CN115578956A

CN115578956A - Method, device, equipment and medium for detecting defective pixel points of display panel

Info

Publication number: CN115578956A
Application number: CN202211160511.0A
Authority: CN
Inventors: 林代翔
Original assignee: LG Display Optoelectronics Technology China Co Ltd
Current assignee: LG Display Optoelectronics Technology China Co Ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2023-01-06

Abstract

The invention discloses a method, a device, equipment and a medium for detecting defective pixel points of a display panel. The method for detecting the defective pixel points of the display panel comprises the following steps: acquiring position information of a pixel point to be detected; determining whether the pixel point to be detected is an edge pixel point or not based on the position information of the pixel point to be detected; if so, determining adjacent pixel points and added pixel points of the pixel points to be detected based on the position information of the pixel points to be detected, acquiring the brightness of the adjacent pixel points, the added pixel points and the pixel points to be detected, and comparing the brightness of the adjacent pixel points and the added pixel points with the brightness of the pixel points to be detected to determine whether the pixel points to be detected are bad pixel points; and the sum of the number of the adjacent pixel points and the number of the added pixel points is not less than 4. By adopting the scheme, the problem that the existing detection method for the defective pixel points is poor in accuracy is solved, and the accuracy and the reliability of detection are improved.

Description

Method, device, equipment and medium for detecting defective pixel points of display panel

Technical Field

The invention relates to the technical field of display panel production, in particular to a method, a device, equipment and a medium for detecting defective pixel points of a display panel.

Background

The pixel point is the minimum light-emitting unit of the display picture of the display panel. If abnormal conditions exist in the production process, defective pixels can be generated on the display panel and can affect the display performance of the display panel, so that the detection of the defective pixels on the display panel is very important.

In the prior art, the following method is generally adopted for detecting defective pixel points: as shown in fig. 1, for any pixel point 1 to be detected, the brightness of the pixel point 1 is compared with the brightness of four adjacent pixel points 2, so as to check whether the pixel point 1 to be detected is a defective pixel point. As shown in fig. 2 and fig. 3, for the pixels at the edge of the display panel, there are usually no four adjacent pixels 2, such as upper, lower, left, right, etc., and only three adjacent pixels 2 or two adjacent pixels 2 are compared. For example, for a pixel point 1 to be measured at a corner where two edges are connected, only two adjacent pixel points 2 are compared. As shown in fig. 2, the corner of the pixel point 1 to be measured at the right lower corner is taken as an example, and at this time, the adjacent pixel points 2 only have two adjacent pixel points 2 above and to the left. For the pixel points at the rest edges except the corners, only three adjacent pixel points 2 are compared, as shown in fig. 3, taking the pixel point 1 to be detected at the right edge and not at the corner as an example in fig. 3, and at this time, only three adjacent pixel points 2 at the upper, lower and left sides of the adjacent pixel point 2 of the pixel point 1 to be detected are compared. The prior art has the following defects: for the pixels at the edge, the detection capability is reduced due to the reduction of the contrast pixels, so that the accuracy of the conventional detection method for the defective pixels is poor.

Disclosure of Invention

The invention provides a method, a device, equipment and a medium for detecting defective pixels of a display panel, and aims to solve the problem that the existing method for detecting the defective pixels is poor in accuracy.

According to an aspect of the present invention, a method for detecting a defective pixel of a display panel is provided, where the method includes:

acquiring the position information of the pixel point to be detected;

determining whether the pixel point to be detected is an edge pixel point or not based on the position information of the pixel point to be detected;

if yes, determining adjacent pixel points and added pixel points of the pixel points to be detected based on the position information of the pixel points to be detected, acquiring the brightness of the adjacent pixel points, the added pixel points and the pixel points to be detected, and comparing the brightness of the adjacent pixel points and the added pixel points with the brightness of the pixel points to be detected to determine whether the pixel points to be detected are defective pixel points or not; the sum of the number of the adjacent pixel points and the number of the increased pixel points is not less than 4;

if not, determining adjacent pixel points of the pixel points to be detected based on the position information of the pixel points to be detected, acquiring the brightness of the adjacent pixel points and the pixel points to be detected, and comparing the brightness of the adjacent pixel points and the pixel points to be detected to determine whether the pixel points to be detected are bad pixel points.

In an optional embodiment of the present invention, a distance between the increased pixel point and the pixel point to be detected is smaller than a preset distance.

In an optional embodiment of the present invention, the preset distance is greater than twice the distance between two adjacent pixels and less than three times the distance between two adjacent pixels.

In an optional embodiment of the present invention, the adding pixel point includes a first adding point;

the first adding point and the pixel point to be detected have two same adjacent pixel points.

In an optional embodiment of the present invention, the adding pixel further includes a second adding point;

the second increasing point is located in at least one of the upper direction, the lower direction, the left direction and the right direction of the pixel point to be detected, and the second increasing point and the pixel point to be detected have the same adjacent pixel point.

In an optional embodiment of the present invention, the determining adjacent pixel points and adding pixel points of the pixel point to be detected based on the position information of the pixel point to be detected includes:

determining whether the pixel points to be detected are corner pixel points or not based on the position information of the pixel points to be detected;

if not, determining the pixel points with position information adjacent to the position information of the pixel points to be detected as adjacent pixel points, and determining first increasing points based on the position information of the pixel points to be detected, wherein the number of the first increasing points is two;

if yes, determining pixel points with position information adjacent to the position information of the pixel points to be detected as adjacent pixel points, and determining a first increasing point and a second increasing point based on the position information of the pixel points to be detected; wherein the number of the first increase points is one, and the number of the second increase points is two.

In an optional embodiment of the present invention, before comparing the brightness of the adjacent pixel point and the increased pixel point with the brightness of the pixel point to be detected to determine whether the pixel point to be detected is a defective pixel point, the method further includes:

determining whether the adjacent pixel points and the added pixel points have bad pixel points or not;

if not, executing a step of comparing the brightness of the adjacent pixel points and the increased pixel points with the brightness of the pixel point to be detected so as to determine whether the pixel point to be detected is a bad pixel point;

if so, rejecting defective pixels in the adjacent pixels and the added pixels, and correspondingly, comparing the brightness of the adjacent pixels and the added pixels with the brightness of the pixels to be detected to determine whether the pixels to be detected are the defective pixels, including:

and comparing the brightness of the adjacent pixel points and the increased pixel points which are rejected with the bad pixel points with the brightness of the pixel points to be detected so as to determine whether the pixel points to be detected are the bad pixel points.

According to another aspect of the present invention, there is provided a device for detecting defective pixels of a display panel, the device comprising:

the position acquisition module is used for acquiring the position information of the pixel point to be detected;

the determining module is used for determining whether the pixel point to be detected is an edge pixel point or not based on the position information of the pixel point to be detected;

the first comparison module is used for determining adjacent pixels and added pixels of the pixels to be detected based on the position information of the pixels to be detected when the pixels to be detected are edge pixels, acquiring the brightness of the adjacent pixels, the added pixels and the pixels to be detected, and comparing the brightness of the adjacent pixels and the added pixels with the brightness of the pixels to be detected to determine whether the pixels to be detected are bad pixels; the sum of the number of the adjacent pixel points and the number of the added pixel points is not less than 4;

and the second comparison module is used for determining adjacent pixels of the pixels to be detected based on the position information of the pixels to be detected when the pixels to be detected are not edge pixels, acquiring the brightness of the adjacent pixels and the brightness of the pixels to be detected, and comparing the brightness of the adjacent pixels and the brightness of the pixels to be detected to determine whether the pixels to be detected are defective pixels or not.

According to another aspect of the present invention, there is provided an electronic apparatus including:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,

the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the method for detecting defective pixels on a display panel according to any embodiment of the present invention.

According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to implement the method for detecting defective pixels of a display panel according to any embodiment of the present invention when the computer instructions are executed.

According to the technical scheme of the embodiment of the invention, whether the pixel point to be detected is an edge pixel point is determined based on the position information of the pixel point to be detected by acquiring the position information of the pixel point to be detected, when the pixel point to be detected is the edge pixel point, the adjacent pixel point and the increased pixel point of the pixel point to be detected are determined based on the position information of the pixel point to be detected, the brightness of the adjacent pixel point, the increased pixel point and the pixel point to be detected is acquired, and the brightness of the adjacent pixel point and the increased pixel point is compared with the brightness of the pixel point to be detected to determine whether the pixel point to be detected is a bad pixel point; and the sum of the number of the adjacent pixel points and the number of the increased pixel points is not less than 4. When the pixel point to be detected is not the edge pixel point, determining an adjacent pixel point of the pixel point to be detected based on the position information of the pixel point to be detected, acquiring the brightness of the adjacent pixel point and the pixel point to be detected, and comparing the brightness of the adjacent pixel point and the pixel point to be detected to determine whether the pixel point to be detected is a bad pixel point. Therefore, for the edge pixel points, some increased pixel points can be added on the basis of adjacent pixel points to carry out brightness comparison with the pixel points to be detected, and meanwhile, the sum of the number of the adjacent pixel points and the increased pixel points is not less than 4, so that compared with the existing edge pixel points, only two or three adjacent pixel points can be compared during detection, the detection capability of bad pixel points is remarkably improved, the problem that the accuracy of the existing detection method for the bad pixel points is poor is solved, the detection accuracy and reliability are improved, and the conditions of missed detection and misjudgment are reduced.

It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display panel in which a pixel point to be detected is not an edge pixel point according to the related art;

fig. 2 is a schematic structural diagram of a display panel in which a pixel to be tested is a corner pixel provided in the related art;

fig. 3 is a schematic structural diagram of a display panel in which a pixel to be tested is an edge pixel and is not a corner pixel;

fig. 4 is a flowchart of a method for detecting defective pixels of a display panel according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an edge pixel point serving as a pixel point to be detected of a display panel according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another display panel in which a pixel point to be detected is an edge pixel point according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a to-be-detected pixel point of a display panel according to an embodiment of the present invention as a corner pixel point;

fig. 8 is a block diagram of a device for detecting defective pixels of a display panel according to a second embodiment of the present invention;

fig. 9 is a schematic structural diagram of an electronic device implementing the method for detecting defective pixels on a display panel according to the embodiment of the present invention.

Wherein: 1. a pixel point to be detected; 2. adjacent pixel points; 3. adding pixel points; 31. a first increase point; 32. a second increase point.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention 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 is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, 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.

Example one

Fig. 4 is a flowchart of a method for detecting defective pixels of a display panel according to an embodiment of the present invention, where the method is applicable to a situation of display panel detection, and the method can be executed by a device for detecting defective pixels of a display panel, and the device for detecting defective pixels of a display panel can be implemented in a hardware and/or software manner, and the device for detecting defective pixels of a display panel can be configured in a VAP device, which is a device for detecting pixels of a display panel. As shown in fig. 4, the method for detecting defective pixels of a display panel includes:

and S110, acquiring the position information of the pixel point 1 to be detected.

As shown in fig. 5, the pixel point 1 to be tested is a pixel point that is currently tested to determine whether the pixel point is a defective pixel point, and the position information reflects an actual position of the pixel point 1 to be tested in the display panel. In a specific embodiment, the position information may be a coordinate value, and the actual position of the pixel point 1 to be detected in the display panel can be known through the specific coordinate value of the pixel point 1 to be detected.

S120, determining whether the pixel point 1 to be detected is an edge pixel point or not based on the position information of the pixel point 1 to be detected.

The edge pixel points refer to pixel points located at the edge of the panel, namely pixel points located at the outermost circle among all the pixel points of the panel. In a specific embodiment, when the position information is a coordinate value, it is assumed that the length direction is the X direction, the width direction is the Y direction, 15360 pixels in the X direction, 2160 pixels in the Y direction, and the position information of each pixel is the coordinate value (X, Y), and when X is 1 or 15360, or Y is 1 or 2160, it can be determined that the pixel 1 to be detected is an edge pixel.

If so, go to step S130, otherwise go to step S140.

S130, determining an adjacent pixel point 2 and an added pixel point 3 of the pixel point 1 to be detected based on the position information of the pixel point 1 to be detected, acquiring the brightness of the adjacent pixel point 2, the added pixel point 3 and the pixel point 1 to be detected, and comparing the brightness of the adjacent pixel point 2 and the added pixel point 3 with the brightness of the pixel point 1 to be detected to determine whether the pixel point 1 to be detected is a defective pixel point; and the sum of the number of the adjacent pixel points 2 and the number of the added pixel points 3 is not less than 4.

The adjacent pixel point 2 is a pixel point close to the pixel point 1 to be detected, that is, a pixel point closest to the pixel point 1 to be detected in the four directions of the upper direction, the lower direction, the left direction and the right direction of the pixel point 1 to be detected. The addition of the pixel point 3 is a point which is additionally selected from other pixel points except the adjacent pixel point 2 and is used for comparison with the pixel point 1 to be detected. For the edge pixel, because it is at the edge, the number of the adjacent pixels 2 is usually only two or three, that is, the number of the adjacent pixels 2 used for comparison is less. The defective pixel points comprise defective dark points and defective bright points, the defective dark points refer to points which are fully or slightly dark relative to the compared pixel points, and the defective bright points refer to points which are too bright relative to the compared pixel points. Comparing the brightness of the adjacent pixel point 2 and the increased pixel point 3 with the brightness of the pixel point 1 to be detected means that the pixel point 1 to be detected respectively performs brightness comparison with each adjacent pixel point 2 and each increased pixel point 3.

S140, determining an adjacent pixel point 2 of the pixel point 1 to be detected based on the position information of the pixel point 1 to be detected, acquiring the brightness of the adjacent pixel point 2 and the pixel point 1 to be detected, and comparing the brightness of the adjacent pixel point 2 and the brightness of the pixel point 1 to be detected to determine whether the pixel point 1 to be detected is a bad pixel point.

When the pixel point 1 to be detected is not an edge pixel point, the adjacent pixel points 2 exist in the four directions of the pixel point 1 to be detected, namely the four adjacent pixel points 2 are compared with the pixel point 1 to be detected, so that the brightness of the adjacent pixel points 2 and the brightness of the pixel point 1 to be detected are directly compared, and whether the pixel point 1 to be detected is a defective pixel point can be determined.

According to the scheme, whether the pixel point 1 to be detected is an edge pixel point is determined based on the position information of the pixel point 1 to be detected by obtaining the position information of the pixel point 1 to be detected, when the pixel point 1 to be detected is the edge pixel point, the adjacent pixel point 2 and the added pixel point 3 of the pixel point 1 to be detected are determined based on the position information of the pixel point 1 to be detected, the brightness of the adjacent pixel point 2, the added pixel point 3 and the pixel point 1 to be detected is obtained, and the brightness of the adjacent pixel point 2 and the added pixel point 3 is compared with the brightness of the pixel point 1 to be detected to determine whether the pixel point 1 to be detected is a bad pixel point; and the sum of the number of the adjacent pixel points 2 and the number of the added pixel points 3 is not less than 4. When the pixel point 1 to be detected is not an edge pixel point, determining an adjacent pixel point 2 of the pixel point 1 to be detected based on the position information of the pixel point 1 to be detected, acquiring the brightness of the adjacent pixel point 2 and the pixel point 1 to be detected, and comparing the brightness of the adjacent pixel point 2 and the pixel point 1 to be detected to determine whether the pixel point 1 to be detected is a bad pixel point. Therefore, for the edge pixel points, on the basis of the adjacent pixel points 2, a plurality of additional pixel points 3 are added to be compared with the to-be-detected pixel points 1 in brightness, and meanwhile, the sum of the number of the adjacent pixel points 2 and the number of the additional pixel points 3 is not less than 4, so that compared with the existing edge pixel points, the edge pixel points can only be compared with two or three adjacent pixel points 2 in detection, the detection capability of bad pixel points is obviously improved, the problem that the accuracy of the existing detection method of the bad pixel points is poor is solved, the accuracy and the reliability of detection are improved, and the conditions of omission detection and misjudgment are reduced.

In an optional embodiment of the present invention, a distance between the increased pixel point 3 and the pixel point 1 to be detected is smaller than a preset distance. The contrast of the pixel points is mainly the contrast of the brightness and the luminous area, and each pixel point on the panel has slight difference in materials and manufacturing process, so that the brightness of the whole panel is uneven, and in order to judge whether the pixel point is qualified or not more accurately, the pixel point closer to the pixel point 1 to be detected is preferably selected for comparison, and the difference between the materials and the manufacturing process at the moment is minimum. Therefore, the distance between the added pixel point 3 and the pixel point 1 to be detected is smaller than the preset distance, so that the accuracy and reliability of detection can be improved, and the conditions of missed detection and erroneous judgment are reduced.

On the basis of the above embodiment, the preset distance is greater than twice the distance between two adjacent pixels and less than three times the distance between two adjacent pixels. Wherein, two adjacent pixel points are two nearest pixel points, the distance with the pixel point 1 that awaits measuring is greater than the two times interval of adjacent pixel point and is less than the three times interval of two adjacent pixel points, it is the nearest pixel point from the pixel point 1 that awaits measuring than adjacent pixel point 2, through making the distance of predetermineeing be greater than the two times interval of adjacent pixel point and be less than the three times interval of two adjacent pixel points, can make the material that increases pixel point 3 from pixel point 1 that awaits measuring and preparation technology difference less, improve the accuracy and the reliability of inspection, reduce the condition emergence of missing the inspection and erroneous judgement.

In an alternative embodiment of the present invention, as shown in fig. 6, the adding pixel point 3 includes a first adding point 31; the first adding point 31 and the pixel point 1 to be detected have two same adjacent pixel points 2. Because the pixel points are regularly arranged, the first increasing point 31 of the adjacent pixel point 2 which has two same values with the pixel point 1 to be detected is the pixel point which is nearest to the pixel point 1 to be detected except the adjacent pixel point 2. For the pixel point 1 to be measured at the right edge of the display panel, the first adding point 31 is the pixel point above and below the adjacent pixel point 2 at the left of the pixel point 1 to be measured. Because the first adding point 31 is the closest pixel point to the pixel point 1 to be detected except the adjacent pixel point 2, the difference between the material and the manufacturing process of the pixel point 1 to be detected is small, the accuracy and the reliability of the detection are improved, and the conditions of missing detection and erroneous judgment are reduced.

On the basis of the above embodiment, as shown in fig. 7, the adding pixel point 3 further includes a second adding point 32; the second adding point 32 is located in at least one of the upper, lower, left and right directions of the pixel point 1 to be detected, and has one same adjacent pixel point 2 as the pixel point 1 to be detected.

The adjacent pixel point 2 of the pixel point 1 to be detected is located between the second increase point 32 and the pixel point 1 to be detected, and the second increase point 32 is the pixel point which is closest to the pixel point 1 to be detected except for the adjacent pixel point 2 and the first increase point 31. The second adding point 32 is the closest pixel point to the pixel point 1 to be detected except the adjacent pixel point 2 and the first adding point 31, so that the difference between the material and the manufacturing process of the pixel point 1 to be detected is small, the accuracy and the reliability of detection are improved, and the conditions of missing detection and erroneous judgment are reduced.

In an optional embodiment of the present invention, the determining, based on the position information of the pixel point 1 to be detected, an adjacent pixel point 2 and an additional pixel point 3 of the pixel point 1 to be detected includes:

and determining whether the pixel point 1 to be detected is a corner pixel point or not based on the position information of the pixel point 1 to be detected.

If not, determining the pixel point with the position information adjacent to the position information of the pixel point 1 to be detected as an adjacent pixel point 2, and determining a first increasing point 31 based on the position information of the pixel point 1 to be detected, wherein the number of the first increasing points 31 is two.

If yes, determining a pixel point with position information adjacent to the position information of the pixel point 1 to be detected as an adjacent pixel point 2, and determining a first increasing point 31 and a second increasing point 32 based on the position information of the pixel point 1 to be detected; wherein the number of the first increase points 31 is one, and the number of the second increase points 32 is two.

As shown in fig. 6 and 7, the corner pixel point refers to a pixel point at a corner where two edges are connected, and for the corner pixel point, only two adjacent pixel points 2 are compared, that is, one of an upper left, an upper right, a lower left, and a lower right. For example, when the corner pixel is the pixel at the corner of the lower right corner, the adjacent pixels 2 only have the pixels above and to the left. For edge pixels that do not belong to corner pixels, there are three adjacent pixels 2. There are various ways to determine whether the pixel 1 to be detected is a corner pixel according to the position information, for example, when the position information is a coordinate value, the determination can be conveniently performed according to the coordinate value. In a specific embodiment, the position information is a coordinate value, it is assumed that there are 15360 pixels in the X direction and 2160 pixels in the Y direction, and the position information of each pixel is a coordinate value (X, Y), and when the pixel coordinate is one of (1, 1), (1, 2160), (15360, 1), (15360, 2160), the pixel 1 to be tested is determined to be a corner pixel.

To the border pixel that is not in the corner pixel, it has three adjacent pixel 2, and it has two first increase points 31 simultaneously, and then adjacent pixel 2 and the sum of first increase point 31 are five, so five pixel at this moment and the pixel 1 that awaits measuring contrast, can comparatively accurate detection out the pixel 1 that awaits measuring whether be bad pixel, need not to increase extra pixel again and contrast. Meanwhile, the two first increasing points 31 are symmetrical, and the distance between the two first increasing points 31 and the pixel point 1 to be detected is the same, so that the consistency is kept on objective conditions, the validity of comparison data can be ensured, and the detection accuracy is improved.

For the border pixel that is the corner pixel, because it is at the corner, so only have two adjacent pixels 2, also only have one first increase point 31 simultaneously, if do not increase second increase point 32, then the pixel quantity for the comparison is too little, increase second increase point 32 this moment, the quantity of second increase point 32 is two simultaneously, two second increase point 32 are also symmetrical for the pixel 1 that awaits measuring, two second increase points 32 are the same with the distance that awaits measuring between the pixel 1 that awaits measuring, consequently keep the uniformity on the objective condition, can ensure the validity of contrast data, the precision of detection has been improved.

Compared with the prior art that the edge pixel points can only be compared with two or three adjacent pixel points 2 during detection, the method has the advantages that the bad detection capability of the edge pixel points of the display panel is obviously improved by 0.11%, the detection accuracy and reliability are improved, and the conditions of missed detection and misjudgment are reduced.

In an optional embodiment of the present invention, before comparing the brightness of the adjacent pixel point 2 and the increased pixel point 3 with the brightness of the pixel point 1 to be detected to determine whether the pixel point 1 to be detected is a defective pixel point, the method further includes:

and determining whether the adjacent pixel point 2 and the added pixel point 3 have bad pixel points.

If not, the step of comparing the brightness of the adjacent pixel point 2 and the increased pixel point 3 with the brightness of the pixel point 1 to be detected so as to determine whether the pixel point 1 to be detected is a bad pixel point is executed.

If yes, rejecting bad pixel points in the adjacent pixel points 2 and the added pixel points 3, and correspondingly, comparing the brightness of the adjacent pixel points 2 and the added pixel points 3 with the brightness of the pixel points 1 to be detected to determine whether the pixel points 1 to be detected are the bad pixel points, including:

and comparing the brightness of the adjacent pixel point 2 and the increased pixel point 3 which are rejected to the brightness of the pixel point 1 to be detected so as to determine whether the pixel point 1 to be detected is a defective pixel point.

For example, when the adjacent pixel 2 and the added pixel 3 are adjacent pixels in four directions, namely, the adjacent pixel 2 and the added pixel 3 are defective pixels, brightness comparison is performed between the added pixel 3 and the adjacent pixels in four directions, namely, the adjacent pixel 2 and the added pixel 3 are defective pixels, and otherwise, the defective pixels do not exist. In addition, for a plurality of pixel points in one display panel, the detection can be carried out synchronously, the detection can also be carried out according to a specific sequence, and when the detection is carried out according to the specific sequence, the detection result of the detected pixel points can be stored in the system. For example, when the adjacent pixel point 2 and the added pixel point 3 have been subjected to the defective detection before the detection of the pixel point 1 to be detected, whether the adjacent pixel point 2 and the added pixel point 3 are defective pixels can be directly determined according to the detection result.

When no defective pixel exists in the adjacent pixel 2 and the added pixel 3, it is indicated that the adjacent pixel 2 and the added pixel 3 are both normal pixels, and therefore, the brightness of the adjacent pixel 2 and the added pixel 3 can be directly compared with the brightness of the pixel 1 to be detected to determine whether the pixel 1 to be detected is a defective pixel.

When a defective pixel exists in the adjacent pixel 2 and the added pixel 3, the result obtained by comparing the pixel 1 to be detected with the defective pixel is incorrect, and whether the pixel 1 to be detected is the defective pixel cannot be accurately determined. Rejecting the defective pixel points in the adjacent pixel points 2 and the increased pixel points 3 at the moment, and comparing the brightness of the adjacent pixel points 2 and the increased pixel points 3 which reject the defective pixel points with the brightness of the pixel points 1 to be detected to determine whether the pixel points 1 to be detected are the defective pixel points or not, so that the obtained result is more accurate, the defective detection capability of the edge pixel points of the display panel is improved, the accuracy and the reliability of detection are improved, and the conditions of omission and misjudgment are reduced.

Example two

Fig. 8 is a schematic structural diagram of a device for detecting a defective pixel of a display panel according to a second embodiment of the present invention. As shown in fig. 5 and 8, the apparatus for detecting defective pixels of a display panel includes:

and the position obtaining module 61 is configured to obtain position information of the pixel point 1 to be detected.

And the determining module 62 is configured to determine whether the pixel point 1 to be detected is an edge pixel point based on the position information of the pixel point 1 to be detected.

A first comparison module 63, configured to, when the pixel to be detected is an edge pixel, determine an adjacent pixel 2 and an added pixel 3 of the pixel to be detected 1 based on the position information of the pixel to be detected 1, obtain the brightness of the adjacent pixel 2, the added pixel 3 and the pixel to be detected 1, and compare the brightness of the adjacent pixel 2 and the added pixel 3 with the brightness of the pixel to be detected 1 to determine whether the pixel to be detected 1 is a defective pixel; and the sum of the number of the adjacent pixel points 2 and the number of the added pixel points 3 is not less than 4.

And the second comparison module 64 is configured to, when the pixel to be detected is not an edge pixel, determine an adjacent pixel 2 of the pixel to be detected 1 based on the position information of the pixel to be detected 1, obtain the brightness of the adjacent pixel 2 and the pixel to be detected 1, and compare the brightness of the adjacent pixel 2 with the brightness of the pixel to be detected 1 to determine whether the pixel to be detected 1 is a defective pixel.

Optionally, the distance between the added pixel point 3 and the pixel point 1 to be detected is smaller than a preset distance.

Optionally, the preset distance is greater than twice the distance between two adjacent pixels and less than three times the distance between two adjacent pixels.

Optionally, as shown in fig. 6, the adding pixel point 3 includes a first adding point 31; the first adding point 31 and the pixel point 1 to be detected have two same adjacent pixel points 2.

Optionally, as shown in fig. 7, the adding pixel point 3 further includes a second adding point 32; the second adding point 32 is located in at least one of the upper, lower, left and right directions of the pixel point 1 to be detected, and has one same adjacent pixel point 2 as the pixel point 1 to be detected.

Optionally, as shown in fig. 6 and 7, the first comparison module 63 includes a corner determination sub-module, a first determination sub-module, and a second determination sub-module.

And the corner determining submodule is used for determining whether the pixel point 1 to be detected is a corner pixel point based on the position information of the pixel point 1 to be detected.

The first determining submodule is used for determining a pixel point with position information adjacent to the position information of the pixel point 1 to be detected as an adjacent pixel point 2 when the pixel point 1 to be detected is a corner pixel point, and determining the first increasing points 31 based on the position information of the pixel point 1 to be detected, wherein the number of the first increasing points 31 is two.

A second determining submodule, configured to determine, when the pixel point 1 to be detected is not a corner pixel point, a pixel point whose position information is adjacent to the position information of the pixel point 1 to be detected as an adjacent pixel point 2, and determine the first increase point 31 and the second increase point 32 based on the position information of the pixel point 1 to be detected; wherein the number of the first increase points 31 is one, and the number of the second increase points 32 is two.

Optionally, the device for detecting the defective pixel points of the display panel further comprises a defect determining module, an executing module and a rejecting module.

And the bad determining module is used for determining whether the adjacent pixel points 2 and the added pixel points 3 have bad pixel points.

And the execution module is used for comparing the brightness of the adjacent pixel points 2 and the increased pixel points 3 with the brightness of the pixel point 1 to be detected to determine whether the pixel point 1 to be detected is a bad pixel point when the adjacent pixel points 2 and the increased pixel points 3 have bad pixel points.

And the rejecting module is used for rejecting the defective pixel point in the adjacent pixel point 2 and the added pixel point 3 when the adjacent pixel point 2 and the added pixel point 3 do not have the defective pixel point, and correspondingly, the first comparing module 63 is also used for comparing the brightness of the adjacent pixel point 2 and the added pixel point 3 which reject the defective pixel point with the brightness of the pixel point 1 to be detected so as to determine whether the pixel point 1 to be detected is the defective pixel point.

The detection device for the defective pixel points of the display panel, provided by the embodiment of the invention, can execute the detection method for the defective pixel points of the display panel, provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

EXAMPLE III

FIG. 9 illustrates a schematic diagram of an electronic device 10 that may be used to implement embodiments of the present invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 9, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the Random Access Memory (RAM) 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, read Only Memory (ROM) 12 and Random Access Memory (RAM) 13 are connected to each other by a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.

A number of components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.

Processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various dedicated Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, and so forth. The processor 11 performs the various methods and processes described above, such as the detection of defective pixels of the display panel.

In some embodiments, the method for detecting defective pixels of the display panel can be implemented as a computer program, which is tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via a Read Only Memory (ROM) 12 and/or the communication unit 19. When the computer program is loaded into the RAM13 and executed by the processor 11, one or more steps of the method for detecting defective pixels of a display panel described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the method of detecting defective pixels of the display panel by any other suitable means (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user may provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired result of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting a defective pixel of a display panel is characterized by comprising the following steps:

acquiring the position information of the pixel point to be detected;

if so, determining adjacent pixel points and added pixel points of the pixel points to be detected based on the position information of the pixel points to be detected, acquiring the brightness of the adjacent pixel points, the added pixel points and the pixel points to be detected, and comparing the brightness of the adjacent pixel points and the added pixel points with the brightness of the pixel points to be detected to determine whether the pixel points to be detected are bad pixel points; the sum of the number of the adjacent pixel points and the number of the increased pixel points is not less than 4;

2. The method of claim 1, wherein the distance between the increased pixel and the pixel to be tested is less than a predetermined distance.

3. The method of claim 2, wherein the predetermined distance is greater than two times the distance between two adjacent pixels and less than three times the distance between two adjacent pixels.

4. The method according to any one of claims 1 to 3, wherein the added pixels comprise a first added pixel;

5. The method of claim 4, wherein the added pixels further comprise a second added pixel;

6. The method according to claim 5, wherein the determining of the neighboring pixel points and the added pixel points of the pixel points to be detected based on the position information of the pixel points to be detected comprises:

if not, determining pixel points with position information adjacent to the position information of the pixel points to be detected as adjacent pixel points, and determining first increasing points based on the position information of the pixel points to be detected, wherein the number of the first increasing points is two;

7. The method for detecting defective pixels of a display panel according to any one of claims 1 to 3, wherein before comparing the brightness of the neighboring pixels and the increased pixels with the brightness of the pixels to be detected to determine whether the pixels to be detected are defective pixels, the method further comprises:

and comparing the brightness of the adjacent pixel points and the increased pixel points with the brightness of the pixel points to be detected to determine whether the pixel points to be detected are defective pixel points or not.

8. The utility model provides a detection apparatus for bad pixel of display panel which characterized in that includes:

9. An electronic device, characterized in that the electronic device comprises:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the method of detecting defective pixels of a display panel according to any one of claims 1 to 7.

10. A computer-readable storage medium storing computer instructions for causing a processor to execute the method for detecting defective pixels of a display panel according to any one of claims 1 to 7.