CN113419909A - Display uniformity detection method and computer equipment - Google Patents
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Abstract
The invention relates to the technical field of display module detection, and discloses a display uniformity detection method, which comprises the steps of obtaining display images when a display module displays a plurality of different pictures at a plurality of different angles; acquiring pixel data at a plurality of preset pixel points according to the display image; respectively calculating the display data of each angle of each picture according to the pixel data; and judging the display uniformity of the display module according to the error between the display data and the display uniformity standard value. The pixel data of a plurality of preset pixel points are obtained from a plurality of different angles when the display module displays different test pictures. And respectively calculating the display data of each angle of each picture according to the pixel data, and judging the display uniformity of the display module according to the error between the display data and the display uniformity standard value. The display module is tested by using the display uniformity testing method, so that the accuracy and flexibility of the tested chromaticity uniformity can be effectively improved, and the error of the testing device caused by angle difference is reduced.
Description
Technical Field
The invention relates to the technical field of display module detection, in particular to a display uniformity detection method and computer equipment.
Background
The testing device is easy to cause corresponding errors due to the existence of various influencing factors. At present to display module's the measuring device of demonstration homogeneity, complicated and unstable, uncertain high-precision display module's under some test environment condition, can not reach the precision that needs.
Disclosure of Invention
Therefore, it is necessary to provide a display uniformity detection method and a computer device for solving the problem that the current test device cannot achieve the required precision under the conditions of a display module with complicated, unstable and uncertain high precision test environments.
A display uniformity detection method comprises the steps of obtaining display images when a display module displays a plurality of different pictures at a plurality of different angles; acquiring pixel data at a plurality of preset pixel points according to the display image; respectively calculating the display data of each angle of each picture according to the pixel data; and judging the display uniformity of the display module according to the error between the display data and the display uniformity standard value.
According to the display uniformity detection method, the display module is enabled to switch a plurality of different test pictures, the pixel data of a plurality of preset pixel points are obtained from a plurality of different angles, and the positions of the preset test points can change along with the change of the positions of products. And respectively calculating the display data of each angle of each picture according to the pixel data, wherein each preset pixel point of each angle of each picture has a corresponding display uniformity standard value. And comparing the display data of each preset pixel point obtained in the test with the display uniformity standard value corresponding to each preset pixel point, and judging the display uniformity of the display module according to the error between the display data and the display uniformity standard value. When the display uniformity testing method provided by the invention is applied to the display uniformity testing device of the display module, the chromaticity uniformity precision and flexibility of the testing device can be effectively improved, and the error of the testing device caused by angle difference is reduced.
In one embodiment, before the display uniformity of the display module is determined according to the error between the display data and the display uniformity standard value, the method further includes obtaining the display uniformity standard value of each preset pixel point obtained through a pre-test when the plurality of different images are displayed at the plurality of different angles.
In one embodiment, the display uniformity standard value comprises a color temperature standard value, and the display data comprises color temperature data.
In one embodiment, the pixel data includes pixel coordinates of the preset pixel points, and the calculating the display data of each angle of each picture according to the pixel data includes obtaining color coordinates of the preset pixel points according to the pixel coordinates of the preset pixel points; and calculating the color temperature value of each preset pixel point based on the CIE1931 color space according to the color coordinate of each preset pixel point under each angle and each picture, and acquiring the color temperature data.
In one embodiment, the display uniformity criterion value further comprises a uniform color space color difference value, and the display data further comprises color difference data.
In one embodiment, the pixel data includes pixel coordinates of the preset pixel points, and the calculating the display data of each angle of each picture according to the pixel data includes obtaining color coordinates of the preset pixel points according to the pixel coordinates of the preset pixel points; calculating the color value of each preset pixel point based on CIE1976 chromaticity space according to each angle and the color coordinate of each preset pixel point under each picture; and calculating the difference of the color values between the adjacent preset pixel points in each display image to obtain the color difference data.
In one embodiment, the determining the display uniformity of the display module according to the error between the display data and the standard value of display uniformity includes determining that the display uniformity of the display module meets a detection standard if the error between the color temperature data and the standard value of color temperature is within a first error range and the error between the color difference data and the difference value of uniform color space color is within a second error range.
In one embodiment, before acquiring pixel data at a plurality of preset pixel points according to the display image, the method further comprises performing picture correction on the display image through an internal algorithm.
In one embodiment, the displaying the image includes displaying an image of at least one gray scale in at least one color by the display module.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the display uniformity detection method described in any of the above embodiments when the processor executes the computer program.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the specification, and other drawings can be obtained by those skilled in the art without inventive labor.
FIG. 1 is a flowchart illustrating a method of displaying a uniformity detection method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for calculating display data for each angle of each frame according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for calculating display data for each angle of each frame according to another embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "upper," "lower," "front," "rear," "circumferential," and the like are based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Display module's display state such as luminance, color all can change along with the change of visual angle usually, and traditional testing arrangement only tests single angle, can't judge whether the product all accords with test standard at the different display effect of different visual angles down to the defect of unable omnidirectional judgement display module. When the display module assembly is applied to scenes such as on-vehicle screen, the user can deflect a certain angle to watch the display module assembly usually to a certain extent when using, can't watch from the dead ahead of the display module assembly. Under the application scene or under the condition of a high-precision display module with complex, unstable and uncertain application environment, if only the influence of the working distance on the display uniformity test of the display module is considered and the test angle is ignored, the required test precision cannot be achieved.
Fig. 1 is a flowchart illustrating a method of a display uniformity detection method according to an embodiment of the present invention, wherein the display uniformity detection method includes the following steps S100 to S400.
Step S100: and acquiring display images of the display module when the display module displays a plurality of different pictures at a plurality of different angles.
And controlling the display module to display a certain picture, and acquiring display images of the display module when the display module displays the picture from a plurality of different angles. The display module is controlled to switch the pictures, and display images of the display module are obtained from a plurality of different angles to obtain the display images of the display module when the display module displays a plurality of different pictures at a plurality of different angles.
In the present embodiment, the lighting inspection machine is used to detect and control the screen of the display module. The lighting inspection machine is controlled to switch a plurality of different pictures respectively, and the number of the switched pictures can be set according to specific detection conditions. When the lighting inspection machine is used for detecting the picture of the display module, the picture can be added and switched at will.
In this embodiment, a multi-angle spectrometer is used to obtain the display image of the display module. The front end of the multi-angle spectrometer is connected with a plurality of cameras. The plurality of cameras are respectively arranged on a plurality of positions corresponding to different angles of the display module, and the shooting angles of the cameras relative to the display module are different. When the display module assembly shows each picture, control many cameras and shoot display module assembly simultaneously or successively to acquire the display image of display module assembly when showing different pictures under a plurality of different angles.
In one embodiment, a rotating mechanism may be further disposed at the front end of the multi-angle spectrometer, and the camera is mounted on the rotating mechanism. When the display module displays different pictures, the camera is driven to rotate by the rotating mechanism, so that the shooting angle is changed to obtain display images with different angles and different pictures.
Step S200: and acquiring pixel data at a plurality of preset pixel points according to the display image.
The multi-angle spectrometer outputs pixel data of each display image after acquiring the display image of the display module displaying a plurality of different images at a plurality of different angles. In this embodiment, each display data includes a plurality of pre-determined pixels at different pre-selected positions as test points. Since the display image is composed of a plurality of pixel points, the pixel data of each display image can be regarded as a set of pixel data of the pixel points composing the display image. And acquiring corresponding pixel data at each preset pixel point according to the pixel data of each display image acquired in the test. The number and the positions of the preset pixel points can be set arbitrarily according to the detection requirement.
Step S300: and respectively calculating the display data of each angle of each picture according to the pixel data.
And calculating the display data of the preset pixel points in each angle of each picture in different color spaces according to the pixel data of each preset pixel point in each display image, so that the display uniformity of the preset pixel points can be evaluated from different angles. For example, by converting the pixel data into data in the CIE1931 xy color space and/or the CIE1976 uv color space, the display uniformity of the display module can be evaluated in terms of color and/or chromaticity.
Step S400: and judging the display uniformity of the display module according to the error between the display data and the display uniformity standard value.
Comparing the display data of each preset pixel point obtained in the step S300 with the standard value corresponding to each preset pixel point, and if the error between the display data and the standard value is within the acceptable error range, judging that the display uniformity of the display module is qualified; and if the error between the display data and the standard value is overlarge, judging that the display uniformity of the display module is unqualified.
According to the display uniformity detection method, the display module is controlled to switch a plurality of different test pictures, pixel data of a plurality of preset pixel points under a plurality of different angles are obtained, and the positions of the preset test points can change along with the change of the positions of products. And calculating display data of each preset pixel point at different pictures and different angles according to the pixel data of the preset pixel point, and comparing the display data with the standard value of the display uniformity to judge the display uniformity of the display module.
The display module has differences in chromaticity display at different angles and different pictures, and a product cannot be judged only by test data of a group of pictures at a group of angles, so that the problem of missed detection is easily caused. In order to judge the quality of the product in an all-round manner, different display effects of the product need to be acquired at different viewing angles, and whether the various display effects meet the standard or not is judged. According to the method, the display module is controlled through multi-angle and multi-standard parameters, so that the measurement precision is effectively improved, and the uniformity of the brightness and the chromaticity of the product can be more accurately reflected. When the display uniformity testing method provided by the embodiment is applied to the display uniformity testing device of the display module, the detection precision and flexibility of the uniformity of the brightness and the chromaticity of the light-emitting surface of the display module can be effectively improved, and the error of the testing device caused by angle difference is reduced.
In one embodiment, before the display uniformity of the display module is determined according to the error between the display data and the display uniformity standard value, the method further includes obtaining the display uniformity standard value obtained by the preliminary test when each preset pixel point displays a plurality of different pictures at a plurality of different angles.
In this embodiment, before the display uniformity of the display module is detected, the display module with the standard display uniformity can be tested in advance according to the test requirement to obtain the standard value of the display uniformity.
For example, in the display uniformity test for the display module at this time, the test requirement is that the display uniformity of the display module is judged from three different angles of 10 °, 40 °, and 60 ° when the display module is to be tested to switch three different monochrome images of red, yellow, and blue, and the display uniformity is judged according to the display data of 200 preset pixel points in each display image in the test. Then, in the preliminary experiment, the standard display module can be controlled to correspondingly switch the three different monochromatic pictures of red, yellow and blue, and when the standard display module displays each monochromatic picture, the standard display image is acquired from three different angles of 10 degrees, 40 degrees and 60 degrees respectively. And acquiring standard display data at 200 standard preset pixel points which are preset as test point positions in each standard display image, and taking the standard display data at the 200 standard preset pixel points in each standard display image as a display uniformity standard value. In the subsequent detection process, the standard value of the display uniformity obtained in the preliminary test can be set as the judgment standard of the display module to be detected.
In one embodiment, the display uniformity criterion value comprises a color temperature criterion value, and the display data comprises color temperature data. In this embodiment, a color temperature standard value based on each preset pixel point in each picture at each angle of CIE1931 (color temperature) obtained in advance through experiments is obtained, and is set as a determination standard. When the display uniformity of the display module to be tested is detected, the color temperature data of the display module to be tested based on CIE1931 (color temperature) is obtained, the color temperature data obtained by testing is compared with the color temperature standard value in the display uniformity standard value, and the display uniformity of the display module to be tested is evaluated according to the comparison result.
Fig. 2 is a flowchart illustrating a method for calculating display data of each angle of each image according to an embodiment of the present invention, in which in one embodiment, pixel data includes pixel coordinates of a preset pixel point, and calculating the display data of each angle of each image according to the pixel data includes the following steps S310 to S320.
Step S310: and acquiring the color coordinates of the preset pixel points according to the pixel coordinates of the preset pixel points.
Each image is composed of pixel points of a plurality of small squares, the small squares have a definite position coordinate and a corresponding color numerical value, and the position and the color numerical value of all the small squares determine the appearance of the image. Therefore, in this embodiment, according to the preset pixel coordinates of the preset pixel points serving as the test points, the preset pixel points at the corresponding positions can be located in the display images of each picture and each angle, and the color coordinate data of each preset pixel point in each display image can be correspondingly obtained. The display data of the preset pixel points in different color spaces can be obtained according to the color coordinates of the preset pixel points, and then the display uniformity of the preset pixel points can be evaluated from different angles. Quality control detection is carried out by utilizing multi-angle and multi-standard judging parameters to improve the measurement precision, so that the product chromaticity uniformity is reflected more accurately.
Step S320: and calculating the color temperature value of each preset pixel point based on the CIE1931 color temperature space according to the color coordinates of each angle and each preset pixel point under each picture, and acquiring color temperature data.
Each preset pixel point on each display image corresponds to a group of color coordinates (cie-x, cie-y), namely tristimulus values. In this embodiment, the point at the upper left corner of each display image is taken as the origin, and the color coordinates of each preset pixel point are represented by (x, y). And calculating the color temperature value of each preset pixel point based on CIE1931 color temperature space at any angle and under each picture according to each angle and the color coordinate of each preset pixel point under each picture, wherein the color temperature data is formed by the collection of the color temperature values corresponding to each preset pixel point.
Specifically, the Color temperature value cct (correlated Color temperature) is calculated according to the following expression:
CCT＝-437×n3+3601×n2-6831×n+5517；
wherein n is (x-0.3320)/(y-0.1858);
in the formula, x and y are color coordinates cie-x and cie-y of each preset pixel point obtained by testing.
In one embodiment, the display uniformity criterion value further comprises a uniform color space color difference value, and the display data further comprises color difference data. In this embodiment, a uniform color space color difference value between each preset pixel point in each picture based on each angle of CIE1976 (chromaticity) obtained in advance through experiments is obtained and set as a criterion of color difference data. When the display uniformity of the display module to be tested is detected, the color difference data of the display module to be tested based on CIE1976 (chromaticity) is obtained, the color difference data obtained by testing is compared with the uniform color space color difference value in the display uniformity standard value, and the display uniformity of the display module to be tested is evaluated according to the comparison result.
Fig. 3 is a flowchart illustrating a method for calculating display data for each angle of each frame according to another embodiment of the present invention, wherein in one embodiment, the step of calculating the display data for each angle of each frame according to pixel data includes the following steps S330 to S350.
Step S330: and acquiring the color coordinates of the preset pixel points according to the pixel coordinates of the preset pixel points.
And similarly, according to the preset pixel coordinates of the preset pixel points serving as the test point positions, the preset pixel points at the corresponding positions are positioned in the display images of all the pictures and all the angles, and the color coordinate data of all the preset pixel points in all the display images are obtained. In the present embodiment, the color coordinate data acquired in step S310 may be directly used.
Step S340: and calculating the color value of each preset pixel point based on CIE1976 chromaticity space according to each angle and the color coordinate of each preset pixel point under each picture.
Each preset pixel point on each display image corresponds to a group of color coordinates (cie-x, cie-y), namely tristimulus values. In this embodiment, the point at the upper left corner of each display image is taken as the origin, and the color coordinates of each preset pixel point are represented by (x, y). According to the angles and the color coordinates of each preset pixel point under each picture, CIE-u '& v' (u and v are the color values of each preset pixel point) of each preset pixel point based on CIE1976 chromaticity space can be calculated.
Specifically, the color value is calculated according to the following expression:
u'＝4x/(-2x+12y+3)；
v'＝9y/(-2x+12y+3)；
wherein x and y are the color coordinates cie-x and cie-y of each point obtained by the test.
Step S350: and calculating the uniform color space chromaticity difference between adjacent preset pixel points based on the CIE1976 chromaticity space to obtain color difference data.
Calculating the color value difference between the adjacent preset pixel points based on CIE1976 chromaticity space, namely the uniform color space color difference delta, on the display image of each angle and each picture according to the color value of each preset pixel point calculated in the step S340Angle Pictureu 'v'. Wherein Angle is an Angle and Picture is a Picture. For example, when this time it is shown that the test angle set in the uniformity measurement is 15 °, 30 °60 degrees and 90 degrees, and when pictures are W255, W128, W64, G64 and G32, the color difference of the uniform color space is deltaAngle Pictureu 'v' includes Δ15° W255u’v’、Δ60° W128u 'v', and the like. The set of uniform color space color differences forms color difference data.
Specifically, the color value is calculated according to the following expression:
and i and j are positive integers, and values are taken according to the number of preset pixel points. For example, when the number of preset pixels is 105, i & j ∈ (1, 105).
In one embodiment, the determining the display uniformity of the display module according to the error between the display data and the standard value of the display uniformity includes determining that the display uniformity of the display module meets the detection standard if the error between the color temperature data and the standard value of the color temperature is within a first error range and the error between the color difference data and the color difference value of the uniform color space is within a second error range.
In this embodiment, the color temperature data obtained by the calculation in step S320 is compared with the color temperature standard value of each preset pixel point in each picture based on each angle of CIE1931 (color temperature) acquired in a preset experiment, and an error with the set color temperature standard value is determined, and if the error value is within a first error range, it indicates that the color temperature detection of the display module is qualified; otherwise, judging that the color temperature of the display module is unqualified.
Comparing the color difference data obtained by the calculation in the step S350 with a uniform color space color difference value between each preset pixel point in each picture based on each angle of CIE1976 (chromaticity) obtained in a preset experiment, judging an error between the color difference data and a set color temperature standard value, and if the error value is within a second error range, indicating that the color difference detection of the display module is qualified; otherwise, judging that the color difference detection of the display module is unqualified.
Only when the color temperature detection and the color difference detection of the display module to be detected are qualified, judging that the display uniformity of the display module meets the detection standard; otherwise, any one of the color temperature data and the color difference data is detected when the data does not meet the detection standard, and the other data does not need to be calculated and judged.
In other embodiments, data of other color spaces can be obtained according to the pixel coordinates and color coordinate conversion of the preset pixel points, and the display uniformity of the display module can be judged from various judgment angles. For example, the display parameters such as brightness, contrast, resolution, color gamut and the like can be managed and controlled, and the uniformity of the product chromaticity can be reflected more accurately.
It should be understood that although the various steps in the flowcharts of fig. 1-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-3 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps or stages.
In one embodiment, before acquiring pixel data at a plurality of preset pixel points according to the display image, the method further comprises performing picture correction on the display image through an internal algorithm. And (4) capturing the characteristic profile of the display image of each picture at each angle, and performing template matching with the standard display image obtained and set in the experiment in advance. And acquiring the angle deviation between the current display image and the standard display image, and moving the display image acquired by shooting in the test to a calibration reference position.
Meanwhile, the shot display image is rotated to a calibrated reference angle, so that the shot display image in the test is consistent with the standard display image obtained in the experiment in advance. Before the data obtained by testing is processed and calculated, the displayed image is corrected by using a set internal algorithm, the position of a preset pixel point on each testing point in the testing is ensured to correspond to the position of a standard preset pixel point, the data comparison is more accurate, and the chromaticity uniformity detection precision of the testing device is improved.
In one embodiment, displaying the image includes the display module displaying at least one gray-scale image in at least one color. In this embodiment, the display module is controlled to switch the frames W255/W128/W64/G64/G32(W represents white, G represents gray, and 255, 128, and 64 represent gray levels), respectively, to obtain the display images of the display module when displaying 5 different frames, where the obtained display images are the images of the display module when displaying three different gray levels when displaying white, and the images of the display module when displaying two different gray levels when displaying gray.
In practical application, the color, gray scale and number of switched frames of the display frame of the display module can be set according to specific test requirements. When the measuring device adopts a plurality of test pictures to detect the display module, the test pictures can be added and switched at will. Compared with the traditional test method with a single fixed test picture.
Meanwhile, in this embodiment, the display images of the display module when each screen is displayed are obtained from 4 different angles. The front end of the multi-angle spectrometer is connected with four cameras, the installation angles of the four cameras are respectively 15 degrees, 30 degrees, 60 degrees and 90 degrees, and the four groups of cameras photograph the display module group displaying different pictures from four different angles. The number and angles of the cameras can be set according to specific test requirements. The measuring device shoots the display module group from a plurality of test angles and obtains the display image, and the shooting angle accessible sets up rotary mechanism and adjusts at will. Unlike the conventional test method which omits the angle test, the method judges the product not only by the test data of a group of images of a group of angles. According to the test method, the test point positions change along with the change of the product positions, the camera acquires display images from different distances and different angles, the condition of missed detection is not easy to cause, the display quality of the display module is controlled through multi-angle and multi-standard test parameters, the measurement precision is improved, and the product chromaticity uniformity can be accurately reflected.
In this embodiment, the method further adopts a multi-point bit test to obtain pixel data at least 105 preset pixel points. In an actual test, the appropriate number of pixel points can be determined according to the detection requirement, and the color coordinate of each pixel point is represented by (x, y). When the lighting inspection machine is controlled to respectively switch pictures W255/W128/W64/G64/G32, the multi-angle spectrometer shoots display images by using four cameras with installation angles of 15 degrees, 30 degrees, 60 degrees and 90 degrees respectively, and data of 105 preset pixel points on each display image are acquired, wherein the acquired data comprise W255/W128/W64/G64/G3215 1-105，W25530 1-105，W25560 1-105，W25590 1-105，W12815 1-105，W12830 1-105，W12860 1-105，W128901-105，W6415 1-105，W6430 1-105，W6460 1-105，W6490 1-105，G6415 1-105，G6430 1-105，G6460 1-105，G6490 1-105，G3215 1-105，G3230 1-105，G3260 1-105，G3290 1-105。
Compared with the traditional test method which generally adopts 35-point test at present, the test method has the advantages that the multi-angle multi-picture test method is adopted, the 105-point test method is adopted, the measurement precision is higher, the missing detection is not easy to cause during actual measurement, and the test flexibility is improved.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the display uniformity detection method described in any of the above embodiments when the processor executes the computer program.
A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the display uniformity detection method described in any one of the above embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A display uniformity detection method is characterized by comprising the following steps:
acquiring display images of a display module when the display module displays a plurality of different pictures at a plurality of different angles;
acquiring pixel data at a plurality of preset pixel points according to the display image;
respectively calculating the display data of each angle of each picture according to the pixel data;
and judging the display uniformity of the display module according to the error between the display data and the display uniformity standard value.
2. The method according to claim 1, wherein before determining the display uniformity of the display module according to the error between the display data and the standard value of display uniformity, the method further comprises:
and acquiring the display uniformity standard value of each preset pixel point obtained by pre-testing when the preset pixel points display the different pictures at the different angles.
3. The method according to claim 2, wherein the display uniformity standard value comprises a color temperature standard value, and the display data comprises color temperature data.
4. The method according to claim 3, wherein the pixel data includes pixel coordinates of the predetermined pixel points, and the calculating the display data for each angle of each frame according to the pixel data includes:
acquiring the color coordinates of the preset pixel points according to the pixel coordinates of the preset pixel points;
and calculating the color temperature value of each preset pixel point based on the CIE1931 color space according to the color coordinate of each preset pixel point under each angle and each picture, and acquiring the color temperature data.
5. The display uniformity detection method of claim 3, wherein the display uniformity criterion value further comprises a uniform color space color difference value, and the display data further comprises color difference data.
6. The method according to claim 5, wherein the pixel data includes pixel coordinates of the predetermined pixel points, and the calculating the display data for each angle of each frame according to the pixel data includes:
acquiring the color coordinates of the preset pixel points according to the pixel coordinates of the preset pixel points;
calculating the color value of each preset pixel point based on CIE1976 chromaticity space according to each angle and the color coordinate of each preset pixel point under each picture;
and calculating the difference of the color values between the adjacent preset pixel points in each display image to obtain the color difference data.
7. The method according to claim 5, wherein the determining the display uniformity of the display module according to the error between the display data and the display uniformity standard value comprises:
and if the error between the color temperature data and the color temperature standard value is within a first error range and the error between the color difference data and the uniform color spatial color difference value is within a second error range, judging that the display uniformity of the display module meets the detection standard.
8. The display uniformity detection method according to claim 1, before acquiring pixel data at a plurality of preset pixel points from the display image, the method further comprising:
and carrying out picture correction on the display image through an internal algorithm.
9. The display uniformity detection method of claim 1, wherein the display image comprises:
the display module displays at least one gray-scale image under at least one color.
10. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program implements the steps of the display uniformity detection method of any one of claims 1 to 9.
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