Optical detection method, device and system and computer readable storage medium

Abstract

The invention relates to an optical detection method, device and system and a computer readable storage medium, and is used for detecting optical crosstalk of a miniature light-emitting device array, the miniature light-emitting device array comprises a plurality of light-emitting pixel groups, and each light-emitting pixel group comprises a plurality of light-emitting pixels which are linearly arranged; the method comprises the following steps: when only a target light-emitting pixel group in a plurality of light-emitting pixel groups included in a micro light-emitting device array is lightened, shooting the plurality of light-emitting pixel groups to obtain a target group lightening image; determining brightness distribution information in an optical crosstalk detection area of the target group lightening image; the light crosstalk detection result of the micro light-emitting device array is determined according to the brightness distribution information, so that in the shooting process of the plurality of light-emitting pixel groups, due to the fact that the plurality of light-emitting pixels included in the target light-emitting pixel group are linearly arranged, it can be ensured that at least part of all the lighted light-emitting pixels are located on the same focal plane, and the shooting efficiency is improved. An optical crosstalk detection error caused by focusing is reduced, so that the accuracy of an optical crosstalk detection result is improved.

Description

Technical Field

[0001] The present application relates to the field of semiconductor light-emitting technologies, and particularly to an optical detection method, device, system, and computer-readable storage medium. Background Art

[0002] A micro light-emitting device array, which is a micro LED (Micro / Mini-Light Emitting Diode, MLED) or micro OLED (Micro-organic Light Emitting Diode, MOLED) array, refers to an array of highly integrated high-density micro-sized light-emitting devices after miniaturization, thinning, and arraying of LEDs / OLEDs. The micro light-emitting device array is widely used in fields such as augmented reality (AR) and extended reality (XR) due to its excellent performance, and these fields have extremely high requirements for display clarity. In the micro light-emitting device array, light crosstalk between pixels becomes a key factor affecting display clarity.

[0003] However, in the prior art, the light crosstalk detection method for the micro light-emitting device array has the problem of low accuracy of the light crosstalk detection result. Summary of the Invention

[0004] The purpose of the present application is to provide an optical detection method, device, system, and computer-readable storage medium to improve the accuracy of the light crosstalk detection result of the micro light-emitting device array.

[0005] An embodiment of the present application provides an optical detection method, which is used to detect the light crosstalk of a micro light-emitting device array. The micro light-emitting device array includes a plurality of light-emitting pixel groups arranged in sequence along a first direction. Each light-emitting pixel group includes a plurality of light-emitting pixels arranged linearly along a second direction, and the first direction intersects the second direction. The optical detection method includes: when only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array is lit, photographing the plurality of light-emitting pixel groups included in the micro light-emitting device array to obtain a target group lit image; determining the brightness distribution information within the light crosstalk detection region of the target group lit image; and determining the light crosstalk detection result of the micro light-emitting device array according to the brightness distribution information.

[0006] Wherein, before determining the brightness distribution information within the light crosstalk detection region of the target group lit image, the optical detection method further includes: determining the light crosstalk detection region from the target group lit image. The light crosstalk detection region includes the region where the photographed image of the target light-emitting pixel group is located and the regions where the photographed images of at least one affected light-emitting pixel group adjacent to the target light-emitting pixel group are located. The affected light-emitting pixel group is a light-emitting pixel group among the plurality of light-emitting pixel groups that is affected by the light crosstalk of the target light-emitting pixel group.

[0007] Among them, the target light-emitting pixel group corresponds to at least one pixel column in the target group lighting image; determining the optical crosstalk detection region in the target group lighting image includes: determining the lighting center pixel point of each target pixel row in the multiple target pixel rows of the target group lighting image, and the lighting center pixel point of each target pixel row is the pixel point with the largest brightness value in each target pixel row; according to a preset rule and the lighting center pixel point of each target pixel row, determining the optical crosstalk detection pixel group of each target pixel row, and the optical crosstalk detection pixel group of each target pixel row is composed of multiple pixel points that are arranged adjacent to each other in sequence and include the lighting center pixel point in each target pixel row, and the region where the optical crosstalk detection pixel groups of all target pixel rows in the target group lighting image are located is the optical crosstalk detection region.

[0008] Among them, the target light-emitting pixel group corresponds to at least one pixel column in the target group lighting image; determining the brightness distribution information in the optical crosstalk detection region of the target group lighting image includes: determining the average brightness distribution curve in the optical crosstalk detection region of the target group lighting image, and the average brightness distribution curve is used to characterize the correspondence between the pixel positions of each pixel column along the row direction of the target column lighting image in the optical crosstalk detection region and the average value of the brightness values of all pixel points in each pixel column in the optical crosstalk detection region; according to the brightness distribution information, determining the optical crosstalk detection result of the micro light-emitting device array includes: determining the optical crosstalk detection result of the micro light-emitting device array according to the average brightness distribution curve.

[0009] Among them, determining the average brightness distribution curve in the optical crosstalk detection region of the target group lighting image includes: determining the brightness distribution curve of each pixel row in the optical crosstalk detection region of the target group lighting image, and the brightness distribution curve of each pixel row in the optical crosstalk detection region is used to characterize the correspondence between the pixel positions of each pixel point along the row direction of the target column lighting image in each pixel row in the optical crosstalk detection region and the brightness values of each pixel point in each pixel row in the optical crosstalk detection region; taking the average value of the brightness distribution curves of all pixel rows in the optical crosstalk detection region to obtain the average brightness distribution curve.

[0010] Among them, according to the average brightness distribution curve, determining the optical crosstalk detection result of the micro light-emitting device array includes: determining the region corresponding to the target light-emitting pixel column in the average brightness distribution curve as the lighting region; calculating the curve area in the lighting region and the curve area in other regions of the average brightness distribution curve except the lighting region; determining the optical crosstalk detection result of the micro light-emitting device array according to the curve area in the lighting region and the curve area in other regions.

[0011] Among them, calculating the curve area within the illuminated area and the curve area within other areas except the illuminated area of the average brightness distribution curve includes: calculating the curve area within the illuminated area and the curve area within other areas except the illuminated area of the average brightness distribution curve by means of gradient integration.

[0012] Among them, the optical detection method is applied to an optical detection system, and the optical detection system includes an integrated driving board, a micro imager, a computer, and a micro light-emitting device array. Among them, the integrated driving board is configured to control the display screen and brightness of the micro light-emitting device array, the micro imager is configured to photograph the light-emitting side of the micro light-emitting device array, and the computer is configured to perform data processing on the image obtained by the micro imager to achieve the detection of optical crosstalk of the micro light-emitting device array; and, the optical detection method specifically includes: controlling, through the integrated driving board, the micro light-emitting device array to display a preset screen so that only the target light-emitting pixel group among the multiple light-emitting pixel groups included in the micro light-emitting device array is illuminated; when only the target light-emitting pixel group among the multiple light-emitting pixel groups included in the micro light-emitting device array is illuminated, photographing, through the micro imager, the multiple light-emitting pixel groups included in the micro light-emitting device array to obtain a target group illumination image; determining, through the computer, the brightness distribution information within the optical crosstalk detection area of the target group illumination image, and determining the optical crosstalk detection result of the micro light-emitting device array according to the brightness distribution information.

[0013] The embodiment of the present application further provides an optical detection device, which is used to detect the optical crosstalk of a micro light-emitting device array and is applied to an optical detection system. The optical detection system includes an integrated driving board, a microscopic imager, a computer, and a micro light-emitting device array. Among them, the integrated driving board is configured to control the display screen and brightness of the micro light-emitting device array, the microscopic imager is configured to capture the light-emitting side of the micro light-emitting device array, and the computer is configured to perform data processing on the image captured by the microscopic imager to achieve the detection of the optical crosstalk of the micro light-emitting device array; the micro light-emitting device array includes a plurality of light-emitting pixel groups arranged in sequence along a first direction, and each light-emitting pixel group includes a plurality of light-emitting pixels arranged linearly along a second direction, and the first direction intersects the second direction; the optical detection device includes: an acquisition module, which is used to control the micro light-emitting device array to display a preset screen through the integrated driving board, so that only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array is lit, and when only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array is lit, capture the plurality of light-emitting pixel groups included in the micro light-emitting device array through the microscopic imager to obtain a target group lit image; a first determination module, which is used to determine the brightness distribution information in the optical crosstalk detection area of the target group lit image through the computer; a second determination module, which is used to determine the optical crosstalk detection result of the micro light-emitting device array through the computer according to the brightness distribution information.

[0014] Among them, the optical detection device further includes: a third determination module, which is used to determine the optical crosstalk detection area from the target group lit image through the computer. The optical crosstalk detection area includes the area where the captured image of the target light-emitting pixel group is located and the areas where the captured images of at least one affected light-emitting pixel group adjacent to the target light-emitting pixel group are located. The affected light-emitting pixel group is a light-emitting pixel group among the plurality of light-emitting pixel groups that is affected by the optical crosstalk of the target light-emitting pixel group.

[0015] Among them, the target light-emitting pixel group corresponds to at least one pixel column in the target group lit image; the third determination module includes: a first determination unit, which is used to determine the lit center pixel point of each target pixel row in the plurality of target pixel rows of the target group lit image through the computer. The lit center pixel point of each target pixel row is the pixel point with the largest brightness value in each target pixel row; a second determination unit, which is used to determine the optical crosstalk detection pixel group of each target pixel row through the computer according to a preset rule and the lit center pixel point of each target pixel row. The optical crosstalk detection pixel group of each target pixel row is composed of a plurality of pixel points that are adjacent to each other in sequence and include the lit center pixel point in each target pixel row, and the area where the optical crosstalk detection pixel groups of all target pixel rows in the target group lit image are located is the optical crosstalk detection area.

[0016] Among them, the target light-emitting pixel group corresponds to at least one pixel column in the target group lighting image; when the first determination module executes to determine the brightness distribution information in the optical crosstalk detection area of the target group lighting image, it specifically executes: determining, by a computer, the average brightness distribution curve in the optical crosstalk detection area of the target group lighting image, where the average brightness distribution curve is used to represent the correspondence between the pixel positions of each pixel column in the optical crosstalk detection area along the row direction of the target column lighting image and the average value of the brightness values of all pixel points in each pixel column in the optical crosstalk detection area; when the second determination module executes to determine the optical crosstalk detection result of the micro light-emitting device array according to the brightness distribution information, it specifically executes: determining, by a computer, the optical crosstalk detection result of the micro light-emitting device array according to the average brightness distribution curve.

[0017] Among them, the first determination module includes: a third determination unit, configured to determine, by a computer, the brightness distribution curve of each pixel row in the optical crosstalk detection area of the target group lighting image, where the brightness distribution curve of each pixel row in the optical crosstalk detection area is used to represent the correspondence between the pixel positions of each pixel point in each pixel row in the optical crosstalk detection area along the row direction of the target column lighting image and the brightness values of each pixel point in each pixel row in the optical crosstalk detection area; an averaging unit, configured to average, by a computer, the brightness distribution curves of all pixel rows in the optical crosstalk detection area to obtain the average brightness distribution curve.

[0018] Among them, the second determination module includes: a fourth determination unit, configured to determine, by a computer, the area corresponding to the target light-emitting pixel column in the average brightness distribution curve as the lit area; a calculation unit, configured to calculate, by a computer, the curve area within the lit area and the curve area in other areas of the average brightness distribution curve except the lit area; a fifth determination unit, configured to determine, by a computer, the optical crosstalk detection result of the micro light-emitting device array according to the curve area within the lit area and the curve area in other areas.

[0019] Among them, when the calculation unit executes to calculate the curve area within the lit area and the curve area in other areas of the average brightness distribution curve except the lit area, it specifically executes: calculating, by a computer, the curve area within the lit area and the curve area in other areas of the average brightness distribution curve except the lit area by using the method of gradient integration.

[0020] An embodiment of the present application also provides an optical detection system, which includes a micro light-emitting device array, an integrated driving board, a microscopic imager, and a computer. Among them, the integrated driving board is configured to control the display screen and brightness of the micro light-emitting device array, the microscopic imager is configured to photograph the light-emitting side of the micro light-emitting device array, and the computer is configured to perform data processing on the image obtained by the microscopic imager to implement the optical crosstalk detection of the micro light-emitting device array. Moreover, the optical detection device of any one of the above is integrated in the computer.

[0021] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program, and the computer program is adapted to be loaded by a processor to execute the optical detection method of any one of the above.

[0022] The beneficial effects of the present application are as follows: For the optical detection method, device, system, and computer-readable storage medium provided by the present application, when only the target light-emitting pixel group is lit among the multiple light-emitting pixel groups included in the micro light-emitting device array, the multiple light-emitting pixel groups included in the micro light-emitting device array are photographed to obtain a target group lit image. Then, the brightness distribution information within the optical crosstalk detection region of the target group lit image is determined, and based on the brightness distribution information, the optical crosstalk detection result of the micro light-emitting device array is determined. Thus, during the process of photographing the multiple light-emitting pixel groups when only the target light-emitting pixel group is lit among the multiple light-emitting pixel groups of the micro light-emitting device array, since the multiple light-emitting pixels included in the target light-emitting pixel group are arranged linearly, it can be ensured that at least some of all the lit light-emitting pixels of the micro light-emitting device array are located on the same focal plane, and the unlit light-emitting pixels near each lit light-emitting pixel are also mostly located on the same focal plane as it. Based on this, the optical crosstalk detection can be performed only on the region where the micro light-emitting device array is in clear focus, so as to avoid the increase in optical crosstalk detection error caused by the blurring of individual lit light-emitting pixels during focusing. Therefore, it is possible to reduce the optical crosstalk detection error caused by focusing, thereby improving the accuracy of the optical crosstalk detection result. Description of the Drawings

[0023] The following will clearly show the technical solutions and other beneficial effects of the present application by describing the specific embodiments of the present application in detail with reference to the drawings.

[0024] Figure 1 is a schematic diagram of the scenario of the optical detection system provided by the embodiment of the present application;

[0025] Figure 2 is a schematic flowchart of the optical detection method provided by the embodiment of the present application;

[0026] Figure 3 is a schematic structural diagram of the micro light-emitting device array provided by the embodiment of the present application;

[0027] Figure 4 is another schematic flowchart of the optical detection method provided by the embodiments of the present application;

[0028] Figure 5 is another schematic flowchart of the optical detection method provided by the embodiments of the present application;

[0029] Figure 6 is a schematic structural diagram of the grayscale image provided by the embodiments of the present application;

[0030] Figure 7 is a schematic structural diagram of the average brightness distribution curve provided by the embodiments of the present application;

[0031] Figure 8 is a schematic diagram comparing the optical crosstalk before and after process improvement provided by the embodiments of the present application;

[0032] Figure 9 is a schematic structural diagram of the optical detection device provided by the embodiments of the present application. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0035] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0037] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0038] For the sake of easy understanding, first, the relevant concepts involved in the present application are introduced:

[0039] Optical crosstalk (crosstalk or crosstalk noise): is a common phenomenon in optical communication and display technologies. It refers to the unwanted interference of the optical signal on one channel or pixel with the signal on an adjacent channel or pixel.

[0040] At present, reports on the optical crosstalk of micro-light-emitting device arrays mainly focus on how to optimize the structure and shape of micro-light-emitting devices to improve optical crosstalk. For example, by adding a sidewall metal reflective layer to suppress optical crosstalk, shaping the light-emitting pattern of the emitted light, and by regulating the area or shape of the light-emitting area of the device to increase the effective usage area of the chip and eliminate the optical crosstalk problem of the device. However, there are various methods to improve optical crosstalk, but there is a lack of an effective and convenient means for detecting optical crosstalk.

[0041] In related technologies, for the method of detecting optical crosstalk of micro-light-emitting device arrays, a multi-position point test method is usually adopted, such as testing the brightness contrast at 5 positions or 9 positions. However, this method has the following problems, which affect the accuracy of the optical crosstalk detection result:

[0042] ① The multi-position point test requires that all test points be located on the same focal plane. However, during the focusing process, there may be individual test points that are blurred, thus increasing the optical crosstalk detection error. In addition, the contrast at different positions is susceptible to the influence of brightness uniformity, resulting in the optical crosstalk detection result being unable to objectively and truly reflect the optical crosstalk situation of the module.

[0043] ② The brightness contrast between different regions cannot directly reflect the crosstalk situation between pixels and pixels.

[0044] In view of the above problems, the embodiments of the present application provide an optical detection method, device, system and storage medium. When only the target light-emitting pixel group is lit among the multiple light-emitting pixel groups included in the micro-light-emitting device array, the multiple light-emitting pixel groups included in the micro-light-emitting device array are photographed to obtain a target group lit image, and then the brightness distribution information within the optical crosstalk detection region of the target group lit image is determined, and based on the brightness distribution information, the optical crosstalk detection result of the micro-light-emitting device array is determined. Thus, during the process of photographing the multiple light-emitting pixel groups when only the target light-emitting pixel group is lit among the multiple light-emitting pixel groups of the micro-light-emitting device array, since the multiple light-emitting pixels included in the target light-emitting pixel group are arranged linearly, it can be ensured that at least some of all the lit light-emitting pixels of the micro-light-emitting device array are located on the same focal plane, and the unlit light-emitting pixels near each lit light-emitting pixel are also mostly located on the same focal plane as it. Based on this, the optical crosstalk detection can be performed only on the in-focus region of the micro-light-emitting device array to avoid the problem that the optical crosstalk detection error increases due to the possible blurring of individual lit light-emitting pixels during the focusing process, thereby being able to reduce the optical crosstalk detection error caused by focusing and thus improving the accuracy of the optical crosstalk detection result.

[0045] The following will be described in detail with specific embodiments. It should be noted that the serial numbers of the following embodiments do not limit the preferred order of the embodiments.

[0046] Please refer toFigure 1 , Figure 1 This is a schematic diagram of the scenario of the optical detection system provided by the embodiments of the present application. The optical detection system may include any one of the optical detection devices provided by the embodiments of the present application, and the optical detection device may be specifically integrated in computer devices such as terminals or servers.

[0047] In a specific embodiment, as Figure 1 shown, the above optical detection system may specifically include a micro light-emitting device array 1, an integrated driving board 2, a micro imager 3, and a computer 4, and the above optical detection device is used to detect the optical crosstalk of the micro light-emitting device array 1 and may be specifically integrated in the computer 4. Among them, the micro light-emitting device array 1 includes a plurality of light-emitting pixel groups arranged in sequence along a first direction, and the light-emitting pixel group includes a plurality of light-emitting pixels arranged linearly along a second direction, and the first direction intersects the second direction. The integrated driving board 2 is connected to the micro light-emitting device array 1 and is configured to control the display screen and brightness of the micro light-emitting device array 1. The micro imager 3 is located on the light-emitting side of the micro light-emitting device array 1 and is configured to photograph the light-emitting side of the micro light-emitting device array 1. The computer 4 is connected to the micro imager 3 and is configured to obtain the image photographed by the micro imager 3 and perform data processing on the obtained image to achieve the optical crosstalk detection of the micro light-emitting device array 1.

[0048] In a possible application scenario, the process of performing optical crosstalk detection on the micro light-emitting device array 1 may include: controlling the micro light-emitting device array 1 to display a preset screen through the integrated driving board 2 so that only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array 1 is lit, and when only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array 1 is lit, photographing the plurality of light-emitting pixel groups included in the micro light-emitting device array 1 through the micro imager 3 to obtain a target group lit image. Then, the computer 4 may obtain the target group lit image photographed by the micro imager 3, determine the brightness distribution information within the optical crosstalk detection area of the target group lit image, and then determine the optical crosstalk detection result of the micro light-emitting device array 1 according to the brightness distribution information, thereby completing the optical crosstalk detection of the micro light-emitting device array 1. And because the plurality of light-emitting pixels included in the target light-emitting pixel group are arranged linearly, it can be ensured that at least some of all the lit light-emitting pixels of the micro light-emitting device array are located on the same focal plane, and the unlit light-emitting pixels near each lit light-emitting pixel are also mostly located on the same focal plane as it. Based on this, it is possible to perform optical crosstalk detection only on the area where the micro light-emitting device array is in focus clearly, so as to avoid the problem that the optical crosstalk detection error increases due to the blurring of individual lit light-emitting pixels during the focusing process, and thus can reduce the optical crosstalk detection error caused by focusing, thereby improving the accuracy of the optical crosstalk detection result.

[0049] Please refer to Figure 2 , Figure 2 which is a schematic flowchart of the optical detection method provided by an embodiment of the present application. This optical detection method is used to detect the optical crosstalk of the micro light-emitting device array 1. As Figure 3 shown, the micro light-emitting device array 1 includes a plurality of light-emitting pixel groups 10 arranged in sequence along the first direction X. The light-emitting pixel group 10 includes a plurality of light-emitting pixels P arranged linearly along the second direction Y. The first direction X intersects the second direction Y. For example, the first direction X and the second direction Y can be perpendicular to each other.

[0050] As Figure 2 shown, the specific process of this optical detection method can be as follows:

[0051] Step S101: When only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array is lit, take a picture of the plurality of light-emitting pixel groups included in the micro light-emitting device array to obtain a target group lit image.

[0052] Specifically, as Figure 3 shown, the above-mentioned target light-emitting pixel group can be one of the plurality of light-emitting pixel groups 10 arranged in sequence along the first direction X included in the above-mentioned micro light-emitting device array 1. For example, it can specifically be the light-emitting pixel group 10 in the middle among the plurality of light-emitting pixel groups 10 arranged in sequence along the first direction X included in the above-mentioned micro light-emitting device array 1; or, the above-mentioned target light-emitting pixel group can be at least two light-emitting pixel groups 10 arranged adjacent to each other in sequence along the first direction X among the plurality of light-emitting pixel groups 10 arranged in sequence along the first direction X included in the above-mentioned micro light-emitting device array 1. For example, it can specifically be at least two light-emitting pixel groups 10 in the middle and arranged adjacent to each other in sequence along the first direction X among the plurality of light-emitting pixel groups 10 arranged in sequence along the first direction X included in the above-mentioned micro light-emitting device array 1.

[0053] In some embodiments, as Figure 3 shown, the above-mentioned micro light-emitting device array 1 can include a plurality of light-emitting pixels P arranged in an array, and can have m rows of light-emitting pixels P and n columns of light-emitting pixels P, where m and n are both positive integers. And, in the micro light-emitting device array 1, each row of light-emitting pixels P or each column of light-emitting pixels P can correspond to a light-emitting pixel group 10.

[0054] In some examples, as Figure 3As shown, the above-mentioned micro-light-emitting device array 1 may have n columns of light-emitting pixels P, where n is a positive integer greater than 2, and each column of light-emitting pixels P may correspond to a light-emitting pixel group 10. Moreover, when n is odd, the (n + 1) / 2-th column of light-emitting pixels P may be the above-mentioned target light-emitting pixel group; when n is even, the n / 2-th column of light-emitting pixels P may be the above-mentioned target light-emitting pixel group.

[0055] In this embodiment, as Figure 3 shown, the above-mentioned micro-light-emitting device array 1 may include one or more micro-light-emitting devices, and each micro-light-emitting device may provide one or more light-emitting pixels P in the micro-light-emitting device array 1.

[0056] Exemplarily, the above-mentioned light-emitting pixel P may be a micro-light-emitting diode (Micro-Light Emitting Diode, Micro-LED), for example, a blue Micro-LED or a green Micro-LED, etc. Correspondingly, the above-mentioned micro-light-emitting device array 1 may specifically be a Micro-LED module.

[0057] In some embodiments, as Figure 4 shown, before the above-mentioned step S101, the above-mentioned optical detection method may further include:

[0058] Step S11: Control the micro-light-emitting device array to only light up the target light-emitting pixel group among the multiple light-emitting pixel groups it includes.

[0059] Specifically, as Figure 1 and Figure 3 shown, the above-mentioned optical detection device may control the above-mentioned micro-light-emitting device array 1 to display a preset picture through the integrated driving board 2, so that only the target light-emitting pixel group among the multiple light-emitting pixel groups 10 included in the micro-light-emitting device array 1 is lit. Among them, the integrated driving board 2 is connected to the micro-light-emitting device array 1 and can provide driving signals to each light-emitting pixel P in the micro-light-emitting device array 1 to drive each light-emitting pixel P in the micro-light-emitting device array 1 to light up. The preset picture includes multiple pixel points, which are divided into multiple groups. The multiple groups of pixel points correspond one-to-one to the multiple light-emitting pixel groups 10 included in the micro-light-emitting device array 1. Each pixel point within each group of pixel points corresponds one-to-one to each light-emitting pixel P within its corresponding light-emitting pixel group 10, and only one group of pixel points among the multiple groups of pixel points has a non-zero brightness value, so that when the micro-light-emitting device array 1 displays the preset picture, only the light-emitting pixels P in the target light-emitting pixel group (that is, the light-emitting pixel group 10 corresponding to the group of pixel points with a non-zero brightness value in the preset picture) are in the lit state, while the light-emitting pixels P in other light-emitting pixel groups 10 are all in the unlit state.

[0060] In some embodiments, asFigure 1 and Figure 3 As shown in Figure 3 , the above step S101 may specifically include: when only the target light-emitting pixel group among the multiple light-emitting pixel groups 10 included in the micro light-emitting device array 1 is lit, taking a picture of the multiple light-emitting pixel groups 10 included in the micro light-emitting device array 1 through the microscope imager 3 to obtain a target group lit image.

[0061] Specifically, an attenuation sheet (for example, a 1% attenuation sheet) may be integrated in the above microscope imager 3, and the above optical detection device may specifically take a picture of the multiple light-emitting pixel groups 10 included in the micro light-emitting device array 1 through the microscope imager 3 in the automatic exposure mode when only the target light-emitting pixel group among the multiple light-emitting pixel groups 10 included in the micro light-emitting device array 1 is lit, so as to obtain the above target group lit image.

[0062] It should be noted that by integrating an attenuation sheet in the above microscope imager 3, it is possible to prevent the automatic exposure time from being too short due to the too high brightness of the light-emitting pixel P (for example, a micro light-emitting diode), thereby avoiding the image flicker problem caused by the automatic exposure time being shorter than the refresh time of the micro light-emitting device array 1. In addition, the specific range of the automatic exposure time is not limited in this embodiment, and it is only necessary to ensure that the automatic exposure time is an integer multiple of the refresh time of the micro light-emitting device array 1. Among them, the micro light-emitting device array 1 is driven by the integrated driving board 2, and the refresh time of the micro light-emitting device array 1 refers to the refresh time of the integrated driving board 2. Exemplarily, the refresh frequency of the integrated driving board 2 is 60 Hz, and the refresh time is 16.6 ms. In other words, the integrated driving board 2 refreshes once every 16.6 ms.

[0063] And, in specific implementation, taking a picture of the multiple light-emitting pixel groups 10 included in the micro light-emitting device array 1 to obtain the above target group lit image may include: only taking a picture of the in-focus area of the micro light-emitting device array 1 to obtain the above target group lit image; or, it may include: first taking a picture of the entire area of the micro light-emitting device array 1, and then selecting an image area of the captured image that is clear and includes the lit light-emitting pixels as the target group lit image. In this way, it can be ensured that all the captured images of the lit light-emitting pixels in the obtained target group lit image are clear, thereby realizing the optical crosstalk detection only for the in-focus area of the micro light-emitting device array 1, and being able to avoid the increase in the optical crosstalk detection error caused by the possible blurring of individual lit light-emitting pixels during focusing. Therefore, the optical crosstalk detection error caused by focusing can be reduced, thereby improving the accuracy of the optical crosstalk detection result.

[0064] Step S102: Determine the brightness distribution information within the optical crosstalk detection area of the target group lit image.

[0065] Specifically, as Figure 1 shown, after obtaining the above-mentioned target group lit image, the above-mentioned optical detection device can determine the brightness distribution information within the optical crosstalk detection region of the target group lit image through the computer 4.

[0066] In this embodiment, the optical crosstalk detection region of the target group lit image can be all or part of the target group lit image. Specifically, the target group lit image can include a plurality of pixel points arranged in an array, and can have multiple rows and multiple columns of pixel points. And in the target group lit image, each row of pixel points is a pixel row, and each column of pixel points is a pixel column. Also, the above-mentioned target light-emitting pixel group can correspond to at least one pixel column in the target group lit image. In other words, in the target group lit image, the region where the captured image of the above-mentioned target light-emitting pixel group is located can correspond to the region where at least one pixel column in the target group lit image is located.

[0067] In some embodiments, as Figure 4 shown, before the above-mentioned step S102, the above-mentioned optical detection method can further include:

[0068] Step S21: Determine the optical crosstalk detection region from the target group lit image. The optical crosstalk detection region includes the region where the captured image of the target light-emitting pixel group is located and the regions where the captured images of at least one affected light-emitting pixel group adjacent to the target light-emitting pixel group are located. The affected light-emitting pixel group is a light-emitting pixel group among the multiple light-emitting pixel groups that is affected by the optical crosstalk of the target light-emitting pixel group.

[0069] In some specific embodiments, the above-mentioned target light-emitting pixel group corresponds to at least one pixel column in the target group lit image. And, as Figure 5 shown, the above-mentioned step S21 can specifically include:

[0070] Step S211: Determine the lit central pixel point of each target pixel row among the multiple target pixel rows of the target group lit image. The lit central pixel point of each target pixel row is the pixel point with the maximum brightness value in each target pixel row.

[0071] Specifically, the multiple target pixel rows of the above-mentioned target group lit image can be arranged adjacent to each other in sequence along the column direction of the target group lit image, and the multiple target pixel rows of the target group lit image can be all or part of the pixel rows of the target group lit image.

[0072] In some embodiments, the multiple target pixel rows of the above-mentioned target group lit image can be all the pixel rows of the target group lit image. And the above-mentioned optical detection device can identify the pixel point with the maximum brightness value in each pixel row of the target group lit image by traversing each pixel point of the target group lit image and define it as the lit central pixel point.

[0073] In some embodiments, in the above-mentioned target group lighting image, the target pixel row may be the pixel row where the part of the captured image of the target light-emitting pixel group in the above-mentioned target group lighting image satisfies the preset clarity condition. In this way, only the pixel rows where the parts with high clarity of the captured image of the target light-emitting pixel group in the above-mentioned target group lighting image are located are subjected to data processing, which not only reduces the amount of calculation, helps improve the light crosstalk detection efficiency, but also realizes the light crosstalk detection only for the area where the micro-light-emitting device array 1 is in clear focus, and can avoid the increase in light crosstalk detection error caused by the blurring of some lit light-emitting pixels during the focusing process, and helps improve the accuracy of the light crosstalk detection result.

[0074] In addition, compared with the solution of performing light crosstalk detection on the entire area of the micro-light-emitting device array 1, the solution of performing light crosstalk detection only on the area where the micro-light-emitting device array 1 is in clear focus, since the area in clear focus is smaller than the entire area, the brightness uniformity between the lit light-emitting pixels in the area in clear focus can be better than that between the lit light-emitting pixels in the entire area. Therefore, the influence of the brightness uniformity between the lit light-emitting pixels on the light crosstalk detection result is reduced, which helps to further reduce the detection error of light crosstalk.

[0075] In this embodiment, the above-mentioned target group lighting image may be a color image or a grayscale image (as Figure 6 shown).

[0076] In some examples, the above-mentioned target group lighting image is a color image, and the above-mentioned step S211 may specifically include: converting the target group lighting image into a grayscale image (as Figure 6 shown), and then determining the lit central pixel points of each target pixel row in the multiple target pixel rows of the grayscale image, and the lit central pixel point of each target pixel row is the pixel point with the largest grayscale value in each target pixel row.

[0077] It should be noted that the specific implementation manner of determining the lit central pixel points of each target pixel row in the multiple target pixel rows of the grayscale image may refer to the specific implementation manner of determining the lit central pixel points of each target pixel row in the multiple target pixel rows of the above-mentioned target group lighting image, and only need to replace the target group lighting image in the specific implementation manner of determining the lit central pixel points of each target pixel row in the multiple target pixel rows of the above-mentioned target group lighting image with the grayscale image to obtain the specific implementation manner of determining the lit central pixel points of each target pixel row in the multiple target pixel rows of the grayscale image, so it will not be elaborated here.

[0078] Moreover, in specific implementation, the above-mentioned conversion of the target group lighting image into a grayscale image may include:

[0079] Through the grayscale conversion formula, the three-primary color data (e.g., red value, green value, and blue value) of each pixel in the target group illuminated image is converted into the corresponding grayscale value to obtain a grayscale image, where the grayscale conversion formula is:

[0080] Gray = 0.299×R + 0.587×G + 0.114×B;

[0081] where Gray represents the grayscale value of each pixel in the grayscale image, and R, G, and B are the red value, green value, and blue value of each pixel in the target group illuminated image, respectively.

[0082] In some other examples, the above target group illuminated image is a grayscale image (as Figure 6 shown), and the illuminated central pixel of each target pixel row can specifically be the pixel with the largest grayscale value in each target pixel row.

[0083] Step S212: According to the first preset rule and the illuminated central pixel of each target pixel row, determine the optical crosstalk detection pixel group of each target pixel row. The optical crosstalk detection pixel group of each target pixel row is composed of a plurality of pixels that are arranged adjacent to each other in sequence and include the illuminated central pixel in each target pixel row, and the area where the optical crosstalk detection pixel groups of all target pixel rows in the target group illuminated image are located is the optical crosstalk detection area.

[0084] Specifically, the above first preset rule can be a preset quantity. And the optical crosstalk detection pixel group of each target pixel row can specifically be composed of the illuminated central pixel, the first preset quantity of pixels that are arranged adjacent to each other in sequence on one side of the illuminated central pixel along the row direction of the target illuminated image, and the second preset quantity of pixels that are arranged adjacent to each other in sequence on the other side of the illuminated central pixel along the row direction of the target illuminated image. Wherein, the above preset quantity can include the first preset quantity and the second preset quantity; or, the first preset quantity and the second preset quantity can both be equal to the above preset quantity.

[0085] It should be noted that the above first preset quantity and second preset quantity should be large enough so that at least the captured images of the above target light-emitting pixel group and all affected light-emitting pixel groups are completely located within the area where the optical crosstalk detection pixel groups of all target pixel rows in the target group illuminated image are located (i.e., the above optical crosstalk detection area).

[0086] Moreover, in specific implementation, the specific values of the above-mentioned first preset quantity and second preset quantity can be adaptively adjusted according to actual needs. For example, when the above-mentioned microscope imager 3 captures multiple light-emitting pixel groups 10 included in the above-mentioned micro light-emitting device array 1, if the magnification used increases, the above-mentioned first preset quantity and second preset quantity can be adaptively increased; vice versa. In this way, it is ensured that the above-mentioned first preset quantity and second preset quantity can be adapted to the number of pixel columns in the area where the captured images of the target light-emitting pixel group and all affected light-emitting pixel groups in the above-mentioned target group lighting image are located, thereby ensuring the accuracy of the optical crosstalk detection result.

[0087] Step S103: Determine the optical crosstalk detection result of the micro light-emitting device array according to the brightness distribution information.

[0088] Specifically, as Figure 1 shown, after obtaining the brightness distribution information in the optical crosstalk detection area of the above-mentioned target group lighting image, the above-mentioned optical detection device can then determine the optical crosstalk detection result of the micro light-emitting device array through the computer 4 according to the brightness distribution information.

[0089] In some embodiments, the above-mentioned target light-emitting pixel group corresponds to at least one pixel column in the target group lighting image. And, the above-mentioned step S102 may include: determining the average brightness distribution curve in the optical crosstalk detection area of the target group lighting image, and the average brightness distribution curve is used to characterize the correspondence between the pixel positions of each pixel column along the row direction of the target column lighting image in the optical crosstalk detection area and the average value of the brightness values of all pixel points in each pixel column in the optical crosstalk detection area. Among them, the pixel position of each pixel column along the row direction of the target column lighting image in the optical crosstalk detection area can be represented as the arrangement serial number of each pixel column along the row direction of the target column lighting image in the optical crosstalk detection area.

[0090] Correspondingly, the above-mentioned step S103 may include: determining the optical crosstalk detection result of the micro light-emitting device array according to the average brightness distribution curve.

[0091] In some specific embodiments, as Figure 5 shown, in order to determine the average brightness distribution curve in the optical crosstalk detection area of the above-mentioned target group lighting image, the above-mentioned step S102 may specifically include:

[0092] Step S1021: Determine the brightness distribution curve of each pixel row in the optical crosstalk detection area of the target group lighting image, and the brightness distribution curve of each pixel row in the optical crosstalk detection area is used to characterize the correspondence between the pixel positions of each pixel point along the row direction of the target column lighting image in each pixel row in the optical crosstalk detection area and the brightness values of each pixel point in each pixel row in the optical crosstalk detection area.

[0093] Among them, the pixel positions of each pixel point in each pixel row within the optical crosstalk detection region along the row direction of the image lit along the target column can be represented as the arrangement serial numbers of each pixel point in each pixel row within the optical crosstalk detection region along the row direction of the image lit along the target column.

[0094] Specifically, for each pixel row within the above-mentioned optical crosstalk detection region, the above-mentioned optical detection device can perform curve fitting based on the pixel positions of each pixel point in this pixel row along the row direction of the image lit along the target column and the brightness values of each pixel point in this pixel row, so as to obtain the brightness distribution curve of this pixel row, and the brightness distribution curve of this pixel row can be expressed as y = f(x), where x is the pixel position and y is the brightness value of the pixel point with pixel position x in this pixel row. It can be understood that the fitting method of the above-mentioned brightness distribution curve can refer to the implementation manners of curve fitting for multiple discrete points in the prior art, so it will not be elaborated here.

[0095] Step S1022: Take the average value of the brightness distribution curves of all pixel rows within the optical crosstalk detection region to obtain the average brightness distribution curve.

[0096] Specifically, after obtaining the brightness distribution curves of all pixel rows within the above-mentioned optical crosstalk detection region, the above-mentioned optical detection device can take the average value of the brightness distribution curves of all pixel rows within the above-mentioned optical crosstalk detection region to obtain the average brightness distribution curve. Among them, as Figure 5 shown, this average brightness distribution curve can be expressed as y' = f'(x), where x is the pixel position and y' is the average brightness value of all pixel points with pixel position x within the above-mentioned optical crosstalk detection region, that is, the average value of the brightness values of all pixel points with pixel position x within the above-mentioned optical crosstalk detection region.

[0097] In some specific embodiments, as Figure 5 shown, in order to determine the optical crosstalk detection result of the micro light-emitting device array according to the average brightness distribution curve, the above-mentioned step S103 can specifically include:

[0098] Step S1031: Determine the region corresponding to the target light-emitting pixel column of the average brightness distribution curve as the lit region.

[0099] Specifically, after obtaining the above-mentioned average brightness distribution curve, the above-mentioned optical detection device can determine the pixel position of the highest point of this average brightness distribution curve, and determine the region corresponding to the above-mentioned target light-emitting pixel column of this brightness distribution curve as the lit region according to the second preset rule and the pixel position of the highest point.

[0100] Among them, the second preset rule can include a preset value. And, as Figure 7As shown, the lit area of the above average brightness distribution curve includes the highest point of the above average brightness distribution curve, and the difference between the pixel position of the termination point of the lit area of the above average brightness distribution curve (i.e., d2) and the pixel position of the highest point of the above average brightness distribution curve may be equal to a first preset value, and the difference between the pixel position of the highest point of the above average brightness distribution curve and the pixel position of the starting point of the lit area of the above average brightness distribution curve (i.e., d1) may be equal to a second preset value. Specifically, the above preset value may include a first preset value and a second preset value; or, both the first preset value and the second preset value may be equal to the above preset value.

[0101] Moreover, in specific implementation, the specific values of the above first preset value and second preset value can be adaptively adjusted according to actual needs. For example, when the micro imager 3 captures images of the multiple light-emitting pixel groups 10 included in the micro light-emitting device array 1, if the magnification used increases, the above first preset value and second preset value can be adaptively increased; and vice versa. In this way, it is ensured that the difference between the pixel position of the termination point of the above average brightness distribution curve (i.e., d2) and the pixel position of the starting point of the lit area of the above average brightness distribution curve (i.e., d1) can be adapted to the number of pixel columns in the area where the captured image of the target light-emitting pixel group in the target group lit image is located, thereby ensuring the accuracy of the optical crosstalk detection result.

[0102] Moreover, in specific implementation, the above first preset value and second preset value can be determined by the resolution of the above target group brightness image, the resolution of the above micro light-emitting device array, and the magnification used when the micro imager 3 captures images of the multiple light-emitting pixel groups included in the micro light-emitting device array.

[0103] Step S1032: Calculate the curve area within the lit area and the curve area within other areas of the average brightness distribution curve except the lit area.

[0104] Specifically, the curve area within the lit area and the curve area within other areas of the average brightness distribution curve except the lit area can be calculated by means of gradient integration.

[0105] In some embodiments, such as Figure 7As shown, other regions of the above-mentioned average brightness distribution curve except the lit region can specifically be crosstalk regions, and the crosstalk regions can include a left crosstalk region and a right crosstalk region. The left crosstalk region and the right crosstalk region are respectively located on opposite sides (i.e., the left side and the right side) of the lit region. Among them, the termination point p1 of the left crosstalk region overlaps with the starting point p1 of the lit region, the starting point p2 of the right crosstalk region overlaps with the termination point p2 of the lit region, and the difference between the pixel position of the termination point p1 of the left crosstalk region and the pixel position of the starting point p0 of the left crosstalk region can be equal to a third preset value, and the difference between the pixel position of the termination point p3 of the right crosstalk region and the pixel position of the starting point p2 of the right crosstalk region can be equal to a fourth preset value. Both the third preset value and the fourth preset value are positive integers.

[0106] Moreover, in specific implementation, the third preset value and the fourth preset value can be equal, and their specific values can be determined by the light-emitting pixel groups (i.e., the above-mentioned affected light-emitting pixel groups) in the multiple light-emitting pixel groups included in the above-mentioned micro light-emitting device array that are affected by the light crosstalk of the target light-emitting pixel group, so that the pixel positions of the above-mentioned affected light-emitting pixel groups along the row direction of the above-mentioned target group's lit image are all between the pixel position of the starting point p0 of the left crosstalk region and the pixel position of the termination point p1 of the left crosstalk region, or all between the pixel position of the starting point p2 of the right crosstalk region and the pixel position of the termination point p3 of the right crosstalk region.

[0107] Take Figure 7 the average brightness distribution curve shown in it as an example. The pixel position of the starting point p0 of the left crosstalk region can be 0, the pixel position of the termination point p1 of the left crosstalk region can be d1, the pixel position of the starting point p1 of the lit region can be d1, the pixel position of the termination point p2 of the lit region can be d2, the pixel position of the starting point p2 of the right crosstalk region can be d2, and the pixel position of the termination point p3 of the right crosstalk region can be 500. Among them, both d1 and d2 are greater than 1 and less than 500, and d1 is less than d2.

[0108] Specifically, as Figure 7 shown, the average brightness distribution curve in the left crosstalk region can have multiple peaks, and the pixel position of each peak vertex can correspond to the left edge position of an affected light-emitting pixel group. This phenomenon is due to the fact that when the target light-emitting pixel group is in the lit state, it will illuminate the left edge of the adjacent affected light-emitting pixel group on its left. The average brightness distribution curve in the right crosstalk region can have multiple peaks, and the pixel position of each peak vertex can correspond to the right edge position of an affected light-emitting pixel group. This phenomenon is due to the fact that when the target light-emitting pixel group is in the lit state, it will illuminate the right edge of the adjacent affected light-emitting pixel group on its right.

[0109] In some specific embodiments, the curve area within the above-mentioned lit area and the curve areas within other areas (such as the above-mentioned left crosstalk area and the above-mentioned right crosstalk area) outside the lit area of the above-mentioned average brightness distribution curve can be calculated through the gradient integration formula, where the gradient integration formula is:

[0110]

[0111] where Area is the area for which the curve area is to be calculated, and the area for which the curve area is to be calculated is specifically the above-mentioned lit area, the above-mentioned left crosstalk area, or the above-mentioned right crosstalk area, j1 is the starting point of the area for which the curve area is to be calculated, j2 is the ending point of the area for which the curve area is to be calculated, i is the current calculation point of the area for which the curve area is to be calculated, x i and y i are respectively the pixel position and the average brightness value of the current calculation point, x i+1 and y i+1 are respectively the pixel position and the average brightness value of the next calculation point.

[0112] It should be noted that, compared with the related art where the light crosstalk situation of the micro-light-emitting device array is reflected by the brightness contrast between different areas, there is a problem that the brightness contrast between different areas cannot directly reflect the crosstalk situation between pixels. In this embodiment, the light crosstalk situation of the micro-light-emitting device array is reflected by the brightness contrast between pixels. Since the brightness contrast between pixels more conforms to the definition of light crosstalk, it can truly reflect the crosstalk relationship between pixels, thereby improving the accuracy of the light crosstalk detection structure. In addition, in this embodiment, the curve areas in different areas are calculated by means of gradient integration, which can further improve the brightness calculation accuracy between pixels, thereby further improving the accuracy of the light crosstalk detection structure.

[0113] Step S1033: Determine the light crosstalk detection result of the micro-light-emitting device array according to the curve area within the lit area and the curve areas within other areas.

[0114] Specifically, after obtaining the curve area within the above-mentioned lit area and the curve areas within the above-mentioned other areas, the above-mentioned optical detection device can calculate the ratio of the curved surface area within the above-mentioned lit area to the curve areas within the above-mentioned other areas to obtain a light crosstalk detection result including this ratio.

[0115] In some examples, the above-mentioned other areas can specifically be the above-mentioned left crosstalk area and the above-mentioned right crosstalk area. Correspondingly, the curve areas within the above-mentioned other areas can specifically be the sum of the curve area within the above-mentioned left crosstalk area and the curve area within the above-mentioned right crosstalk area.

[0116] In some examples, the optical crosstalk detection result obtained after the above step S1033 can specifically be the ratio of the curved surface area within the above-mentioned illuminated area to the curved line area within the above-mentioned other areas. Thus, through the magnitude of this ratio, the optical crosstalk of the above-mentioned micro light-emitting device array 1 is numericalized, making the effect of the optical crosstalk improvement process clearly visible. As Figure 8 shown, after the process improvement, the area of the crosstalk region is significantly reduced, and the ratio increases from 0.229 to 0.621. The higher the ratio, the weaker the optical crosstalk. In addition, in actual production, by setting a certain value as the product standard, strict control over the product quality can be achieved.

[0117] As can be seen from the above, in the optical detection method provided in this embodiment, when only the target light-emitting pixel group among the multiple light-emitting pixel groups included in the micro light-emitting device array is illuminated, the multiple light-emitting pixel groups included in the micro light-emitting device array are photographed to obtain a target group illuminated image, and then the brightness distribution information within the optical crosstalk detection region of the target group illuminated image is determined. Based on the brightness distribution information, the optical crosstalk detection result of the micro light-emitting device array is determined. Thus, during the process of photographing the multiple light-emitting pixel groups when only the target light-emitting pixel group among the multiple light-emitting pixel groups included in the micro light-emitting device array is illuminated, since the multiple light-emitting pixels included in the target light-emitting pixel group are arranged linearly, it can be ensured that at least some of all the illuminated light-emitting pixels of the micro light-emitting device array are located on the same focal plane, and the unilluminated light-emitting pixels near each illuminated light-emitting pixel are also mostly located on the same focal plane as it. Based on this, the optical crosstalk can be detected only for the area where the micro light-emitting device array is in focus, so as to avoid an increase in the optical crosstalk detection error caused by individual illuminated light-emitting pixels being blurred during focusing. Therefore, the optical crosstalk detection error caused by focusing can be reduced, thereby improving the accuracy of the optical crosstalk detection result.

[0118] Based on the method described in the above embodiment, this embodiment will be further described from the perspective of the optical detection device. Please refer to Figure 9 , Figure 9 which specifically describes the optical detection device provided in the embodiment of the present application. This optical detection device is used to detect the optical crosstalk of the micro light-emitting device array and is applied to the optical detection system. Specifically, as Figure 1As shown in the figure, the optical detection system includes an integrated driving board 2, a microscopic imager 3, a computer 4, and a micro light-emitting device array 1, and the above-mentioned optical detection device can be specifically integrated in the computer 4. Among them, the integrated driving board 2 is configured to control the display screen and brightness of the micro light-emitting device array 1, the microscopic imager 3 is configured to photograph the light-emitting side of the micro light-emitting device array 1, and the computer 4 is configured to perform data processing on the image obtained by the microscopic imager 3 to achieve the detection of the optical crosstalk of the micro light-emitting device array 1. And, the micro light-emitting device array 1 includes a plurality of light-emitting pixel groups arranged in sequence along a first direction, the light-emitting pixel group includes a plurality of light-emitting pixels arranged linearly along a second direction, and the first direction intersects the second direction.

[0119] Specifically, as Figure 9 shown, the above-mentioned optical detection device 30 may include: an acquisition module 301, a first determination module 302, and a second determination module 303, where:

[0120] (1) Acquisition module 301

[0121] The acquisition module 301 is configured to control the micro light-emitting device array 1 to display a preset screen through the integrated driving board 2, so that only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array 1 is lit, and when only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array 1 is lit, photograph the plurality of light-emitting pixel groups included in the micro light-emitting device array 1 through the microscopic imager 3 to obtain a target group lighting image.

[0122] (2) First determination module 302

[0123] The first determination module 302 is configured to determine the brightness distribution information within the optical crosstalk detection region of the target group lighting image through the computer 4.

[0124] (3) Second determination module 303

[0125] The second determination module 303 is configured to determine the optical crosstalk detection result of the micro light-emitting device array through the computer 4 according to the brightness distribution information.

[0126] In some embodiments, the above-mentioned optical detection device 30 may further include:

[0127] (4) Third determination module

[0128] A third determination module, configured to determine a crosstalk detection region from the target group lighting image by a computer 4, where the crosstalk detection region includes a region where a captured image of the target light-emitting pixel group is located and a region where captured images of at least one affected light-emitting pixel group adjacent to the target light-emitting pixel group are located, and the affected light-emitting pixel group is a light-emitting pixel group among a plurality of light-emitting pixel groups that is affected by crosstalk of the target light-emitting pixel group.

[0129] Specifically, the above light-emitting pixel group may correspond to at least one pixel column in the target group lighting image.

[0130] Moreover, the above third determination module may specifically include:

[0131] A first determination unit, configured to determine, by a computer 4, a lighting center pixel point of each target pixel row among a plurality of target pixel rows of the target group lighting image, where the lighting center pixel point of each target pixel row is the pixel point with the largest brightness value in each target pixel row;

[0132] A second determination unit, configured to determine, by a computer 4, a crosstalk detection pixel group of each target pixel row according to a preset rule and the lighting center pixel point of each target pixel row, where the crosstalk detection pixel group of each target pixel row is composed of a plurality of pixel points that are arranged adjacent to each other in sequence and include the lighting center pixel point in each target pixel row, and the region where the crosstalk detection pixel groups of all target pixel rows in the target group lighting image are located is the crosstalk detection region.

[0133] In some embodiments, the above target light-emitting pixel group may correspond to at least one pixel column in the target group lighting image. Moreover, when the above first determination module 302 executes to determine the brightness distribution information within the crosstalk detection region of the target group lighting image, it may specifically execute: determining, by a computer 4, an average brightness distribution curve within the crosstalk detection region of the target group lighting image, where the average brightness distribution curve is used to represent the correspondence between the pixel positions of each pixel column along the row direction of the target column lighting image within the crosstalk detection region and the average value of the brightness values of all pixel points in each pixel column within the crosstalk detection region.

[0134] Correspondingly, when the above second determination module 303 executes to determine the crosstalk detection result of the micro light-emitting device array according to the brightness distribution information, it may specifically execute: determining, by a computer 4, the crosstalk detection result of the micro light-emitting device array according to the average brightness distribution curve.

[0135] In some specific embodiments, the above first determination module 302 may specifically include:

[0136] A third determination unit, configured to determine, by a computer 4, a brightness distribution curve of each pixel row within a light crosstalk detection region of a target group illuminated image, where the brightness distribution curve of each pixel row within the light crosstalk detection region is used to characterize the correspondence between the pixel positions of each pixel point in each pixel row within the light crosstalk detection region along the row direction of the target column illuminated image and the brightness values of each pixel point in each pixel row within the light crosstalk detection region;

[0137] An averaging unit, configured to average, by a computer 4, the brightness distribution curves of all pixel rows within the light crosstalk detection region to obtain an average brightness distribution curve.

[0138] In some specific embodiments, the above-mentioned second determination module 303 may specifically include:

[0139] A fourth determination unit, configured to determine, by a computer 4, a region corresponding to the target light-emitting pixel column of the average brightness distribution curve as an illuminated region;

[0140] A calculation unit, configured to calculate, by a computer 4, the curve area within the illuminated region and the curve area within other regions of the average brightness distribution curve except the illuminated region;

[0141] A fifth determination unit, configured to determine, by a computer 4, a light crosstalk detection result of the micro light-emitting device array according to the curve area within the illuminated region and the curve area within other regions.

[0142] Moreover, in specific implementation, when the above-mentioned calculation unit executes the calculation of the curve area within the illuminated region and the curve area within other regions of the average brightness distribution curve except the illuminated region, it may specifically execute: using a gradient integration method by a computer 4 to calculate the curve area within the illuminated region and the curve area within other regions of the average brightness distribution curve except the illuminated region.

[0143] In specific implementation, each of the above units and modules may be implemented as an independent entity, or may be combined arbitrarily to be implemented as the same or several entities. For the specific implementation of each of the above units and modules, reference may be made to the foregoing method embodiments, which will not be elaborated herein.

[0144] As described above, the optical detection device provided in this embodiment includes an acquisition module, which is configured to control a micro-light-emitting device array to display a preset image through an integrated driving board, so that only a target light-emitting pixel group among the multiple light-emitting pixel groups included in the micro-light-emitting device array is lit, and when only the target light-emitting pixel group among the multiple light-emitting pixel groups included in the micro-light-emitting device array is lit, a microscope imager is used to capture the multiple light-emitting pixel groups included in the micro-light-emitting device array to obtain a target group lit image; a first determination module, which is configured to determine the brightness distribution information within the optical crosstalk detection region of the target group lit image through a computer; a second determination module, which is configured to determine the optical crosstalk detection result of the micro-light-emitting device array through a computer according to the brightness distribution information. Thus, during the process of capturing multiple light-emitting pixel groups when only the target light-emitting pixel group among the multiple light-emitting pixel groups of the micro-light-emitting device array is lit, since the multiple light-emitting pixels included in the target light-emitting pixel group are arranged linearly, it can be ensured that at least some of all the lit light-emitting pixels of the micro-light-emitting device array are located on the same focal plane, and the unlit light-emitting pixels near each lit light-emitting pixel are also mostly located on the same focal plane as it. Based on this, the optical crosstalk detection can be performed only on the region where the micro-light-emitting device array is in clear focus, so as to avoid an increase in the optical crosstalk detection error caused by individual lit light-emitting pixels being blurred during focusing. Therefore, the optical crosstalk detection error caused by focusing can be reduced, thereby improving the accuracy of the optical crosstalk detection result.

[0145] Correspondingly, an embodiment of the present application further provides a computer-readable storage medium, which stores a computer program, and the computer program can be loaded by a processor to execute the steps in any of the optical detection methods provided in the embodiments of the present application. For example, the computer program can execute the following steps:

[0146] Obtain a target group lit image, which is obtained by capturing multiple light-emitting pixel groups when only a target light-emitting pixel group among the multiple light-emitting pixel groups is lit;

[0147] Determine the brightness distribution information within the optical crosstalk detection region of the target group lit image;

[0148] Determine the optical crosstalk detection result of the micro-light-emitting device array according to the brightness distribution information.

[0149] For the specific implementation of each of the above operations, reference can be made to the previous embodiments, which will not be elaborated here.

[0150] Among them, the computer-readable storage medium may include: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc.

[0151] Since the computer program stored in the computer-readable storage medium can execute the steps in any of the optical detection methods provided by the embodiments of the present application, the beneficial effects achievable by any of the optical detection methods provided by the embodiments of the present application can be realized. For details, refer to the previous embodiments and will not be elaborated herein.

[0152] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical detection method, characterized in that, The optical detection method is used to detect the optical crosstalk of a micro light-emitting device array. The micro light-emitting device array includes a plurality of light-emitting pixel groups arranged in sequence along a first direction. Each light-emitting pixel group includes a plurality of light-emitting pixels arranged linearly along a second direction. The first direction intersects the second direction. The optical detection method includes: When only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array is lit, photograph the plurality of light-emitting pixel groups included in the micro light-emitting device array to obtain a target group lit image. Determine the brightness distribution information within the optical crosstalk detection region of the target group lit image. Based on the brightness distribution information, determine the optical crosstalk detection result of the micro light-emitting device array.

2. The optical detection method according to claim 1, characterized in that, Before determining the brightness distribution information within the optical crosstalk detection region of the target group lit image, the method further includes: Determine the optical crosstalk detection region from the target group lit image. The optical crosstalk detection region includes the region where the photographed image of the target light-emitting pixel group is located and the regions where the photographed images of at least one affected light-emitting pixel group adjacent to the target light-emitting pixel group are located. The affected light-emitting pixel group is a light-emitting pixel group among the plurality of light-emitting pixel groups that is affected by the optical crosstalk of the target light-emitting pixel group.

3. The optical detection method according to claim 2, characterized in that The target light-emitting pixel group corresponds to at least one pixel column in the target group lit image. The determining the optical crosstalk detection region from the target group lit image includes: Determine the lit central pixel point of each target pixel row in the plurality of target pixel rows of the target group lit image. The lit central pixel point of each target pixel row is the pixel point with the maximum brightness value in each target pixel row. According to a preset rule and the lit central pixel point of each target pixel row, determine the optical crosstalk detection pixel group of each target pixel row. The optical crosstalk detection pixel group of each target pixel row is composed of a plurality of pixel points that are arranged adjacent to each other in sequence and include the lit central pixel point in each target pixel row. And the region where the optical crosstalk detection pixel groups of all the target pixel rows in the target group lit image are located is the optical crosstalk detection region.

4. The optical detection method according to claim 1, wherein The target light-emitting pixel group corresponds to at least one pixel column in the target group lit image. The determining the brightness distribution information within the optical crosstalk detection region of the target group lit image includes: Determine the average brightness distribution curve within the optical crosstalk detection region of the target group lit image. The average brightness distribution curve is used to characterize the corresponding relationship between the pixel positions of each pixel column along the row direction of the target column lit image within the optical crosstalk detection region and the average value of the brightness values of all pixel points in each pixel column within the optical crosstalk detection region. The determining the optical crosstalk detection result of the micro light-emitting device array based on the brightness distribution information includes: Based on the average brightness distribution curve, determine the optical crosstalk detection result of the micro light-emitting device array.

5. The optical detection method according to claim 4, wherein The determining the average brightness distribution curve within the optical crosstalk detection region of the target group lit image includes: Determine the brightness distribution curve of each pixel row within the optical crosstalk detection region of the target group's lit image. The brightness distribution curve of each pixel row within the optical crosstalk detection region is used to characterize the correspondence between the pixel positions of each pixel point along the row direction of the target column's lit image and the brightness values of each pixel point in each pixel row within the optical crosstalk detection region; Take the average of the brightness distribution curves of all pixel rows within the optical crosstalk detection region to obtain the average brightness distribution curve.

6. The optical detection method according to claim 4, characterized in that The determining the optical crosstalk detection result of the micro-light-emitting device array according to the average brightness distribution curve includes: Determine the region corresponding to the target light-emitting pixel column of the average brightness distribution curve as the lit region; Calculate the curve area within the lit region and the curve area within other regions of the average brightness distribution curve except the lit region; Determine the optical crosstalk detection result of the micro-light-emitting device array based on the curve area within the lit region and the curve area within other regions.

7. The optical detection method according to claim 6, characterized in that The calculating the curve area within the lit region and the curve area within other regions of the average brightness distribution curve except the lit region includes: Calculate the curve area within the lit region and the curve area within other regions of the average brightness distribution curve except the lit region by means of gradient integration.

8. The optical detection method according to any one of claims 1 to 7, characterized in that The optical detection method is applied to an optical detection system, which includes an integrated driving board, a microscopic imager, a computer, and the micro-light-emitting device array. Among them, the integrated driving board is configured to control the display screen and brightness of the micro-light-emitting device array, the microscopic imager is configured to capture the light-emitting side of the micro-light-emitting device array, and the computer is configured to perform data processing on the image captured by the microscopic imager to achieve optical crosstalk detection of the micro-light-emitting device array; And, the optical detection method specifically includes: Through the integrated driving board, control the micro-light-emitting device array to display a preset screen so that only the target light-emitting pixel group among the multiple light-emitting pixel groups included in the micro-light-emitting device array is lit; When only the target light-emitting pixel group among the multiple light-emitting pixel groups included in the micro-light-emitting device array is lit, capture the multiple light-emitting pixel groups included in the micro-light-emitting device array through the microscopic imager to obtain a target group lit image; Through the computer, determine the brightness distribution information within the optical crosstalk detection region of the target group lit image, and determine the optical crosstalk detection result of the micro-light-emitting device array according to the brightness distribution information.

9. An optical detection device, characterized in that, The optical detection device is used to detect the optical crosstalk of a micro light-emitting device array and is applied to an optical detection system. The optical detection system includes an integrated driving board, a microscopic imager, a computer, and a micro light-emitting device array. Among them, the integrated driving board is configured to control the display screen and brightness of the micro light-emitting device array. The microscopic imager is configured to photograph the light-emitting side of the micro light-emitting device array. The computer is configured to perform data processing on the image obtained by the microscopic imager to achieve the detection of the optical crosstalk of the micro light-emitting device array. The micro light-emitting device array includes a plurality of light-emitting pixel groups arranged in sequence along a first direction. Each light-emitting pixel group includes a plurality of light-emitting pixels arranged linearly along a second direction. The first direction intersects the second direction. The optical detection device includes: An acquisition module, configured to control the micro light-emitting device array to display a preset screen through the integrated driving board, so that only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array is lit. When only the target light-emitting pixel group among the plurality of light-emitting pixel groups included in the micro light-emitting device array is lit, photograph the plurality of light-emitting pixel groups included in the micro light-emitting device array through the microscopic imager to obtain a target group lit image. A first determination module, configured to determine the brightness distribution information within the optical crosstalk detection region of the target group lit image through the computer. A second determination module, configured to determine the optical crosstalk detection result of the micro light-emitting device array through the computer according to the brightness distribution information.

10. The optical detection device according to claim 9, characterized in that, The optical detection device further includes: A third determination module, configured to determine the optical crosstalk detection region from the target group lit image through the computer. The optical crosstalk detection region includes the region where the photographed image of the target light-emitting pixel group is located and the regions where the photographed images of at least one affected light-emitting pixel group adjacent to the target light-emitting pixel group are located. The affected light-emitting pixel group is a light-emitting pixel group among the plurality of light-emitting pixel groups that is affected by the optical crosstalk of the target light-emitting pixel group.

11. The optical detection device according to claim 10, wherein The target light-emitting pixel group corresponds to at least one pixel column in the target group lit image. The third determination module includes: A first determination unit, configured to determine the lit center pixel point of each target pixel row in the plurality of target pixel rows of the target group lit image through the computer. The lit center pixel point of each target pixel row is the pixel point with the maximum brightness value in each target pixel row. A second determination unit, configured to determine the optical crosstalk detection pixel group of each target pixel row through the computer according to a preset rule and the lit center pixel point of each target pixel row. The optical crosstalk detection pixel group of each target pixel row is composed of a plurality of pixel points that are arranged adjacent to each other in sequence and include the lit center pixel point in each target pixel row. And the region where the optical crosstalk detection pixel groups of all the target pixel rows in the target group lit image are located is the optical crosstalk detection region.

12. The optical detection device according to claim 1, characterized in that, The target light-emitting pixel group corresponds to at least one pixel column in the target group lighting image; when the first determination module executes the determination of the brightness distribution information in the optical crosstalk detection region of the target group lighting image by the computer, it specifically executes: Determine, by the computer, the average brightness distribution curve in the optical crosstalk detection region of the target group lighting image, where the average brightness distribution curve is used to characterize the correspondence between the pixel positions of each pixel column in the optical crosstalk detection region along the row direction of the target column lighting image and the average value of the brightness values of all pixel points in each pixel column in the optical crosstalk detection region; When the second determination module executes the determination of the optical crosstalk detection result of the micro light-emitting device array by the computer according to the brightness distribution information, it specifically executes: Determine, by the computer, the optical crosstalk detection result of the micro light-emitting device array according to the average brightness distribution curve.

13. The optical detection device according to claim 12, characterized in that, The first determination module includes: A third determination unit for determining, by the computer, the brightness distribution curve of each pixel row in the optical crosstalk detection region of the target group lighting image, where the brightness distribution curve of each pixel row in the optical crosstalk detection region is used to characterize the correspondence between the pixel positions of each pixel point in each pixel row in the optical crosstalk detection region along the row direction of the target column lighting image and the brightness values of each pixel point in each pixel row in the optical crosstalk detection region; An averaging unit for averaging, by the computer, the brightness distribution curves of all pixel rows in the optical crosstalk detection region to obtain an average brightness distribution curve.

14. The optical detection device according to claim 12, characterized in that, The second determination module includes: A fourth determination unit for determining, by the computer, the region corresponding to the target light-emitting pixel column in the average brightness distribution curve as the lit region; A calculation unit for calculating, by the computer, the curve area in the lit region and the curve area in other regions of the average brightness distribution curve except the lit region; A fifth determination unit for determining, by the computer, the optical crosstalk detection result of the micro light-emitting device array according to the curve area in the lit region and the curve area in other regions.

15. The optical detection device according to claim 14, wherein When the calculation unit executes the calculation of the curve area in the lit region and the curve area in other regions of the average brightness distribution curve except the lit region by the computer, it specifically executes: Calculate, by the computer, the curve area in the lit region and the curve area in other regions of the average brightness distribution curve except the lit region by using the method of gradient integration.

16. An optical detection system, characterized in that, It includes a micro light-emitting device array, an integrated driving board, a micro imager and a computer. Among them, the integrated driving board is configured to control the display screen and brightness of the micro light-emitting device array, the micro imager is configured to photograph the light-emitting side of the micro light-emitting device array, and the computer is configured to perform data processing on the image obtained by the micro imager to achieve light crosstalk detection of the micro light-emitting device array. Moreover, the computer integrates the optical detection device according to any one of claims 9-15.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and the computer program is adapted to be loaded by a processor to execute the optical detection method according to any one of claims 1-8.

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