CN112614458A - Display module correction method, device and system and correction system - Google Patents

Display module correction method, device and system and correction system Download PDF

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Publication number
CN112614458A
CN112614458A CN202010468347.4A CN202010468347A CN112614458A CN 112614458 A CN112614458 A CN 112614458A CN 202010468347 A CN202010468347 A CN 202010468347A CN 112614458 A CN112614458 A CN 112614458A
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correction
display module
different
brightness
correction data
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殷雷
韦桂锋
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Xian Novastar Electronic Technology Co Ltd
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Xian Novastar Electronic 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

Abstract

The embodiment of the invention relates to a display module correction method, a display module correction device, a display module correction system and a display module correction system. The correction method includes, for example: controlling a plurality of pixel points of a display module to display a plurality of correction image groups corresponding to a plurality of different colors under a plurality of different gray scales; controlling a plurality of image acquisition devices to acquire and display the plurality of correction image groups so as to obtain a plurality of brightness and chrominance data groups respectively corresponding to the plurality of correction image groups; generating a plurality of correction data of each pixel point under a plurality of different gray scales based on the plurality of brightness and chrominance data sets and a plurality of set correction target values so as to obtain a correction data set of each pixel point in the plurality of pixel points; and outputting the correction data set of each of the plurality of pixel points. The embodiment of the invention can obtain multi-gray-scale correction data, thereby realizing the technical effect of better display uniformity under different gray scales.

Description

Display module correction method, device and system and correction system
Technical Field
The present invention relates to the field of display correction technologies, and in particular, to a display module correction method, a display module correction device, a display module correction system, and a correction system.
Background
With the development of the LED industry, the display quality requirements of users for low gray levels of LED display screens, even the whole gray level (or called full gray level), are higher and higher, for example, the color temperature of 0-255 gray level display is consistent, the gray level gradually changes smoothly, and the high gray level and low gray level display is uniform. The problem of color temperature and gray scale gradual change needs more gray scales to complete the processing, and the LED display screen needs to be corrected aiming at the display uniformity. The existing LED display screen correction method includes the steps of collecting brightness and chrominance data of the red, green and blue highest gray scales of an LED display screen, automatically or manually setting a brightness and chrominance correction target value according to the collected brightness and chrominance data, calculating a correction coefficient of each LED lamp point of each LED pixel point according to the collected brightness and chrominance data and the brightness and chrominance correction target value, and uploading the calculated correction coefficient to the LED display screen through a signal source input interface (such as a DVI interface) or a communication interface (such as a serial port/USB port/network port and the like). However, the existing LED display screen calibration is difficult to solve the problem of inconsistent display uniformity of the LED display screen in low gray, even the whole gray stage.
Disclosure of Invention
Therefore, to overcome the defects and shortcomings of the prior art, embodiments of the present invention provide a display module calibration method, a display module calibration apparatus, a display module calibration system, and a calibration system.
On one hand, a method for correcting a display module provided by an embodiment of the present invention includes: i) controlling a plurality of pixel points of a display module to display a plurality of correction image groups corresponding to a plurality of different colors, wherein each correction image group comprises a plurality of correction images respectively corresponding to a plurality of different gray scales of the same color; ii) controlling a plurality of image acquisition devices to acquire the plurality of correction image groups displayed by the plurality of pixel points of the display module so as to obtain a plurality of brightness and chrominance data groups respectively corresponding to the plurality of correction image groups, wherein each brightness and chrominance data group comprises a plurality of brightness and chrominance data respectively corresponding to a plurality of different gray scales; iii) generating a plurality of correction data of each pixel point under a plurality of different gray scales based on the plurality of brightness and chrominance data sets and a plurality of set correction target values to obtain a correction data set of each pixel point in the plurality of pixel points; and iv) outputting said correction data set for each of said plurality of pixels.
The display module correction method of this embodiment controls the display module to display correction images of a plurality of different colors under a plurality of different gray scales, and controls the plurality of image acquisition devices to acquire the correction images displayed by the display module, so as to obtain a plurality of luminance and chrominance data sets, and then based on the plurality of luminance and chrominance data sets obtained by acquisition, a plurality of correction data of each pixel point corresponding to the plurality of different colors under the plurality of different gray scales can be obtained to form a correction data set, and the correction data set is output, so that the display module can be used for performing multi-gray scale color correction, such as multi-gray scale luminance correction or multi-gray scale luminance and chrominance correction, on the corresponding pixel point in a subsequent image display process, thereby achieving a technical effect of better display uniformity under different gray scales.
In one embodiment of the invention, the display module correction method further comprises controlling to convey the display module to a plurality of different stations in sequence; the control display module's a plurality of pixel point display corresponds a plurality of different colours a plurality of correction with the image group, include: at each station, controlling the plurality of pixel points of the display module to sequentially display a plurality of correction images corresponding to the same color under a plurality of different gray scales, and enabling the colors corresponding to the correction images displayed by the plurality of pixel points of the display module at the plurality of different stations to be different from each other; and the controlling the plurality of image acquisition devices to acquire the plurality of correction image groups displayed by the plurality of pixel points of the display module comprises: and at each station, controlling one of the image acquisition devices to acquire a plurality of correction images, which are displayed by the pixel points of the display module in sequence and correspond to the same color under different gray scales, wherein the image acquisition devices are respectively arranged corresponding to the different stations.
In one embodiment of the invention, the display module correction method further comprises controlling to convey the display module to a plurality of different stations in sequence; the control display module's a plurality of pixel point display corresponds a plurality of different colours a plurality of correction with the image group, include: at each station, controlling the plurality of pixel points of the display module to sequentially display a plurality of correction images corresponding to the plurality of different colors under the same gray scale, wherein the gray scales corresponding to the correction images displayed by the plurality of pixel points of the display module at the plurality of different stations are different from each other; and the controlling the plurality of image acquisition devices to acquire the plurality of correction image groups displayed by the plurality of pixel points of the display module comprises: and at each station, controlling one of the image acquisition devices to acquire a plurality of images for correction, which are displayed by the pixel points of the display module in sequence and correspond to the different colors under the same gray scale, wherein the image acquisition devices are respectively arranged at the different stations.
In an embodiment of the present invention, the generating, based on the plurality of luminance and chrominance data sets and the set plurality of correction target values, a plurality of correction data of each pixel point under a plurality of different gray scales to obtain a correction data set of each pixel point of the plurality of pixel points includes: a) selecting a plurality of first brightness and chrominance data corresponding to a plurality of images for correction of different colors under the same first target gray scale from the plurality of brightness and chrominance data groups; b) setting a first brightness correction target value according to the plurality of first brightness data; and c) taking the multiple pieces of first brightness and chrominance data as initial brightness and chrominance data and calculating by combining the first brightness and chrominance correction target value to obtain multiple first correction data of the multiple different colors under the first target gray scale corresponding to each pixel point in the multiple pixel points.
In an embodiment of the present invention, the generating, based on the plurality of luminance and chrominance data sets and the set plurality of correction target values, a plurality of correction data of each pixel point under a plurality of different gray scales to obtain a correction data set of each pixel point of the plurality of pixel points further includes: d) selecting brightness and chrominance data corresponding to the images for correction under the first target gray scale of the first color of the plurality of different colors from the plurality of brightness and chrominance data corresponding to the images for correction under the second target gray scale of the rest colors except the first color of the plurality of different colors from the plurality of; e) setting a second brightness correction target value according to the plurality of second brightness data; and f) taking the plurality of second brightness and chrominance data as initial brightness and chrominance data and calculating by combining the second brightness and chrominance correction target value to obtain second correction data of each pixel point in the plurality of pixel points corresponding to the first color under the first target gray scale.
In an embodiment of the present invention, said outputting the correction data set of each of the plurality of pixel points includes: sending the correction data set of each of the plurality of pixel points to the display module to be stored in the display module; and/or storing the correction data set of each of the plurality of pixel points to a designated storage device.
In one embodiment of the invention, the plurality of different colors are a plurality of different primary colors; the correction data set comprises a plurality of correction data subsets respectively corresponding to the different primary colors, each correction data subset comprises a plurality of correction data of the same primary color under different gray scales, and each correction data comprises a plurality of correction coefficients.
In one embodiment of the invention, the plurality of different colors are a plurality of different primary colors; the correction data set comprises a plurality of correction data subsets respectively corresponding to the different primary colors, each correction data subset comprises a plurality of groups of correction data of the same primary color under different gray scales, each group of correction data comprises a plurality of correction data corresponding to different saturation degrees, and each correction data comprises one or more correction coefficients.
On the other hand, a display module calibration apparatus provided in an embodiment of the present invention includes: the device comprises a display control module, an acquisition control module, a correction data generation module and an output module. The display control module is used for controlling a plurality of pixel points of the display module to display a plurality of correction image groups corresponding to a plurality of different colors, wherein each correction image group comprises a plurality of correction images respectively corresponding to a plurality of different gray scales of the same color; the acquisition control module is used for controlling a plurality of image acquisition devices to acquire a plurality of correction image groups displayed by a plurality of pixel points of the display module so as to obtain a plurality of brightness and chrominance data groups respectively corresponding to the plurality of correction image groups, wherein each brightness and chrominance data group comprises a plurality of brightness and chrominance data respectively corresponding to a plurality of different gray scales; the correction data generation module is used for generating a plurality of correction data of each pixel point under a plurality of different gray scales based on the plurality of brightness and chrominance data sets and a plurality of set correction target values so as to obtain a correction data set of each pixel point in the plurality of pixel points; and the output module is used for outputting the correction data set of each pixel point in the plurality of pixel points.
In another aspect, a display module calibration system provided in an embodiment of the present invention includes: a processor and a memory coupled to the processor; wherein the memory stores instructions for execution by the processor, and the instructions cause the processor to perform operations to perform the display module calibration method of any of the preceding embodiments.
In another aspect, an embodiment of the present invention provides a calibration system, including: the darkroom comprises a plurality of image acquisition devices and a plurality of stations respectively corresponding to the image acquisition devices; the conveying equipment is used for sequentially conveying the display modules to the plurality of stations of the plurality of darkrooms; and the computer system is electrically connected with the plurality of image acquisition devices, the plurality of stations and the conveying device and is used for executing the display module correction method in any one of the embodiments.
The correction system of the embodiment acquires the correction images of a plurality of different colors displayed by a plurality of pixel points of the display module under a plurality of different gray scales by using a plurality of image acquisition devices in a plurality of darkrooms, so as to obtain the brightness and chroma data, and realizes the pipelining operation of image acquisition by combining the transmission devices, and then a plurality of correction data of each pixel point corresponding to a plurality of different colors under a plurality of different gray scales can be obtained according to the acquired brightness and chroma data, namely the multi-gray-scale correction data is obtained, so that the technical effect of better display uniformity under different gray scales can be realized.
As can be seen from the above, the above technical features of the present invention may have one or more of the following advantages: the display module correction method, the device and the system can obtain a plurality of brightness and chrominance data sets by controlling the display module to display a plurality of correction images of different colors under a plurality of different gray scales and controlling a plurality of image acquisition devices to acquire the correction images displayed by the display module, then obtain a plurality of correction data of each pixel point under a plurality of different gray scales corresponding to the plurality of different colors based on the plurality of collected brightness and chrominance data sets to form a correction data set, and output the correction data set, namely the correction data set can be used for the display module to perform multi-gray scale color correction, such as multi-gray scale brightness correction or multi-gray scale brightness correction, on the corresponding pixel point in the subsequent image display process; furthermore, the correction system acquires correction images of a plurality of different colors displayed by a plurality of pixel points of the display module under a plurality of different gray scales by using a plurality of image acquisition devices in a plurality of darkrooms to obtain brightness and chrominance data, and realizes the pipelining operation of image acquisition by combining a transmission device, and then a plurality of correction data of each pixel point corresponding to a plurality of different colors under a plurality of different gray scales can be obtained according to the acquired brightness and chrominance data, namely the multi-gray-scale correction data is obtained. In short, the embodiment of the invention can realize the technical effect of better display uniformity under different gray scales and improve the image display quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a display module calibration method according to a first embodiment of the invention.
FIG. 2 is a schematic diagram of a calibration system suitable for the calibration method of the display module shown in FIG. 1.
FIG. 3 is a schematic diagram of another calibration system suitable for the calibration method of the display module shown in FIG. 1.
Fig. 4 is a block diagram of a display module calibration apparatus according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a display module calibration system according to a third embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
As shown in fig. 1, a display module calibration method according to a first embodiment of the present invention includes:
s11: controlling a plurality of pixel points of a display module to display a plurality of correction image groups corresponding to a plurality of different colors, wherein each correction image group comprises a plurality of correction images respectively corresponding to a plurality of different gray scales of the same color;
s13: controlling a plurality of image acquisition devices to acquire the plurality of correction image groups displayed by the plurality of pixel points of the display module so as to obtain a plurality of brightness and chrominance data groups respectively corresponding to the plurality of correction image groups, wherein each brightness and chrominance data group comprises a plurality of brightness and chrominance data respectively corresponding to a plurality of different gray scales;
s15: generating a plurality of correction data of each pixel point under a plurality of different gray scales based on the plurality of brightness and chrominance data sets and a plurality of set correction target values so as to obtain a correction data set of each pixel point in the plurality of pixel points;
s17: and outputting the correction data set of each pixel point in the plurality of pixel points.
The display module correction method of the embodiment of the invention can obtain a plurality of brightness and chrominance data sets by controlling the display module to display a plurality of correction images of different colors under a plurality of different gray scales and controlling a plurality of image acquisition devices to acquire the correction images displayed by the display module, then can obtain a plurality of correction data of each pixel point under a plurality of different gray scales corresponding to the plurality of different colors based on the plurality of collected brightness and chrominance data sets to form a correction data set, and can be used for the display module to perform multi-gray scale color correction, such as multi-gray scale brightness correction or multi-gray scale brightness correction, on the corresponding pixel point in the subsequent image display process, thereby realizing the technical effect of better display uniformity under different gray scales.
Optionally, as an embodiment of the present invention, the display module correction method further includes, for example: controlling and conveying the display module to sequentially reach a plurality of different stations; accordingly, the step S11 includes, for example: at each station, controlling the plurality of pixel points of the display module to sequentially display a plurality of correction images corresponding to the same color under a plurality of different gray scales, and enabling the colors corresponding to the correction images displayed by the plurality of pixel points of the display module at the plurality of different stations to be different from each other; and the step S13 includes, for example: and at each station, controlling one of the image acquisition devices to acquire a plurality of correction images, which are displayed by the pixel points of the display module in sequence and correspond to the same color under different gray scales, wherein the image acquisition devices are respectively arranged corresponding to the different stations. In the embodiment, the streamline operation is adopted, and each image acquisition device only acquires the correction images of the same color under a plurality of different gray scales, so that the image acquisition efficiency can be improved, and the efficiency of the whole correction process can be improved.
Optionally, as an embodiment of the present invention, the display module correction method further includes, for example: controlling and conveying the display module to sequentially reach a plurality of different stations; accordingly, the step S11 includes, for example: at each station, controlling the plurality of pixel points of the display module to sequentially display a plurality of correction images corresponding to the plurality of different colors under the same gray scale, wherein the gray scales corresponding to the correction images displayed by the plurality of pixel points of the display module at the plurality of different stations are different from each other; and the step S13 includes, for example: and at each station, controlling one of the image acquisition devices to acquire a plurality of images for correction, which are displayed by the pixel points of the display module in sequence and correspond to the different colors under the same gray scale, wherein the image acquisition devices are respectively arranged at the different stations. In the embodiment, the streamline operation is adopted, and each image acquisition device only acquires a plurality of correction images with different colors under the same gray scale, so that the image acquisition efficiency can be improved, and the efficiency of the whole correction process can be improved.
Optionally, as an embodiment of the present invention, the step S15 includes, for example: selecting a plurality of first brightness and chrominance data corresponding to a plurality of images for correction of different colors under the same first target gray scale from the plurality of brightness and chrominance data groups; setting a first brightness correction target value according to the plurality of first brightness data; and taking the multiple pieces of first brightness and chrominance data as initial brightness and chrominance data and calculating by combining the first brightness and chrominance correction target value to obtain multiple first correction data of the multiple different colors under the first target gray scale corresponding to each pixel point in the multiple pixel points. In this embodiment, the correction data of a plurality of different colors corresponding to each pixel point when the saturation is 0 at any gray level can be calculated.
Optionally, as an embodiment of the present invention, the step S15 further includes, for example: selecting brightness and chrominance data corresponding to the images for correction under the first target gray scale of the first color of the plurality of different colors from the plurality of brightness and chrominance data corresponding to the images for correction under the second target gray scale of the rest colors except the first color of the plurality of different colors from the plurality of; setting a second brightness correction target value according to the plurality of second brightness data; and taking the plurality of second brightness and chrominance data as initial brightness and chrominance data and calculating to obtain second correction data of each pixel point in the plurality of pixel points corresponding to the first color under the first target gray scale by combining the second brightness and chrominance correction target value. The embodiment can calculate the correction data of each pixel point corresponding to any color when the saturation is not 0 under any gray scale.
Optionally, as an embodiment of the present invention, the step S17 includes, for example: sending the correction data set of each of the plurality of pixel points to the display module to be stored in the display module; and/or storing the correction data set of each of the plurality of pixel points to a designated storage device. The embodiment can directly send the correction data set of each pixel point to the display module to be stored for subsequent pixel point-by-pixel point color correction, and also can firstly store the correction data set of each pixel point to a designated storage device for backup or for subsequent transfer to the display module or a control system connected with the display module, or both.
Optionally, as an embodiment of the present invention, the plurality of different colors are a plurality of different primary colors; the correction data set comprises a plurality of correction data subsets respectively corresponding to the different primary colors, each correction data subset comprises a plurality of correction data of the same primary color under different gray scales, and each correction data comprises a plurality of correction coefficients. In this embodiment, correction data corresponding to a plurality of different primary colors (e.g., red, green, and blue) at a plurality of different gray scales can be obtained for each pixel, for example, multi-gray scale correction data of an RGB full-color LED display module can be obtained.
Optionally, as an embodiment of the present invention, the plurality of different colors are a plurality of different primary colors; the correction data set comprises a plurality of correction data subsets respectively corresponding to the different primary colors, each correction data subset comprises a plurality of groups of correction data of the same primary color under different gray scales, each group of correction data comprises a plurality of correction data corresponding to different saturation degrees, and each correction data comprises one or more correction coefficients. According to the embodiment, the correction data sets of a plurality of different primary colors (such as red, green and blue) corresponding to each pixel point under a plurality of different gray scales can be obtained, and the correction data sets are further divided into a plurality of correction data according to different saturation degrees, so that the color correction of the pixel points can be performed on the display module based on the difference of the color gray scales and the saturation degrees, and the image correction effect is further improved. Moreover, for the correction data subset of any primary color, different correction data are adopted for different saturation degrees under the same gray scale, so that the correction data of the primary color adopts a correction coefficient corresponding to any saturation degree to realize the bright-chrominance correction effect of the pixel point, and the storage space can be reduced; of course, in this embodiment, the luminance and chrominance correction effect may be achieved by using a plurality of, for example, three correction coefficients, such as one luminance correction coefficient and two chrominance compensation coefficients, corresponding to any saturation of the correction data of any primary color.
In order to more clearly understand the display module calibration method of the present embodiment, an LED display box is taken as an embodiment of the display module and is described in detail with reference to the calibration system shown in fig. 2. The LED display box herein includes, for example, one or more LED lamp panels including a plurality of LED pixel points, each including, for example, a red LED light point, a green LED light point, and a blue LED light point, and a display control card (such as an existing receiving card, scanning card, or module controller) electrically connected to the LED lamp panels.
Specifically, as shown in fig. 2, the correction system 20 of the present embodiment includes: a plurality of dark rooms 21a, 21b, 21c and 21d, a transfer device 23 and a computer system 25. The darkroom 21a comprises an image acquisition device 211a and a station 213a corresponding to the image acquisition device 211a and is used for providing a darkroom environment, the darkroom 21b comprises an image acquisition device 211b and a station 213b corresponding to the image acquisition device 211b and is used for providing a darkroom environment, the darkroom 21c comprises an image acquisition device 211c and a station 213c corresponding to the image acquisition device 211c and is used for providing a darkroom environment, and the darkroom 21d comprises an image acquisition device 211d and a station 213d corresponding to the image acquisition device 211d and is used for providing a darkroom environment. The computer system 25 includes, for example, one or more computers each equipped with calibration software and display control software, and is electrically connected to each of the image capturing devices 211a to 211d, each of the workstations 213a to 213d, and the transfer device 23. The conveying device 23 of the present embodiment is used for receiving the control of the computer system 25 to convey the display module 300 to the respective stations 213a to 213d in sequence and includes, for example, a conveying track; the stations 213a to 213d are arranged at intervals along the conveying track, and are used for acquiring the screen image from the computer system 25 and sending the screen image to the display module 300 so as to display a plurality of images for correction of a plurality of different colors under the same gray scale. For example, assuming that the display module 300 has inconsistent uniformity in the four different gray scale sections of gray scale 0-10, gray scale 10-30, gray scale 30-100 and gray scale 100-255, the display module 300 may be controlled to sequentially display the red (R) image, the green (G) image and the blue (B) image at gray scale 8 at the workstation 213a, sequentially display the red image, the green image and the blue image at gray scale 16 at the workstation 213B, sequentially display the red image, the green image and the blue image at gray scale 64 at the workstation 213c, and sequentially display the red image, the green image and the blue image at gray scale 255 at the workstation 213d (corresponding to step S11). It should be noted that the gray levels displayed at each of the workstations 213 a-213 d can be any gray level in the corresponding gray level interval.
As mentioned above, the computer system 25, for example, controls the image collecting device 211a to collect the red image, the green image and the blue image of the gray scale 8 sequentially displayed by the display module 300 at the station 213a and perform image processing on each collected image, such as current mature region positioning and point positioning, to obtain three parts of luminance and chrominance data corresponding to the gray scale 8, controls the image collecting device 211b to collect the red image, the green image and the blue image of the gray scale 16 sequentially displayed by the display module 300 at the station 213a and perform image processing on each collected image to obtain three parts of luminance and chrominance data corresponding to the gray scale 16, controls the image collecting device 211c to collect the red image, the green image and the blue image of the gray scale 64 sequentially displayed by the display module 300 at the station 213c and perform image processing on each collected image to obtain three parts of luminance and chrominance data corresponding to the gray scale 64, and controlling the image capturing device 211d to capture the red image, the green image and the blue image of the display module 300 at the gray scale 255 sequentially displayed at the workstation 213d and perform image processing on each captured image to obtain three bright-color data corresponding to the gray scale 255 (corresponding to step S13).
Then, the computer system 25 sets a luminance and chrominance correction target value according to the obtained luminance and chrominance data, and calculates correction data of each LED pixel point under a plurality of different gray scales by using the obtained luminance and chrominance data as initial luminance and chrominance data in combination with the set luminance and chrominance correction target value (corresponding to step S15).
For example, when the correction data of each LED pixel point with the saturation of 0 at the gray scale 16 is to be calculated, since different saturations require the original luminance and chrominance data to be obtained by mixing under different RGB ratios, three luminance and chrominance data corresponding to the red image at the gray scale 16 (corresponding to the first target gray scale), the green image at the gray scale 16 (corresponding to the first target gray scale), and the blue image at the gray scale 16 (corresponding to the first target gray scale) can be selected, and the luminance and chrominance correction target value is set based on the three luminance and chrominance data. The luminance-chromaticity correction target value here includes a target luminance value and a target chromaticity value; the target brightness value and the target chromaticity value are set as the existing mature technology, for example, the target brightness value may be a brightness average value obtained by performing normal distribution analysis on the brightness values of a plurality of LED light points of the same color to remove LED light points with too low brightness values and then averaging the brightness values of the remaining LED light points, or the brightness average value is appropriately adjusted by a certain percentage to be used as the target brightness value; the target chromaticity value may be obtained by calculating CIE chromaticity coordinates of each LED pixel point including the red, green, and blue LED light points to obtain a corresponding color gamut, and obtaining a common color gamut of each LED pixel point and the CIE chromaticity coordinates corresponding to the common color gamut. After the brightness and chrominance correction target value is set, the three brightness and chrominance data are used as original brightness and chrominance data, and correction data of each LED pixel point under the gray scale 16 when the saturation is 0 can be obtained based on the existing mature brightness and chrominance correction coefficient calculation method, for example, the correction data of each LED pixel point under the gray scale 16 when the saturation is 0 comprises correction data which correspond to a red LED lamp point and comprise a 1 x 3 coefficient matrix, correction data which correspond to a green LED lamp point and comprise a 1 x 3 coefficient matrix and correction data which correspond to a blue LED lamp point and comprise a 1 x 3 coefficient matrix.
When the correction data of each LED pixel point at the gray scale 16 when the saturation is not 0 (for example, the saturation is 0.5) needs to be calculated, since different saturations need to be obtained by mixing the original luminance and chrominance data at different RGB ratios, three luminance and chrominance data obtained from the red image at the gray scale 16 (corresponding to the first target gray scale), the green image at the gray scale 8 (corresponding to the second target gray scale), and the blue image at the gray scale 8 (corresponding to the second target gray scale) can be selected, and the luminance and chrominance correction target value is set based on the three luminance and chrominance data. After the brightness and chroma correction target value is set, the three brightness and chroma data are used as original brightness and chroma data, and correction data which correspond to each red LED lamp point and comprise a 1 x 3 coefficient matrix when the saturation is 0.5 under the gray scale 16 can be obtained based on the existing mature brightness and chroma correction coefficient calculation method. Similarly, the correction data containing the 1 × 3 coefficient matrix corresponding to each green LED light point when the saturation is 0.5 at the gray scale 16 can be obtained from the red image at the gray scale 8, the green image at the gray scale 16 and the blue image at the gray scale 8, and the correction data containing the 1 × 3 coefficient matrix corresponding to each blue LED light point when the saturation is 0.5 at the gray scale 16 can be obtained from the red image at the gray scale 8, the green image at the gray scale 8 and the blue image at the gray scale 16.
From the above, the correction data corresponding to different saturation levels under the same gray scale can be calculated and obtained through different RGB ratios. In addition, it is worth mentioning that, in the case that only the rgb images of the gray scale 8, the gray scale 16, the gray scale 64, and the gray scale 255 are acquired by using the image acquisition devices 211a to 211d, the correction data of each LED pixel point under other non-acquired gray scales still can be calculated, for example, the correction data of each LED pixel point under the gray scale 12, and the original luminance and chrominance data required for calculating the correction data under the gray scale 12 can be obtained by performing interpolation processing on the luminance and chrominance data of the rgb images of two adjacent acquired gray scales (for example, the gray scale 8 and the gray scale 16). In addition, in some embodiments, only the correction data of each LED pixel point with the saturation of 0 at a plurality of different gray scales may be calculated, and the correction data of each LED pixel point with the saturation of non-0 at a plurality of different gray scales may not be calculated, so that the technical effect of better display uniformity at different gray scales may be achieved to a certain extent.
After the correction data of each LED pixel point of the display module 300 at a plurality of different gray scales (even a plurality of different saturations at a plurality of different gray scales) is obtained to obtain the correction data set of each LED pixel point, the correction data set of each LED pixel point is output (corresponding to step S17). Specifically, the correction data set of each LED pixel may be directly sent to the display module 300, such as a display control card of an LED display box, for storage, so as to perform subsequent pixel-by-pixel color correction, or the correction data set of each LED pixel may be first stored in a designated storage device (which may be a memory of the computer system 25 itself, or another storage device independent of the computer system 25) so as to be backed up or be transferred to the display module 300 subsequently; when the display module 300 is, for example, an LED lamp panel, the correction data set of each LED pixel point may be directly sent to a nonvolatile memory, such as a flash memory, of the LED lamp panel for storage, or stored in a designated storage device first, and then transferred to a display control card connected to the LED lamp panel. In addition, it can be understood that the display module 300 is not limited to the LED display box and the LED lamp panel, and may also be an LED display screen including a plurality of display control cards and electrically connected to the plurality of display control cards.
As mentioned above, as for the correction data corresponding to a plurality of different gray scales in the correction data set of each LED pixel of the display module 300, the saturation may not be distinguished, and different saturations may also be distinguished.
(I) Under the condition of not distinguishing saturation, taking a correction data set of a single LED pixel point under four different gray levels as an example, the content form is shown in table 1.
Table 1 content form of correction data set (saturation indistinguishable)
Red correction data subset Green correction data subset Blue correction data subset
L8 L8 L8
L16 L16 L16
L64 L64 L64
L255 L255 L255
L8, L16, L64 and L255 in table 1 indicate correction data for red, green and blue LED light points at gray scale 8, gray scale 16, gray scale 64 and gray scale 255, respectively.
(II) in the case of saturation differentiation, taking the correction data sets of N saturations of a single LED pixel under four different gray levels as an example, the content forms are shown in Table 2.
Table 2 content form of correction data set (discrimination saturation)
Figure BDA0002513411210000151
In table 2, L8, L16, L64, and L255 respectively indicate correction data sets for the red, green, and blue LED light points at gray scale 8, gray scale 16, gray scale 64, and gray scale 255, and Sat1, Sat2, …, and SatN respectively indicate correction data corresponding to N different saturations in a single correction data set.
In summary, the display module calibration method of this embodiment may obtain a plurality of luminance and chrominance data sets by controlling the display module to display a plurality of calibration images of different colors under a plurality of different gray scales, and controlling the plurality of image acquisition devices to acquire the calibration images displayed by the display module, and then obtain a plurality of calibration data of each pixel point corresponding to the plurality of different colors under the plurality of different gray scales based on the plurality of luminance and chrominance data sets obtained by acquisition to form a calibration data set, and output the calibration data set, which may be used by the display module to perform multi-gray scale color calibration, such as multi-gray scale luminance calibration or multi-gray scale luminance calibration, on the corresponding pixel point in a subsequent image display process, thereby achieving a technical effect of better display uniformity under different gray scales.
Furthermore, it should be noted that fig. 2 only illustrates four darkrooms 21a to 21d, and accordingly four image capturing devices 211a to 211d are used to capture a plurality of different color images at four different gray scales respectively; however, the embodiment of the present invention is not limited thereto, and more darkrooms may be designed, so that more gray-scale correction data of each pixel point of the display module 300 may be finally obtained; of course, the embodiment of the invention does not exclude the case of arranging two or three dark rooms, and the specific number of the dark rooms can be flexibly designed according to actual requirements.
In addition, referring to fig. 3, in other embodiments, the display module calibration method according to the first embodiment of the present invention may also adopt the calibration system 30 shown in fig. 3. Specifically, the correction system 30 includes: a plurality of dark rooms 31a, 31b and 31c, a transfer device 33 and a computer system 35. The darkroom 31a comprises an image acquisition device 311a and a station 313a corresponding to the image acquisition device 311a and is used for providing a darkroom environment, the darkroom 31b comprises an image acquisition device 311b and a station 313b corresponding to the image acquisition device 311b and is used for providing a darkroom environment, and the darkroom 31c comprises an image acquisition device 311c and a station 313c corresponding to the image acquisition device 311c and is used for providing a darkroom environment. The computer system 35 includes, for example, one or more computers each equipped with calibration software and display control software, and is electrically connected to each of the image capturing apparatuses 311a to 311c, each of the workstations 313a to 313c, and the transfer apparatus 33. The conveying device 33 of the present embodiment is used for receiving the control of the computer system 35 to convey the display module 300 to the stations 313a to 313c in sequence and includes, for example, a conveying track; the stations 313a to 313c are arranged at intervals along the conveying track, and each station is used for acquiring a screen image from the computer system 35 and sending the screen image to the display module 300 so as to display a plurality of correction images with the same color and different gray scales. For example, if the uniformity of the display module 300 is not consistent between the gray scales 0-10, 10-30, 30-100 and 100-255, the display module 300 can be controlled to sequentially display the red (R) image under the gray scale 8, 16, 64 and 255 at the workstation 313a, sequentially display the green (G) image under the gray scale 8, 16, 64 and 255 at the workstation 313B, and sequentially display the blue (B) image under the gray scale 8, 16, 64 and 255 at the workstation 313 c. It should be noted that the display module 300 can also display images with more gray scales at each station 313a to 313d, even 256 gray scale primary color images with 0 to 255 gray scales in total; or, in a single station, the display sequence of the images with the same color and different gray scales is not limited. For the control of the image capturing devices 311a to 311c by the computer system 35 and the calculation and output of the correction data sets of the pixels, reference may be made to the related description of the computer system 25, which is not repeated herein.
In other embodiments, the display module 300 may be transferred between the stations by manual transportation, that is, the transfer is not limited to the automatic transfer by the transfer device 23/33 in the previous embodiment. In addition, in other embodiments, the same image capturing device may be used to employ a plurality of primary color images of the display module 300 at a plurality of different gray levels, and two image capturing devices are taken as an example (but the embodiment of the present invention is not limited thereto), where one image capturing device may employ a plurality of gray levels in a certain gray level range (such as a low gray level), for example, a red image, a green image, and a blue image at gray levels 8 and 16, and another image capturing device employs a plurality of gray levels in another gray level range (such as a high gray level), for example, a red image, a green image, and a blue image at gray levels 255 and 64; in this way, the display module 300 needs to display a plurality of primary color images at each of a plurality of different gray scales at the same station, thereby saving the equipment cost while ensuring the correction effect to a certain extent. It should be noted that, dividing the full gray level segment into two gray levels, i.e., high gray level and low gray level, is merely an example, and may be divided into more gray levels (corresponding to more gray level ranges) according to actual needs.
[ second embodiment ]
Referring to fig. 4, a display module calibration apparatus 40 according to a second embodiment of the present invention includes: a display control module 41, an acquisition control module 43, a correction data generation module 45, and an output module 47.
The display control module 41 is, for example, configured to control a plurality of pixel points of the display module to display a plurality of correction image groups corresponding to a plurality of different colors, where each of the correction image groups includes a plurality of correction images corresponding to a plurality of different gray scales of the same color, respectively; the collecting control module 43 is, for example, configured to control a plurality of image collecting devices to collect the plurality of calibration image groups displayed by the plurality of pixel points of the display module, so as to obtain a plurality of luminance and chrominance data sets respectively corresponding to the plurality of calibration image groups, where each of the luminance and chrominance data sets includes a plurality of luminance and chrominance data respectively corresponding to a plurality of different gray scales; the correction data generating module 45 is, for example, configured to generate a plurality of correction data of each pixel point under a plurality of different gray scales based on the plurality of luminance and chrominance data sets and a plurality of set correction target values, so as to obtain a correction data set of each pixel point of the plurality of pixel points; and the output module 47 is, for example, configured to output the correction data set of each of the plurality of pixels.
For specific functional details of the display control module 41, the acquisition control module 43, the correction data generation module 45, and the output module 47, reference may be made to the detailed description in the foregoing first embodiment, and no further description is given here. It should be noted that the display control module 41, the acquisition control module 43, the correction data generating module 45 and the output module 47 may be software modules stored in the non-volatile memory and executed by the processor to perform the operations of steps S11, S13, S15 and S17 in the first embodiment.
Optionally, as an embodiment of the present invention, the display module correction apparatus further includes: and a conveying control module (not shown) for controlling the display module to be conveyed to a plurality of different stations in sequence. The display control module 41 is specifically configured to: at each station, controlling the plurality of pixel points of the display module to sequentially display a plurality of correction images corresponding to the same color under a plurality of different gray scales, and enabling the colors corresponding to the correction images displayed by the plurality of pixel points of the display module at the plurality of different stations to be different from each other; and the acquisition control module 43 is specifically configured to: and at each station, controlling one of the image acquisition devices to acquire a plurality of correction images, which are displayed by the pixel points of the display module in sequence and correspond to the same color under different gray scales, wherein the image acquisition devices are respectively arranged corresponding to the different stations. In the embodiment, the streamline operation is adopted, and each image acquisition device only acquires the correction images of the same color under a plurality of different gray scales, so that the image acquisition efficiency can be improved, and the efficiency of the whole correction process can be improved.
Optionally, as an embodiment of the present invention, the display module correction apparatus further includes: and a conveying control module (not shown) for controlling the display module to be conveyed to a plurality of different stations in sequence. The display control module 41 is specifically configured to: at each station, controlling the plurality of pixel points of the display module to sequentially display a plurality of correction images corresponding to the plurality of different colors under the same gray scale, wherein the gray scales corresponding to the correction images displayed by the plurality of pixel points of the display module at the plurality of different stations are different from each other; and the acquisition control module 43 is specifically configured to: and at each station, controlling one of the image acquisition devices to acquire a plurality of images for correction, which are displayed by the pixel points of the display module in sequence and correspond to the different colors under the same gray scale, wherein the image acquisition devices are respectively arranged at the different stations. In the embodiment, the streamline operation is adopted, and each image acquisition device only acquires a plurality of correction images with different colors under the same gray scale, so that the image acquisition efficiency can be improved, and the efficiency of the whole correction process can be improved.
Optionally, as an embodiment of the present invention, the same image capturing device may also adopt a plurality of primary color images of the display module under a plurality of different gray scales, and take two image capturing devices as an example (but the embodiment of the present invention is not limited thereto), where one image capturing device may adopt a plurality of gray scales in a certain gray scale range (for example, a low gray scale range), for example, a red image, a green image, and a blue image under gray scales 8 and 16, and another image capturing device adopts a plurality of gray scales in another gray scale range (for example, a high gray scale range), for example, a red image, a green image, and a blue image under gray scales 255 and 64; therefore, the display module needs to display a plurality of primary color images under each gray scale in a plurality of different gray scales on the same station, so that the correction effect can be ensured to a certain extent, and the equipment cost is saved. It should be noted that, dividing the full gray level segment into two gray levels, i.e., high gray level and low gray level, is merely an example, and may be divided into more gray levels (corresponding to more gray level ranges) according to actual needs.
Optionally, as an embodiment of the present invention, the correction data generating module 45 is specifically configured to: selecting a plurality of first brightness and chrominance data corresponding to a plurality of images for correction of different colors under the same first target gray scale from the plurality of brightness and chrominance data groups; setting a first brightness correction target value according to the plurality of first brightness data; and taking the multiple pieces of first brightness and chrominance data as initial brightness and chrominance data and calculating by combining the first brightness and chrominance correction target value to obtain multiple first correction data of the multiple different colors under the first target gray scale corresponding to each pixel point in the multiple pixel points. In this embodiment, the correction data of a plurality of different colors corresponding to each pixel point when the saturation is 0 at any gray level can be calculated.
Optionally, as an embodiment of the present invention, the correction data generating module 45 is further specifically configured to: selecting brightness and chrominance data corresponding to the images for correction under the first target gray scale of the first color of the plurality of different colors from the plurality of brightness and chrominance data corresponding to the images for correction under the second target gray scale of the rest colors except the first color of the plurality of different colors from the plurality of; setting a second brightness correction target value according to the plurality of second brightness data; and taking the plurality of second brightness and chrominance data as initial brightness and chrominance data and calculating to obtain second correction data of each pixel point in the plurality of pixel points corresponding to the first color under the first target gray scale by combining the second brightness and chrominance correction target value. The embodiment can calculate the correction data of each pixel point corresponding to any color when the saturation is not 0 under any gray scale.
Optionally, as an embodiment of the present invention, the output module 47 is specifically configured to: sending the correction data set of each of the plurality of pixel points to the display module to be stored in the display module; and/or storing the correction data set of each of the plurality of pixel points to a designated storage device. The embodiment can directly send the correction data set of each pixel point to the display module to be stored for subsequent pixel point-by-pixel point color correction, and also can firstly store the correction data set of each pixel point to a designated storage device for backup or for subsequent transfer to the display module or a control system connected with the display module, or both.
Optionally, as an embodiment of the present invention, the plurality of different colors are a plurality of different primary colors; the correction data set comprises a plurality of correction data subsets respectively corresponding to the different primary colors, each correction data subset comprises a plurality of correction data of the same primary color under different gray scales, and each correction data comprises a plurality of correction coefficients. In this embodiment, correction data corresponding to a plurality of different primary colors (e.g., red, green, and blue) at a plurality of different gray scales can be obtained for each pixel, for example, multi-gray scale correction data of an RGB full-color LED display module can be obtained.
Optionally, as an embodiment of the present invention, the plurality of different colors are a plurality of different primary colors; the correction data set comprises a plurality of correction data subsets respectively corresponding to the different primary colors, each correction data subset comprises a plurality of groups of correction data of the same primary color under different gray scales, each group of correction data comprises a plurality of correction data corresponding to different saturation degrees, and each correction data comprises one or more correction coefficients. According to the embodiment, the correction data sets of a plurality of different primary colors (such as red, green and blue) corresponding to each pixel point under a plurality of different gray scales can be obtained, and the correction data sets are further divided into a plurality of correction data according to different saturation degrees, so that the color correction of the pixel points can be performed on the display module based on the difference of the color gray scales and the saturation degrees, and the image correction effect is further improved.
[ third embodiment ]
Referring to fig. 5, a display module calibration system 50 according to a third embodiment of the present invention includes: a processor 51 and a memory 53 electrically connected to the processor 51; the memory 53 stores instructions executable by the processor 51, and the instructions cause the processor 51 to perform operations to perform the display module calibration method according to the first embodiment.
In addition, other embodiments of the present invention further provide a computer-readable storage medium, which is a non-volatile memory and stores program code, and when the program code is executed by one or more processors, for example, the one or more processors are caused to execute the display module correction method according to the foregoing first embodiment.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and technical solutions of the embodiments can be arbitrarily combined and used without conflict between technical features and structures, and without departing from the purpose of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and/or method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units/modules is only one logical division, and there may be other divisions in actual implementation, for example, multiple units or modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units/modules described as separate parts may or may not be physically separate, and parts displayed as units/modules may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units/modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, each functional unit/module in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units/modules.
The integrated units/modules, which are implemented in the form of software functional units/modules, may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (11)

1. A method for correcting a display module, comprising:
controlling a plurality of pixel points of a display module to display a plurality of correction image groups corresponding to a plurality of different colors, wherein each correction image group comprises a plurality of correction images respectively corresponding to a plurality of different gray scales of the same color;
controlling a plurality of image acquisition devices to acquire the plurality of correction image groups displayed by the plurality of pixel points of the display module so as to obtain a plurality of brightness and chrominance data groups respectively corresponding to the plurality of correction image groups, wherein each brightness and chrominance data group comprises a plurality of brightness and chrominance data respectively corresponding to a plurality of different gray scales;
generating a plurality of correction data of each pixel point under a plurality of different gray scales based on the plurality of brightness and chrominance data sets and a plurality of set correction target values so as to obtain a correction data set of each pixel point in the plurality of pixel points; and
and outputting the correction data set of each pixel point in the plurality of pixel points.
2. The display module correction method of claim 1, further comprising: controlling and conveying the display module to sequentially reach a plurality of different stations;
the control display module's a plurality of pixel point display corresponds a plurality of different colours a plurality of correction with the image group, include:
at each station, controlling the plurality of pixel points of the display module to sequentially display a plurality of correction images corresponding to the same color under a plurality of different gray scales, and enabling the colors corresponding to the correction images displayed by the plurality of pixel points of the display module at the plurality of different stations to be different from each other;
the controlling the plurality of image acquisition devices to acquire the plurality of correction image groups displayed by the plurality of pixel points of the display module includes:
and at each station, controlling one of the image acquisition devices to acquire a plurality of correction images, which are displayed by the pixel points of the display module in sequence and correspond to the same color under different gray scales, wherein the image acquisition devices are respectively arranged corresponding to the different stations.
3. The display module correction method of claim 1, further comprising: controlling and conveying the display module to sequentially reach a plurality of different stations;
the control display module's a plurality of pixel point display corresponds a plurality of different colours a plurality of correction with the image group, include:
at each station, controlling the plurality of pixel points of the display module to sequentially display a plurality of correction images corresponding to the plurality of different colors under the same gray scale, wherein the gray scales corresponding to the correction images displayed by the plurality of pixel points of the display module at the plurality of different stations are different from each other;
the controlling the plurality of image acquisition devices to acquire the plurality of correction image groups displayed by the plurality of pixel points of the display module includes:
and at each station, controlling one of the image acquisition devices to acquire a plurality of images for correction, which are displayed by the pixel points of the display module in sequence and correspond to the different colors under the same gray scale, wherein the image acquisition devices are respectively arranged at the different stations.
4. The method for correcting a display module according to claim 1, wherein the generating a plurality of correction data for each of the pixels at a plurality of different gray scales based on the plurality of luminance-chrominance data sets and a plurality of correction target values to obtain the correction data set for each of the pixels comprises:
selecting a plurality of first brightness and chrominance data corresponding to a plurality of images for correction of different colors under the same first target gray scale from the plurality of brightness and chrominance data groups;
setting a first brightness correction target value according to the plurality of first brightness data;
and calculating to obtain a plurality of first correction data of the plurality of different colors under the first target gray scale corresponding to each pixel point in the plurality of pixel points by taking the plurality of first luminance and chrominance data as initial luminance and chrominance data and combining the first luminance and chrominance correction target value.
5. The method for correcting a display module according to claim 1, wherein the generating of the plurality of correction data for each of the pixels at a plurality of different gray scales based on the plurality of luminance-chrominance data sets and the set plurality of correction target values to obtain the correction data set for each of the pixels in the plurality of pixels further comprises:
selecting brightness and chrominance data corresponding to the images for correction under the first target gray scale of the first color of the plurality of different colors from the plurality of brightness and chrominance data corresponding to the images for correction under the second target gray scale of the rest colors except the first color of the plurality of different colors from the plurality of;
setting a second brightness correction target value according to the plurality of second brightness data;
and calculating to obtain second correction data of the first color under the first target gray scale corresponding to each pixel point in the plurality of pixel points by taking the plurality of second brightness and chrominance data as initial brightness and chrominance data and combining the second brightness and chrominance correction target value.
6. The display module correction method of claim 1, wherein said outputting the correction data set for each of the plurality of pixels comprises:
sending the correction data set of each of the plurality of pixel points to the display module to be stored in the display module; and/or
And storing the correction data set of each pixel point in the plurality of pixel points to a specified storage device.
7. The display module correction method of claim 1, wherein the plurality of different colors are a plurality of different primary colors; the correction data set comprises a plurality of correction data subsets respectively corresponding to the different primary colors, each correction data subset comprises a plurality of correction data of the same primary color under different gray scales, and each correction data comprises a plurality of correction coefficients.
8. The display module correction method of claim 1, wherein the plurality of different colors are a plurality of different primary colors; the correction data set comprises a plurality of correction data subsets respectively corresponding to the different primary colors, each correction data subset comprises a plurality of groups of correction data of the same primary color under different gray scales, each group of correction data comprises a plurality of correction data corresponding to different saturation degrees, and each correction data comprises one or more correction coefficients.
9. A display module calibration apparatus, comprising:
the display control module is used for controlling a plurality of pixel points of the display module to display a plurality of correction image groups corresponding to a plurality of different colors, wherein each correction image group comprises a plurality of correction images respectively corresponding to a plurality of different gray scales of the same color;
the acquisition control module is used for controlling a plurality of image acquisition devices to acquire the plurality of correction image groups displayed by the plurality of pixel points of the display module so as to obtain a plurality of brightness and chrominance data groups respectively corresponding to the plurality of correction image groups, wherein each brightness and chrominance data group comprises a plurality of brightness and chrominance data respectively corresponding to a plurality of different gray scales;
the correction data generation module is used for generating a plurality of correction data of each pixel point under a plurality of different gray scales based on the plurality of brightness and chrominance data sets and a plurality of set correction target values so as to obtain a correction data set of each pixel point in the plurality of pixel points; and
an output module, configured to output the correction data set of each of the plurality of pixel points.
10. A display module calibration system, comprising: a processor and a memory coupled to the processor; wherein the memory stores instructions for execution by the processor and the instructions cause the processor to perform operations to perform a display module correction method according to any one of claims 1 to 8.
11. A calibration system, comprising:
the darkroom comprises a plurality of image acquisition devices and a plurality of stations respectively corresponding to the image acquisition devices;
the conveying equipment is used for sequentially conveying the display modules to the plurality of stations of the plurality of darkrooms; and
a computer system electrically connected to the plurality of image capture devices, the plurality of stations, and the transfer device for performing the display module calibration method of any of claims 1-8.
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