Display module detection method, device, equipment, system and electronic terminal

Abstract

This application provides a method, apparatus, device, system, and electronic terminal for detecting display modules. The method includes controlling the display module to be tested to be illuminated based on preset grayscale data; the display module to be tested includes multiple LEDs arranged in an array; acquiring a display image of the display module to be tested in the illuminated state as the image to be tested; detecting the image to be tested to obtain detection information for each LED; the detection information includes optical data and appearance data; and performing optical defect detection and appearance defect detection based on the LED detection information to obtain the detection result of the display module to be tested. This application, by acquiring a display image of the display module to be tested in the illuminated state under preset grayscale data, can quickly realize optical defect detection and appearance defect detection based on the optical data and appearance data of the LEDs, improving the defect detection efficiency of the display module; and compared with the prior art, it also reduces the cost of the detection equipment.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a method, apparatus, equipment, system, electronic terminal, and computer-readable storage medium for detecting display modules. Background Technology

[0002] Display modules typically consist of multiple LEDs. During assembly, factors such as manufacturing processes and environmental conditions can cause some LEDs to become damaged. Therefore, to ensure the stability of the display module's function, it is usually necessary to perform a power-on test and visual inspection to identify which LEDs in the display module are malfunctioning.

[0003] However, when performing lighting tests and appearance inspections on the LEDs in the display module, it is necessary to use Automated Optical Inspection (AOI) equipment for appearance inspection and lighting test equipment for optical defect detection, resulting in poor defect detection efficiency for the display module. Summary of the Invention

[0004] The main technical problem addressed by this application is to provide a method, apparatus, equipment, system, electronic terminal, and computer-readable storage medium for detecting display modules, thereby solving the problem of poor defect detection efficiency in the prior art.

[0005] To solve the above-mentioned technical problems, the first technical solution adopted in this application is: to provide a method for detecting a display module, the method comprising:

[0006] The display module under test is controlled to be lit based on preset grayscale data; the display module under test includes multiple LEDs arranged in an array.

[0007] The display image of the display module to be tested in the lit state is obtained as the image to be tested;

[0008] The image to be inspected is inspected to obtain the detection information of each light point; the detection information includes optical data and appearance data.

[0009] Optical and appearance defects are detected based on the detection information of the light points, and the detection results of the display module to be tested are obtained.

[0010] The preset grayscale data values ​​are greater than 0 and less than 255.

[0011] The process of acquiring the display image of the display module under test in the lit state as the image to be detected includes:

[0012] The image acquisition device captures images of at least some of the lights on the display module to be tested when they are lit, thus obtaining the image to be tested corresponding to the display module to be tested; wherein the display module to be tested is located at the target viewing angle of the image acquisition device.

[0013] Multiple light points are used to display multiple colors, including at least red, green, and blue;

[0014] The image to be detected is obtained as the display image of the display module under test when it is lit, including:

[0015] A white display image is taken of the display module to be tested, with all the LEDs on, to obtain the image of the display module to be tested.

[0016] The detection information for the light points also includes the location information of the light points;

[0017] Optical defect detection and appearance defect detection are performed based on the detection information of the light points to obtain the detection results of the display module under test, including:

[0018] Optical defect detection is performed based on the optical data of the light points to obtain the first detection result of the light points;

[0019] Based on the appearance data of the light points, appearance defects are detected to obtain the second detection result of the light points;

[0020] Based on the first and second detection results corresponding to the light points with the same location information, the detection result of the display module to be tested is determined.

[0021] The optical data includes at least one of luminance data and chromaticity data;

[0022] Optical defect detection is performed based on the optical data of the light points to obtain the first detection result of the light points, including:

[0023] The optical data of each lamp point is compared with the optical data threshold to determine the optical difference value between the optical data of the lamp point and the optical data threshold.

[0024] Based on the optical difference values ​​of the lamp points, determine whether there are optical defects in the lamp points;

[0025] In response to the presence of optical defects in the lamp points, the optical detection category of the lamp points is determined based on the optical difference values ​​of the lamp points;

[0026] The optical detection category and location information of the light point are fused together to form the first detection result of the light point.

[0027] The appearance data includes at least one of chromaticity data, grayscale data, and edge data;

[0028] Based on the appearance data of the light points, appearance defect detection is performed to obtain the second detection result of the light points, including:

[0029] The appearance data of the lights is compared with the preset intervals in the database;

[0030] If the appearance data of the light point is within a preset range, the preset detection result corresponding to the preset range will be determined as the appearance detection category of the light point.

[0031] The appearance detection category and location information of the light point are fused together to form the second detection result of the light point.

[0032] The detection result of the display module to be tested is determined based on the first and second detection results corresponding to the light points with the same location information, including:

[0033] If the optical detection category in the first detection result corresponding to the lamp point is a first preset category, then the first detection result corresponding to the lamp point is taken as the detection result of the display module to be tested; the first preset category includes at least one of color deviation defect, bright lamp defect, dark lamp defect, and dead lamp defect;

[0034] And / or, in response to the second inspection result corresponding to the light point having an appearance inspection category of the second preset category, the second inspection result corresponding to the light point is taken as the inspection result of the display module to be inspected; the second preset category includes at least one of the following: light point adhesive defects, light point misalignment, light point surface scratches, light point dirt, LED bead corner defects, light point misalignment, polarity reversal, light point omission, presence of foreign objects in the light point, and light point sideways movement.

[0035] The preset grayscale data has a value greater than 0 and less than 128.

[0036] To solve the above-mentioned technical problems, the second technical solution adopted in this application is: to provide a detection device for a display module, the detection device for the display module comprising:

[0037] The control module is used to control the display module under test to be lit up based on preset grayscale data; the display module under test includes multiple LEDs arranged in an array.

[0038] The acquisition module is used to acquire the display image of the display module under test when it is lit up as the image to be detected;

[0039] The feature detection module is used to detect the image to be detected and obtain the detection information of each light point; the detection information includes optical data and appearance data;

[0040] The defect detection module is used to perform optical defect detection and appearance defect detection based on the detection information of the light points, and obtain the detection results of the display module to be inspected.

[0041] To solve the above-mentioned technical problems, the third technical solution adopted in this application is: to provide an electronic terminal, including a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, it implements the steps of the detection method for the display module as described in the first technical solution above.

[0042] To solve the above-mentioned technical problems, the fourth technical solution adopted in this application is: to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the detection method for the display module as described in the first technical solution above.

[0043] To solve the above-mentioned technical problems, the fifth technical solution adopted in this application is: to provide a testing device for display modules, the testing device for display modules comprising:

[0044] The data acquisition station is used to place the display module to be tested; the display module to be tested includes multiple LEDs arranged in an array.

[0045] An image acquisition device is used to capture images of the display module to be inspected placed at the acquisition station as the images to be inspected; the acquisition station is located at the target viewing angle of the image acquisition device.

[0046] The controller is connected to the acquisition station and image acquisition device. It is used to control the display module to be tested to be lit up based on preset grayscale data; to detect the image to be tested and obtain the detection information of each light point; the detection information includes optical data and appearance data; and to perform optical defect detection and appearance defect detection based on the light point detection information to obtain the detection result of the display module to be tested.

[0047] This also includes:

[0048] The supplementary lighting device is connected to the controller signal and set at a preset position on the image acquisition device to provide preset illumination when the image acquisition device acquires the image to be detected.

[0049] To solve the above-mentioned technical problems, the sixth technical solution adopted in this application is: to provide a detection system for display modules, the detection system for display modules including the detection equipment for display modules as described in the fifth technical solution above.

[0050] The beneficial effects of this application are as follows: Unlike existing technologies, this application provides a method, apparatus, device, system, electronic terminal, and computer-readable storage medium for detecting display modules. The method includes: controlling the display module to be tested to be illuminated based on preset grayscale data; the display module to be tested includes multiple LEDs arranged in an array; acquiring a display image of the display module in the illuminated state as the image to be tested; detecting the image to be tested to obtain detection information for each LED; the detection information includes optical data and appearance data; and performing optical defect detection and appearance defect detection based on the LED detection information to obtain the detection result of the display module to be tested. This application, by acquiring a display image of the display module to be tested in the illuminated state under preset grayscale data, facilitates the simultaneous acquisition of optical and appearance data of each LED in the display module, shortening data acquisition time. Based on the optical and appearance data of the LEDs, optical defect detection and appearance defect detection can be quickly achieved, improving the defect detection efficiency of the display module; and compared to existing technologies, it also reduces the cost of the testing equipment. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram illustrating an application scenario of a display template provided in an embodiment of this application;

[0053] Figure 2 This is a schematic diagram illustrating an application scenario of a lamp arrangement provided in one embodiment of this application;

[0054] Figure 3 This is a flowchart illustrating an embodiment of the display module detection method provided by the present invention;

[0055] Figure 4 This is the present invention. Figure 3 A flowchart illustrating a specific embodiment of step S4 in the provided method for detecting display modules;

[0056] Figure 5 This is a schematic diagram of the frame of an embodiment of the detection device for display modules provided by the present invention;

[0057] Figure 6 This is a schematic diagram of the framework of an embodiment of the display module testing device provided by the present invention;

[0058] Figure 7This is a schematic diagram of the framework of an embodiment of the detection system for display modules provided by the present invention;

[0059] Figure 8 This is a schematic diagram of the framework of an embodiment of the electronic terminal provided by the present invention;

[0060] Figure 9 This is a schematic diagram of a framework of an embodiment of the computer-readable storage medium provided by the present invention. Detailed Implementation

[0061] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0062] In the following description, specific details such as particular system architectures, interfaces, and technologies are presented for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of this application.

[0063] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0064] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0065] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0066] It should be understood that the display module in the embodiments of this application can be of various types, such as light-emitting diode (LED), liquid crystal display (LCD), organic electroluminescence display (OLED), micro LED, sub-millimeter light-emitting diode (mini LED), surface mounted device (SMD), and chip on board (COB), etc. This embodiment does not limit the specific type of display module.

[0067] The display module can be a cabinet, a light panel, or a display module in the form of a bracket, and the structure of the module can be rectangular, square, or circular, without limitation. In this embodiment, a light panel is used as an example for explanation.

[0068] Reference Figure 1 , Figure 1 This is a schematic diagram illustrating an application scenario of a display module provided in an embodiment of this application.

[0069] Figure 1 The area represented by the rectangle in the diagram can be considered as the structure of the display module 100 (i.e., the light panel). Multiple target areas 101 are arranged in an array on the display module 100, and each target area 101 can be provided with light points 10. Therefore, it can be considered that the light points 10 are also arranged in an array.

[0070] It should be noted that the target area 101 may have only one light point 10 or multiple light points 10. For example, one light point 10 may be set in a target area 101; two light points 10 may be set in a target area 101; three, four, or five light points 10 may also be set in a target area 101, depending on the actual situation, and there is no limitation thereto. Each light point 10 is used to display a color. For example, one of red, blue, and green. In this embodiment, the display module 100 may include light points 10 for displaying multiple colors, wherein the multiple colors include at least two of red, green, and blue. For example, it may be red and blue, red and green, blue and green, or red, green, and blue, and there is no limitation thereto.

[0071] It should be noted that, in this embodiment, the multiple light points 10 set in any target area 101 can be considered to be in the same position in the display module 100. For example, refer to... Figure 2 , Figure 2 This is a schematic diagram illustrating an application scenario of a lamp arrangement provided in an embodiment of this application. Figure 2 In this example, target area 101 can be equipped with three light points 10, each light point 10 used to display red, green, and blue respectively. It can be considered that... Figure 2 The position of each light point 10 in the display module 100 can be identified by the position of the target area 101 in the display module 100. For example, it can be represented as (x, y), where x represents the row in the array and y represents the column in the entire column. Based on this, it can be considered that each light point 10 contained in each target area 101 can be represented accordingly, and light points 10 displaying the same color can also be distinguished according to their position.

[0072] That is, the light points 10 set in a single target area 101 may not be arranged in an array, but rather all the light points 10 set in the target area 101 are arranged in an array with all the light points 10 set in other target areas 101.

[0073] It should be added that the target area 101 in the display module 100 can be arranged in other ways, for example, in a circular or annular structure. That is, the lamp points 10 provided in the target area 101 can also be arranged in other ways in the display module 100. In this embodiment, the arrangement of multiple lamp points 10 in an array is described.

[0074] It should be noted that the explanation of the setting position and arrangement of the light points 10 using the target area 101 is only one example.

[0075] Due to factors such as manufacturing processes and environmental conditions, the display module 100 may contain defects, leading to an increased defect rate in the finished product. Currently, visual defect inspection and illumination testing of the aforementioned display module 100 require two separate processes, resulting in long inspection times and low efficiency. Visual inspection can be achieved using AOI (Automated Optical Inspection) equipment, while optical defect inspection can be performed using illumination testing equipment. However, both AOI and illumination testing equipment require two workstations, consuming significant space; furthermore, each requires its own acquisition equipment, leading to high hardware costs.

[0076] Please see Figure 3 , Figure 3 This is a flowchart illustrating an embodiment of the display module detection method provided by the present invention.

[0077] To address the aforementioned issues, this application provides a method for detecting a display module, which specifically includes the following steps.

[0078] S1: Based on preset grayscale data, control the display module to be tested to be lit up; the display module to be tested includes multiple light points arranged in an array.

[0079] S2: Obtain the display image of the display module to be detected when it is lit up as the image to be detected.

[0080] S3: Detect the image to be detected and obtain the detection information of each light point; the detection information includes optical data and appearance data.

[0081] S4: Based on the detection information of the light points, perform optical defect detection and appearance defect detection to obtain the detection results of the display module to be tested.

[0082] The display module detection method provided in this embodiment acquires a display image of the display module under test in a lit state under preset grayscale data. This facilitates the simultaneous acquisition of optical and appearance data of each lamp point in the display module under test from the display image, shortening the data acquisition time. Based on the optical and appearance data of the lamp points, optical defect detection and appearance defect detection can be quickly achieved, improving the defect detection efficiency of the display module. Moreover, compared with the prior art, it also reduces the cost of the detection equipment.

[0083] Specifically, the specific implementation method of controlling the display module to be detected to be lit up based on preset grayscale data in step S1 is as follows.

[0084] In one embodiment, the display module to be tested can be any type of light panel such as a liquid crystal display (LCD), a light-emitting diode (LED), an organic light-emitting diode (OLED), or a mini light-emitting diode (miniLED). Alternatively, the display module to be tested can also be a cabinet or display screen composed of multiple light panels.

[0085] Understandably, if the display module to be tested is not lit up, i.e., it is in an off state, then the optical defects of the display module to be tested will not be highlighted. The optical defects of the display module to be tested need to be detected in other processes, resulting in low detection efficiency.

[0086] In view of the above-mentioned potential problems, in this embodiment of the application, the display module to be tested can be controlled to be lit up, so that the appearance defects and optical defects of the display module to be tested can be more obviously presented, thereby improving the defect detection efficiency of the display module to be tested.

[0087] In one embodiment, the preset grayscale data is less than the highest grayscale level in the entire grayscale range and greater than the lowest grayscale level in the entire grayscale range. The entire grayscale range refers to grayscale levels 0 to 255. The highest grayscale level in the entire grayscale range is 255, and the lowest grayscale level in the entire grayscale range is 0. Therefore, the value range of the preset grayscale data w is 0 < w < 255.

[0088] In one embodiment, the preset grayscale data is smaller than a specific grayscale range, the highest grayscale level p in the specific grayscale range is smaller than the highest grayscale level in the entire grayscale range, and the lowest grayscale level q in the specific grayscale range is not smaller than the lowest grayscale level in the entire grayscale range. That is, the specific grayscale range p is greater than q, p < 255, and q ≥ 0. Since the preset grayscale data is smaller than the highest grayscale level in the specific grayscale range and not smaller than the lowest grayscale level in the specific grayscale range, the value range of the preset grayscale data w is 0 ≤ w < p. For example, the value range of the preset grayscale data w can be 0 ≤ w ≤ 128, 10 ≤ w ≤ 150, 0 ≤ w ≤ 175, or 20 ≤ w ≤ 185, etc. The value of the preset grayscale data w can be 30, 50, 70, 90, 100, 120, 140, 160, 180, 190, 210, 230, or 250, etc. The preset grayscale data w is set according to the actual situation so that the display image presented by the display module under test can highlight the appearance and optical features. Specifically, to improve the quality of the displayed image, the preset grayscale data value is greater than 0 and less than 128.

[0089] Here, grayscale and brightness are linearly related; the larger the preset grayscale data, the higher the display brightness of the display module to be tested.

[0090] The system uses multiple LEDs to display various colors, including at least red, green, and blue. When all red, green, and blue LEDs in the module under test are lit, the module displays white light; when only all red LEDs are lit, the module displays red light; when only all green LEDs are lit, the module displays green light; and when only all blue LEDs are lit, the module displays blue light.

[0091] In one possible embodiment, the display module under test can be controlled to be lit by a lighting system. Specifically, this lighting system can be used to control the lighting or extinguishing of the display module under test. When it is necessary to light up the display module under test, the terminal device can send a lighting command to the lighting system to instruct it to control the display module under test to be lit.

[0092] Specifically, the specific implementation method for obtaining the display image of the display module to be detected in the lit state as the image to be detected in step S2 is as follows.

[0093] In one embodiment, an image acquisition device captures images of at least some of the LEDs on the display module to be tested when they are lit, thereby obtaining an image of the display module to be tested. The display module to be tested is located at the target viewing angle of the image acquisition device. The target viewing angle can be a normal viewing angle, a 30° tilted viewing angle, a 45° tilted viewing angle, a 60° tilted viewing angle, a 50° tilted viewing angle, etc., and is specifically set according to the actual situation.

[0094] Specifically, when only all red LEDs on the display module under test are lit, the image to be tested corresponding to the display module under test is a red-light image; when only all green LEDs on the display module under test are lit, the image to be tested corresponding to the display module under test is a green-light image; when only all blue LEDs on the display module under test are lit, the image to be tested corresponding to the display module under test is a blue-light image; and when all green, green, and blue LEDs on the display module under test are lit, the image to be tested corresponding to the display module under test is a white-light image.

[0095] In one embodiment, in order to facilitate the detection of all the light points in the display module to be tested, a white display image of all the light points on the display module to be tested with all the light points lit is captured to obtain the image to be tested corresponding to the display module to be tested.

[0096] In one specific embodiment, when the image to be detected captured by the image acquisition device does not represent the entire surface of the display module to be detected, the image acquisition device, possessing high-speed moving shooting capabilities along the x and y axes, can be controlled to acquire local images of corresponding positions of the display module to be detected as it moves sequentially along the x and y axes. In another specific embodiment, the image acquisition device can be kept stationary while the display module to be detected moves sequentially along the x and y axes, acquiring local images of corresponding positions of the display module to be detected during this movement. By performing local acquisition of the display module to be detected, the camera surface distortion of the image to be detected is essentially eliminated, and the acquisition accuracy of the image to be detected is improved.

[0097] Once the entire surface of the display module under test has been captured, all the local images are stitched together to obtain the test image of the display module. In other words, the display module under test has a single test image. Alternatively, each local image can be used as the test image of the display module.

[0098] In one specific embodiment, a supplementary lighting device can provide preset illumination to the image acquisition device when capturing the image to be tested, thereby optimizing the brightness and clarity of the image acquisition device during imaging. The positions of the supplementary lighting device and the image acquisition device are relatively fixed. Specifically, the supplementary lighting device is positioned on the side of the image acquisition device facing the display module to be tested, facilitating the provision of a light source.

[0099] Specifically, the specific implementation method for detecting the image to be detected in step S3 to obtain the detection information of each light point is as follows.

[0100] The image to be inspected is subjected to lamp detection to obtain the position information, optical data, and appearance data of each lamp in the image. The optical data includes at least one of luminance data and chromaticity data. The appearance data includes at least one of chromaticity data, grayscale data, and edge data.

[0101] In this step, the optical data and appearance data of the light points can be obtained simultaneously by detecting one image corresponding to the display module to be tested.

[0102] Please see Figure 4 , Figure 4 This is the present invention. Figure 3 A flowchart illustrating a specific embodiment of step S4 in the provided method for detecting display modules.

[0103] Specifically, the specific implementation method for obtaining the detection result of the display module to be tested by performing optical defect detection and appearance defect detection based on the detection information of the lamp points in step S4 is as follows.

[0104] S41: Perform optical defect detection based on the optical data of the light spot to obtain the first detection result of the light spot.

[0105] In some embodiments, the optical data of each lamp point is compared with an optical data threshold to determine the optical difference value between the optical data of the lamp point and the optical data threshold; based on the optical difference value of the lamp point, it is determined whether there is an optical defect at the lamp point.

[0106] In response to the presence of optical defects in the light spot, the optical detection category of the light spot is determined based on the optical difference value of the light spot; the optical detection category of the light spot and the position information of the light spot are fused together as the first detection result of the light spot.

[0107] In one embodiment, the brightness data of the light point is compared with a brightness threshold. If the brightness data of the light point meets the brightness threshold, it is determined that the brightness of the light point is normal; if the brightness data of the light point does not meet the brightness threshold, it is determined that the brightness data of the light point has a brightness defect.

[0108] The chromaticity data of the light point is compared with the chromaticity threshold. If the chromaticity data of the light point meets the chromaticity threshold, the chromaticity of the light point is determined to be normal. If the chromaticity data of the light point does not meet the chromaticity threshold, the light point is determined to have a color deviation defect.

[0109] In one embodiment, if the brightness data of a light point is greater than a brightness threshold, it is determined that the light point has a lighting defect; if the brightness data of a light point is less than the brightness threshold, the brightness difference value between the brightness data of the light point and the brightness threshold is calculated. If the brightness difference value corresponding to the light point is greater than a preset brightness, it is determined that the light point has an excessively dim defect; if the brightness difference value corresponding to the light point is less than the preset brightness, it is determined that the light point has a dead light defect. The preset brightness is less than the brightness threshold. For example, the preset brightness can be zero.

[0110] If the brightness and color of the light point are normal, then the light point is considered to be normal.

[0111] The optical inspection categories for lamp points include at least one of the following: lamp point normal, color deviation defect, bright lamp defect, dark lamp defect, and dead lamp defect.

[0112] The location information corresponding to the light point and the optical detection category are combined as the first detection result of the light point.

[0113] In one embodiment, all light points are traversed, and each light point is selected as a candidate light point. The optical data of the candidate light points are compared with the optical data of each light point within a preset area to determine the first detection result of the light point. The preset area is the region within a preset distance range centered on the candidate light point.

[0114] S42: Perform appearance defect detection based on the appearance data of the light spot to obtain the second detection result of the light spot.

[0115] In some embodiments, the appearance data of the light point is compared with preset intervals in the database. If the appearance data of the light point falls within a preset interval, the preset detection result corresponding to that interval is determined as the appearance detection category of the light point. The appearance detection category and the location information of the light point are then fused to form a second detection result for the light point.

[0116] The appearance inspection categories include at least one of the following: defects in the adhesive coating of the lamp dots, misalignment of the lamp dots, scratches on the surface of the lamp dots, dirt on the surface of the lamp dots, and defects at the edges and corners of the lamp beads.

[0117] The location information corresponding to the light point and the appearance inspection category are combined as the second inspection result of the light point.

[0118] S43: Based on the first and second detection results corresponding to the light points with the same location information, determine the detection result of the display module to be detected.

[0119] In some embodiments, in response to the optical detection category being a first preset category in the first detection result corresponding to the lamp point, the first detection result corresponding to the lamp point is taken as the detection result of the display module to be tested; the first preset category includes at least one of color shift defect, bright lamp defect, dark lamp defect, and dead lamp defect.

[0120] In some embodiments, in response to the appearance inspection category of the second detection result corresponding to the light point being a second preset category, the second detection result corresponding to the light point is taken as the detection result of the display module to be inspected; the second preset category includes at least one of the following: light point adhesive defects, light point misalignment, light point surface scratches, lamp bead corner defects, light point misalignment, polarity reversal, light point missing, presence of foreign matter at the light point, light point dirt, and light point sideways movement.

[0121] In one embodiment, the above method can be used to detect only the appearance defects or optical defects of the display module to be tested, or it can be used to detect both appearance defects and optical defects of the display module to be tested simultaneously. By acquiring a white light-displaying image of the display module to be tested, both optical defect detection and appearance defect detection of the display module to be tested can be completed at one time, thereby speeding up the detection process. Alternatively, either one can be selected for detection, providing high flexibility.

[0122] Please see Figure 5 , Figure 5 This is a schematic diagram of the framework of an embodiment of the detection device for display modules provided by the present invention.

[0123] To address the aforementioned issues, this application also provides a display module detection device 50, which implements the display module detection method described in the above embodiments. The display module detection device 50 includes a control module 51, a data acquisition module 52, a feature detection module 53, and a defect detection module 54.

[0124] The control module 51 is used to control the display module under test to be lit up based on preset grayscale data; the display module under test includes multiple light points arranged in an array.

[0125] The acquisition module 52 is used to acquire the display image of the display module under test when it is lit up as the image to be tested.

[0126] The feature detection module 53 is used to detect the image to be detected and obtain the detection information of each light point; the detection information includes optical data and appearance data.

[0127] The defect detection module 54 is used to perform optical defect detection and appearance defect detection based on the detection information of the light points, and obtain the detection results of the display module to be inspected.

[0128] The display module detection device provided in this embodiment acquires a display image of the display module under test in a lit state under preset grayscale data. This facilitates the simultaneous acquisition of optical and appearance data of each lamp point in the display module under test from the display image, shortening the data acquisition time. Based on the optical and appearance data of the lamp points, optical defect detection and appearance defect detection can be quickly realized, improving the defect detection efficiency of the display module. Moreover, compared with the prior art, it also reduces the cost of the detection equipment.

[0129] Please see Figure 6 , Figure 6 This is a schematic diagram of the framework of an embodiment of the detection device for display modules provided by the present invention.

[0130] To address the aforementioned issues, this application also provides a display module testing device 60, which implements the display module testing method described in the above embodiments. The display module testing device 60 specifically includes an acquisition station 61, an image acquisition device 62, and a controller 63.

[0131] The acquisition station 61 is used to place the display module to be tested; the display module to be tested includes multiple light points arranged in an array.

[0132] The image acquisition device 62 is used to capture images of the display module to be tested placed on the acquisition station 61 as the images to be tested; the acquisition station 61 is located at the target viewing angle of the image acquisition device 62. The image acquisition device 62 can be a high-precision camera lens. The target viewing angle can be a normal viewing angle, a 30° tilted viewing angle, a 45° tilted viewing angle, a 60° tilted viewing angle, a 50° tilted viewing angle, etc., and can be set according to the actual situation.

[0133] The controller 63 is connected to the acquisition station 61 and the image acquisition device 62 by signal. It is used to control the display module to be tested to be lit up based on the preset grayscale data; to detect the image to be tested and obtain the detection information of each light point; the detection information includes optical data and appearance data; and to perform optical defect detection and appearance defect detection based on the detection information of the light points to obtain the detection result of the display module to be tested.

[0134] In one embodiment, the detection device 60 for the display module further includes a supplementary lighting device 64.

[0135] The supplementary lighting device 64 is signal-connected to the controller 63 and is set at a preset position on the image acquisition device 62 to provide preset illumination when the image acquisition device 62 acquires the image to be detected. The supplementary lighting device 64 is positioned on the side of the image acquisition device 62 closer to the acquisition station to provide better illumination.

[0136] The image acquisition device 62 is at least one set, or multiple sets forming an array. The supplementary lighting device 64 is at least one set, or multiple sets forming an array. The image acquisition device 62 and the supplementary lighting device 64 are used together to improve the image clarity and brightness of the image to be detected. The specific settings are determined according to the actual situation.

[0137] The display module testing device provided in this embodiment acquires a display image of the display module under test in a lit state under preset grayscale data. This facilitates the simultaneous acquisition of optical and appearance data of each lamp point in the display module under test from the display image, shortening the data acquisition time. Based on the optical and appearance data of the lamp points, optical defect detection and appearance defect detection can be quickly achieved, improving the defect detection efficiency of the display module. Moreover, compared with the prior art, it also reduces the cost of the testing device.

[0138] Please see Figure 7 , Figure 7 This is a schematic diagram of the framework of an embodiment of the detection system for display modules provided by the present invention.

[0139] To address the aforementioned issues, this application also provides a display module detection system 70, which includes the display module detection device 60 described in the above embodiments.

[0140] The display module testing system 70 uses a single testing station and a set of supplementary lighting devices. The display module testing equipment 60 has a small overall size, occupies less space, and reduces equipment and maintenance costs.

[0141] The display module detection system provided in this embodiment can simultaneously detect optical defects and appearance defects in the display module under test, thereby improving the defect detection efficiency of the display module; and compared with the prior art, it also reduces the cost of the detection equipment.

[0142] Please see Figure 8 , Figure 8 This is a schematic diagram of a framework of an embodiment of the electronic terminal provided by the present invention. The electronic terminal 80 includes a memory 81 and a processor 82 coupled to each other. The processor 82 is used to execute program instructions stored in the memory 81 to implement the steps of any of the above-described display module detection method embodiments. In a specific implementation scenario, the electronic terminal 80 may include, but is not limited to, a microcomputer or a server. In addition, the electronic terminal 80 may also include mobile devices such as laptops and tablets, which are not limited here.

[0143] Specifically, processor 82 controls itself and memory 81 to implement the steps of the detection method embodiment for any of the above-described display modules. Processor 82 can also be referred to as a CPU (Central Processing Unit). Processor 82 may be an integrated circuit chip with signal processing capabilities. Processor 82 can also be a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor can be a microprocessor or any conventional processor. Furthermore, processor 82 can be implemented using integrated circuit chips.

[0144] Please see Figure 9 , Figure 9 This is a schematic diagram of a framework of an embodiment of a computer-readable storage medium provided by the present invention. The computer-readable storage medium 90 stores program instructions 901 that can be executed by a processor. The program instructions 901 are used to implement the steps of any of the above-described embodiments of the detection method for display modules.

[0145] In some embodiments, the functions or modules of the apparatus provided in this disclosure can be used to perform the methods described in the above method embodiments. The specific implementation can be referred to the description of the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0146] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed methods and apparatus can be implemented in other ways. For example, the apparatus implementations described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0148] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0149] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0150] The above are merely embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A method for detecting a display module, characterized in that, The method includes: The display module to be tested is controlled to be lit up based on preset grayscale data; the display module to be tested includes multiple light points arranged in an array. The display image of the display module to be detected in the lit state is obtained as the image to be detected; The image to be detected is inspected to obtain detection information for each of the light points; the detection information includes optical data and appearance data. Based on the detection information of the light points, optical defect detection and appearance defect detection are performed to obtain the detection result of the display module to be tested.

2. The detection method for the display module according to claim 1, characterized in that, The step of acquiring the display image of the display module to be detected in the lit state as the image to be detected includes: An image acquisition device is used to capture images of at least some of the light points on the display module under test in the lit state, thereby obtaining the image to be tested corresponding to the display module under test; wherein the display module under test is located at the target viewing angle of the image acquisition device.

3. The detection method for the display module according to claim 2, characterized in that, The plurality of light points are used to display a variety of colors, the variety of colors including at least red, green and blue; The step of acquiring the display image of the display module to be detected in the lit state as the image to be detected includes: A white display image of all the light points on the display module to be tested in the lit state is captured to obtain the image to be tested corresponding to the display module to be tested.

4. The detection method for the display module according to any one of claims 1 to 3, characterized in that, The detection information of the light point also includes the position information of the light point; The optical defect detection and appearance defect detection based on the detection information of the light points are used to obtain the detection result of the display module to be tested, including: Optical defect detection is performed based on the optical data of the light point to obtain the first detection result of the light point; Based on the appearance data of the light spot, an appearance defect detection is performed to obtain a second detection result for the light spot; Based on the first detection result and the second detection result corresponding to the light point having the same location information, the detection result of the display module to be detected is determined.

5. The detection method for the display module according to claim 4, characterized in that, The optical data includes at least one of luminance data and chromaticity data; The optical defect detection based on the optical data of the light point, to obtain the first detection result of the light point, includes: The optical data of each lamp point is compared with the optical data threshold to determine the optical difference value between the optical data of the lamp point and the optical data threshold; Based on the optical difference values ​​of the light points, determine whether the light points have optical defects; In response to the presence of an optical defect in the light spot, the optical detection category of the light spot is determined based on the optical difference value of the light spot; The optical detection category and the location information of the light point are fused together to form the first detection result of the light point.

6. The detection method for the display module according to claim 4, characterized in that, The appearance data includes at least one of chromaticity data, grayscale data, and edge data; The step of performing appearance defect detection based on the appearance data of the light spot to obtain a second detection result for the light spot includes: The appearance data of the light points are compared with each preset interval in the database; If the appearance data of the light spot is within the preset range, then the preset detection result corresponding to the preset range is determined as the appearance detection category of the light spot; The appearance detection category and the location information of the light point are fused together to form the second detection result of the light point.

7. The detection method for the display module according to claim 4, characterized in that, The determination of the detection result of the display module to be detected based on the first detection result and the second detection result corresponding to the light points having the same location information includes: If the optical detection category in the first detection result corresponding to the light point is a first preset category, then the first detection result corresponding to the light point is taken as the detection result of the display module to be tested; the first preset category includes at least one of color shift defect, bright light defect, dark light defect, and dead light defect; And / or, in response to the second detection result corresponding to the light point having an appearance inspection category of a second preset category, the second detection result corresponding to the light point is taken as the detection result of the display module to be inspected; the second preset category includes at least one of the following: light point adhesive defects, light point misalignment, light point surface scratches, light point dirt, LED bead edge defects, light point misalignment, polarity reversal, light point omission, presence of foreign objects in the light point, and light point sideways movement.

8. The detection method for the display module according to claim 1, characterized in that, The preset grayscale data has a value greater than 0 and less than 128.

9. A detection device for a display module, characterized in that, The detection device for the display module includes: The control module is used to control the display module under test to be lit up based on preset grayscale data; the display module under test includes multiple light points arranged in an array. The acquisition module is used to acquire the display image of the display module to be detected in the lit state as the image to be detected; The feature detection module is used to detect the image to be detected and obtain detection information for each of the light points; the detection information includes optical data and appearance data; The defect detection module is used to perform optical defect detection and appearance defect detection based on the detection information of the light points, and obtain the detection result of the display module to be tested.

10. An electronic terminal, characterized in that, The device includes a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the detection method for the display module as described in any one of claims 1 to 8.

11. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the detection method for the display module as described in any one of claims 1 to 8.

12. A testing device for a display module, characterized in that, The testing equipment for the display module includes: The data acquisition station is used to place the display module to be tested; the display module to be tested includes multiple light points arranged in an array. An image acquisition device is used to acquire an image of the display module to be tested placed on the acquisition station as the image to be tested; the acquisition station is located at the target viewing angle of the image acquisition device; The controller is signal-connected to the acquisition station and the image acquisition device, and is used to control the display module to be tested to be lit up based on preset grayscale data; to detect the image to be tested and obtain the detection information of each of the light points; the detection information includes optical data and appearance data; and is also used to perform optical defect detection and appearance defect detection based on the detection information of the light points to obtain the detection result of the display module to be tested.

13. The testing equipment for the display module according to claim 12, characterized in that, Also includes: A supplementary lighting device is connected to the controller signal and is set at a preset position of the image acquisition device to provide preset illumination when the image acquisition device acquires the image to be detected.

14. A detection system for a display module, characterized in that, The detection system for the display module includes the detection equipment for the display module as described in claim 12 or 13 above.

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