CN112542132A - LED display screen single-box correction optical parameter consistency correction method - Google Patents

LED display screen single-box correction optical parameter consistency correction method Download PDF

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CN112542132A
CN112542132A CN202011285234.7A CN202011285234A CN112542132A CN 112542132 A CN112542132 A CN 112542132A CN 202011285234 A CN202011285234 A CN 202011285234A CN 112542132 A CN112542132 A CN 112542132A
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box body
corrected
brightness
box
correction
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郭贵新
陆文文
曹慧
苗静
丁铁夫
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Changchun Cedar Electronics 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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Abstract

The invention relates to a method for correcting the consistency of optical parameters of single box correction of an LED display screen, which adopts a reference box body mode, wherein the brightness and chromaticity target of each box body to be corrected is consistent with that of the reference box body, and the reference box body plays a role in transmitting brightness and chromaticity information, thereby achieving the purpose of consistent brightness and color of all corrected unit box bodies. The modified unit boxes are consistent with the reference box in color and brightness, and the reference box is not changed in shape from beginning to end, so that the brightness and color consistency of all the corrected unit boxes can be ensured. The invention abandons the limitation of a brightness meter with high price, and has large extractable integral area and high calculation precision when the camera shoots. And the luminance meter is only the area of an integral area in a fixed visual angle and has small area.

Description

LED display screen single-box correction optical parameter consistency correction method
Technical Field
The invention belongs to the technical field of optical acquisition and correction of LED display screens, and relates to a single-box correction optical parameter consistency correction method for an LED display screen.
Background
The LED display screen is composed of many light emitting chips, and the light emitting chips have differences in optical parameters due to manufacturing processes, and the optical parameters are mainly differences in brightness and color. Therefore, the problem that the brightness and the chromaticity of the LED display screen are inconsistent is caused, and the visual perception of people is influenced. The brightness and the chromaticity of the LED display screen need to be corrected, so that the purpose that the brightness and the color of all pixel points of the full screen are consistent is achieved. The brightness and chroma correction means is a mature technical scheme in the industry at present. The LED display screen is composed of a plurality of box bodies, and one box body is composed of a plurality of modules. Two modes are often adopted in the industry for correcting the display screen, wherein the first mode is that after a plurality of boxes of the full screen are built, a camera shoots an area formed by the boxes at one time to perform full screen correction operation. The second mode is to correct a single box or module at a time, and the box or module after correction is built on site. The advantage of the first kind of correction mode is that disposable correction box or module quantity is many, save time, but need whole screen built in the factory, consumes manpower and materials. The second correction mode has the advantages that manual construction in a factory is not needed, only a plurality of stations are needed to correct the unit box body, and the site box body can be constructed in any order and can be exchanged at any position. The single-box correction link can enable the interior of each box body to achieve the purpose of consistent brightness and chroma, but for different box bodies, due to the relativity of the acquisition equipment, the single-box correction link is not a brightness value which can be absolutely measured by a brightness meter, and brightness and color differences exist between different box bodies. At present, a color brightness meter is commonly used in the industry for secondary measurement so as to ensure that the brightness and the color of each box body which is subjected to single-box correction are consistent. However, brightness meters belong to high-precision equipment, the manufacturing cost and the maintenance cost are high, multiple brightness meters need to be matched with multiple correction stations, the cost is high, and the universality is not strong. Therefore, the method for correcting the optical parameter consistency between the single-box correction boxes which is suitable for popularization and low in price and can replace the measurement of the brightness meter is needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for correcting the consistency of optical parameters of single-box correction of an LED display screen, which can solve the problem of inconsistent brightness and chrominance among box bodies after single-box correction.
The LED display screen single-box correction optical parameter consistency correction method adopts the following two technical schemes.
The technical scheme is that I;
firstly, performing preliminary brightness correction on each unit box body for splicing the LED display screen to ensure that the brightness inside each unit box body is uniform; taking the unit box body subjected to the preliminary brightness correction as a box body to be corrected; at the moment, the correction coefficient of each LED pixel in the unit box body is used as a brightness preliminary correction coefficient; when the reference box body displays a single primary color and the box body to be corrected respectively displays red, green and blue colors, a camera is used for collecting images of the box body to be corrected and the reference box body; respectively extracting the brightness values of the box body to be corrected and the reference box body in the three images to obtain a reference box body brightness matrix YtargetAnd the brightness matrix Y of the box body to be correctedpro；
Calculating a brightness correction matrix [ coeff ] of the box body to be corrected according to a formula (1)]1；
[coeff]1＝[Ytarget]×[Ypro]-1 (1)
Uploading the brightness correction matrix to a driving circuit of the box body to be corrected, and multiplying the brightness correction matrix by a brightness preliminary correction coefficient of each LED pixel in the box body to be corrected to finish the brightness uniformity correction of the box body to be corrected;
and repeating the process to finish the brightness uniformity correction of all the unit box bodies for the spliced LED display screen.
The second technical scheme is as follows:
carrying out primary brightness correction on each unit box body for the spliced LED display screen to ensure that the brightness inside each unit box body is uniform; taking the unit box body subjected to the preliminary brightness and chroma correction as a box body to be corrected; at the moment, the brightness and chrominance correction coefficient of each LED pixel in the unit box body is used as a brightness and chrominance preliminary correction coefficient; when the reference box body displays a single primary color and the box body to be corrected respectively displays red, green and blue colors, the camera is used for collecting the pictures of the box body to be corrected and the reference box bodyAn image; respectively extracting the brightness values of the box body to be corrected and the reference box body in the three images to obtain a reference box body brightness matrix YtargetAnd the brightness matrix Y of the box body to be correctedpro(ii) a When all the LED pixels of the two unit boxes simultaneously display red, green and blue respectively, the two unit boxes are photographed by a camera at the same time to obtain images of the two unit boxes simultaneously displaying red, green and blue;
respectively extracting X stimulus value matrix and Z stimulus value matrix of each single primary color corresponding to the box body to be corrected and the reference box body in the image, and using the reference box body Y to obtain the X stimulus value matrix and the Z stimulus value matrixtargetThe stimulus value matrix and the X stimulus value matrix and the Z stimulus value matrix of each single primary color corresponding to the reference box form a tristimulus value matrix of the reference box; box body Y to be correctedproThe stimulus value matrix and the X stimulus value matrix and the Z stimulus value matrix of each single base color corresponding to the box body to be corrected form a tri-stimulus value matrix of the box body to be corrected; let XYZtargetTristimulus value matrix, XYZ, for reference boxproThe tristimulus value matrix of the box body to be corrected is obtained;
Figure RE-RE-RE-RE-GDA0002923047820000031
Figure RE-RE-RE-RE-GDA0002923047820000032
wherein RXa、RYa、RZaIndicating the tristimulus value, GX, of the reference box when it is reda、GYa、GZaIndicating the tristimulus value, BX, of the reference box when it is greena、BYa、BZaIndicating the tristimulus value of the reference box when it is blue; RXb、 RYb、RZbIndicating the tristimulus value, GX, of the box to be corrected when it shows redb、GYb、GZbIndicating the tristimulus value, BX, of the box to be corrected when it is greenb、BYb、BZbRepresenting the tristimulus value of the box body to be corrected when the box body to be corrected displays blue;
calculating a color gamut conversion matrix [ coeff ] of each box body to be corrected according to a formula (2)]2；
[coeff]2＝[XYZtarget]*[XYZpro]-1 (2)
And uploading the color gamut conversion matrix of the box body to be corrected to a driving circuit of the box body to be corrected, and multiplying the color gamut conversion matrix by the initial brightness correction coefficient matrix of the box body to be corrected to finish the brightness uniformity correction of the box body to be corrected.
Preferably, the integrated value of the set area in the reference box is extracted to represent the brightness value of the reference box.
Preferably, the integral value of the set area in the box body to be corrected is extracted to represent the chromaticity information of the box body to be corrected.
Preferably, the single primary color displayed by the reference box is green.
In order to ensure that the color gamut of all the boxes to be corrected is within the color gamut range of the reference box, the color gamut of the reference box can be properly reduced.
The uniformity of the brightness and the color of the inside of each corrected unit box body can be achieved through the single-box corrected unit box bodies, but the brightness and the color have certain difference among different unit box bodies, and the difference is particularly obvious on a COB packaged display screen. This is because COB display screen luminescent chip can not mix the stirring, and direct solid brilliant can lead to the difference of luminance colour degree between the module, if the inside dark piece of a unit box is more, luminance will be on the low side after this box is rectified, otherwise then luminance is on the bright side. Therefore, brightness difference exists between different unit boxes, and a brightness meter is often used in the industry to measure absolute values so as to ensure that all the unit boxes achieve the same brightness and chromaticity target. The invention adopts a reference box body mode, the brightness and the chromaticity target of each box body to be corrected are consistent with those of the reference box body, and the reference box body plays a role of transmitting brightness and chromaticity information, thereby achieving the aim of consistent brightness and color of all corrected unit box bodies. The modified unit boxes are consistent with the reference box in color and brightness, and the reference box is not changed in shape from beginning to end, so that the brightness and color consistency of all the corrected unit boxes can be ensured. The invention abandons the limitation of a brightness meter with high price, and has large extractable integral area and high calculation precision when the camera shoots. And the luminance meter is only the area of an integral area in a fixed visual angle and has small area.
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The invention is described in further detail below with reference to the figures and specific examples.
FIG. 1 is a flowchart of example 1 of the present invention.
Fig. 2 is a flowchart of embodiment 2 of the present invention.
Fig. 3 is a schematic diagram of two unit boxes simultaneously lighting up when RY data is collected.
Fig. 4 is a schematic diagram showing that two unit cases are simultaneously lighted when GY data is collected.
Fig. 5 is a schematic diagram showing that two unit cases are simultaneously lighted when BY data is collected.
Fig. 6 is a schematic view showing two unit cases simultaneously displaying red color.
Fig. 7 is a schematic view showing two unit cases simultaneously displaying green color.
Fig. 8 is a schematic view showing two unit cases simultaneously displaying blue.
Detailed Description
Example one
In this embodiment: luminance uniformity correction
If the unit box body does not have the chromaticity problem, when the uniform and consistent display effect can be achieved only by brightness correction, the brightness of all the single-box corrected unit box bodies can be ensured to be consistent only by brightness consistency correction.
As shown in fig. 1, the method for correcting the consistency of the optical parameters of the single-box correction of the LED display screen of the present invention has the following steps;
the method comprises the following steps: correcting a single box; the brightness of each unit box body for splicing the LED display screen is preliminarily corrected by adopting the conventional brightness correction method, so that the brightness in each unit box body is uniform; taking the unit box body subjected to the preliminary brightness correction as a box body to be corrected; and at the moment, the correction coefficient of each LED pixel in the unit box body is used as a brightness preliminary correction coefficient.
Step two: collecting by a camera; simultaneously lighting the box body to be corrected and the reference box body, when the reference box body displays green and the box body to be corrected respectively displays red, green and blue, collecting images of the box body to be corrected and the reference box body by using a camera, as shown in figures 3, 4 and 5; the reference box body can be one of the unit box bodies which are used for splicing the LED display screen and subjected to preliminary brightness correction, and can also be an independent unit box body subjected to brightness correction.
Step three: and extracting and processing brightness data. And respectively extracting the brightness values of the box body to be corrected and the reference box body in the three images collected in the step two. Because the box body to be corrected and the reference box body are unit box bodies subjected to preliminary brightness correction, the brightness values of any positions in the unit box bodies are almost the same. Therefore, the box body to be corrected and the reference box body are respectively represented by one brightness value; the integral value of the set area in each reference box can be extracted to represent the brightness value of the reference box, and the red brightness value is RYaIndicating green brightness by GYaIndicating blue brightness BYaRepresents; extracting an integral value of the set area in each box body to be corrected to represent the brightness value of the box body to be corrected, and using RY as the red brightness valuebIndicating green brightness by GYbIndicating blue brightness BYbRepresents; y istargetFor reference to the box luminance matrix, YproThe box brightness matrix to be corrected.
Figure RE-RE-RE-RE-GDA0002923047820000051
Figure RE-RE-RE-RE-GDA0002923047820000052
Step four: calculating a brightness correction matrix [ coeff ] of the box body to be corrected according to a formula (1)]1；
[coeff]1×[Ypro]＝[Ytarget]
[coeff]1＝[Ytarget]×[Ypro]-1 (1)
Step five: and uploading the brightness correction matrix to a driving circuit of the box body to be corrected, and multiplying the brightness correction matrix by the brightness preliminary correction coefficient of each LED pixel in the box body to be corrected to finish the brightness uniformity correction of the box body to be corrected.
And repeating the second step and the fifth step to finish the brightness uniformity correction of all the unit box bodies for the spliced LED display screen.
Example two
In this embodiment: luminance and chrominance uniformity correction
If the unit box body has the chromaticity problem, the uniform and consistent display effect in the unit box body can be achieved only through chromaticity correction, and then the unit box body needs to be subjected to the consistent correction of the brightness and the chromaticity.
As shown in FIG. 2, the method for correcting the consistency of the optical parameters of the LED display screen by single box correction comprises the following specific implementation steps
The following were used:
the method comprises the following steps: correcting a single box; the brightness and chroma of each unit box body for the spliced LED display screen are preliminarily corrected by adopting the conventional brightness and chroma correction method, so that the brightness and chroma in each unit box body are uniform and consistent; taking the unit box body subjected to the preliminary brightness and chroma correction as a box body to be corrected; and at the moment, the brightness and chrominance correction coefficient of each LED pixel in the unit box body is used as a brightness and chrominance preliminary correction coefficient.
Step two: collecting by a camera; simultaneously lighting the box body to be corrected and the reference box body, when the reference box body displays green and the box body to be corrected respectively displays red, green and blue, acquiring images of the box body to be corrected and the reference box body by using a camera, wherein the images are respectively shown in figures 3, 4 and 5; the reference box body can be one of the unit box bodies which are used for splicing the LED display screen and subjected to brightness and chrominance preliminary correction, and can also be an independent unit box body subjected to brightness and chrominance correction.
Step three: and extracting and processing brightness data. And respectively extracting the brightness values of the box body to be corrected and the reference box body in the three images collected in the step two. Due to the box body to be corrected and the reference box bodyThe luminance values of any positions in the unit box body are almost the same. Therefore, the box body to be corrected and the reference box body are respectively represented by one brightness value; the integral value of the set area in each reference box can be extracted to represent the brightness value of the reference box, and the red brightness value is RYaIndicating green brightness by GYaIndicating blue brightness BYaRepresents; extracting an integral value of the set area in each box body to be corrected to represent the brightness value of the box body to be corrected, and using RY as the red brightness valuebIndicating green brightness value by GYbIndicating that the blue brightness value is BYbRepresents; y istargetFor reference to the box luminance matrix, YproThe box brightness matrix to be corrected.
Figure RE-RE-RE-RE-GDA0002923047820000061
Figure RE-RE-RE-RE-GDA0002923047820000062
Step four: and (5) camera acquisition. Simultaneously lighting the box body to be corrected and the reference box body, and simultaneously displaying red, green and blue on all LED pixels of the two box bodies respectively; and (3) photographing the two unit boxes by using a camera to obtain images of which the two unit boxes simultaneously display red, green and blue. As shown in fig. 6, 7, 8.
Step five: and (5) extracting and processing chrominance data. And respectively extracting an X stimulus value matrix and a Z stimulus value matrix of each single primary color corresponding to the box body to be corrected and the reference box body in the images of the step four. The reference box body brightness matrix Y obtained in the third steptargetForming a tristimulus value matrix of the reference box body by the X stimulus value matrix and the Z stimulus value matrix of each single primary color corresponding to the reference box body obtained in the step; luminance matrix Y of box to be correctedproAnd the X stimulus value matrix and the Z stimulus value matrix of each single base color corresponding to the box body to be corrected obtained in the step form a tristimulus value matrix of the box body to be corrected. Due to the box body to be corrected and the ginsengThe test box bodies are all unit box bodies subjected to preliminary brightness correction, and the tristimulus value matrixes at any positions of the full screen of the unit box bodies are almost the same. Therefore, one unit box body is represented by a tristimulus value matrix, and the integral value in the set area in each unit box body can be extracted to represent the color information of the unit box body. RXa、RYa、RZaIndicating the tristimulus value, GX, of the reference box when it is reda、GYa、GZaIndicating the tristimulus value, BX, of the reference box when it is greena、BYa、BZaIndicating the tristimulus value of the reference box when it is blue; RXb、RYb、RZbIndicating the tristimulus value, GX, of the box to be corrected when it shows redb、GYb、GZbIndicating the tristimulus value, BX, of the box to be corrected when it is greenb、BYb、BZbRepresenting the tristimulus value of the box to be corrected when the box is blue. Let XYZtargetTristimulus value matrix, XYZ, for reference boxproIs the tristimulus value matrix of the box body to be corrected.
Figure RE-RE-RE-RE-GDA0002923047820000071
Figure RE-RE-RE-RE-GDA0002923047820000072
Step six: and (5) color gamut space conversion. Calculating a color gamut conversion matrix [ coeff ] of each box body to be corrected according to a formula (2)]2
[coeff]2*[XYZpro]＝[XYZtarget]
[coeff]2＝[XYZtarget]*[XYZpro]-1 (2)
Step seven: and uploading the conversion matrix. Uploading the color gamut conversion matrix of the box body to be corrected, which is calculated in the step six, to a driving circuit of the box body to be corrected, and multiplying the color gamut conversion matrix of the box body to be corrected by a brightness degree preliminary correction coefficient matrix of the box body to be corrected to finish the brightness uniformity correction of the box body to be corrected.
When the brightness value is collected, the reference box body displays green each time because the red brightness and the temperature have direct relation, and the red brightness of the reference box is easy to be unstable due to temperature rise. The green color is most stable and the attenuation is minimal. The invention adopts green to transmit the brightness, and can keep the consistency of the brightness. Whereas the early attenuation of blue is more pronounced. The blue light can also be used as a reference box (reference light source) after entering the stable period.

Claims (5)

1. A single-box correction optical parameter consistency correction method for an LED display screen is characterized by comprising the following steps:
performing preliminary brightness correction on each unit box body for the spliced LED display screen to ensure that the brightness inside each unit box body is uniform; taking the unit box body subjected to the preliminary brightness correction as a box body to be corrected; at the moment, the correction coefficient of each LED pixel in the unit box body is used as a brightness preliminary correction coefficient; when the reference box body displays a single primary color and the box body to be corrected respectively displays red, green and blue colors, a camera is used for collecting images of the box body to be corrected and the reference box body; respectively extracting the brightness values of the box body to be corrected and the reference box body in the three images to obtain a reference box body brightness matrix YtargetAnd the brightness matrix Y of the box body to be correctedpro；
Calculating a brightness correction matrix [ coeff ] of the box body to be corrected according to a formula (1)]1；
[coeff]1＝[Ytarget]×[Ypro]-1 (1)
Uploading the brightness correction matrix to a driving circuit of the box body to be corrected, and multiplying the brightness correction matrix by a brightness preliminary correction coefficient of each LED pixel in the box body to be corrected to finish the brightness uniformity correction of the box body to be corrected;
and repeating the process to finish the brightness uniformity correction of all the unit box bodies for the spliced LED display screen.
2. A single-box correction optical parameter consistency correction method for an LED display screen is characterized by comprising the following steps:
to spliced LED displayThe screen is preliminarily corrected by using the brightness of each unit box body, so that the brightness of the interior of each unit box body is uniform; taking the unit box body subjected to the preliminary brightness and chroma correction as a box body to be corrected; at the moment, the brightness and chrominance correction coefficient of each LED pixel in the unit box body is used as a brightness and chrominance preliminary correction coefficient; when the reference box body displays a single primary color and the box body to be corrected respectively displays red, green and blue colors, a camera is used for collecting images of the box body to be corrected and the reference box body; respectively extracting the brightness values of the box body to be corrected and the reference box body in the three images to obtain a reference box body brightness matrix YtargetAnd the brightness matrix Y of the box body to be correctedpro(ii) a When all the LED pixels of the two unit boxes simultaneously display red, green and blue respectively, the two unit boxes are photographed by a camera at the same time to obtain images of the two unit boxes simultaneously displaying red, green and blue;
respectively extracting X stimulus value matrix and Z stimulus value matrix of each single primary color corresponding to the box body to be corrected and the reference box body in the image, and using the reference box body Y to obtain the X stimulus value matrix and the Z stimulus value matrixtargetThe stimulus value matrix and the X stimulus value matrix and the Z stimulus value matrix of each single primary color corresponding to the reference box form a tristimulus value matrix of the reference box; box body Y to be correctedproThe stimulus value matrix and the X stimulus value matrix and the Z stimulus value matrix of each single base color corresponding to the box body to be corrected form a tri-stimulus value matrix of the box body to be corrected; let XYZtargetTristimulus value matrix, XYZ, for reference boxproThe tristimulus value matrix of the box body to be corrected is obtained;
Figure FDA0002782164390000021
Figure FDA0002782164390000022
wherein RXa、RYa、RZaIndicating the tristimulus value, GX, of the reference box when it is reda、GYa、GZaIndicating the tristimulus value, BX, of the reference box when it is greena、BYa、BZaIndicating the tristimulus value of the reference box when it is blue; RXb、RYb、RZbIndicating the tristimulus value, GX, of the box to be corrected when it shows redb、GYb、GZbIndicating the tristimulus value, BX, of the box to be corrected when it is greenb、BYb、BZbRepresenting the tristimulus value of the box body to be corrected when the box body to be corrected displays blue;
calculating a color gamut conversion matrix [ coeff ] of each box body to be corrected according to a formula (2)]2；
[coeff]2＝[XYZtarget]*[XYZpro]-1 (2)
And uploading the color gamut conversion matrix of the box body to be corrected to a driving circuit of the box body to be corrected, and multiplying the color gamut conversion matrix by the initial brightness correction coefficient matrix of the box body to be corrected to finish the brightness uniformity correction of the box body to be corrected.
3. The LED display screen single-box correction optical parameter uniformization correction method according to claim 1 or 2, characterized in that: and extracting an integral value of the set area in the reference box to represent the brightness value of the reference box.
4. The LED display screen single-box correction optical parameter uniformization correction method according to claim 1 or 2, characterized in that: and extracting an integral value of the set area in the box body to be corrected to represent the chromaticity information of the box body to be corrected.
5. The LED display screen single-box correction optical parameter uniformization correction method according to claim 1 or 2, characterized in that: the single primary color displayed by the reference box is green.
CN202011285234.7A 2020-11-17 2020-11-17 LED display screen single-box correction optical parameter consistency correction method Pending CN112542132A (en)

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CN113257174A (en) * 2021-04-26 2021-08-13 长春希达电子技术有限公司 Method for determining chromaticity correction target color gamut of LED display screen
CN113257183A (en) * 2021-06-29 2021-08-13 卡莱特云科技股份有限公司 Complementary color correction method and device and computer equipment
CN113257144A (en) * 2021-05-13 2021-08-13 长春希达电子技术有限公司 Method for improving splicing brightness consistency among box bodies of LED display screen after single-box correction
CN113889028A (en) * 2021-09-23 2022-01-04 惠州市艾比森光电有限公司 Correction method and device for display screen box body
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
WO2024082339A1 (en) * 2022-10-19 2024-04-25 深圳市奥拓电子股份有限公司 On-site chrominance correction method, apparatus and system for led display screen module

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