CN117351859B - Detection method, device and system for display module - Google Patents
Detection method, device and system for display module Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 131
- 238000005096 rolling process Methods 0.000 claims abstract description 63
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- 238000000034 method Methods 0.000 claims abstract description 27
- 238000012216 screening Methods 0.000 claims abstract description 19
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- 230000007547 defect Effects 0.000 claims description 27
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
Abstract
The invention relates to the field of computers, in particular to a detection method, a detection device and a detection system for a display module, wherein the method comprises the steps of firstly dividing a display area into a plurality of subareas, selecting one subarea as a test subarea, further distinguishing reflective pixels and non-reflective pixels of the test subarea, and then screening out potential defective pixels of the non-reflective pixels and the reflective pixels; then, the display module is controlled to roll and display rolling color bars of non-solid colors, and for pixels in each color bar area, the current difference value of the pixel color value and the second average color value is compared with the color value deviation obtained before to determine whether components of the two deviations are in proportion or not, so that unqualified pixels can be screened and marked; the method solves the problem that the detection is affected by the reflection of the camera lens, and can screen out unqualified pixels no matter aiming at the pixels which reflect light or pixels which do not reflect light, thereby remarkably improving the accuracy of the test.
Description
Technical Field
The present invention relates to the field of computers, and in particular, to a method, an apparatus, and a system for detecting a display module.
Background
The display module is formed by overlapping a plurality of layers of structures, and the display effect of the display module is required to be detected after the finished product is produced, so that the display defect of the display module can be found in advance.
In the production process, a mode of image acquisition is generally adopted, a display module is firstly lightened to display a specific pattern, then the image of the display module is acquired, whether a defect point exists or not can be found out by analyzing the difference between the image and a standard image, and whether the display module is qualified or not is judged. One problem to be solved in this process is that, in order to minimize the disturbance of the acquired image, the other disturbing light sources are turned off so that the camera is positioned directly above the display module, but the illuminated display module as a light source illuminates the relevant devices of the camera, which in turn project light shadows on the surface of the display module, which affect the accuracy of the subsequent image comparison and recognition.
Therefore, the existing detection method for the display module has the problem of low detection accuracy.
Disclosure of Invention
Accordingly, it is desirable to provide a method, apparatus and system for detecting a display module.
The embodiment of the invention is realized in such a way that the detection method for the display module comprises the following steps:
S1: dividing a display area of a display module into a plurality of partitions, and taking one partition as a test partition;
s2: controlling the test subarea to display color light with set colors, moving the camera to be right above the center of the test subarea, collecting a first image and identifying color values of all pixels in the first image;
s3: taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels, and the rest pixels are reflective pixels;
s4: changing the display color light of the test subarea, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, screening out potential defective pixels according to the color value differences, wherein the rest of non-reflective pixels are rest non-reflective pixels, and the rest of reflective pixels are rest of reflective pixels;
s5: controlling the test subarea to display rolling color bars, collecting a third image, identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area;
s6: calculating a second average color value of each remaining non-reflective pixel in the test color bar area;
s7: respectively calculating the current difference values of the color values and the second average color values of each residual reflective pixel and the potential defect pixel, determining unqualified pixels in each residual reflective pixel and the potential defect pixel according to each current difference value and the corresponding color value difference value, and marking and outputting;
S8: taking the other color bar area as a test color bar area, and executing the steps S6 to S8 until each color bar area of the test partition is detected;
s9: taking the other partition as a test partition, and executing the steps S2 to S8 until each partition of the display module is detected.
In one embodiment, the invention provides a detection device for a display module, wherein each module in the detection device for the display module is used for executing the steps of a detection method for the display module; the detection device for the display module comprises:
the first processing module is used for dividing the display area of the display module into a plurality of partitions, and taking one partition as a test partition;
the second processing module is used for controlling the test partition to display the color light with the set color, moving the camera to the position right above the center of the test partition, collecting the first image and identifying the color value of each pixel in the first image;
the third processing module is used for taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels and the rest pixels as reflective pixels;
the fourth processing module is used for converting the display color light of the test subarea, collecting a second image and calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, screening out potential defective pixels according to the color value differences, wherein the rest of non-reflective pixels are rest non-reflective pixels, and the rest of reflective pixels are rest reflective pixels;
The fifth processing module is used for controlling the test subarea to display the rolling color bars, collecting a third image and identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area;
a sixth processing module for calculating a second average color value of each remaining non-reflective pixel in the test color bar area;
the seventh processing module is used for respectively calculating the current difference values of the color values of the residual reflective pixels and the potential defect pixels and the second average color value, determining unqualified pixels in the residual reflective pixels and the potential defect pixels according to the current difference values and the corresponding color value difference values, and marking and outputting the unqualified pixels;
an eighth processing module, configured to take another color bar area as a test color bar area, and execute steps S6 to S8 until each color bar area of the test partition is detected;
and the ninth processing module is used for taking the other partition as a test partition, and executing the steps S2 to S8 until each partition of the display module is detected.
In one embodiment, the present invention provides a detection system for a display module, the detection system for a display module is used for detecting a display module, and the detection system for a display module includes:
The movable camera is used for collecting images when the display module operates;
and the computer equipment is connected with the movable camera and the display module and is used for executing the detection method for the display module.
The invention provides a detection method, a device and a system for a display module, wherein the method comprises the steps of dividing a display area of the display module into a plurality of subareas, and taking one subarea as a test subarea; controlling the test subarea to display color light with set colors, moving the camera to be right above the center of the test subarea, collecting a first image and identifying color values of all pixels in the first image; taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels, and the rest pixels are reflective pixels; converting the display color light of the test subarea, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, and screening out potential defect pixels according to the color value differences; controlling the test subarea to display rolling color bars, collecting a third image, identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area; calculating a second average color value of each remaining non-reflective pixel in the test color bar area; respectively calculating the current difference values of the color values and the second average color values of each residual reflective pixel and the potential defect pixel, determining unqualified pixels in each residual reflective pixel and the potential defect pixel according to each current difference value and the corresponding color value difference value, and marking and outputting; repeating the steps until each color bar area of the test partition is detected; taking another partition as a test partition, and repeating the steps until each partition of the display module is detected; according to the method, whether the display of the pixels is normal or not is determined by comparing the color value deviation of the pixels under the condition that different types of color light are displayed, the problem that the detection is affected due to the reflection of the camera lens is solved, whether the pixels are reflective or non-reflective, the unqualified pixels can be screened out, and the accuracy of the test is remarkably improved.
Drawings
FIG. 1 is a first flowchart of a detection method for a display module according to one embodiment;
FIG. 2 is a second flowchart of a detection method for a display module according to one embodiment;
FIG. 3 is a first schematic diagram of a display area of a detection method for a display module according to an embodiment;
FIG. 4 is a second schematic diagram of a display area of a detection method for a display module according to an embodiment;
FIG. 5 is a third schematic diagram of a display area of a detection method for a display module according to an embodiment;
FIG. 6 is a block diagram of an injection molding operation data management analysis device in one embodiment;
FIG. 7 is a block diagram of an injection molding operation data management analysis system in one embodiment;
FIG. 8 is a block diagram of the internal architecture of a computer device in one embodiment.
Description of the embodiments
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms unless otherwise specified. These terms are only used to distinguish one element from another element. For example, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script, without departing from the scope of this disclosure.
As shown in fig. 1-2, in one embodiment, a method for detecting a display module is provided, where the method includes:
s1: dividing a display area of a display module into a plurality of partitions, and taking one partition as a test partition;
s2: controlling the test subarea to display color light with set colors, moving the camera to be right above the center of the test subarea, collecting a first image and identifying color values of all pixels in the first image;
s3: taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels, and the rest pixels are reflective pixels;
s4: changing the display color light of the test subarea, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, screening out potential defective pixels according to the color value differences, wherein the rest of non-reflective pixels are rest non-reflective pixels, and the rest of reflective pixels are rest of reflective pixels;
s5: controlling the test subarea to display rolling color bars, collecting a third image, identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area;
s6: calculating a second average color value of each remaining non-reflective pixel in the test color bar area;
S7: respectively calculating the current difference values of the color values and the second average color values of each residual reflective pixel and the potential defect pixel, determining unqualified pixels in each residual reflective pixel and the potential defect pixel according to each current difference value and the corresponding color value difference value, and marking and outputting;
s8: taking the other color bar area as a test color bar area, and executing the steps S6 to S8 until each color bar area of the test partition is detected;
s9: taking the other partition as a test partition, and executing the steps S2 to S8 until each partition of the display module is detected.
In this embodiment, the method is executed in a computer device, where the computer device may be an independent physical server or terminal, or may be a server cluster formed by multiple physical servers, or may be a cloud server that provides basic cloud computing services such as a cloud server, a cloud database, a cloud storage, a CDN, and the like; the camera is a movable camera and can move to the position above each partition on the display area of the display module under the control of the computer equipment so as to collect the images of each partition and detect each partition; since the central pixel is opposite to the camera, even if the camera reflects light to the central pixel, the reflected light is the light of the central pixel, so that the color value of the central pixel is not influenced, namely the central pixel can be regarded as a non-reflective pixel; the color light displayed in the step S4 is pure color light, that is, only one component has a value, and the other two components are all 0, of the red, green and blue components of the color value of the corresponding pixel; the scrolling color bars are colored display strips which are fully distributed in the display area side by side, each color bar rolls in from one edge of the display area and rolls out from the other edge according to the sequence, and the scrolling color bars are non-solid colors, namely, at least two components of red, green and blue of the color value of the corresponding pixel have numerical values; during testing, only the test subareas display the color light, and the other subareas close the color light so as to avoid the influence of the color light of the other subareas on the display color light; after determining the unqualified pixel, determining the pixel position of the unqualified pixel according to the relative distance between the unqualified pixel and the boundary of the display area on the acquired image, or establishing a coordinate system by taking the corner point of the lower left corner of the display module as the center of a circle and taking two mutually perpendicular boundaries of the display area as coordinate axes, further taking the coordinate of the unqualified pixel as the pixel position, and finally outputting the pixel position together.
In the application, as shown in fig. 3, a display area is first divided into a plurality of partitions to detect each partition one by one; firstly, selecting a subarea as a test subarea, distinguishing a reflective pixel and a non-reflective pixel of the test subarea through the color value difference between each pixel and a central pixel, and then screening out potential defective pixels of the non-reflective pixel and the reflective pixel according to the color value difference between the non-reflective pixel and the first average color value of the non-reflective pixel serving as a standard under the condition of pure color display light color; then, the display module is controlled to roll to display a rolling color bar with non-solid color, and the practical test of the display module is realized in the mode because the color displayed by the display module in actual work is mainly non-solid color, so that the test result is more convincing; in the test, for the pixels in each color bar area, the second average color value of the residual non-reflective pixels is used as a standard, the current difference value of the color value of the pixels and the second average color value is compared with the color value deviation obtained in the previous step, so as to determine whether the components of the two deviations are proportional (the abnormal pixels usually have larger difference value and are not proportional to the difference value of the components of the color value difference value), and further unqualified pixels can be screened and marked; the computer equipment outputs unqualified pixels for manual detection again to determine whether the unqualified pixels are qualified; according to the method, whether the display of the pixels is normal or not is determined by comparing the color value deviation of the pixels under the condition that different types of color light are displayed, the problem that the detection is affected due to the reflection of the camera lens is solved, whether the pixels are reflective or non-reflective, the unqualified pixels can be screened out, and the accuracy of the test is remarkably improved.
As a preferred embodiment, after step S3, controlling the test partition to display another color of color light with a set color, and calling the camera to collect another first image and identify the color value of each pixel in the first image, and executing step S3;
and taking pixels with the same color value as the center pixel under the color light of the two set colors as non-reflective pixels, and taking the rest pixels as reflective pixels.
In this embodiment, the first set color is violet light and the second set color is pure green light; under the condition that the colored light with different colors is displayed twice, the identified reflective pixels possibly have small differences, and for the purpose of insurance, the pixels which are identified as the reflective pixels at any one of the two times are taken as the reflective pixels, so that the identification accuracy is improved.
As a preferred embodiment, the color light is pure red, calculating the color value difference between the color value of each pixel and the first average color value, and screening the potentially defective pixel according to the color value difference includes:
s41: calculating the color value difference between the color value of each non-reflective pixel and the first average color value, and determining the non-reflective pixel with the color value difference larger than the first set difference value as a potential defect pixel;
S42: and calculating the color value difference between the color value of each reflective pixel and the first average color value, and determining the reflective pixel with the color value difference larger than the second set difference as a potential defect pixel.
Converting the display color light of the test subarea into pure green light, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, and executing steps S41 to S42;
converting the display color light of the test subarea into pure blue light, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, and executing steps S41 to S42;
for any pixel, if the pixel is determined to be a potential defective pixel after the display color light of the test partition is converted at any time, the pixel is the potential defective pixel;
wherein, since the display color light is pure color light, each color value difference is the difference of a certain color component in the color values.
In this embodiment, since the pixel color value of the reflective pixel is more susceptible to light, the second setting difference may be set larger than the first setting difference, for example, the first setting difference is 5, and the second setting difference is 10; because the potential defective pixel may have deviation in each screening, the method screens the potential defective pixel once under the condition of displaying three color lights, if the pixel is determined to be the potential defective pixel after the color lights displayed by the test partition are converted at any time, the pixel is the potential defective pixel, the deviation caused by single screening is reduced as much as possible, and the screening accuracy is improved.
As shown in fig. 4-5, as a preferred embodiment, each partition is a rectangular partition of uniform size, and for any one partition, the boundary of the partition coincides with the boundary of an adjacent partition, or the extent of the partition coincides partially with the extent of an adjacent partition;
the width of each rolling color bar is consistent, the width of the rolling color bar is smaller than the shortest side of each subarea, and each subarea at least comprises color bar areas of 2 rolling color bars; the colors of any two adjacent rolling color bars are different, the long sides of the two rolling color bars are overlapped, the long side of each rolling color bar is parallel to one side of the display area, and the long side of each rolling color bar is the same as the long side of the display area, so that each rolling color bar arranged in the display area is fully distributed in the display area; controlling each rolling color bar to roll in the display area along the broadside direction of the rolling color bar, so that the rolling color bar in the control test partition rolls;
recording the positions of the rolling color bars at each time point in the rolling process of the rolling color bars;
and taking the rolling color bars in the test partition as first rolling color bars, determining the positions of the rolling color bars at the time point according to the acquisition time point of the third image, further determining the positions of the first rolling color bars, and determining the boundaries of the first rolling color bars according to the positions of the first rolling color bars, so as to determine the color bar areas of the first rolling color bars.
In this embodiment, the partition dividing method is determined according to the aspect ratio of the display screen, and the most ideal state is that the length of each divided partition is equal to the width, and the size of each partition is consistent, but the number of the partitions cannot be too small or too large at the same time, and is generally about 4-10; when dividing, as the boundary of two partitions is far from the center of each partition, a superposition dividing mode can be adopted, and one quarter (or one third, one fifth, etc.) of the length and/or the width of one partition is superposed with the adjacent partition so as to ensure the detection effect of each partition; the scrolling color bar may be parallel to and scroll along the long side of the display area, or the scrolling color bar may be parallel to and scroll along the long side of the display area.
As a preferred embodiment, after step S6, calculating a second average color value of each remaining non-reflective pixel in the test color bar area, determining the remaining non-reflective pixels whose color values differ from the second average color value by more than a first set range as defective pixels, and outputting the defective pixel marks.
In this embodiment, the difference between the color value of the remaining non-reflective pixel and the second average color value, that is, the difference between each color value component of the remaining non-reflective pixel and the corresponding color value component of the second average color value, the first setting range may be-10 to 10; because unqualified pixels still possibly exist in the residual non-reflective pixels subjected to one-time screening, the unqualified pixels in the non-reflective pixels can be further screened through the steps of the embodiment, and the detection accuracy is improved.
As a preferred embodiment, the steps of calculating the current difference between the color value of any one of the remaining reflective pixels and the second average color value, and determining whether the remaining reflective pixel is acceptable according to the difference between the current difference and the corresponding color value difference are as follows:
s70: taking the residual reflective pixels as first pixels;
s71: calculating a first component difference of the red component of the color value of the first pixel and the red component of the second average color value;
s72: calculating a second component difference value between the green component of the color value of the first pixel and the green component of the second average color value;
s73: calculating a third component difference of the blue component of the color value of the first pixel and the blue component of the second average color value;
s74: judging whether the first component difference value, the second component difference value and the third component difference value are the same as the color value difference value of the first pixel under the display color light of the corresponding color or not, if not, the first pixel is unqualified; if yes, judging whether the absolute value of each component difference value is smaller than the absolute value of the set component difference value, if yes, the first pixel is qualified, and if not, the first pixel is unqualified.
In this embodiment, for example, if the first component difference value, the second component difference value and the third component difference value are respectively-10, -15, -18, and the color value difference value of the first pixel under the display color light of the corresponding color is respectively-12, -18, -24, the values are all negative signs, the signs are the same, if the absolute value of the set component difference value is 20, and the absolute values of the three component difference values are 10, 15, 18 and are all less than 20, so that the first pixel is qualified; because unqualified pixels still possibly exist in the residual reflective pixels subjected to one-time screening, the unqualified pixels in the residual reflective pixels can be further screened through the steps of the embodiment, and the detection accuracy is improved.
As a preferred embodiment, the steps of calculating the current difference between the color value of any one of the potentially defective pixels and the second average color value, and determining whether the potentially defective pixel is acceptable according to the difference between the current difference and the corresponding color value difference are as follows:
taking the potential defect pixel as a first pixel, executing the steps S71 to S73, further obtaining a corresponding first component difference value, a second component difference value and a third component difference value, and calculating a first deviation rate corresponding to each component difference value according to the following formula:
wherein,for the first deviation rate corresponding to the i-th component difference value,>for the i-th component difference, +.>The component value of the corresponding color component in the second average color value corresponding to the ith component difference value, i is any one of 1, 2 and 3;
taking the color value difference value of the potential defective pixel under the pure red display color light as a first color value difference value, taking the color value difference value of the potential defective pixel under the pure green display color light as a second color value difference value, taking the color value difference value of the potential defective pixel under the pure blue display color light as a third color value difference value, and calculating a second deviation rate corresponding to each color value difference value according to the following formula:
wherein,a second deviation rate corresponding to the ith color value difference, >For the ith color value difference, +.>The component value of the corresponding color component in the first average color value corresponding to the ith color value difference value, i is any one of 1, 2 and 3;
taking a first ratioSecond ratio->Third ratio->The ratio standard deviation is calculated by the following formula:
wherein, T is the standard deviation of the ratio,is->、/>And +.>Average value of (2);
and judging whether T is larger than the set standard deviation, if so, failing the potential defective pixel, and if not, failing the potential defective pixel.
In this embodiment, for the pixels having no anomaly, the deviation degree of each color value component under different display conditions is close to the same, if the pixels have problems, the deviation degree of each color value component under different display conditions will generate larger access, so the embodiment compares the deviations of each color value component under the front and rear display conditions through the calculation of the first ratio, the second ratio and the third ratio, and further calculates the standard deviation of the three ratios, so that the deviation degree can be reflected, the standard deviation is limited to a set standard deviation (such as 0.05), the deviation degree can be effectively limited, and then the first pixel corresponding to the set standard deviation is determined as a qualified pixel.
As shown in fig. 6, in one embodiment, there is provided a detection device for a display module, each module in the detection device for a display module being configured to perform the steps of a detection method for a display module; the detection device for the display module comprises:
the first processing module is used for dividing the display area of the display module into a plurality of partitions, and taking one partition as a test partition;
the second processing module is used for controlling the test partition to display the color light with the set color, moving the camera to the position right above the center of the test partition, collecting the first image and identifying the color value of each pixel in the first image;
the third processing module is used for taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels and the rest pixels as reflective pixels;
the fourth processing module is used for converting the display color light of the test subarea, collecting a second image and calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, screening out potential defective pixels according to the color value differences, wherein the rest of non-reflective pixels are rest non-reflective pixels, and the rest of reflective pixels are rest reflective pixels;
The fifth processing module is used for controlling the test subarea to display the rolling color bars, collecting a third image and identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area;
a sixth processing module for calculating a second average color value of each remaining non-reflective pixel in the test color bar area;
the seventh processing module is used for respectively calculating the current difference values of the color values of the residual reflective pixels and the potential defect pixels and the second average color value, determining unqualified pixels in the residual reflective pixels and the potential defect pixels according to the current difference values and the corresponding color value difference values, and marking and outputting the unqualified pixels;
an eighth processing module, configured to take another color bar area as a test color bar area, and execute steps S6 to S8 until each color bar area of the test partition is detected;
and the ninth processing module is used for taking the other partition as a test partition, and executing the steps S2 to S8 until each partition of the display module is detected.
The process of implementing respective functions by each module in the detection device for a display module provided in this embodiment of the present application may refer to the description of the embodiment shown in fig. 1, which is not repeated here.
As shown in fig. 7, the present invention provides a detection system for a display module, the detection system for a display module is used for detecting a display module, and the detection system for a display module includes:
the movable camera is used for collecting images when the display module operates;
and the computer equipment is connected with the movable camera and the display module and is used for executing the detection method for the display module.
In this embodiment, the image acquisition device may be moved to a position above each partition on the display area of the display module under the control of the computer device, so as to acquire the image of each partition, and further detect each partition; the computer is matched with the movable camera, and meanwhile, the display module is controlled to display, and the display area is divided into a plurality of subareas so as to detect each subarea one by one; firstly, selecting a subarea as a test subarea, distinguishing a reflective pixel and a non-reflective pixel of the test subarea through the color value difference between each pixel and a central pixel, and then screening out potential defective pixels of the non-reflective pixel and the reflective pixel according to the color value difference between the non-reflective pixel and the first average color value of the non-reflective pixel serving as a standard under the condition of pure color display light color; then, the display module is controlled to roll to display a rolling color bar with non-solid color, and the practical test of the display module is realized in the mode because the color displayed by the display module in actual work is mainly non-solid color, so that the test result is more convincing; in the test, for the pixels in each color bar area, the second average color value of the residual non-reflective pixels is used as a standard, the current difference value of the color value of the pixels and the second average color value is compared with the color value deviation obtained in the previous step, so as to determine whether the components of the two deviations are proportional (the abnormal pixels usually have larger difference value and are not proportional to the difference value of the components of the color value difference value), and further unqualified pixels can be screened and marked; the computer equipment outputs unqualified pixels for manual detection again to determine whether the unqualified pixels are qualified; according to the method, whether the display of the pixels is normal or not is determined by comparing the color value deviation of the pixels under the condition that different types of color light are displayed, the problem that the detection is affected due to the reflection of the camera lens is solved, whether the pixels are reflective or non-reflective, the unqualified pixels can be screened out, and the accuracy of the test is remarkably improved.
FIG. 8 illustrates an internal block diagram of a computer device in one embodiment. As shown in fig. 8, the computer device includes a processor, a memory, a network interface, an input device, and a display screen connected by a system bus. The memory includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system and may also store a computer program, where the computer program when executed by the processor may cause the processor to implement the detection method for a display module provided by the embodiment of the present invention. The internal memory may also store a computer program, which when executed by the processor, causes the processor to execute the detection method for the display module provided by the embodiment of the invention. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in FIG. 8 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, the detection device for a display module provided in the embodiment of the present invention may be implemented as a computer program, and the computer program may be executed on a computer device as shown in fig. 8. The memory of the computer device may store program modules constituting the detection device for a display module, for example, a first processing module, a second processing module, a third processing module, a fourth processing module, a fifth processing module, a sixth processing module, a seventh processing module, an eighth processing module, and a ninth processing module shown in fig. 6. The computer program constituted by the respective program modules causes the processor to execute the steps in the detection method for a display module according to the respective embodiments of the present invention described in the present specification.
For example, the computer apparatus shown in fig. 8 may execute step S1 by the first processing module in the detection device for a display module shown in fig. 6; the computer equipment can execute the step S2 through the second processing module; the computer equipment can execute the step S3 through a third processing module; the computer equipment can execute the step S4 through a fourth processing module; the computer equipment can execute the step S5 through a fifth processing module; the computer equipment can execute the step S6 through a sixth processing module; the computer equipment can execute the step S7 through a seventh processing module; the computer equipment can execute the step S8 through an eighth processing module; the computer device may perform step S9 through a ninth processing module.
In one embodiment, a computer device is presented, the computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
s1: dividing a display area of a display module into a plurality of partitions, and taking one partition as a test partition;
s2: controlling the test subarea to display color light with set colors, moving the camera to be right above the center of the test subarea, collecting a first image and identifying color values of all pixels in the first image;
s3: taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels, and the rest pixels are reflective pixels;
s4: changing the display color light of the test subarea, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, screening out potential defective pixels according to the color value differences, wherein the rest of non-reflective pixels are rest non-reflective pixels, and the rest of reflective pixels are rest of reflective pixels;
s5: controlling the test subarea to display rolling color bars, collecting a third image, identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area; each program module of the detecting device for the display module
S6: calculating a second average color value of each remaining non-reflective pixel in the test color bar area;
s7: respectively calculating the current difference values of the color values and the second average color values of each residual reflective pixel and the potential defect pixel, determining unqualified pixels in each residual reflective pixel and the potential defect pixel according to each current difference value and the corresponding color value difference value, and marking and outputting;
s8: taking the other color bar area as a test color bar area, and executing the steps S6 to S8 until each color bar area of the test partition is detected;
s9: taking the other partition as a test partition, and executing the steps S2 to S8 until each partition of the display module is detected.
In one embodiment, a computer readable storage medium is provided, having a computer program stored thereon, which when executed by a processor causes the processor to perform the steps of:
s1: dividing a display area of a display module into a plurality of partitions, and taking one partition as a test partition;
s2: controlling the test subarea to display color light with set colors, moving the camera to be right above the center of the test subarea, collecting a first image and identifying color values of all pixels in the first image;
S3: taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels, and the rest pixels are reflective pixels;
s4: changing the display color light of the test subarea, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, screening out potential defective pixels according to the color value differences, wherein the rest of non-reflective pixels are rest non-reflective pixels, and the rest of reflective pixels are rest of reflective pixels;
s5: controlling the test subarea to display rolling color bars, collecting a third image, identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area;
s6: calculating a second average color value of each remaining non-reflective pixel in the test color bar area;
s7: respectively calculating the current difference values of the color values and the second average color values of each residual reflective pixel and the potential defect pixel, determining unqualified pixels in each residual reflective pixel and the potential defect pixel according to each current difference value and the corresponding color value difference value, and marking and outputting;
s8: taking the other color bar area as a test color bar area, and executing the steps S6 to S8 until each color bar area of the test partition is detected;
S9: taking the other partition as a test partition, and executing the steps S2 to S8 until each partition of the display module is detected.
It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in various embodiments may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. A method for detecting a display module, the method comprising:
s1: dividing a display area of a display module into a plurality of partitions, and taking one partition as a test partition;
s2: controlling the test subarea to display color light with set colors, moving the camera to be right above the center of the test subarea, collecting a first image and identifying color values of all pixels in the first image;
S3: taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels, and the rest pixels are reflective pixels;
s4: changing the display color light of the test subarea, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, screening out potential defective pixels according to the color value differences, wherein the rest of non-reflective pixels are rest non-reflective pixels, and the rest of reflective pixels are rest of reflective pixels;
s5: controlling the test subarea to display rolling color bars, collecting a third image, identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area;
s6: calculating a second average color value of each remaining non-reflective pixel in the test color bar area;
s7: respectively calculating the current difference values of the color values and the second average color values of each residual reflective pixel and the potential defect pixel, determining unqualified pixels in each residual reflective pixel and the potential defect pixel according to each current difference value and the corresponding color value difference value, and marking and outputting;
s8: taking the other color bar area as a test color bar area, and executing the steps S6 to S8 until each color bar area of the test partition is detected;
S9: taking the other partition as a test partition, and executing the steps S2 to S8 until each partition of the display module is detected;
each partition is a rectangular partition with the same size, and for any one partition, the boundary of the partition is coincident with the boundary of the adjacent partition, or the range of the partition is partially coincident with the range of the adjacent partition;
the width of each rolling color bar is consistent, the width of the rolling color bar is smaller than the shortest side of each subarea, and each subarea at least comprises color bar areas of 2 rolling color bars; the colors of any two adjacent rolling color bars are different, the long sides of the two rolling color bars are overlapped, the long side of each rolling color bar is parallel to one side of the display area, and the long side of each rolling color bar is the same as the long side of the display area, so that each rolling color bar arranged in the display area is fully distributed in the display area; controlling each rolling color bar to roll in the display area along the broadside direction of the rolling color bar, so that the rolling color bar in the control test partition rolls;
recording the positions of the rolling color bars at each time point in the rolling process of the rolling color bars;
and taking the rolling color bars in the test partition as first rolling color bars, determining the positions of the rolling color bars at the time point according to the acquisition time point of the third image, further determining the positions of the first rolling color bars, and determining the boundaries of the first rolling color bars according to the positions of the first rolling color bars, so as to determine the color bar areas of the first rolling color bars.
2. The method according to claim 1, wherein after step S3, the test partition is controlled to display another color of color light of a set color, and the camera is called to collect another first image and identify the color value of each pixel in the first image, and step S3 is performed;
and taking pixels with the same color value as the center pixel under the color light of the two set colors as non-reflective pixels, and taking the rest pixels as reflective pixels.
3. The method of claim 1, wherein the color light is displayed as pure red light, wherein calculating the color value difference between the color value of each pixel and the first average color value, and wherein screening the potentially defective pixel according to the color value difference comprises:
s41: calculating the color value difference between the color value of each non-reflective pixel and the first average color value, and determining the non-reflective pixel with the color value difference larger than the first set difference value as a potential defect pixel;
s42: and calculating the color value difference between the color value of each reflective pixel and the first average color value, and determining the reflective pixel with the color value difference larger than the second set difference as a potential defect pixel.
4. The method of claim 3, wherein the test sub-area is transformed to pure green light, a second image is acquired and a first average color value of non-reflective pixels in the second image is calculated, and steps S41 to S42 are performed;
Converting the display color light of the test subarea into pure blue light, collecting a second image, calculating a first average color value of non-reflective pixels in the second image, and executing steps S41 to S42;
for any pixel, if the pixel is determined to be a potential defective pixel after the display color light of the test partition is converted at any time, the pixel is the potential defective pixel;
wherein, since the display color light is pure color light, each color value difference is the difference of a certain color component in the color values.
5. The method of claim 4, further comprising, after step S6, calculating a second average color value for each remaining non-reflective pixel in the test color bar area, determining the remaining non-reflective pixels having a color value that differs from the second average color value by more than a first set range as defective pixels, and outputting a defective pixel flag.
6. The method of claim 5, wherein the steps of calculating a current difference between the color value of any one of the remaining retroreflective pixels and the second average color value, and determining whether the remaining retroreflective pixel is acceptable based on the difference between the current difference and the corresponding color value difference are as follows:
s70: taking the residual reflective pixels as first pixels;
S71: calculating a first component difference of the red component of the color value of the first pixel and the red component of the second average color value;
s72: calculating a second component difference value between the green component of the color value of the first pixel and the green component of the second average color value;
s73: calculating a third component difference of the blue component of the color value of the first pixel and the blue component of the second average color value;
s74: judging whether the first component difference value, the second component difference value and the third component difference value are the same as the color value difference value of the first pixel under the display color light of the corresponding color or not, if not, the first pixel is unqualified; if yes, judging whether the absolute value of each component difference value is smaller than the absolute value of the set component difference value, if yes, the first pixel is qualified, and if not, the first pixel is unqualified.
7. The method of claim 6, wherein the step of calculating a current difference between the color value of any one of the potentially defective pixels and the second average color value and determining whether the potentially defective pixel is acceptable based on the difference between the current difference and the corresponding color value difference is as follows:
taking the potential defect pixel as a first pixel, executing the steps S71 to S73, further obtaining a corresponding first component difference value, a second component difference value and a third component difference value, and calculating a first deviation rate corresponding to each component difference value according to the following formula:
Wherein,for the first deviation rate corresponding to the i-th component difference value,>for the i-th component difference, +.>The component value of the corresponding color component in the second average color value corresponding to the ith component difference value, i is any one of 1, 2 and 3;
taking the color value difference value of the potential defective pixel under the pure red display color light as a first color value difference value, taking the color value difference value of the potential defective pixel under the pure green display color light as a second color value difference value, taking the color value difference value of the potential defective pixel under the pure blue display color light as a third color value difference value, and calculating a second deviation rate corresponding to each color value difference value according to the following formula:
wherein,a second deviation rate corresponding to the ith color value difference,>for the ith color value difference, +.>The component value of the corresponding color component in the first average color value corresponding to the ith color value difference value, i is any one of 1, 2 and 3;
taking a first ratioSecond ratio->Third ratio->The ratio standard deviation is calculated by the following formula:
wherein, T is the standard deviation of the ratio,is->、/>And +.>Average value of (2);
and judging whether T is larger than the set standard deviation, if so, failing the potential defective pixel, and if not, failing the potential defective pixel.
8. A display module inspection apparatus, wherein each module in the display module inspection apparatus is configured to perform the steps of claim 1; the detection device for the display module comprises:
the first processing module is used for dividing the display area of the display module into a plurality of partitions, and taking one partition as a test partition;
the second processing module is used for controlling the test partition to display the color light with the set color, moving the camera to the position right above the center of the test partition, collecting the first image and identifying the color value of each pixel in the first image;
the third processing module is used for taking pixels with the same color value as the central pixel of the test partition as non-reflective pixels and the rest pixels as reflective pixels;
the fourth processing module is used for converting the display color light of the test subarea, collecting a second image and calculating a first average color value of non-reflective pixels in the second image, calculating color value differences between color values of all pixels and the first average color value, screening out potential defective pixels according to the color value differences, wherein the rest of non-reflective pixels are rest non-reflective pixels, and the rest of reflective pixels are rest reflective pixels;
the fifth processing module is used for controlling the test subarea to display the rolling color bars, collecting a third image and identifying color bar areas of each rolling color bar, and taking one color bar area as a test color bar area;
A sixth processing module for calculating a second average color value of each remaining non-reflective pixel in the test color bar area;
the seventh processing module is used for respectively calculating the current difference values of the color values of the residual reflective pixels and the potential defect pixels and the second average color value, determining unqualified pixels in the residual reflective pixels and the potential defect pixels according to the current difference values and the corresponding color value difference values, and marking and outputting the unqualified pixels;
an eighth processing module, configured to take another color bar area as a test color bar area, and execute steps S6 to S8 until each color bar area of the test partition is detected;
and the ninth processing module is used for taking the other partition as a test partition, and executing the steps S2 to S8 until each partition of the display module is detected.
9. The utility model provides a detecting system for display module assembly, its characterized in that, detecting system for display module assembly is used for detecting the display module assembly, detecting system for display module assembly includes:
the movable camera is used for collecting images when the display module operates;
computer device, connected to the movable camera and the display module, for executing the detection method for a display module according to any one of claims 1 to 7.
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