079A (en) * 2020-03-27 2020-06-09 深圳市洲明科技股份有限公司 Detection method for abnormal phenomena of bright spots and dark spots
CN111402825A (en) * 2020-03-31 2020-07-10 浙江宇视科技有限公司 Screen correction method, device and system and logic board
CN112669758A (en) * 2019-09-29 2021-04-16 西安诺瓦星云科技股份有限公司 Display screen correction method, device, system and computer readable storage medium
CN112967669A (en) * 2021-03-02 2021-06-15 长春希达电子技术有限公司 Correction method for improving gray scale consistency of LED display screen
WO2021196036A1 (en) * 2020-03-31 2021-10-07 西安诺瓦星云科技股份有限公司 System, method and apparatus for image processing
CN114170941A (en) * 2021-12-09 2022-03-11 惠州华星光电显示有限公司 Display brightness matching method and display

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3808788B2 (en) * 2002-03-12 2006-08-16 株式会社東芝 Liquid crystal display method
KR100885285B1 (en) * 2007-05-08 2009-02-23 닛뽕빅터 가부시키가이샤 Liquid crystal display apparatus and image display method used therein
KR101998712B1 (en) * 2013-03-25 2019-10-02 삼성디스플레이 주식회사 Display device, data processing device for the same and method thereof

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101305600A (en) * 2005-11-07 2008-11-12 松下电器产业株式会社 Wipe pattern generation device
JP2009053217A (en) * 2007-08-23 2009-03-12 Canon Inc Image processing apparatus and image display device
JP2009206836A (en) * 2008-02-27 2009-09-10 ▲ぎょく▼瀚科技股▲ふん▼有限公司 System and method for adjusting color image quality
WO2011125112A1 (en) * 2010-04-05 2011-10-13 パナソニック株式会社 Organic el display device manufacturing method and organic el display device
CN104332133A (en) * 2014-05-07 2015-02-04 长春希达电子技术有限公司 Splicing seam brightness compensation and adjustment method for high-density LED display screen
CN104464634A (en) * 2014-12-25 2015-03-25 西安诺瓦电子科技有限公司 LED correction effect checking method and relevant correction method and device
CN105185315A (en) * 2015-10-13 2015-12-23 西安诺瓦电子科技有限公司 Uniformity correction method for LED display screen
WO2018084516A1 (en) * 2016-11-04 2018-05-11 삼성전자주식회사 Electronic device, display apparatus, and control method thereof
CN109637434A (en) * 2018-12-29 2019-04-16 深圳市奥拓电子股份有限公司 Bearing calibration, correction system and the machine readable storage medium of mosaic display screen
CN112669758A (en) * 2019-09-29 2021-04-16 西安诺瓦星云科技股份有限公司 Display screen correction method, device, system and computer readable storage medium
CN111261079A (en) * 2020-03-27 2020-06-09 深圳市洲明科技股份有限公司 Detection method for abnormal phenomena of bright spots and dark spots
CN111402825A (en) * 2020-03-31 2020-07-10 浙江宇视科技有限公司 Screen correction method, device and system and logic board
WO2021196036A1 (en) * 2020-03-31 2021-10-07 西安诺瓦星云科技股份有限公司 System, method and apparatus for image processing
CN112967669A (en) * 2021-03-02 2021-06-15 长春希达电子技术有限公司 Correction method for improving gray scale consistency of LED display screen
CN114170941A (en) * 2021-12-09 2022-03-11 惠州华星光电显示有限公司 Display brightness matching method and display

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LED显示屏的色域校正;赵梓权;王瑞光;郑喜凤;汪洋;;液晶与显示(01);95-101 *

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