CN112599074B

CN112599074B - Display module correction method, device and system and display screen correction method and device

Info

Publication number: CN112599074B
Application number: CN202010468330.9A
Authority: CN
Inventors: 殷雷; 韦桂锋
Original assignee: Xian Novastar Electronic Technology Co Ltd
Current assignee: Xian Novastar Electronic Technology Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2022-03-22
Anticipated expiration: 2040-05-28
Also published as: CN112599074A

Abstract

The embodiment of the invention relates to a method, a device and a system for correcting a display module. The method for example comprises: i) controlling a plurality of unit blocks of a display module to be corrected to display a plurality of images for correction under a first gray scale in a blocking lighting mode; ii) controlling an image acquisition device to acquire the plurality of images for correction to obtain first color data at a first gray scale; iii) calculating color data of the display module to be corrected under at least one second gray scale according to the first color data and the at least one color difference set to obtain at least one second color data; and iv) generating multiple correction data under multiple different gray scales according to the first color data, the at least one second color data and the set multiple correction target values to obtain multiple gray scale correction data corresponding to the display module to be corrected. The embodiment of the invention can achieve the technical effect of better display uniformity under different gray scales. In addition, the embodiment of the invention also relates to a display screen correction method and device.

Description

Display module correction method, device and system and display screen correction method and device

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, a display screen correction method, and a display screen correction device.

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 correction method is to collect luminance and chrominance data of the highest gray scale of red, green and blue of an LED display device, automatically or manually set a luminance and chrominance correction target value according to the collected luminance and chrominance data, calculate a correction coefficient of each LED light point of each LED pixel point according to the collected luminance and chrominance data and the luminance and chrominance correction target value, and upload the calculated correction coefficient to the LED display device through a signal source input interface (such as a DVI interface) or a communication interface (such as a serial port/USB port/internet port, etc.). Therefore, the existing LED display correction is difficult to solve the problem of inconsistent display uniformity of LED display in low gray and even whole gray stages.

Disclosure of Invention

Therefore, to overcome the defects and shortcomings of the prior art, embodiments of the present invention provide a display module correction method, a display module correction device, a display module correction system, a display screen correction method, and a display screen correction device.

On one hand, a method for correcting a display module provided by an embodiment of the present invention includes: i) controlling a plurality of cell blocks of a display module to be corrected to display a plurality of correction images at a first gray scale in a blocking lighting manner, wherein each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images; ii) controlling an image acquisition device to acquire the plurality of images for correction under the first gray scale so as to obtain first color data of the display module to be corrected under the first gray scale; iii) calculating color data of the display module to be corrected at least one second gray scale according to the first color data and at least one color difference set to obtain at least one second color data, wherein the at least one second gray scale is different from the first gray scale; and iv) generating multiple correction data of the display module to be corrected under multiple different gray scales according to the first color data, the at least one second color data and the set multiple correction target values to obtain multiple gray scale correction data corresponding to the display module to be corrected.

The display module correction method of the embodiment collects color data (such as brightness data or brightness and chrominance data) of a correction image of a certain gray scale of a display module to be corrected, calculates color data of other one or more gray scales through a color difference set (such as a brightness difference set or a brightness and chrominance difference set) among different gray scales, and then calculates multi-gray scale correction data (such as multi-gray scale brightness correction data or multi-gray scale brightness correction data) of the display module to be corrected based on the collected and calculated color data, so that multi-gray scale correction (such as multi-gray scale brightness correction or multi-gray scale brightness and chrominance correction) can be realized, and the technical effect of better display uniformity under different gray scales can be realized; in addition, because the image acquisition equipment does not need to be controlled to acquire the images for correction of the display module to be corrected under a plurality of different gray scales, the correction efficiency can be improved; in addition, the adoption of the partition block lighting mode can increase the number of pixel points acquired at a time and reduce the image acquisition times, thereby shortening the correction time and further improving the correction efficiency.

In an embodiment of the present invention, each of the pixel points includes a plurality of primary color sub-pixels respectively corresponding to a plurality of different primary colors; each color difference set in the at least one color difference set comprises a plurality of color proportion groups respectively corresponding to the plurality of different primary colors; the calculating color data of the display module to be corrected under at least one second gray scale according to the first color data and at least one color difference set to obtain at least one second color data includes: and obtaining multiple color data respectively corresponding to the multiple different primary colors under the target gray scale according to multiple color data respectively corresponding to the multiple different primary colors in the first color data and the multiple color proportion groups in the color difference set corresponding to the target gray scale, wherein the multiple color data are used as one of the at least one second color data, and the target gray scale is one of the at least one second gray scale.

In an embodiment of the invention, each of the color scale groups includes a plurality of color scale sub-groups respectively corresponding to the plurality of unit blocks, and each of the color scale sub-groups includes a plurality of scales.

In an embodiment of the present invention, the display module correction method further includes: controlling a plurality of cell blocks of each of a plurality of sample display modules to display a plurality of images for correction at N different gray levels in the blocking illumination mode, wherein N is a positive integer greater than 1, and the N different gray levels include the first gray level and the at least one second gray level; controlling an image acquisition device to acquire the plurality of images for correction at the N different gray scales displayed by the plurality of cell blocks of each sample display module in the blocking lighting manner to acquire a plurality of sample color data of each sample display module of a plurality of sample display modules at the N different gray scales; and obtaining the at least one color difference set corresponding to the at least one second gray scale according to the sample color data of the sample display modules under the N different gray scales.

In an embodiment of the invention, obtaining the at least one color difference set corresponding to the at least one second gray scale according to the sample color data of the sample display modules at the N different gray scales respectively includes: calculating the mean value of a plurality of sample color data under each gray scale according to the plurality of sample display modules to obtain N color data mean values corresponding to the N different gray scales, wherein the N color data mean values comprise a first color data mean value corresponding to the first gray scale and at least one second color data mean value corresponding to the at least one second gray scale; and calculating the difference of the at least one second color data mean value relative to the first color data mean value by taking the first color data mean value as a reference to obtain the at least one color difference set in one-to-one correspondence with the at least one second color data mean value.

In one embodiment of the present invention, each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the calculating, according to the average values of the plurality of sample color data of the plurality of sample display modules at each gray scale, to obtain N average values of the color data corresponding to the N different gray scales, respectively, includes: and calculating the average value of the color data in the plurality of sample color data of the unit blocks positioned at the same position in the plurality of sample display modules under the same gray scale.

In one embodiment of the present invention, each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the calculating, according to the average values of the plurality of sample color data of the plurality of sample display modules at each gray scale, to obtain N average values of the color data corresponding to the N different gray scales, respectively, includes: calculating a cell block color data mean value of each sample color data in a plurality of sample color data of the plurality of sample display modules under the same gray scale to obtain a plurality of cell block color data mean values; and averaging the color data mean values of the plurality of unit blocks to obtain one color data mean value corresponding to the same gray scale in the N color data mean values.

In one embodiment of the present invention, the controlling the image capturing device to capture the plurality of images for correction at the N different gray scales displayed by the plurality of unit blocks of each of the sample display modules in the blocking lighting manner to obtain the plurality of sample color data at the N different gray scales for each of the plurality of sample display modules includes: and controlling a plurality of image acquisition devices to respectively acquire images of the plurality of sample display modules.

In another aspect, an embodiment of the present invention provides a display module calibration apparatus, including: a display control module for controlling a plurality of cell blocks of a display module to be corrected to display a plurality of images for correction in a first gray scale in a blocking lighting manner, wherein each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images; the acquisition control module is used for controlling the image acquisition equipment to acquire the plurality of images for correction under the first gray scale so as to obtain first color data of the display module to be corrected under the first gray scale; the data calculation module is used for calculating color data of the display module to be corrected under at least one second gray scale according to the first color data and at least one color difference set so as to obtain at least one second color data, wherein the at least one second gray scale is different from the first gray scale; and the correction data generating module is used for generating multiple copies of correction data of the display module to be corrected under multiple different gray scales according to the first color data, the at least one second color data and the set multiple correction target values so as to obtain the multiple gray scale correction data corresponding to the display module to be corrected.

The display module correction device of the embodiment is characterized in that the acquisition control module controls and acquires color data (such as brightness data or brightness and chrominance data) of a correction image of a certain gray scale of the display module to be corrected, the data calculation module calculates and obtains color data of other one or more gray scales through a color difference set (such as a brightness difference set or a brightness and chrominance difference set) among different gray scales, and then the correction data generation module calculates and obtains multi-gray scale correction data (such as multi-gray scale brightness correction data or multi-gray scale brightness and chrominance correction data) of the display module to be corrected based on the plurality of acquired and calculated color data, so that multi-gray scale correction (such as multi-gray scale brightness correction or multi-gray scale brightness and chrominance correction) can be realized, and the technical effect of better display uniformity under different gray scales can be achieved; in addition, because the image acquisition equipment does not need to be controlled to acquire the images for correction of the display module to be corrected under a plurality of different gray scales, the correction efficiency can be improved; in addition, the adoption of the partition block lighting mode can increase the number of pixel points acquired at a time and reduce the image acquisition times, thereby shortening the correction time and further improving the correction efficiency.

In an embodiment of the present invention, each of the pixel points includes a plurality of primary color sub-pixels respectively corresponding to a plurality of different primary colors; each color difference set in the at least one color difference set comprises a plurality of color proportion groups respectively corresponding to the plurality of different primary colors; the data calculation module comprises: and obtaining multiple color data respectively corresponding to the multiple different primary colors under the target gray scale according to multiple color data respectively corresponding to the multiple different primary colors in the first color data and the multiple color proportion groups in the color difference set corresponding to the target gray scale, wherein the multiple color data are used as one of the at least one second color data, and the target gray scale is one of the at least one second gray scale.

In one embodiment of the present invention, the display module correction apparatus further includes: a sample display control module for controlling a plurality of cell blocks of each of a plurality of sample display modules to display a plurality of correction images at N different gray levels in the blocking illumination mode, wherein N is a positive integer greater than 1, and the N different gray levels include the first gray level and the at least one second gray level; a sample collection control module for controlling the image collection device to collect the plurality of images for correction at the N different gray scales displayed by the plurality of cell blocks of each sample display module in the blocking illumination manner, so as to obtain a plurality of sample color data of each sample display module of the plurality of sample display modules at the N different gray scales; and the gray scale difference acquisition module is used for obtaining the at least one color difference set corresponding to the at least one second gray scale according to the sample color data of the sample display modules under the N different gray scales.

In an embodiment of the present invention, the gray scale difference obtaining module includes: a sample mean value calculation sub-module, configured to calculate a mean value of a plurality of sample color data under each gray scale according to the plurality of sample display modules, so as to obtain N color data mean values corresponding to the N different gray scales, respectively, where the N color data mean values include a first color data mean value corresponding to the first gray scale and at least one second color data mean value corresponding to the at least one second gray scale; and the gray scale difference calculation submodule is used for calculating the difference of the at least one second color data mean value relative to the first color data mean value by taking the first color data mean value as a reference so as to obtain the at least one color difference set which is in one-to-one correspondence with the at least one second color data mean value.

In one embodiment of the present invention, each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the sample mean calculation sub-module includes: and the cell block-by-cell block average value calculating unit is used for calculating the average value of the color data in the sample color data of the cell blocks positioned at the same position in the sample display modules under the same gray scale.

In one embodiment of the present invention, each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the sample mean calculation sub-module includes: a sample cell block average value calculation unit configured to calculate a cell block color data average value of each of the plurality of sample color data of the plurality of sample display modules at the same gray scale to obtain a plurality of cell block color data average values; and a cell block averaging unit configured to average the plurality of cell block color data averages to obtain one of the N color data averages corresponding to the same gray level.

In one embodiment of the invention, the sample acquisition control module comprises means for: and controlling a plurality of image acquisition devices to respectively acquire images of the plurality of sample display modules.

On the other hand, 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 a display module correction method as described in any of the previous embodiments.

In another aspect, a method for correcting a display screen according to an embodiment of the present invention includes: a) controlling a plurality of cell blocks of each of a plurality of partitions of a target display screen to display a plurality of correction images at M different gray scales in a blocking lighting manner, wherein M is a positive integer greater than 1, each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images; b) controlling an image capturing device to capture the plurality of images for correction at the M different gray scales displayed by the plurality of unit blocks of each of the partitions in the block-by-block lighting manner to obtain a plurality of color data (e.g., luminance data or luminance-chrominance data) at the N different gray scales for each of the plurality of partitions; c) generating multiple correction data of the target display screen under the N different gray scales according to the color data of each partition in the multiple partitions under the N different gray scales and the set correction target values to obtain multiple gray scale correction data corresponding to the target display screen; and d) outputting the multi-gray-scale correction data to the target display screen for storage.

According to the display screen correction method provided by the embodiment of the invention, the multi-gray scale correction is realized by a correction mode of combining partition and spacer acquisition on the target display screen, the technical effect of better display uniformity under different gray scales can be realized, the number of pixel points acquired at one time can be increased, the image acquisition times can be reduced, and the correction time is shortened so as to improve the correction efficiency.

In still another aspect, an embodiment of the present invention provides a display screen calibration apparatus, including: a partition display control module for controlling a plurality of cell blocks of each of a plurality of partitions of a target display screen to display a plurality of correction images at M different gray levels in a partition lighting manner, wherein M is a positive integer greater than 1, each of the cell blocks includes a plurality of pixel points, and the partition lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images; a partition acquisition control module configured to control an image acquisition device to acquire the plurality of correction images at the M different gray scales displayed by the plurality of cell blocks of each of the partitions in the partition lighting manner, so as to acquire a plurality of color data of each of the plurality of partitions at the M different gray scales; a correction data generating module, configured to generate multiple sets of correction data of the target display screen at the M different gray scales according to the multiple color data of each of the multiple partitions at the M different gray scales and multiple set correction target values, so as to obtain multiple gray scale correction data corresponding to the target display screen; and the correction data output module is used for outputting the multi-gray-scale correction data to the target display screen for storage.

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 collect color data, such as brightness data or brightness and chroma data, of a correction image of a certain gray scale of a display module to be corrected, obtain color data of other one or more gray scales through a color difference set (such as a brightness difference set or a brightness and chroma difference set) among different gray scales, and then obtain multi-gray scale correction data of the display module to be corrected through calculation based on the collected and calculated color data, so that multi-gray scale correction can be realized, and the technical effect of better display uniformity under different gray scales can be realized; in addition, because the image acquisition equipment does not need to be controlled to acquire the images for correction of the display module to be corrected under a plurality of different gray scales, the correction efficiency can be improved; in addition, the adoption of the partition block lighting mode can increase the number of pixel points acquired at a time and reduce the image acquisition times, thereby shortening the correction time and further improving the correction efficiency. Furthermore, the display screen correction method and device of the embodiment of the invention can realize multi-gray scale correction by performing a correction mode combining partition and partition acquisition on the target display screen, can realize the technical effect of better display uniformity under different gray scales, and can increase the number of pixel points acquired at one time and reduce the image acquisition times, thereby shortening the correction time and improving the correction efficiency.

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 an implementation manner of a display module calibration method according to a first embodiment of the present invention.

Fig. 2A is a partial schematic flow chart of another embodiment of a display module calibration method according to a first embodiment of the present invention.

Fig. 2B is a flowchart illustrating a sub-step of step S14c in fig. 2A.

Fig. 2C is a schematic diagram of a calibration system suitable for the calibration method of the display module shown in fig. 1.

Fig. 3A-3D are schematic process diagrams of a spacer-illumination mode.

FIG. 4 is a schematic diagram of a calibration system suitable for the display module calibration method shown in FIG. 2A.

Fig. 5 is a block diagram illustrating an embodiment of a display module calibration apparatus according to a second embodiment of the present invention.

Fig. 6 is a block diagram illustrating another embodiment of a display module calibration apparatus according to a second embodiment of the present invention.

Fig. 7A is a schematic diagram of a unit configuration of the sample mean calculation module shown in fig. 6.

Fig. 7B is a schematic diagram of another unit configuration of the sample mean calculation module shown in fig. 6.

Fig. 8 is a schematic structural diagram of a display module calibration system according to a third embodiment of the invention.

Fig. 9 is a flowchart illustrating an implementation manner of a display screen calibration method according to a fourth embodiment of the present invention.

Fig. 10 is a block diagram illustrating an implementation manner of a display screen calibration apparatus according to a fifth embodiment of the present 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 cell blocks of a display module to be corrected to display a plurality of correction images at a first gray scale in a blocking lighting manner, wherein each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images;

s13: controlling an image acquisition device to acquire the plurality of images for correction under the first gray scale so as to obtain first color data of the display module to be corrected under the first gray scale;

s15: calculating color data of the display module to be corrected under at least one second gray scale according to the first color data and at least one color difference set to obtain at least one second color data, wherein the at least one second gray scale is different from the first gray scale;

s17: and generating multiple correction data of the display module to be corrected under multiple different gray scales according to the first color data, the at least one second color data and the set multiple correction target values to obtain multiple gray scale correction data corresponding to the display module to be corrected.

The display module correction method of the embodiment collects color data of a correction image of a certain gray scale of a display module to be corrected, obtains color data of other one or more gray scales through color difference set calculation among different gray scales, and then obtains multi-gray scale correction data of the display module to be corrected through calculation based on the collected and calculated multiple color data, so that multi-gray scale correction can be realized, and the problem of inconsistent display uniformity under different gray scales can be solved; in addition, because the image acquisition equipment does not need to be controlled to acquire the images for correction of the display module to be corrected under a plurality of different gray scales, the correction efficiency can be improved; in addition, the adoption of the partition block lighting mode can increase the number of pixel points acquired at a time and reduce the image acquisition times, thereby shortening the correction time and further improving the correction efficiency. It should be noted that, when the color data is luminance data and the color difference set is a luminance difference set, the multi-gray-scale correction data may be multi-gray-scale luminance correction data; or, when the color data is a luminance and chrominance data and the color difference set is a luminance and chrominance difference set, the multi-gray-scale correction data may be multi-gray-scale luminance and chrominance correction data.

Optionally, as an embodiment of the present invention, each of the pixel points includes a plurality of primary color sub-pixels respectively corresponding to a plurality of different primary colors; the step S11 includes: controlling to light the specified position unit block of the plurality of unit blocks with the first gray scale to display a primary color image corresponding to a target primary color, but not controlling to light the plurality of peripheral position unit blocks of the plurality of unit blocks adjacent to the specified position unit block, to obtain one of the plurality of images for correction, wherein the target primary color is one of the plurality of different primary colors; and changing positions of the specified-position cell blocks to obtain changed specified-position cell blocks, and controlling lighting of the changed specified-position cell blocks of the plurality of cell blocks with the first gray scale to display a primary color image corresponding to the target primary color, but not controlling lighting of a plurality of peripheral position cell blocks adjacent to the changed specified-position cell blocks of the plurality of cell blocks to obtain another correction image of the plurality of correction images. In the embodiment, the multi-primary display module, for example, an RGB full-color LED display module, can be controlled to display the correction image in a partition lighting manner, so that the number of pixels collected at a single time is increased, and the number of times of image collection is reduced.

Optionally, as an embodiment of the present invention, each of the color difference sets in the at least one color difference set includes a plurality of color proportion groups respectively corresponding to the plurality of different primary colors; the step S15 includes: and obtaining multiple color data respectively corresponding to the multiple different primary colors under the target gray scale according to multiple color data respectively corresponding to the multiple different primary colors in the first color data and the multiple color proportion groups in the color difference set corresponding to the target gray scale, wherein the multiple color data are used as one of the at least one second color data, and the target gray scale is one of the at least one second gray scale. The present embodiment represents the color difference set between different gray scales by a luminance ratio or a brightness ratio, for example, the brightness ratio is represented by the difference ratio of the XYZ three components of the XYZ color space, but the embodiment of the present invention is not limited to the XYZ color space, and may be other color spaces such as the Yxy color space.

Optionally, as an embodiment of the present invention, each of the color scale groups includes a plurality of color scale sub-groups respectively corresponding to the plurality of cell blocks, and each of the color scale sub-groups includes a plurality of scales. In this embodiment, each cell block has its own color scale subset, i.e., different cell blocks have their own different color scale subsets; of course, in other embodiments, all the cell blocks of the display module to be corrected may share the same color ratio under the same primary color, and different primary colors correspond to different color ratio groups.

Optionally, as an embodiment of the present invention, as shown in fig. 2A, the display module correction method further includes:

s14 a: controlling a plurality of cell blocks of each of a plurality of sample display modules to display a plurality of images for correction at N different gray levels in the blocking illumination mode, wherein N is a positive integer greater than 1, and the N different gray levels include the first gray level and the at least one second gray level;

s14 b: controlling an image acquisition device to acquire the plurality of images for correction at the N different gray scales displayed by the plurality of cell blocks of each sample display module in the blocking lighting manner to acquire a plurality of sample color data of each sample display module of a plurality of sample display modules at the N different gray scales;

s14 c: and obtaining the at least one color difference set corresponding to the at least one second gray scale according to the sample color data of the sample display modules under the N different gray scales.

In the present embodiment, a plurality of sample display modules are subjected to image acquisition to determine a color difference set, such as a brightness difference set or a brightness difference set, between N different gray levels, for use in the step S15.

Optionally, as an embodiment of the present invention, as shown in fig. 2B, step S14c includes, for example:

s14c 1: calculating the mean value of a plurality of sample color data under each gray scale according to the plurality of sample display modules to obtain N color data mean values corresponding to the N different gray scales, wherein the N color data mean values comprise a first color data mean value corresponding to the first gray scale and at least one second color data mean value corresponding to the at least one second gray scale;

s14c 2: and calculating the difference of the at least one second color data mean value relative to the first color data mean value by taking the first color data mean value as a reference to obtain the at least one color difference set in one-to-one correspondence with the at least one second color data mean value.

Optionally, as an embodiment of the present invention, each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the step S14c1 includes: and calculating the average value of the color data in the plurality of sample color data of the unit blocks positioned at the same position in the plurality of sample display modules under the same gray scale. The embodiment may obtain the color data mean values (e.g., the luminance data mean value or the luminance and chrominance data mean value) of the plurality of sample display modules in the same gray scale unit block by unit block, so that the unit blocks at different positions have different respective color data mean values, which may make the at least one second color data obtained in the step S15 more accurate.

Optionally, as an embodiment of the present invention, each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the step S14c1 includes: calculating a cell block color data mean value (e.g., a cell block luminance data mean value or a cell block luminance chroma data mean value) of each sample color data of a plurality of sample color data of the plurality of sample display modules at the same gray scale to obtain a plurality of cell block color data mean values; and averaging the color data mean values of the plurality of unit blocks to obtain one color data mean value corresponding to the same gray scale in the N color data mean values. In this embodiment, the overall color mean value of each of the plurality of sample display modules at the same gray scale (i.e. the color data of all the cell blocks of the plurality of sample display modules at the same gray scale are summed and averaged) is first calculated as the cell block color data mean value, and then the plurality of cell block color data mean values respectively corresponding to the plurality of sample display modules are averaged, so as to obtain one color data mean value corresponding to the same gray scale, which can improve the calculation efficiency of obtaining the at least one second color data in the subsequent step S15.

Optionally, as an embodiment of the present invention, the step S14b includes: and controlling a plurality of image acquisition devices to respectively acquire images of the plurality of sample display modules. The embodiment can improve the image acquisition efficiency of the plurality of sample display modules.

In order to more clearly understand the display module calibration method of this embodiment, an LED display box is taken as an implementation of the to-be-calibrated display module and the sample display module, and the brightness calibration of the display module is taken as an example, and is described in detail by way of example with reference to the calibration system shown in fig. 2C. The LED display box herein includes, for example, one or more LED lamp panels including a plurality of LED pixel points, and a display control card (such as an existing receiving card, a scanning card, or a module controller) electrically connected to the LED lamp panels, where each LED pixel point includes, for example, three primary color LED lamps, such as a red LED lamp, a green LED lamp, and a blue LED lamp; moreover, each of the LED pixels, for example, 2 × 2 LED pixels, form a unit block (or referred to as abstract pixel), and the partition lighting manner is, for example, that each 2 × 2 unit blocks are sequentially controlled to be lighted.

Specifically, as shown in fig. 2C, the correction system 20 of the present embodiment includes: a computer system 21 and a dark room 23. The darkroom 23 includes an image capturing device 231, and the darkroom 23 is used for providing a darkroom environment for the display module 300 to be corrected or the sample display module 500 to prevent ambient light from interfering with image capturing accuracy. The computer system 21 includes, for example, one or more computers installed with calibration software and display control software, and is electrically connected to the image capturing device 231 to control the image capturing device 231 to perform image capturing and display control on the display module 300 to be calibrated or the sample display module 500.

As mentioned above, before the display module 300 to be corrected is corrected, it is first required to obtain the luminance and chrominance difference information (or called luminance and chrominance difference set) between a plurality of different gray scales based on the plurality of sample display modules 500.

For example, assuming that the uniformity of a batch of display modules is not consistent among the gray scales 0-10, 10-30, 30-100, and 100-255, N display modules can be arbitrarily taken out of the batch of display modules as N sample display modules 500, and then the sample display modules 500 loaded in the darkroom 23 are controlled to sequentially display red (R), green (G), and blue (B) images at four different gray scales, such as 8, 16, 64, and 255, for example, in a blocking lighting manner based on the calibration system 20 shown in FIG. 2C. It should be noted that the gray levels 8, 16, 64 and 255 are only examples, and can be other four gray levels respectively selected from the gray levels 0-10, 10-30, 30-100 and 100-255; even according to the different range of each interval with inconsistent uniformity of each batch of display modules, the number of the selected gray scales can be adjusted.

The computer system 21, for example, controls the 1 st sample display module 500 to sequentially display a red image, a green image, and a blue image in gray scale 8, gray scale 16, gray scale 64, and gray scale 255 in a blocking lighting manner (corresponding to step S14a), and controls the image acquisition device 231 to perform image acquisition and perform image processing on each acquired image, such as existing mature region positioning and point positioning, so as to obtain sample luminance and chrominance data corresponding to gray scale 8 as D11, sample luminance and chrominance data corresponding to gray scale 16 as D12, sample luminance and chrominance data corresponding to gray scale 64 as D13, and sample luminance and chrominance data corresponding to gray scale 255 as D14. It is understood that, in a similar manner, the 2 nd sample display module 500 may obtain the sample luminance and chrominance data D21 corresponding to the gray scale 8, the sample luminance and chrominance data D22 corresponding to the gray scale 16, the sample luminance and chrominance data D23 corresponding to the gray scale 64, and the sample luminance and chrominance data D24 corresponding to the gray scale 255; by analogy, the sample luminance and chrominance data Dn1 corresponding to the gray scale 8, the sample luminance and chrominance data Dn2 corresponding to the gray scale 16, the sample luminance and chrominance data Dn3 corresponding to the gray scale 64, and the sample luminance and chrominance data Dn4 corresponding to the gray scale 255 of the nth sample display module 500 can be obtained (corresponding to step S14 b).

Next, the average of the luminance and chrominance data D, and Dn of the N sample display modules 500 at the gray level 8 is calculated as luminance and chrominance data average Davg, the average of the luminance and chrominance data D, and Dn of the N sample display modules 500 at the gray level 16 is calculated as luminance and chrominance data average Davg, the average of the luminance and chrominance data D, and Dn of the N sample display modules 500 at the gray level 64 is calculated as luminance and chrominance data average Davg, and the average of the luminance and chrominance data D, and Dn of the N sample display modules 500 at the gray level 255 is calculated as luminance and chrominance data average Davg, respectively, according to the luminance and chrominance data D, and Dn (corresponding to step S14 c).

There are two cases of the contents of the bright-chroma data mean values Davg1, Davg2, Davg3 and Davg4, taking the bright-chroma data mean value Davg1 as an example: in the first case, the luminance and chrominance data of each unit block at the same position in the luminance and chrominance data D11, D21, …, and Dn1 of the N sample display modules 500 are counted one by one and averaged to obtain the average value of the luminance and chrominance data of each unit block at the same position under the gray scale 8, so that the average value of the luminance and chrominance data of each unit block under the gray scale 8 forms a luminance and chrominance data average value matrix as the luminance and chrominance data average value Davg 1; in the second case, the luminance and chrominance data mean values of all the cell blocks on each of the N sample display modules 500 are counted as the cell block luminance and chrominance data mean value, and then the luminance and chrominance data mean values Davg1 can be obtained by averaging the N cell block luminance and chrominance data mean values respectively corresponding to the N sample display modules 500.

Then, based on the bright-chroma data mean values Davg1, Davg2, Davg3 and Davg4, it is possible to calculate, as needed, a bright-chroma Ratio set Ratio2, Ratio3 and Ratio4 of other bright-chroma data mean values Davg2, Davg3 and Davg4 relative to the reference Davg1 as an embodiment of a bright-chroma difference set of gray levels 16, 64 and 255 relative to gray level 8, respectively, based on one bright-chroma data mean value Davg1, e.g., Davg1 (corresponding to step S14c 2). More specifically, if the set of luminance-chrominance differences between the respective gray levels is a set of luminance-chrominance ratios, for the first case, the set of luminance-chrominance ratios between the two gray levels includes a plurality of sets of luminance-chrominance ratios respectively corresponding to a plurality of different primary colors (e.g., R, G, B), each of the sets of luminance-chrominance ratios includes a plurality of sub-sets of luminance-chrominance ratios respectively corresponding to a plurality of unit blocks on a single sample display module 500, and each of the sub-sets of luminance-chrominance ratios includes a plurality of ratios (e.g., ratios of three components of the XYZ color space); for the second case, the set of luminance-chrominance ratios between two gray levels includes a plurality of luminance-chrominance ratio sets respectively corresponding to a plurality of different primary colors (e.g., R, G, B), and each of the luminance-chrominance ratio sets includes a plurality of ratios (e.g., ratios of three components of the XYZ color space).

After acquiring the luminance and chrominance difference sets between different gray scales, such as gray scale 8, gray scale 16, gray scale 64, and gray scale 255, the calibration system 20 shown in fig. 2C may be used to sequentially use the remaining display modules of the batch of display modules, except the N sample display modules 500, as the display modules 300 to be calibrated and load the display modules into the darkroom 23 for calibration.

Specifically, the computer system 21 controls the to-be-corrected display module 300 loaded in the darkroom 23 to sequentially display the red image, the green image and the blue image at the gray scale 8 in a blocking lighting manner (corresponding to step S11), and the computer system 21 controls the image capturing device 231 to capture the red image, the green image and the blue image at the gray scale 8 sequentially displayed by the to-be-corrected display module 300, so as to obtain three sets of luminance and chrominance data of red, green and blue of all the cell blocks of the to-be-corrected display module 300 at the gray scale 8 as the first color data, such as the first luminance and chrominance data in the aforementioned step S13. It should be noted here that, alternatively, the to-be-corrected display module 300 may be controlled to sequentially display the red image, the green image and the blue image at the gray scale 16 and control the image capturing device 231 to capture the images, and accordingly, the step S14c2 should use the bright-chrominance data mean value Davg2 as a reference to calculate a bright-chrominance proportion set of other bright-chrominance data mean values, such as Davg1, Davg3, Davg4 relative to the reference Davg2, as an embodiment of a bright-chrominance difference set of the gray scale 8, the gray scale 64 and the gray scale 255 relative to the gray scale 16.

Then, based on the first luminance and chrominance data at gray scale 8 and luminance and chrominance difference sets Ratio2, Ratio3, and Ratio4 of one or more other gray scales, such as gray scale 16, gray scale 64, and gray scale 255, with respect to gray scale 8, matrix operation is performed on the first luminance and chrominance data and luminance and chrominance difference sets Ratio2, Ratio3, and Ratio4, so that three second color data, such as luminance and chrominance data, corresponding to gray scale 16, gray scale 64, and gray scale 255, respectively, can be obtained (corresponding to step S15).

Next, based on the first luminance and chrominance data corresponding to the gray scale 8 and the three second luminance and chrominance data corresponding to the gray scale 16, the gray scale 64 and the gray scale 255 of the display module 300 to be corrected, the multiple correction data of the display module 300 to be corrected under the different gray scales, such as the gray scale 8, the gray scale 16, the gray scale 64 and the gray scale 255, can be generated as the multiple gray scale correction data of the display module 300 to be corrected by combining the set multiple correction target values (corresponding to step S17).

For example, when the correction data of each unit block of the display module 300 to be corrected is calculated when the saturation of the unit block is 0 at the gray scale 16, since different saturations require the original luminance and chrominance data to be obtained by mixing the original luminance and chrominance data at different RGB ratios, three luminance and chrominance data corresponding to the red image at the gray scale 16, the green image at the gray scale 16, and the blue image at the gray scale 16 may be selected, and the luminance and chrominance correction target value may be 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 same-color brightness values of a plurality of unit blocks (or abstract pixel points) to remove the unit blocks with too low brightness values and then averaging the brightness values of the remaining unit blocks, or the brightness average value is properly 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 unit block including the three-color LED lamps of red, green, and blue to obtain a corresponding color gamut, and obtaining a common color gamut of each unit block 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 unit block with the saturation of 0 under the gray scale 16 can be obtained based on the existing mature brightness and chrominance correction coefficient calculation method, for example, the correction data of each unit block with the saturation of 0 under the gray scale 16 comprises correction data corresponding to a red LED lamp and comprising a 1 x 3 coefficient matrix, correction data corresponding to a green LED lamp and comprising a 1 x 3 coefficient matrix, and correction data corresponding to a blue LED lamp and comprising a 1 x 3 coefficient matrix.

When the correction data of each unit block with the saturation of not 0 (for example, the saturation of 0.5) at the gray scale 16 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, the green image at the gray scale 8 and the blue image at the gray scale 8 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 chrominance correction target value is set, the three brightness and chrominance data are used as original brightness and chrominance data, and correction data which correspond to the red LED lamp in each unit block 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 chrominance correction coefficient calculation method. Similarly, the correction data containing the 1 × 3 coefficient matrix corresponding to the green LED lamp in each unit block 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 the blue LED lamp in each unit block 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, in some embodiments, only the correction data of each unit block with saturation of 0 at a plurality of different gray levels may be calculated, and the correction data of each unit block with saturation of non-0 at a plurality of different gray levels may not be calculated, which may also solve the problem of inconsistent display uniformity at different gray levels to some extent.

As mentioned above, for the multiple correction data corresponding to the multiple different gray scales in the multiple gray scale correction data of the display module 300 to be corrected, the saturation may not be distinguished, and different saturations may also be distinguished.

(I) In the case of not distinguishing the saturation, the multi-gray-scale correction data corresponding to four different gray scales is taken as an example, and the content form is shown in table 1.

TABLE 1 content form of multi-gray scale correction data (no differentiation of saturation)

Red multi-gray-scale correction data	Green multi-gray-scale correction data	Blue multi-gray-scale correction data
			L8	L8	L8
L16	L16	L16
			L64	L64	L64
L255	L255	L255

L8, L16, L64 and L255 in table 1 indicate correction data for the red, green and blue LED lamps in the respective unit blocks at gray scale 8, gray scale 16, gray scale 64 and gray scale 255, respectively.

(II) in the case of saturation differentiation, take the multi-gray level correction data corresponding to R saturations at four different gray levels as an example, the content form is shown in Table 2.

TABLE 2 content form of multi-gray scale correction data (differential saturation)

In table 2, L8, L16, L64 and L255 respectively indicate correction data sets of the red, green and blue LED lamps in the respective unit blocks at gray scale 8, gray scale 16, gray scale 64 and gray scale 255, and Sat1, Sat2, … and SatR respectively indicate correction data corresponding to M different saturations in a single correction data set.

The foregoing spacer lighting manner will be exemplified with reference to fig. 3A to 3D. Referring to fig. 3A-3D, it is shown that a single cell block is composed of 2 × 2 LED pixels, the partition lighting mode is a sequential lighting mode of 2 × 2 cell blocks, and for convenience of description, it is assumed that a single display module (e.g., the sample display module 500 or the display module 300 to be calibrated) contains sixty-four cell blocks, but is not used to limit the number of cell blocks in the single display module.

Specifically, for example, a single LED pixel includes three primary color LED lamps of red, green, and blue, since the partition block lighting manner is a sequential lighting manner of 2 × 2 unit blocks, every four unit blocks are regarded as a unit block group. In capturing a red image, it is possible to control lighting of the unit block M1 in each unit block group but not control lighting of the plurality of unit blocks at the peripheral positions adjacent to the unit block M1 (as shown in fig. 3A) and control image capturing to obtain a first red image, control lighting of the unit block M2 in each unit block group but not control lighting of the plurality of unit blocks at the peripheral positions adjacent to the unit block M2 (as shown in fig. 3B) and control image capturing to obtain a second red image, control lighting of the unit block M3 in each unit block group but not control lighting of the plurality of unit blocks at the peripheral positions adjacent to the unit block M3 (as shown in fig. 3C) and control image capturing to obtain a third red image, control lighting of the unit block M4 in each unit block group but not control lighting of the plurality of unit blocks adjacent to the unit block M4 (as shown in fig. 3D) and control image capturing to obtain a third red image Four red images; the four red images are subjected to image processing and luminance and chrominance data fusion according to the positions of the unit blocks, so that a part of luminance and chrominance data of the display module shown in the figures 3A-3D, which corresponds to red under a certain gray scale, can be obtained. Similarly, a part of luminance and chrominance data of the display module shown in fig. 3A to 3D corresponding to green under a certain gray scale can be obtained by performing image processing on the four green images, and a part of luminance and chrominance data of the display module shown in fig. 3A to 3D corresponding to blue under a certain gray scale can be obtained by performing image processing on the blue images. In this example, each 2 × 2 LED pixel points are abstracted into one pixel point and used as a unit block (or abstract pixel point), so that the real resolution of single acquisition is increased by multiple times, for example, 2 × 2 is increased by 4 times, thereby greatly increasing the correction efficiency. In addition, it is noted that the number of LED pixels in a single cell block is not limited to 2 × 2, and may be K × L, K, L is a positive integer and at least one is greater than 1, the partition block lighting manner is not limited to 2 × 2 cell blocks sequentially lighting manner, and may be P × Q cell blocks sequentially lighting manner, and P, Q is all positive integers greater than 1; further, any one of the cell blocks M1, M2, M3, M4 (e.g., M1) may be used as the aforementioned specified position cell block, and the other cell blocks (e.g., M2, M3, M4) may be used as the changed specified position cell block after the position of the specified position cell block is changed.

Since the present embodiment uses K × L pixels, such as K × L LED pixels, as a unit block and performs image display and acquisition by using a P × Q barrier block lighting method, after acquiring the correction data of the display module 300 to be corrected at a plurality of different gray scales (even a plurality of different saturations at a plurality of different gray scales) to obtain the multi-gray-scale correction data, the multi-gray-scale correction data can be subjected to data expansion, namely the correction data of each unit block is expanded to the real pixel point-by-pixel point correction data inside each unit block, and if the correction data of a single unit block is COEF, all real pixel points inside the single unit block use COEF as final correction data, and then the multi-gray-scale correction data subjected to data expansion is output to the display module 300 to be corrected for storage and/or is associated with the unique identifier of the display module 300 to be corrected for storage in a database; or, the multi-gray-scale correction data is not subjected to data expansion, but the multi-gray-scale correction data (or called the multi-gray-scale correction data per unit block) is directly output to the display module 300 to be corrected for storage and/or is stored in the database in association with the unique identifier of the display module 300 to be corrected, and then a new multi-gray-scale correction data per pixel point is automatically copied according to the unit block when the multi-gray-scale correction data per unit block is used for normal image display of the display module 300 to be corrected (that is, the multi-gray-scale correction data per unit block is subjected to data expansion according to the real pixel point).

In summary, the display module calibration method of the embodiment collects color data, such as luminance data or luminance and chrominance data, of a calibration image of a certain gray scale of a display module to be calibrated, calculates a color difference set, such as a luminance difference set or a luminance and chrominance difference set, between different gray scales to obtain luminance data or luminance and chrominance data of one or more other gray scales, and calculates multi-gray scale calibration data of the display module to be calibrated based on the collected and calculated luminance data or luminance and chrominance data, so that multi-gray scale calibration can be realized, and a technical effect of better display uniformity under different gray scales can be achieved; in addition, because the image acquisition equipment does not need to be controlled to acquire the images for correction of the display module to be corrected under a plurality of different gray scales, the correction efficiency can be improved; in addition, the adoption of the partition block lighting mode can increase the number of pixel points acquired at a time and reduce the image acquisition times, thereby shortening the correction time and further improving the correction efficiency.

Furthermore, in other embodiments, in order to improve the image capturing efficiency of the sample display module 500, the calibration system 50 shown in fig. 4 may be used. Specifically, the correction coefficient 50 includes: a plurality of dark rooms 51a, 51b, 51c and 51d, a transfer device 53 and a computer system 55. The darkroom 51a comprises an image acquisition device 511a and a station 513a corresponding to the image acquisition device 511a and is used for providing a darkroom environment, the darkroom 51b comprises an image acquisition device 511b and a station 513b corresponding to the image acquisition device 511b and is used for providing a darkroom environment, the darkroom 51c comprises an image acquisition device 511c and a station 513c corresponding to the image acquisition device 511c and is used for providing a darkroom environment, and the darkroom 51d comprises an image acquisition device 511d and a station 513d corresponding to the image acquisition device 511d and is used for providing a darkroom environment. The computer system 55 includes, for example, one or more computers equipped with calibration software and display control software, and is electrically connected to the image capturing devices 511a to 511d, the stations 513a to 513d, and the transfer device 53. The conveying device 53 of the present embodiment is used for receiving the control of the computer system 55 to convey the sample display module 500 to the respective stations 513a to 513d in sequence and includes, for example, a conveying track; the stations 513 a-513 d are arranged at intervals along the conveying track, and are used for acquiring the screen printing images from the computer system 55 and sending the screen printing images to the sample display module 500 to display a plurality of correction images with different colors under the same gray scale in a blocking lighting mode. For example, if the sample display module 500 has inconsistent uniformity between the gray scales 0-10, 10-30, 30-100, and 100-255, the sample display module 500 may be controlled to sequentially display the red (R), green (G), and blue (B) images at the gray scale 8 at the workstation 513a in a blocking lighting manner, sequentially display the red, green, and blue images at the gray scale 16 at the workstation 513B in a blocking lighting manner, sequentially display the red, green, and blue images at the gray scale 64 at the workstation 513c in a blocking lighting manner, and sequentially display the red, green, and blue images at the gray scale 255 at the workstation 513d in a blocking lighting manner. It should be noted that the gray scale displayed by the partition lighting method at each of the workstations 513 a-513 d may be any gray scale in the corresponding gray scale interval.

In light of the above, the computer system 55, for example, controls the image collecting device 511a to collect the red image, the green image and the blue image of the gray scale 8 sequentially displayed by the sample display module 500 at the station 513a in the blocking lighting manner and to perform image processing on each collected image, such as the current mature region positioning and the current mature region positioning, to obtain three bright-chroma data (corresponding to one sample bright-chroma data) corresponding to the gray scale 8, controls the image collecting device 511b to collect the red image, the green image and the blue image of the gray scale 16 sequentially displayed by the sample display module 500 at the station 513a in the blocking lighting manner and to perform image processing on each collected image to obtain three bright-chroma data corresponding to the gray scale 16, and controls the image collecting device 511c to perform image processing on the red image, the green image, the blue image, the gray scale 64 sequentially displayed by the sample display module 500 at the station 513c in the blocking lighting manner, The green image and the blue image are collected, and the collected images are respectively subjected to image processing to obtain three parts of bright and chrominance data corresponding to the gray scale 64, and the image collection device 511d is controlled to collect the red image, the green image and the blue image under the gray scale 255 sequentially displayed by the sample display module 500 at the station 513d in a blocking lighting mode, and the collected images are respectively subjected to image processing to obtain three parts of bright and chrominance data corresponding to the gray scale 255.

In other embodiments, the sample display module 500 may be transferred between the stations by manual transportation, that is, the sample display module is not limited to the automatic transportation by the transportation device 53 in the foregoing embodiments.

[ second embodiment ]

Referring to fig. 5, 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 data calculation module 45, and a correction data generation module 47.

The display control module 41 is, for example, configured to control a plurality of cell blocks of a display module to be corrected to display a plurality of images for correction at a first gray scale in a blocking lighting manner, where each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images; the collecting control module 43 is, for example, configured to control an image collecting device to collect the plurality of images for correction in the first gray scale so as to obtain first color data of the display module to be corrected in the first gray scale; the data calculating module 45 is, for example, configured to calculate color data of the display module to be corrected at least one second gray scale according to the first color data and at least one color difference set to obtain at least one second color data, where the at least one second gray scale is different from the first gray scale; and the correction data generating module 47 is, for example, configured to generate multiple copies of correction data of the display module to be corrected at multiple different gray scales according to the first color data, the at least one second color data, and multiple set correction target values, so as to obtain multiple gray scale correction data corresponding to the display module to be corrected.

For the specific functional details of the display control module 41, the acquisition control module 43, the data calculation module 45, and the correction data generation module 47, reference may be made to the detailed description in the foregoing first embodiment, which is not repeated herein. It should be noted that the display control module 41, the acquisition control module 43, the data calculation module 45 and the correction data generation 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, each of the pixel points includes a plurality of primary color sub-pixels respectively corresponding to a plurality of different primary colors; the display control module 41 includes means for: controlling to light the specified position unit block of the plurality of unit blocks with the first gray scale to display a primary color image corresponding to a target primary color, but not controlling to light the plurality of peripheral position unit blocks of the plurality of unit blocks adjacent to the specified position unit block, to obtain one of the plurality of images for correction, wherein the target primary color is one of the plurality of different primary colors; and changing positions of the specified-position cell blocks to obtain changed specified-position cell blocks, and controlling lighting of the changed specified-position cell blocks of the plurality of cell blocks with the first gray scale to display a primary color image corresponding to the target primary color, but not controlling lighting of a plurality of peripheral position cell blocks adjacent to the changed specified-position cell blocks of the plurality of cell blocks to obtain another correction image of the plurality of correction images. In the embodiment, the multi-primary display module, for example, an RGB full-color LED display module, can be controlled to display the correction image in a partition lighting manner, so that the number of pixels collected at a single time is increased, and the number of times of image collection is reduced.

Optionally, as an embodiment of the present invention, each of the color difference sets in the at least one color difference set includes a plurality of color proportion groups respectively corresponding to the plurality of different primary colors; the data calculation module 45 comprises means for: and obtaining multiple color data respectively corresponding to the multiple different primary colors under the target gray scale according to multiple color data respectively corresponding to the multiple different primary colors in the first color data and the multiple color proportion groups in the color difference set corresponding to the target gray scale, wherein the multiple color data are used as one of the at least one second color data, and the target gray scale is one of the at least one second gray scale. The present embodiment represents the color difference set between different gray scales by a luminance ratio or a brightness ratio, for example, the brightness ratio is represented by the difference ratio of the XYZ three components of the XYZ color space, but the embodiment of the present invention is not limited to the XYZ color space, and may be other color spaces such as the Yxy color space.

Optionally, as an embodiment of the present invention, each of the color scale groups includes a plurality of color scale sub-groups respectively corresponding to the plurality of cell blocks, and each of the color scale sub-groups includes a plurality of scales. In this embodiment, each cell block has its own color scale sub-group, such as a luminance scale sub-group or a luminance scale sub-group, i.e., different cell blocks have their own different luminance or luminance scale sub-groups; of course, in other embodiments, all the cell blocks of the display module to be corrected may also share the same luminance or luminance and chrominance proportion set under the same primary color, and different primary colors correspond to different luminance or luminance and chrominance proportion sets.

Optionally, as an embodiment of the present invention, as shown in fig. 6, the display module correction apparatus further includes: a sample display control module 44a, for example, for controlling a plurality of cell blocks of each of a plurality of sample display modules to display a plurality of images for correction at N different gray scales in the blocking illumination manner, where N is a positive integer greater than 1, and the N different gray scales include the first gray scale and the at least one second gray scale; a sample collection control block 44b for controlling the image collection device to collect the plurality of images for correction at the N different gray scales displayed by the plurality of cell blocks of each of the sample display blocks in the blocking lighting manner, for example, to obtain a plurality of sample color data at the N different gray scales for each of the sample display blocks; and a gray scale difference obtaining module 44c, configured to obtain the at least one color difference set corresponding to the at least one second gray scale according to the sample color data of the sample display modules at the N different gray scales.

The gray-scale difference obtaining module 44c includes, for example, a sample mean value calculating submodule 44c1 and a gray-scale difference calculating submodule 44c 2. Specifically, the sample mean value calculating sub-module 44c1 is configured to, for example, calculate a mean value of a plurality of sample color data at each gray scale according to the plurality of sample display modules, so as to obtain N color data mean values corresponding to the N different gray scales, respectively, where the N color data mean values include a first color data mean value corresponding to the first gray scale and at least one second color data mean value corresponding to the at least one second gray scale; and the gray scale difference calculation sub-module 44c2 is configured to calculate a difference between the at least one second color data mean value and the first color data mean value based on the first color data mean value, for example, to obtain the at least one color difference set corresponding to the at least one second color data mean value in a one-to-one manner.

For the specific functional details of the sample display control module 44a, the sample collection control module 44b, and the gray-scale difference obtaining module 44c (for example, including the sample mean value calculating sub-module 44c1 and the gray-scale difference calculating sub-module 44c2), reference may be made to the detailed description in the foregoing first embodiment, which is not repeated herein. It should be noted that the sample display control module 44a, the sample collection control module 44b and the gray-scale difference obtaining module 44c may be software modules stored in a non-volatile memory and executed by a processor to perform the operations of steps S14a, S14b and S14c in the first embodiment. The present embodiment acquires images of a plurality of sample display modules to determine a color difference set, such as a brightness difference set or a brightness difference set, between N different gray levels for the data calculation module 45.

Optionally, as an embodiment of the present invention, each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; as shown in fig. 7A, the sample mean calculation submodule 44c1 includes: the cell-by-cell average calculation unit 441a is configured to calculate an average of color data in the plurality of sample color data at the same gray scale for each of the cell blocks located at the same position in the plurality of sample display modules. In this embodiment, the color data mean value per unit block, such as the luminance data mean value or the luminance data mean value, of the plurality of sample display modules at the same gray scale may be obtained, so that the unit blocks at different positions have different respective luminance or luminance data mean values, which may make the at least one second color data obtained by the data calculating module 45 more accurate.

Optionally, as an embodiment of the present invention, each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; as shown in fig. 7B, the sample mean calculation submodule 44c1 includes: a sample cell block average value calculating unit 441b, for example, a cell block color data average value of each of the sample color data of the plurality of sample display modules at the same gray level, to obtain a plurality of cell block color data average values; and a cell block averaging unit 443 for averaging the plurality of cell block color data averages to obtain one of the N color data averages corresponding to the same gray level, for example. In this embodiment, the overall luminance or luminance-chrominance mean value of each of the plurality of sample display modules at the same gray scale (i.e., the luminance data or luminance-chrominance data of all the unit blocks of the plurality of sample display modules at the same gray scale are summed and averaged) is first calculated as the luminance or luminance-chrominance data mean value of the unit block, and then the luminance or luminance-chrominance data mean values of the plurality of unit blocks corresponding to the plurality of sample display modules are averaged, so as to obtain one color data mean value (e.g., luminance data mean value or luminance-chrominance data mean value) corresponding to the same gray scale, which can improve the calculation efficiency of the subsequent data calculation module 45 for obtaining the at least one second color data.

Optionally, as an embodiment of the present invention, the sample collection control module 44a includes: and controlling a plurality of image acquisition devices to respectively acquire images of the plurality of sample display modules. The embodiment can improve the image acquisition efficiency of the plurality of sample display modules.

[ third embodiment ]

Referring to fig. 8, a display module calibration system 70 according to a third embodiment of the present invention includes: a processor 71 and a memory 73 electrically connected to the processor 71; the memory 73 stores instructions executable by the processor 71, and the instructions cause the processor 71 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.

[ fourth example ] A

Referring to fig. 9, a display screen calibration method according to a fourth embodiment of the present invention includes the steps of:

s91: controlling a plurality of cell blocks of each of a plurality of partitions of a target display screen to display a plurality of correction images at M different gray scales in a blocking lighting manner, wherein M is a positive integer greater than 1, each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images;

s93: controlling an image acquisition device to acquire the plurality of images for correction at the M different gray scales displayed by the plurality of unit blocks of each of the partitions in the blocking lighting manner to acquire a plurality of color data of each of the partitions at the M different gray scales;

s95: generating multiple correction data of the target display screen under the M different gray scales according to the multiple color data of each partition in the multiple partitions under the M different gray scales and multiple set correction target values so as to obtain multiple gray scale correction data corresponding to the target display screen; and

s97: and outputting the multi-gray-scale correction data to the target display screen for storage.

For the details of steps S91, S93, S95 and S97, reference may be made to the detailed description of the display control, the acquisition control, the generation of the multi-gray-scale correction data and the output of the multi-gray-scale correction data related to the to-be-corrected display module 300 in the first embodiment, which is not repeated herein.

Optionally, as an embodiment of the present invention, each of the pixel points includes a plurality of primary color sub-pixels respectively corresponding to a plurality of different primary colors; the step S91 includes, for example: controlling to light the specified position unit blocks in the plurality of unit blocks with a target gray scale to display a primary color image corresponding to a target primary color, but not controlling to light the plurality of peripheral position unit blocks adjacent to the specified position unit blocks in the plurality of unit blocks to obtain one of the plurality of images for correction, wherein the target gray scale is one of the M different gray scales, and the target primary color is one of the plurality of different primary colors; and changing positions of the specified-position cell blocks to obtain changed specified-position cell blocks, and controlling lighting of the changed specified-position cell blocks of the plurality of cell blocks with the target gradation to display a primary color image corresponding to the target primary color, but not controlling lighting of a plurality of peripheral-position cell blocks adjacent to the changed specified-position cell blocks of the plurality of cell blocks to obtain another correction image of the plurality of correction images. The embodiment can control the multi-primary color display screen, such as an RGB full-color LED display screen, to display the correction image in a partition lighting mode, so that the number of single-time-acquisition pixel points is increased, and the image acquisition times are reduced.

[ fifth embodiment ]

Referring to fig. 10, a display screen correction apparatus 100 according to a fifth embodiment of the present invention includes: a subarea display control module 101, a subarea acquisition control module 103, a correction data generating module 105 and a correction data output module 107.

The partition display control module 101 is configured to control a plurality of cell blocks of each of a plurality of partitions of a target display screen to display a plurality of correction images at M different gray scales in a partition lighting manner, where M is a positive integer greater than 1, each of the cell blocks includes a plurality of pixel points, and the partition lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images; the partition capture control module 103 is configured to control an image capture device to capture the plurality of correction images at the M different gray scales displayed by the plurality of cell blocks of each of the partitions in the blocking lighting manner, for example, to obtain a plurality of color data (e.g., luminance data or luminance data) at the N different gray scales for each of the plurality of partitions; the correction data generating module 105 is configured to generate multiple copies of correction data of the target display screen at the N different gray scales according to the multiple color data of each of the multiple partitions at the N different gray scales and multiple set correction target values, so as to obtain multiple gray scale correction data corresponding to the target display screen; and the correction data output module 107 is, for example, configured to output the multi-gray-scale correction data to the target display screen for storage.

For specific functional details of the partition display control module 101, the partition collection control module 103, the correction data generation module 105, and the correction data output module 107, reference may be made to the detailed description in the foregoing embodiments, and no further description is given here. It should be noted that the partition display control module 101, the partition collection control module 103, the correction data generation module 105 and the correction data output module 107 may be software modules stored in the non-volatile memory and executed by the processor to perform the operations of steps S91, S93, S95 and S97 in the first embodiment.

In another embodiment, the present invention further provides a display screen correction system, including: a processor and a memory electrically connected to the processor; wherein the memory stores instructions executable by the processor and the instructions, for example, cause the processor to perform operations to perform the display screen correction method of the fourth embodiment described above.

In yet another embodiment, the present invention further provides a computer readable storage medium which is a non-volatile memory and stores program code, which when executed by one or more processors, for example, causes the one or more processors to execute the display screen correction method according to the foregoing fourth embodiment.

It should be understood that the foregoing embodiments are merely exemplary of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structures, and not 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

1. A method for correcting a display module, comprising:

controlling a plurality of cell blocks of a display module to be corrected to display a plurality of correction images at a first gray scale in a blocking lighting manner, wherein each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images;

controlling an image acquisition device to acquire the plurality of images for correction under the first gray scale so as to obtain first color data of the display module to be corrected under the first gray scale;

calculating color data of the display module to be corrected under at least one second gray scale according to the first color data and at least one color difference set to obtain at least one second color data, wherein the at least one second gray scale is different from the first gray scale; and

generating multiple correction data of the display module to be corrected under multiple different gray scales according to the first color data, the at least one second color data and the set multiple correction target values to obtain multiple gray scale correction data corresponding to the display module to be corrected;

the at least one color difference set is obtained by image acquisition of a plurality of sample display modules.

2. The display module calibration method of claim 1, wherein each of said pixels comprises a plurality of primary color sub-pixels corresponding to a plurality of different primary colors, respectively; each color difference set in the at least one color difference set comprises a plurality of color proportion groups respectively corresponding to the plurality of different primary colors; the calculating color data of the display module to be corrected under at least one second gray scale according to the first color data and at least one color difference set to obtain at least one second color data includes:

and obtaining multiple color data respectively corresponding to the multiple different primary colors under the target gray scale according to multiple color data respectively corresponding to the multiple different primary colors in the first color data and the multiple color proportion groups in the color difference set corresponding to the target gray scale, wherein the multiple color data are used as one of the at least one second color data, and the target gray scale is one of the at least one second gray scale.

3. The method of claim 2, wherein each of the color scale groups comprises a plurality of color scale sub-groups respectively corresponding to the plurality of cell blocks, and each of the color scale sub-groups comprises a plurality of scales.

4. The display module correction method of claim 1, further comprising:

controlling a plurality of cell blocks of each of the plurality of sample display modules to display a plurality of images for correction at N different gray levels in the blocking illumination mode, wherein N is a positive integer greater than 1, and the N different gray levels include the first gray level and the at least one second gray level;

controlling an image acquisition device to acquire the plurality of images for correction at the N different gray scales displayed by the plurality of cell blocks of each of the sample display modules in the blocking lighting manner to acquire a plurality of sample color data of each of the sample display modules at the N different gray scales; and

and obtaining the at least one color difference set corresponding to the at least one second gray scale according to the sample color data of the sample display modules under the N different gray scales.

5. The method as claimed in claim 4, wherein said obtaining the at least one color difference set corresponding to the at least one second gray scale according to the sample color data of the sample display modules at the N different gray scales comprises:

calculating the mean value of a plurality of sample color data under each gray scale according to the plurality of sample display modules to obtain N color data mean values corresponding to the N different gray scales, wherein the N color data mean values comprise a first color data mean value corresponding to the first gray scale and at least one second color data mean value corresponding to the at least one second gray scale;

and calculating the difference of the at least one second color data mean value relative to the first color data mean value by taking the first color data mean value as a reference to obtain the at least one color difference set in one-to-one correspondence with the at least one second color data mean value.

6. The display module correction method of claim 5, wherein each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the calculating, according to the average values of the plurality of sample color data of the plurality of sample display modules at each gray scale, to obtain N average values of the color data corresponding to the N different gray scales, respectively, includes:

and calculating the average value of the color data in the plurality of sample color data of the unit blocks positioned at the same position in the plurality of sample display modules under the same gray scale.

7. The display module correction method of claim 5, wherein each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the calculating, according to the average values of the plurality of sample color data of the plurality of sample display modules at each gray scale, to obtain N average values of the color data corresponding to the N different gray scales, respectively, includes:

calculating a cell block color data mean value of each sample color data in a plurality of sample color data of the plurality of sample display modules under the same gray scale to obtain a plurality of cell block color data mean values;

averaging the color data averages of the plurality of unit blocks to obtain one of the color data averages corresponding to the same gray scale among the N color data averages.

8. The display module correction method according to claim 4 or 5, wherein the controlling the image pickup device to pick up the plurality of images for correction at the N different gray scales displayed in the block-by-block lighting manner by the plurality of unit blocks of each of the sample display modules to obtain the plurality of sample color data at the N different gray scales for each of the sample display modules includes:

and respectively carrying out image acquisition on the plurality of sample display modules by controlling a plurality of image acquisition devices.

9. A display module calibration apparatus, comprising:

a display control module for controlling a plurality of cell blocks of a display module to be corrected to display a plurality of images for correction in a first gray scale in a blocking lighting manner, wherein each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images;

the acquisition control module is used for controlling the image acquisition equipment to acquire the plurality of images for correction under the first gray scale so as to obtain first color data of the display module to be corrected under the first gray scale;

the data calculation module is used for calculating color data of the display module to be corrected under at least one second gray scale according to the first color data and at least one color difference set so as to obtain at least one second color data, wherein the at least one second gray scale is different from the first gray scale;

the correction data generation module is used for generating multiple copies of correction data of the display module to be corrected under multiple different gray scales according to the first color data, the at least one second color data and the set multiple correction target values so as to obtain multiple gray scale correction data corresponding to the display module to be corrected;

10. The display module correction apparatus of claim 9, wherein each of said pixels comprises a plurality of primary color sub-pixels corresponding to a plurality of different primary colors, respectively; each color difference set in the at least one color difference set comprises a plurality of color proportion groups respectively corresponding to the plurality of different primary colors; the data calculation module comprises:

11. The display module correction apparatus of claim 10, wherein each of the color scale groups comprises a plurality of color scale sub-groups respectively corresponding to the plurality of cell blocks, and each of the color scale sub-groups comprises a plurality of scales.

12. The display module calibration apparatus of claim 9, further comprising:

a sample display control module for controlling a plurality of cell blocks of each of the plurality of sample display modules to display a plurality of correction images at N different gray levels in the blocking illumination mode, wherein N is a positive integer greater than 1, and the N different gray levels include the first gray level and the at least one second gray level;

a sample collection control module configured to control an image collection device to collect the plurality of images for correction at the N different gray scales displayed by the plurality of cell blocks of each of the sample display modules in the blocking illumination manner, so as to obtain a plurality of sample color data of each of the sample display modules at the N different gray scales;

a gray scale difference obtaining module, configured to obtain the at least one color difference set corresponding to the at least one second gray scale according to the sample color data of the sample display modules under the N different gray scales.

13. The display module correction apparatus as claimed in claim 12, wherein the gray scale difference acquisition module comprises:

a sample mean value calculation sub-module, configured to calculate a mean value of a plurality of sample color data under each gray scale according to the plurality of sample display modules, so as to obtain N color data mean values corresponding to the N different gray scales, respectively, where the N color data mean values include a first color data mean value corresponding to the first gray scale and at least one second color data mean value corresponding to the at least one second gray scale;

and the gray scale difference calculation submodule is used for calculating the difference of the at least one second color data mean value relative to the first color data mean value by taking the first color data mean value as a reference so as to obtain the at least one color difference set which is in one-to-one correspondence with the at least one second color data mean value.

14. The display module correction apparatus of claim 13, wherein each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the sample mean calculation sub-module includes:

and the cell block-by-cell block average value calculating unit is used for calculating the average value of the color data in the sample color data of the cell blocks positioned at the same position in the sample display modules under the same gray scale.

15. The display module correction apparatus of claim 13, wherein each of the plurality of unit blocks of each of the sample display modules includes a plurality of pixel points; the sample mean calculation sub-module includes:

a sample cell block average value calculation unit configured to calculate a cell block color data average value of each of the plurality of sample color data of the plurality of sample display modules at the same gray scale to obtain a plurality of cell block color data average values;

and the cell block average averaging unit is used for averaging the color data averages of the plurality of cell blocks to obtain one color data average corresponding to the same gray scale in the N color data averages.

16. The display module calibration apparatus of claim 12 or 13, wherein the sample acquisition control module comprises means for:

and controlling a plurality of image acquisition devices to respectively acquire images of the plurality of sample display modules.

17. 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.

18. A display screen correction method is characterized by comprising the following steps:

controlling a plurality of cell blocks of each of a plurality of partitions of a target display screen to display a plurality of correction images at M different gray scales in a blocking lighting manner, wherein M is a positive integer greater than 1, each of the cell blocks includes a plurality of pixel points, and the blocking lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images;

controlling an image acquisition device to acquire the plurality of images for correction at the M different gray scales displayed by the plurality of unit blocks of each of the partitions in the blocking lighting manner to acquire a plurality of color data of each of the partitions at the M different gray scales;

generating multiple correction data of the target display screen under the M different gray scales according to the multiple color data of each partition in the multiple partitions under the M different gray scales and multiple set correction target values so as to obtain multiple gray scale correction data corresponding to the target display screen; and

outputting the multi-gray-scale correction data to the target display screen for storage;

wherein the generating of the plurality of correction data of the target display screen at the M different gray scales according to the plurality of color data of each of the plurality of partitions at the M different gray scales and the set plurality of correction target values comprises:

calculating at least one second color data at least one second gray scale for each of the plurality of sections of the target display screen based on the first color data and at least one color difference set at the first gray scale for each of the plurality of sections;

and generating multiple correction data of the target display screen under the M different gray scales according to the first color data, the at least one second color data and multiple correction target values, wherein the at least one color difference set is obtained by carrying out image acquisition on multiple sample display modules.

19. A display screen correction apparatus, comprising:

a partition display control module for controlling a plurality of cell blocks of each of a plurality of partitions of a target display screen to display a plurality of correction images at M different gray levels in a partition lighting manner, wherein M is a positive integer greater than 1, each of the cell blocks includes a plurality of pixel points, and the partition lighting manner includes: controlling lighting of a specified position unit block of the plurality of unit blocks but not controlling lighting of a plurality of peripheral position unit blocks adjacent to the specified position unit block of the plurality of unit blocks, for any one of the plurality of correction images;

a partition acquisition control module configured to control an image acquisition device to acquire the plurality of correction images at the M different gray scales displayed by the plurality of cell blocks of each of the partitions in the partition lighting manner, so as to acquire a plurality of color data of each of the plurality of partitions at the M different gray scales;

a correction data generating module, configured to generate multiple sets of correction data of the target display screen at the M different gray scales according to the multiple color data of each of the multiple partitions at the M different gray scales and multiple set correction target values, so as to obtain multiple gray scale correction data corresponding to the target display screen; and

the correction data output module is used for outputting the multi-gray-scale correction data to the target display screen for storage;