CN115147362A - Detection method, detection device and detection system for display panel - Google Patents
Detection method, detection device and detection system for display panel Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 50
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- 238000007689 inspection Methods 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 6
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Abstract
The application provides a detection method, a detection device and a detection system of a display panel, wherein the method comprises the following steps: under the condition that a panel of a display to be detected is in a bright screen state, acquiring a gray image and a plurality of standard templates of a display picture of the display to be detected, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas with the same coordinates as the corresponding areas to be detected in the display picture of the qualified display when the panel of the qualified display is in the bright screen state; comparing the similarity of the area to be detected with the corresponding standard template to obtain a plurality of comparison results, wherein the comparison results correspond to the area to be detected one by one; and determining the qualification of the panel of the display according to all the comparison results. The method solves the problem that the accuracy rate of manually detecting the defects of the display panel is low in the prior art.
Description
Technical Field
The application relates to the technical field of automatic detection of displays, in particular to a detection method, a detection device, a computer-readable storage medium, a processor and a detection system of a display panel.
Background
The panel of the air conditioner display is used as an important component of the air conditioner, temperature and a mode can be obtained through the panel of the air conditioner display, in the production process, the panel of the air conditioner display has the defects of black film sticking deviation, lamp loss, pen drawing loss, abnormal function area display and the like, most of the defects of the panel of the air conditioner display are detected by human eyes, the detection of the human eyes is limited, people can see too many displays, eye fatigue exists, misjudgment is avoided, and when the demand of the display is large, the efficiency of people sometimes cannot meet the actual production of a production line, intelligent detection cannot be achieved, in addition, systematic analysis on defect type data cannot be carried out, and effective defect data recording cannot be formed.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The present application mainly aims to provide a method, an apparatus, a computer-readable storage medium, a processor and a system for detecting a display panel, so as to solve the problem of low accuracy in manual detection of defects of the display panel in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a detection method of a display panel, the detection method including: under the condition that a panel of a display to be detected is in a bright screen state, acquiring a gray image and a plurality of standard templates of a display picture of the display to be detected, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas, which have the same coordinates as the corresponding areas to be detected, in the display picture of the qualified display when the panel of the qualified display is in the bright screen state; comparing the similarity of the areas to be detected with the corresponding standard templates to obtain a plurality of comparison results, wherein the comparison results correspond to the areas to be detected one by one; and determining the qualification of the panel of the display according to all the comparison results.
Optionally, in a case that a protective film is attached to the panel of the display to be detected, before the similarity comparison between the area to be detected and the corresponding standard template is performed to obtain a plurality of comparison results, the method further includes: and determining that the protective film meets the requirement of the fitting standard.
Optionally, the protective film includes a plurality of first sidelines, the panel of the display to be detected includes a plurality of second sidelines, the first sidelines and the second sidelines are in one-to-one correspondence, and determining that the protective film meets the requirement of the attachment standard includes: obtaining the minimum distance between each first sideline and the corresponding second sideline, and obtaining the included angle between each first sideline and the corresponding second sideline; judging whether the minimum distance between each first sideline and the corresponding second sideline is within a preset distance threshold range or not, and judging whether the included angle between each first sideline and the corresponding second sideline is within a preset angle threshold range or not; and determining that the protective film meets the requirement of the bonding standard under the condition that the minimum distance between all the first sidelines and the corresponding second sidelines is within the preset distance threshold range and the included angles between all the first sidelines and the corresponding second sidelines are within the preset angle threshold range.
Optionally, obtaining a plurality of standard templates comprises: under the condition that the panel of the qualified display is in the bright screen state, acquiring an image of the area with the same coordinate as the corresponding area to be detected in the display picture of the qualified display; and carrying out gray processing on the image of the area with the same coordinate as the corresponding area to be detected in the display picture of the qualified display to obtain a plurality of standard templates.
Optionally, one of the comparison results comprises a matching score, and determining eligibility of the panel of the display based on all of the comparison results comprises: acquiring a plurality of preset score thresholds, wherein the preset score thresholds correspond to the matching scores one to one; determining that the panel of the display to be detected is qualified under the condition that each matching score is greater than or equal to the corresponding preset score threshold value; and determining that the panel of the display to be detected is unqualified under the condition that at least one matching score is smaller than the corresponding preset score threshold value.
Optionally, the acquiring a grayscale image of a display screen of the display to be detected includes: under the condition that the panel of the display to be detected is in the bright screen state, acquiring an image of a display picture of the display to be detected; and carrying out gray level processing on the image of the display picture of the display to be detected to obtain a gray level image of the display picture of the display to be detected.
According to another aspect of embodiments of the present invention, there is provided a detection apparatus of a display panel, the detection apparatus including: the device comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring a gray image and a plurality of standard templates of a display picture of a display to be detected under the condition that a panel of the display to be detected is in a bright screen state, the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas with the same coordinates as the corresponding areas to be detected in the display picture of the qualified display when the panel of the qualified display is in the bright screen state; the comparison unit is used for comparing the similarity of the to-be-detected region with the similarity of the corresponding standard template to obtain a plurality of comparison results, and the comparison results are in one-to-one correspondence with the to-be-detected region; and the determining unit is used for determining the qualification of the panel of the display according to all the comparison results.
According to still another aspect of embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program executes any one of the methods.
According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes any one of the methods.
According to an aspect of the embodiments of the present invention, there is also provided a detection system of a display panel, including: a display, one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods.
In the method for detecting the display panel, firstly, under the condition that the panel of the display to be detected is in a bright screen state, a gray image of a display picture of the display to be detected and a plurality of standard templates are obtained, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas with the same coordinates as the corresponding areas to be detected in the display picture of the qualified display when the panel of the qualified display is in the bright screen state; then, carrying out similarity comparison on the to-be-detected area and the corresponding standard template to obtain a plurality of comparison results, wherein the comparison results correspond to the to-be-detected area one by one; finally, the qualification of the panel of the display is determined according to all the comparison results. The method comprises the steps of obtaining a gray image of a panel of a display to be detected, reducing the data amount required to be processed in the image, comparing similarity of a standard template and a corresponding region to be detected to obtain a plurality of comparison results, namely performing similarity analysis on the region to be detected of the panel of the display to be detected and a region, which is in the same coordinate with the corresponding region to be detected, of a panel of a qualified display to obtain the similarity of the two regions, determining whether the region to be detected has a display defect according to the similarity of the two regions, determining whether the panel of the display is qualified according to all the comparison results, namely determining whether the panel of the display to be detected is qualified according to the detection results of the display defects of all the regions to be detected, and solving the problem that the accuracy of manually detecting the defects of the panel of the display in the prior art is low.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a flow chart of a method of inspection of a display panel according to an embodiment of the present application;
FIG. 2 is a flow chart illustrating a method for inspecting a display panel according to an embodiment of the present application;
FIG. 3 shows a schematic view of a camera and light source placement location according to an embodiment of the present application;
FIG. 4 shows a schematic diagram of a display panel according to an embodiment of the present application;
fig. 5 shows a schematic diagram of a detection apparatus of a display panel according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background of the invention, in order to solve the above problems, the prior art has low accuracy in manual detection of defects of a display panel, and in an exemplary embodiment of the present application, a method, an apparatus, a computer-readable storage medium, a processor, and a detection system for detecting a display panel are provided.
According to an embodiment of the present application, there is provided a method of detecting a display panel.
Fig. 1 is a flowchart of a method for inspecting a display panel according to an embodiment of the present disclosure. As shown in fig. 1, the method comprises the steps of:
step S101, under the condition that a panel of a display to be detected is in a bright screen state, acquiring a gray image and a plurality of standard templates of a display picture of the display to be detected, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas, which have the same coordinate as the corresponding areas to be detected, in the display picture of the qualified display when the panel of the qualified display is in the bright screen state;
step S102, comparing the similarity of the area to be detected with the corresponding standard template to obtain a plurality of comparison results, wherein the comparison results correspond to the area to be detected one by one;
step S103, determining the qualification of the panel of the display according to all the comparison results.
In the method for detecting the display panel, firstly, under the condition that the panel of the display to be detected is in a bright screen state, a gray image of a display picture of the display to be detected and a plurality of standard templates are obtained, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas with the same coordinates as the corresponding areas to be detected in the display picture of the qualified display when the panel of the qualified display is in the bright screen state; then, carrying out similarity comparison on the to-be-detected area and the corresponding standard template to obtain a plurality of comparison results, wherein the comparison results correspond to the to-be-detected area one by one; finally, the qualification of the panel of the display is determined according to all the comparison results. The method comprises the steps of obtaining a gray image of a panel of a display to be detected, reducing the data amount required to be processed in the image, comparing similarity of a standard template and a corresponding region to be detected to obtain a plurality of comparison results, namely performing similarity analysis on the region to be detected of the panel of the display to be detected and a region, which is in the same coordinate with the corresponding region to be detected, of a panel of a qualified display to obtain the similarity of the two regions, determining whether the region to be detected has a display defect according to the similarity of the two regions, determining whether the panel of the display is qualified according to all the comparison results, namely determining whether the panel of the display to be detected is qualified according to the detection results of the display defects of all the regions to be detected, and solving the problem that the accuracy of manually detecting the defects of the panel of the display in the prior art is low.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
In an optional embodiment of the application, in a case that a protection film is attached to a panel of the display to be detected, before similarity comparison is performed between the area to be detected and the corresponding standard template to obtain a plurality of comparison results, the method further includes: and determining that the protective film meets the requirement of the attaching standard. In this embodiment, as shown in fig. 2, the quality inspection of the panel of the display to be inspected includes two steps of appearance defect inspection and display defect inspection, the appearance defect inspection is to inspect whether the protective film of the panel of the display to be inspected meets the requirement of the attachment standard, the display defect inspection is performed after it is determined that the protective film of the panel of the display to be inspected meets the requirement of the attachment standard, and when it is determined that the protective film of the panel of the display to be inspected does not meet the requirement of the attachment standard, that is, it is determined that the protective film of the panel of the display to be inspected is partially attached, it is directly determined that the panel of the display to be inspected is unqualified, and it is determined that the display to be inspected is an unqualified piece.
In an optional embodiment of the present application, the protection film includes a plurality of first edge lines, the panel of the display to be detected includes a plurality of second edge lines, the first edge lines and the second edge lines correspond to each other one by one, and determining that the protection film meets the requirement of the adhesion standard includes: acquiring the minimum distance between each first sideline and the corresponding second sideline, and acquiring the included angle between each first sideline and the corresponding second sideline; judging whether the minimum distance between each first sideline and the corresponding second sideline is within a preset distance threshold range or not, and judging whether the included angle between each first sideline and the corresponding second sideline is within a preset angle threshold range or not; and determining that the protective film meets the requirement of the laminating standard under the condition that the minimum distance between all the first sidelines and the corresponding second sidelines is within the preset distance threshold range and the included angles between all the first sidelines and the corresponding second sidelines are within the preset angle threshold range. In this embodiment, as shown in fig. 3, when detecting whether the protective film of the panel of the display to be detected meets the requirement of the attachment standard, strip-shaped light sources need to be placed around the display to be detected, and the display to be detected needs to be fixed and shot in a limited manner, a shooting device is installed above the display to be detected, when the panel of the display to be detected is in a dark screen state, a camera at a shooting position is used to take pictures of the panel of the display to be detected, so as to obtain an appearance image of the panel of the display to be detected, and the appearance image of the panel of the display to be detected is subjected to binarization processing, so as to reduce the data amount in the appearance image of the panel of the display to be detected, as shown in fig. 4, the outline of an area between the frame of the protective film and the white frame of the panel of the display to be detected is highlighted, and the black area is the area where the protective film is located, the white area is an area between a frame of the protective film and a white frame of a panel of the display to be detected, then Mask operation is carried out on an appearance image of the panel of the display to be detected after binarization processing, an interested area is left, namely only an area between the frame of the protective film and the white frame of the panel of the display to be detected is left, pixels of the rest areas are 0 values, a minimum circumscribed quadrangle of the outline of the area between the frame of the protective film and the white frame of the panel of the display to be detected is drawn, all first sidelines and corresponding second sidelines are obtained, and then as shown in figure 2, the protective film of the panel of the display to be detected meets the requirement of a protective film attaching standard under the condition that the minimum distance between the first sideline and the corresponding second sideline is within a preset distance threshold range, namely the distance between the sideline of the protective film and the corresponding sideline of the panel of the display to be detected is approximately equal to a preset width threshold value, meanwhile, when the included angle between the first side line and the corresponding second side line is within the preset angle threshold range, namely the side line of the protective film is approximately parallel to the side line corresponding to the panel of the display to be detected, the protective film of the panel of the display to be detected can be determined to meet the requirement of the attachment standard, and the two indexes are added together, so that the protective film can be more accurately determined to meet the requirement of the attachment standard. Under the condition that the distance between the sideline of the protection film and the corresponding sideline of the panel of the display to be detected is not equal to the preset width threshold value, determining that the protection film of the panel of the display to be detected does not meet the requirement of the fitting standard, namely determining that the protection film of the panel of the display to be detected is partially fitted, meanwhile, when the sideline of the protection film is not parallel to the corresponding sideline of the panel of the display to be detected, determining that the protection film of the panel of the display to be detected is partially fitted, determining that the panel of the display to be detected is unqualified, and preventing the display with the appearance defect from flowing into the next station.
In an optional embodiment of the present application, the obtaining a plurality of standard templates includes: under the condition that the panel of the qualified display is in the bright screen state, acquiring an image of the area with the same coordinate as the corresponding area to be detected in the display picture of the qualified display; and carrying out gray processing on the image of the area with the same coordinate as the corresponding area to be detected in the display picture of the qualified display to obtain a plurality of standard templates. In this embodiment, after determining that the protective film of the panel of the display to be detected meets the requirement of the attachment standard, performing display defect detection on the panel of the display to be detected, before performing display defect detection on the panel of the display to be detected, acquiring a plurality of standard templates as a reference standard for judging whether the panel of the display to be detected has a display defect, specifically, taking an image of an area in a display picture of a qualified display, which is the same as a corresponding coordinate of the area to be detected, taking the panel of the display of an air conditioner as an example, the area to be detected includes a lamp full-bright functional area, a 21-degree air supply functional area, a dehumidification 23-degree functional area, a standby functional area, a refrigeration 16-degree functional area, a refrigeration 25-degree functional area and a refrigeration 30-degree functional area, the 7 areas to be detected can cover all possible display defect conditions of a panel of the air conditioner display, binarization processing is carried out on images of areas, with the same coordinates as the corresponding areas to be detected, in a display picture of the qualified display to obtain a plurality of standard templates, then display defect detection is carried out on the panel of the display to be detected, each standard template slides on a gray image of the display picture of the display to be detected, the areas to be detected, with the same coordinates as the standard templates, are matched by adopting a normalized correlation coefficient matching method, the matching scores of the areas to be detected and the standard templates are the highest, namely the matching scores of the brightness and the similarity are the highest, and the matching scores and the coordinates of the areas to be detected are recorded, wherein the normalized correlation coefficient matching method can be replaced by adopting a template matching method such as a normalized square error matching method or a correlation coefficient matching method.
In an alternative embodiment of the present application, the comparison result comprises a matching score, and determining the eligibility of the panel of the display based on all of the comparison results comprises: acquiring a plurality of preset score thresholds, wherein the preset score thresholds correspond to the matching scores one by one; determining that the panel of the display to be detected is qualified under the condition that each matching score is greater than or equal to the corresponding preset score threshold value; and determining that the panel of the display to be detected is unqualified under the condition that at least one matching score is smaller than the corresponding preset score threshold value. In the embodiment, when the display defect detection of the panel of the display to be detected is performed, the similarity between the area to be detected in the panel of the display to be detected and a standard template, namely a gray image of an area, having the same coordinates as the corresponding area to be detected, in a display picture of the qualified display, is reflected through a matching score, when the matching score is greater than or equal to a preset score threshold value, namely the similarity between the area to be detected and the standard template reaches the minimum requirement that the area to be detected does not have the display defect, it is determined that the area to be detected does not have the display defect, when all the areas to be detected do not have the display defect, it is determined that the panel of the display to be detected is qualified, and if one or more areas to be detected have the display defect, it is determined that the panel of the display to be detected is unqualified, and it is further determined that the display to be detected is an unqualified piece, so that the display with the display defect in the panel is prevented from flowing into the next station.
In an optional embodiment of the application, after the panel of the display to be detected is subjected to display defect detection, the defect picture and the defect type of the display with appearance defects or display defects on the panel are fed back to a quality control department, the defect type is analyzed in time, the production is adjusted in time, and therefore the display with the display defects is prevented from being reproduced next time, as shown in fig. 2, the display defects can be further specifically divided into three display defects of display lamp loss, display stroke loss and display area display abnormity.
In an optional embodiment of the present application, the acquiring a gray image of a display screen of the to-be-detected display includes: under the condition that the panel of the display to be detected is in the bright screen state, acquiring an image of a display picture of the display to be detected; and carrying out gray processing on the image of the display picture of the display to be detected to obtain a gray image of the display picture of the display to be detected. In the embodiment, strip-shaped light sources do not need to be placed around the to-be-detected display, under the condition that a panel to be detected and displayed is in a bright screen state, a camera at a shooting position is used for obtaining a display picture of the to-be-detected display, an image of the display picture of the to-be-detected display is obtained, binarization processing is carried out on the image of the display picture of the to-be-detected display, a gray level image of the display picture of the to-be-detected display is obtained, the data volume needing to be processed in the image of the display picture of the to-be-detected display is reduced, and the detection rate is further improved.
The embodiment of the present application further provides a detection apparatus for a display panel, and it should be noted that the detection apparatus for a display panel according to the embodiment of the present application can be used to execute the detection method for a display panel provided in the embodiment of the present application. The following describes an apparatus for detecting a display panel according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a detection apparatus of a display panel according to an embodiment of the present application. As shown in fig. 5, the apparatus includes:
the device comprises an acquisition unit 10, a display control unit and a display control unit, wherein the acquisition unit acquires a gray image and a plurality of standard templates of a display picture of a display to be detected under the condition that a panel of the display to be detected is in a bright screen state, the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas with the same coordinates as the corresponding areas to be detected in the display picture of the qualified display when the panel of the qualified display is in the bright screen state;
a comparison unit 20, configured to compare similarity between the regions to be detected and the corresponding standard templates to obtain a plurality of comparison results, where the comparison results are in one-to-one correspondence with the regions to be detected;
and a determining unit 30 for determining the qualification of the panel of the display based on all the comparison results.
In the detection device for the display panel, an obtaining unit obtains a gray image of a display picture of a display to be detected and a plurality of standard templates under the condition that the panel of the display to be detected is in a bright screen state, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas, which have the same coordinates as the corresponding areas to be detected, in the display picture of the qualified display when the panel of the qualified display is in the bright screen state; the comparison unit is used for comparing the similarity of the to-be-detected area with the similarity of the corresponding standard template to obtain a plurality of comparison results, and the comparison results are in one-to-one correspondence with the to-be-detected area; and a determining unit for determining the qualification of the display panel according to all the comparison results. The method comprises the steps of obtaining a gray image of a panel of a display to be detected, reducing the data amount needing to be processed in the image, comparing similarity between a standard template and a corresponding area to be detected to obtain a plurality of comparison results, namely performing similarity analysis on the area to be detected of the panel of the display to be detected and an area, which is in the same coordinate with the corresponding area to be detected, of a panel of a qualified display to obtain the similarity between the area to be detected and the area to be detected, determining whether the area to be detected has display defects according to the similarity between the area to be detected and the area to be detected, determining whether the panel of the display to be detected is qualified according to all the comparison results, namely determining whether the panel of the display to be detected is qualified according to the detection results of the display defects of all the areas to be detected.
In an optional embodiment of the present application, the detection apparatus for a display panel further includes a first determination unit, where the first determination unit is configured to determine that the protective film meets the requirement of the bonding standard. In this embodiment, as shown in fig. 2, the quality inspection of the panel of the display to be inspected includes two steps of appearance defect inspection and display defect inspection, the appearance defect inspection is to inspect whether the protective film of the panel of the display to be inspected meets the requirement of the attachment standard, the display defect inspection is performed after it is determined that the protective film of the panel of the display to be inspected meets the requirement of the attachment standard, and when it is determined that the protective film of the panel of the display to be inspected does not meet the requirement of the attachment standard, that is, it is determined that the protective film of the panel of the display to be inspected is partially attached, it is directly determined that the panel of the display to be inspected is unqualified, and it is determined that the display to be inspected is an unqualified piece.
In an optional embodiment of the present application, the first determining unit includes a first obtaining module, a determining module, and a first determining module, where the first obtaining module is configured to obtain a minimum distance between each first edge line and the corresponding second edge line, and obtain an included angle between each first edge line and the corresponding second edge line; the judging module is used for judging whether the minimum distance between each first sideline and the corresponding second sideline is within a preset distance threshold range or not and judging whether the included angle between each first sideline and the corresponding second sideline is within a preset angle threshold range or not; the first determining module is configured to determine that the protective film meets the requirement of the bonding standard when the minimum distance between all the first sidelines and the corresponding second sidelines is within the preset distance threshold range and the included angle between all the first sidelines and the corresponding second sidelines is within the preset angle threshold range. In this embodiment, as shown in fig. 3, when detecting whether the protective film of the panel of the display to be detected meets the requirement of the attachment standard, strip-shaped light sources need to be placed around the display to be detected, and the display to be detected needs to be fixed and shot in a limited manner, a shooting device is installed above the display to be detected, when the panel of the display to be detected is in a dark screen state, a camera at a shooting position is used to take pictures of the panel of the display to be detected, so as to obtain an appearance image of the panel of the display to be detected, and the appearance image of the panel of the display to be detected is subjected to binarization processing, so as to reduce the data amount in the appearance image of the panel of the display to be detected, as shown in fig. 4, the outline of an area between the frame of the protective film and the white frame of the panel of the display to be detected is highlighted, and the black area is the area where the protective film is located, the white area is an area between a frame of the protective film and a white frame of a panel of the display to be detected, then Mask operation is carried out on an appearance image of the panel of the display to be detected after binarization processing, an interested area is left, namely only an area between the frame of the protective film and the white frame of the panel of the display to be detected is left, pixels of the rest areas are 0 values, a minimum circumscribed quadrangle of the outline of the area between the frame of the protective film and the white frame of the panel of the display to be detected is drawn, all first sidelines and corresponding second sidelines are obtained, and then as shown in figure 2, the protective film of the panel of the display to be detected meets the requirement of a protective film attaching standard under the condition that the minimum distance between the first sideline and the corresponding second sideline is within a preset distance threshold range, namely the distance between the sideline of the protective film and the corresponding sideline of the panel of the display to be detected is approximately equal to a preset width threshold value, meanwhile, when the included angle between the first side line and the corresponding second side line is within the preset angle threshold range, namely the side line of the protective film is approximately parallel to the side line corresponding to the panel of the display to be detected, the protective film of the panel of the display to be detected can be determined to meet the requirement of the bonding standard, and the two indexes are added together, so that the protective film can be more accurately determined to meet the requirement of the bonding standard. Under the condition that the distance between the sideline of the protection film and the corresponding sideline of the panel of the display to be detected is not equal to the preset width threshold value, determining that the protection film of the panel of the display to be detected does not meet the requirement of the fitting standard, namely determining that the protection film of the panel of the display to be detected is partially fitted, meanwhile, when the sideline of the protection film is not parallel to the corresponding sideline of the panel of the display to be detected, determining that the protection film of the panel of the display to be detected is partially fitted, determining that the panel of the display to be detected is unqualified, and preventing the display with the appearance defect from flowing into the next station.
In an optional embodiment of the application, the acquiring unit includes a second acquiring module and a first processing module, where the second acquiring module is configured to acquire, when a panel of the qualified display is in the bright screen state, an image of the area in a display screen of the qualified display, where the area has the same coordinate as the corresponding area to be detected; the first processing module is configured to perform gray processing on an image of the area in the display screen of the qualified display, where the area has the same coordinate as the corresponding area to be detected, to obtain a plurality of standard templates. In this embodiment, after determining that the protective film of the panel of the display to be detected meets the requirement of the attachment standard, performing display defect detection on the panel of the display to be detected, before performing display defect detection on the panel of the display to be detected, acquiring a plurality of standard templates as a reference standard for judging whether the panel of the display to be detected has a display defect, specifically, taking an image of an area in a display picture of a qualified display, which is the same as a corresponding coordinate of the area to be detected, taking the panel of the display of an air conditioner as an example, the area to be detected includes a lamp full-bright functional area, a 21-degree air supply functional area, a dehumidification 23-degree functional area, a standby functional area, a refrigeration 16-degree functional area, a refrigeration 25-degree functional area and a refrigeration 30-degree functional area, the 7 areas to be detected can cover all possible display defect conditions of a panel of the air conditioner display, binarization processing is carried out on images of areas, with the same coordinates as the corresponding areas to be detected, in a display picture of the qualified display to obtain a plurality of standard templates, then display defect detection is carried out on the panel of the display to be detected, each standard template slides on a gray image of the display picture of the display to be detected, the areas to be detected, with the same coordinates as the standard templates, are matched by adopting a normalized correlation coefficient matching method, the matching scores of the areas to be detected and the standard templates are the highest, namely the matching scores of the brightness and the similarity are the highest, and the matching scores and the coordinates of the areas to be detected are recorded, wherein the normalized correlation coefficient matching method can be replaced by adopting a template matching method such as a normalized square error matching method or a correlation coefficient matching method.
In an optional embodiment of the present application, the determining unit includes a third obtaining module, a second determining module, and a third determining module, where the third obtaining module is configured to obtain a plurality of preset score thresholds, and the preset score thresholds are in one-to-one correspondence with the matching scores; the second determining module is configured to determine that the panel of the display to be detected is qualified when each of the matching scores is greater than or equal to the corresponding preset score threshold; the third determining module is configured to determine that the panel of the display to be detected is unqualified when at least one of the matching scores is smaller than the corresponding preset score threshold. In the embodiment, when the display defect detection of the panel of the display to be detected is carried out, the similarity between the area to be detected in the panel of the display to be detected and a gray image of an area, which has the same coordinates as the corresponding area to be detected, in a display picture of a qualified display to be detected is reflected through a matching score, the similarity between the area to be detected and the standard template reaches the minimum requirement that the area to be detected does not have the display defect when the matching score is larger than or equal to a preset score threshold, the area to be detected does not have the display defect, the similarity between the area to be detected and the standard template does not reach the minimum requirement that the area to be detected does not have the display defect when the matching score is smaller than the preset score threshold, the area to be detected is determined to have the display defect, when all the areas to be detected have no display defect, the panel of the display to be detected is determined to be qualified, if one or more areas to be detected have the display defect, the panel of the display to be detected is determined to be unqualified, and the display to be detected is further determined to be unqualified, and the display with the display having the defect is prevented from flowing into the next station.
In an optional embodiment of the application, after the panel of the display to be detected is subjected to display defect detection, the defect picture and the defect type of the display with appearance defects or display defects on the panel are fed back to a quality control department, the defect type is analyzed in time, the production is adjusted in time, and therefore the display with the display defects is prevented from being reproduced next time, as shown in fig. 2, the display defects can be further specifically divided into three display defects of display lamp loss, display stroke loss and display area display abnormity.
In an optional embodiment of the present application, the acquiring unit includes a fourth acquiring module and a second processing module, where the fourth acquiring module is configured to acquire an image of a display image of the display to be detected when the panel of the display to be detected is in the bright screen state; the second processing module is used for carrying out gray scale processing on the image of the display picture of the display to be detected to obtain a gray scale image of the display picture of the display to be detected. In the embodiment, strip-shaped light sources do not need to be placed around the to-be-detected display, under the condition that a panel to be detected and displayed is in a bright screen state, a camera at a shooting position is used for obtaining a display picture of the to-be-detected display, an image of the display picture of the to-be-detected display is obtained, binarization processing is carried out on the image of the display picture of the to-be-detected display, a gray level image of the display picture of the to-be-detected display is obtained, the data volume needing to be processed in the image of the display picture of the to-be-detected display is reduced, and the detection rate is further improved.
The detection device of the display panel comprises a processor and a memory, wherein the acquisition unit, the comparison unit, the determination unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one kernel can be set, and the problem of low accuracy in manual detection of defects of the display panel in the prior art is solved by adjusting kernel parameters.
The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a storage medium, on which a program is stored, which, when executed by a processor, implements the above-described method for detecting a display panel.
The embodiment of the invention provides a processor, which is used for running a program, wherein the detection method of the display panel is executed when the program runs.
The embodiment of the invention provides a detection system of a display panel, which comprises: a display, one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the above methods, the processors when executing the programs implementing at least the following:
step S101, under the condition that a panel of a display to be detected is in a bright screen state, acquiring a gray image and a plurality of standard templates of a display picture of the display to be detected, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas, which have the same coordinate as the corresponding areas to be detected, in the display picture of the qualified display when the panel of the qualified display is in the bright screen state;
step S102, comparing the similarity of the area to be detected with the corresponding standard template to obtain a plurality of comparison results, wherein the comparison results are in one-to-one correspondence with the area to be detected;
step S103, determining the qualification of the panel of the display according to all the comparison results.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:
step S101, under the condition that a panel of a display to be detected is in a bright screen state, acquiring a gray image and a plurality of standard templates of a display picture of the display to be detected, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas, which have the same coordinate as the corresponding areas to be detected, in the display picture of the qualified display when the panel of the qualified display is in the bright screen state;
step S102, comparing the similarity of the area to be detected with the corresponding standard template to obtain a plurality of comparison results, wherein the comparison results correspond to the area to be detected one by one;
step S103, determining the qualification of the panel of the display according to all the comparison results.
In the above embodiments of the present invention, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described in detail in a certain embodiment.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) The method for detecting the display panel comprises the steps of firstly, under the condition that the panel of a display to be detected is in a bright screen state, obtaining a gray image of a display picture of the display to be detected and a plurality of standard templates, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas, which have the same coordinates as the corresponding areas to be detected, in the display picture of the qualified display when the panel of the qualified display is in the bright screen state; then, carrying out similarity comparison on the to-be-detected area and the corresponding standard template to obtain a plurality of comparison results, wherein the comparison results correspond to the to-be-detected area one by one; finally, the qualification of the panel of the display is determined according to all the comparison results. The method comprises the steps of obtaining a gray image of a panel of a display to be detected, reducing the data amount required to be processed in the image, comparing similarity of a standard template and a corresponding region to be detected to obtain a plurality of comparison results, namely performing similarity analysis on the region to be detected of the panel of the display to be detected and a region, which is in the same coordinate with the corresponding region to be detected, of a panel of a qualified display to obtain the similarity of the two regions, determining whether the region to be detected has a display defect according to the similarity of the two regions, determining whether the panel of the display is qualified according to all the comparison results, namely determining whether the panel of the display to be detected is qualified according to the detection results of the display defects of all the regions to be detected, and solving the problem that the accuracy of manually detecting the defects of the panel of the display in the prior art is low.
2) In the detection device for the display panel, an obtaining unit obtains a gray image of a display picture of a display to be detected and a plurality of standard templates under the condition that the panel of the display to be detected is in a bright screen state, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas, which have the same coordinates as the corresponding areas to be detected, in the display picture of the qualified display when the panel of the qualified display is in the bright screen state; the comparison unit is used for comparing the similarity of the to-be-detected area with the similarity of the corresponding standard template to obtain a plurality of comparison results, and the comparison results are in one-to-one correspondence with the to-be-detected area; and a determining unit for determining the qualification of the display panel according to all the comparison results. The method comprises the steps of obtaining a gray image of a panel of a display to be detected, reducing the data amount required to be processed in the image, comparing similarity of a standard template with a corresponding region to be detected to obtain a plurality of comparison results, namely performing similarity analysis on the region to be detected of the panel of the display to be detected and a region, identical to the corresponding region to be detected, of a panel of a qualified display to obtain the similarity of the two regions, determining whether the region to be detected has a display defect according to the similarity of the two regions, determining whether the panel of the display is qualified according to all the comparison results, namely determining whether the panel of the display to be detected is qualified according to the detection results of the display defects of all the regions to be detected, and solving the problem that the accuracy of manually detecting the defects of the panel of the display in the prior art is low.
3) The application discloses display panel's detecting system includes: the system comprises a display, one or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprise a program for executing any one of the methods, the system acquires a gray-scale image of a panel of the display to be detected, reduces the data amount required to be processed in the image, compares the similarity of a standard template with a corresponding area to be detected to obtain a plurality of comparison results, namely, performs similarity analysis on the area to be detected of the panel of the display to be detected and an area with the same coordinate as the corresponding area to be detected in a panel of a qualified display to obtain the similarity of the two areas, and then determines whether the area to be detected has a display defect according to the similarity of the two areas, determines whether the panel of the display is qualified according to all the comparison results, namely, determines whether the panel of the display to be detected is qualified according to the detection results of the display defects of all the areas to be detected, and solves the problem that the accuracy rate of manually detecting the defects of the panel of the display in the prior art is low.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A detection method of a display panel is characterized by comprising the following steps:
under the condition that a panel of a display to be detected is in a bright screen state, acquiring a gray image and a plurality of standard templates of a display picture of the display to be detected, wherein the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas, which have the same coordinates as the corresponding areas to be detected, in the display picture of the qualified display when the panel of the qualified display is in the bright screen state;
comparing the similarity of the to-be-detected region with the corresponding standard template to obtain a plurality of comparison results, wherein the comparison results correspond to the to-be-detected region one to one;
and determining the qualification of the panel of the display according to all the comparison results.
2. The method according to claim 1, wherein in a case that a protective film is attached to a panel of the display to be detected, before comparing the similarity of the area to be detected with the corresponding standard template to obtain a plurality of comparison results, the method further comprises:
and determining that the protective film meets the requirements of the attaching standard.
3. The method of claim 2, wherein the protective film comprises a plurality of first edges, the panel of the display to be detected comprises a plurality of second edges, the first edges and the second edges are in one-to-one correspondence, and determining that the protective film meets the requirement of the bonding standard comprises:
acquiring the minimum distance between each first sideline and the corresponding second sideline, and acquiring the included angle between each first sideline and the corresponding second sideline;
judging whether the minimum distance between each first sideline and the corresponding second sideline is within a preset distance threshold range or not, and judging whether the included angle between each first sideline and the corresponding second sideline is within a preset angle threshold range or not;
and determining that the protective film meets the requirement of the bonding standard under the condition that the minimum distance between all the first sidelines and the corresponding second sidelines is within the preset distance threshold range and the included angles between all the first sidelines and the corresponding second sidelines are within the preset angle threshold range.
4. The method of claim 1, wherein obtaining a plurality of standard templates comprises:
under the condition that the panel of the qualified display is in the bright screen state, acquiring an image of the area with the same coordinate as the corresponding area to be detected in the display picture of the qualified display;
and carrying out gray processing on the image of the area with the same coordinate as the corresponding area to be detected in the display picture of the qualified display to obtain a plurality of standard templates.
5. The method of claim 1, wherein one of the comparison results comprises a match score, and wherein determining the eligibility of the panel of the display based on all of the comparison results comprises:
acquiring a plurality of preset score thresholds, wherein the preset score thresholds correspond to the matching scores one to one;
determining that the panel of the display to be detected is qualified under the condition that each matching score is greater than or equal to the corresponding preset score threshold value;
and determining that the panel of the display to be detected is unqualified under the condition that at least one matching score is smaller than the corresponding preset score threshold value.
6. The method of claim 1, wherein obtaining a grayscale image of a display frame of the display to be tested comprises:
under the condition that the panel of the display to be detected is in the bright screen state, acquiring an image of a display picture of the display to be detected;
and carrying out gray processing on the image of the display picture of the display to be detected to obtain a gray image of the display picture of the display to be detected.
7. A detection apparatus of a display panel, the detection apparatus comprising:
the device comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring a gray image and a plurality of standard templates of a display picture of a display to be detected under the condition that a panel of the display to be detected is in a bright screen state, the gray image comprises a plurality of areas to be detected, the areas to be detected correspond to the standard templates one by one, and the standard templates are gray images of areas with the same coordinates as the corresponding areas to be detected in the display picture of the qualified display when the panel of the qualified display is in the bright screen state;
the comparison unit is used for comparing the similarity of the to-be-detected region with the similarity of the corresponding standard template to obtain a plurality of comparison results, and the comparison results are in one-to-one correspondence with the to-be-detected region;
and the determining unit is used for determining the qualification of the panel of the display according to all the comparison results.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program performs the method of any one of claims 1 to 6.
9. A processor, characterized in that the processor is configured to run a program, wherein the program when running performs the method of any of claims 1 to 6.
10. A system for inspecting a display panel, comprising: a display, one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing the method of any of claims 1-6.
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| CN202210719437.5A CN115147362A (en) | 2022-06-23 | 2022-06-23 | Detection method, detection device and detection system for display panel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115578462A (en) * | 2022-11-18 | 2023-01-06 | 深圳市全正科技有限公司 | Machine vision positioning control system applied to automatic opposite pasting of display screen optical films |
| CN116168021A (en) * | 2023-04-21 | 2023-05-26 | 中江立江电子有限公司 | Fault part identification system and method |
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2022
- 2022-06-23 CN CN202210719437.5A patent/CN115147362A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115578462A (en) * | 2022-11-18 | 2023-01-06 | 深圳市全正科技有限公司 | Machine vision positioning control system applied to automatic opposite pasting of display screen optical films |
| CN115578462B (en) * | 2022-11-18 | 2023-03-07 | 深圳市全正科技有限公司 | Machine vision positioning control system applied to automatic opposite pasting of display screen optical films |
| CN116168021A (en) * | 2023-04-21 | 2023-05-26 | 中江立江电子有限公司 | Fault part identification system and method |
| CN116168021B (en) * | 2023-04-21 | 2023-08-29 | 中江立江电子有限公司 | Fault part identification system and method |
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