A camera-based cascaded display module detection device and method

Abstract

This invention discloses a camera-based cascaded display module testing device and method. The camera-based cascaded display module testing device includes N display module testing modules. Each pair of display module testing modules is connected to each other. Each display module testing module is used to display different test functions according to different test programs and obtain corresponding test results. This invention achieves simultaneous testing of multiple display module testing modules for different functions according to different test programs, effectively improving testing efficiency, saving testing costs, and realizing an intelligent working mode due to the interconnection between multiple display module testing modules.

Description

Technical Field

[0001] This invention relates to the field of display module testing technology, and in particular to a camera-based cascaded display module testing device and method. Background Technology

[0002] The current display module testing equipment has a fixed testing program. Even if multiple display modules are tested simultaneously using a cable that can connect to multiple display modules, it can only achieve the function of batch testing and cannot perform multi-functional testing on each display module at the same time.

[0003] Therefore, existing technologies still need to be improved and enhanced. Summary of the Invention

[0004] The main objective of this invention is to provide a camera-based cascaded display module testing device and method, which aims to solve the problem that existing display module testing devices cannot simultaneously test the different functions of multiple display modules.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A camera-based cascaded display module testing device includes: N display module testing modules; each pair of display module testing modules is connected to each other, and the display module testing modules are used to display different test functions according to different test programs and obtain the corresponding test results.

[0007] In the camera-based cascaded display module testing device, each display module testing module includes: a display unit, a camera unit, a main control unit, and an automatic optical inspection unit; the display unit is connected to the camera unit and the main control unit respectively, and the display unit, the automatic optical inspection unit, and the main control unit are connected in sequence.

[0008] The main control unit is used to detect the parameters of the camera unit using a detection program, and then provide a screen test signal to the display unit based on the parameters; the display unit is used to display an image or video based on the screen test signal; the camera unit is used to capture an image or video in the display unit and then generate a detection signal to the automatic optical detection unit; the automatic optical detection unit is used to transmit the detection signal to the main control unit; the main control unit is also used to generate a corresponding detection result based on the detection signal; wherein, the detection signal includes: RGB color signal, brightness information, infrared thermal information, and wide dynamic range signal.

[0009] In the camera-based cascaded display module testing device, the main control units in every two display module testing modules are connected in pairs via wireless or wired means; the main control unit adopts a high-performance CPU combined with PGFA architecture.

[0010] In the camera-based cascaded display module detection device, the display unit includes a high-resolution and high-refresh-rate display module.

[0011] In the camera-based cascaded display module detection device, the camera unit includes: a wide dynamic range camera, a strong light suppression camera, an image camera, an area array camera, a monochrome camera, a single-chip color camera, a 3CCD color camera, a line array camera, a 3Line color camera, and an infrared thermal camera.

[0012] In the camera-based cascaded display module detection device, the automatic optical inspection unit includes an AOI device; the AOI device is connected to the display unit and the main control unit respectively.

[0013] A camera-based cascaded display module detection method for the camera-based cascaded display module detection device described above, the camera-based cascaded display module detection method comprising:

[0014] In the first testing phase, the first display module testing module displays the first test function according to the first test program and obtains the first test result. When the first test result is normal, it sends the first test completion information to the second display module testing module.

[0015] The second display module test module starts the second stage test based on the first test completion information. After the second test module displays the second test function according to the second test program, it obtains the second test result and sends the second test completion information to the third display module test module when the second test result is normal.

[0016] The third display module test module begins the third phase of testing based on the second test completion information, until all display module test modules have been tested.

[0017] The camera-based cascaded display module detection method further includes:

[0018] In the first testing phase, the first display module testing module displays the first test function according to the first test program and obtains the first test result. When the first test result is abnormal, it sends the first test abnormality information to the second display module testing module.

[0019] The second display module test module records the first test anomaly information and starts the second stage test. After the second display module test module displays the second test function according to the second test program, it obtains the second test result.

[0020] When the second detection result is abnormal, the second display module test module sends the first test abnormality information and the second test abnormality information to the third display module test module;

[0021] The third display module test module records the first test exception information and the second test exception information, and begins the third stage of testing until all display module test modules have been tested.

[0022] In the camera-based cascaded display module testing method, the step of the first display module testing module obtaining a first test result after displaying a first test function according to a first test program in the first test phase, and sending a first test completion message to the second display module testing module when the first test result is normal, specifically includes:

[0023] In the first testing phase, the first main control unit in the first display module testing module uses the first test program to detect the parameters of the first camera unit in the first display module testing module;

[0024] The first camera unit transmits the first screen test signal generated according to the parameters to the first display unit in the first display module test module;

[0025] The first display unit displays images or videos based on the first screen test signal;

[0026] After the first camera unit in the first display module test module captures an image or video in the first display unit, it generates a first detection signal.

[0027] The first camera unit transmits the first detection signal to the first main control unit through the first automatic optical detection unit in the first display module test module;

[0028] The first main control unit generates the first detection result based on the first detection signal, and sends the first test completion information to the second main control unit in the second display module test module when the first detection result is normal.

[0029] In the camera-based cascaded display module testing method, the second display module testing module starts a second-stage test based on the first test completion information. The second display module testing module obtains a second test result after displaying the second test function according to the second test program, and sends the second test completion information to the third display module testing module when the second test result is normal. The specific steps include:

[0030] After receiving the first test completion information, the second main control unit uses the second test program to detect the parameters of the second camera unit in the second display module test module;

[0031] The second camera unit transmits the generated second screen test signal to the second display unit in the second display module test module;

[0032] The second display unit displays images or videos based on the second screen test signal;

[0033] After the second camera unit in the second display module test module captures the image or video in the second display unit, it generates a second detection signal.

[0034] The second camera unit transmits the second detection signal to the second main control unit through the second automatic optical detection unit in the second display module test module;

[0035] The second main control unit generates the second detection result based on the second detection signal, and sends the second test completion information to the third main control unit in the third display module test module when the second detection result is normal.

[0036] Compared to existing technologies, this invention provides a camera-based cascaded display module testing device and method. The camera-based cascaded display module testing device includes N display module testing modules; each pair of display module testing modules is connected to each other. Each display module testing module is used to display different test functions according to different test programs and obtain corresponding test results. This invention achieves simultaneous testing of multiple display module testing modules for different functions according to different test programs, effectively improving testing efficiency, saving testing costs, and realizing an intelligent working mode due to the interconnection between multiple display module testing modules. Attached Figure Description

[0037] Figure 1 This is a structural block diagram of a preferred embodiment of the camera-based cascaded display module detection device provided by the present invention;

[0038] Figure 2 This is a schematic diagram of the physical structure of a preferred embodiment of the camera-based cascaded display module detection device provided by the present invention.

[0039] Figure 3 A flowchart of a preferred embodiment of the camera-based cascaded display module detection method provided by the present invention;

[0040] Figure 4 The flowchart of step S10 is provided in a preferred embodiment of the camera-based cascaded display module detection method of the present invention.

[0041] Figure 5 The flowchart of step S20 is shown in a preferred embodiment of the camera-based cascaded display module detection method provided by the present invention.

[0042] Figure 6 This is a flowchart of another embodiment of the camera-based cascaded display module detection method provided by the present invention.

[0043] Reference numerals: 100: Display module test module; 110: Display unit; 120: Camera unit; 130: Main control unit; 140: Automatic optical inspection unit. Detailed Implementation

[0044] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0045] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0046] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0047] This invention provides a camera-based cascaded display module testing device and method. The invention interconnects N display module test modules and displays different test functions on each module, effectively improving testing efficiency. Furthermore, it allows multiple display module test modules to display the same test function, creating a clear contrast and facilitating a more intuitive observation of performance differences between different display module test modules.

[0048] The design scheme of the camera-based cascaded display module detection device is described below through specific exemplary embodiments. It should be noted that the following embodiments are only used to explain the technical solution of the invention and are not intended to limit it specifically:

[0049] Please see Figure 1 This invention provides a camera-based cascaded display module testing device, comprising: N display module testing modules 100; each pair of display module testing modules 100 is connected in pairs, and each display module testing module 100 is used to display different test functions according to different test programs, and obtain the corresponding test results. The main control units 130 in each pair of display module testing modules 100 are connected in pairs via wireless or wired means; the main control unit 130 adopts a high-performance CPU combined with a PGFA architecture.

[0050] Specifically, each pair of the N display module test modules 100 is connected in pairs via wired or wireless means to form a cascaded structure. During functional testing of the display module test modules 100:

[0051] In the first embodiment, all N display module test modules 100 display the same test functions. That is, the display module test modules 100 are used to display the same test functions according to the same test program. For example, all display module test modules 100 perform RGB color and brightness tests or infrared thermal tests, and obtain the corresponding detection results on each display module test module (e.g., color abnormality, brightness abnormality, MURA abnormality, short circuit, and overcurrent). At this time, only one display module test module 100 needs to control the other display module test modules 100 to display the same screen functions through a cascaded connection channel, such as displaying images or videos with the same parameters. This effectively reduces the occupation of the main control unit 130 in the display module test module 100, reduces the utilization rate of the main control unit 130, and increases the synchronization of the screen display.

[0052] In the second embodiment, the N display module test modules 100 display different test functions. That is, the display module test modules 100 are used to display different test functions according to different test programs. Each display module test module 100 may display the same test function, or a portion of the display module test modules 100 may display one test function, while another portion may display a different test function. For example, X out of N display module test modules 100 may all perform RGB color and brightness tests, and Y out of N display module test modules 100 may all perform infrared thermal sensing tests, etc. Then, the detection results of each display module test module are obtained accordingly.

[0053] Please see Figure 2 In the third embodiment, each of the N display module test modules 100 sequentially displays different test functions, that is, at the first test station ( Figure 2 At workstation 1), the first display module test module performs the first test function test according to the first test program. After completing the test at the current test workstation, the first display module test module sends test completion information to the second display module test module, and simultaneously rotates to the second test workstation. Figure 2 The second display module test module enters the second test station (station 2) based on the first test completion information and performs the second test function test according to the second test program. After completing the test at the current test station, the second display module test module sends the second test completion information to the third display module test module 100, and simultaneously rotates to the third test station (station 2). Figure 2 At workstation 3).

[0054] When the first display module test module rotates to the second test station, it performs the second test function test according to the second test procedure. After completing the test at the current test station, the first display module test module sends the second test completion information to the second display module test module, so that the second display module test module can start the third function test. Simultaneously, the first display module test module rotates to the third test station and continues to perform the third function test and rotate, until each display module test module 100 has completed all test functions. Figure 2 The drawing only shows 6 workstations, but in reality there could be N.

[0055] This invention not only allows for the sequential execution of different test procedures within multiple display module test modules 100 and the corresponding obtaining of test results, but also enables each of the multiple display module test modules 100 to display different test functions according to different test procedures and obtain corresponding test results. This achieves simultaneous display of different test functions across multiple display module test modules 100, saving testing costs and improving testing efficiency. Furthermore, the automatic generation of test results effectively improves accuracy.

[0056] This means that it can not only simultaneously detect the same function of multiple display modules, but also simultaneously detect different functions of multiple display modules, enabling simultaneous detection of cascaded display modules. This effectively speeds up the detection process, making the camera-based cascaded display module detection device applicable to production aging tests and counter displays, among other application scenarios.

[0057] Furthermore, each display module testing module in this invention is a portable display module testing device based on a camera. It can not only test the display effect of the device to be tested, such as the display module, saving testing time and cost, but also reduce the size, making it easy to carry and use.

[0058] Moreover, the portable display module inspection device based on the camera can inspect the appearance of the display module, such as the detection of workpiece appearance defects, color difference and bumps. By combining deep learning with traditional vision algorithms and using a high-definition industrial camera, feature fusion and detection result classification are achieved, enabling rapid comparison and classification of product appearance defects.

[0059] Furthermore, please continue reading Figure 2Each display module test module 100 includes: a display unit 110, a camera unit 120, a main control unit 130, and an automatic optical inspection unit 140; the display unit 110 is connected to the camera unit 120 and the main control unit 130 respectively, and the display unit 110, the automatic optical inspection unit 140 and the main control unit 130 are connected in sequence;

[0060] The main control unit 130 is used to detect the parameters of the camera unit 120 using a detection program, and then provide a screen test signal to the display unit 110 based on the parameters; the display unit 110 is used to display images or videos based on the screen test signal; the camera unit 120 is used to capture images or videos in the display unit 110 and then generate a detection signal to the automatic optical detection unit 140; the automatic optical detection unit 140 is used to transmit the detection signal to the main control unit 130; the main control unit 130 is also used to generate corresponding detection results based on the detection signal.

[0061] The main control unit 130 adopts a high-performance CPU combined with an FPGA architecture; the detection signals include: RGB color signals, brightness information, infrared thermal information, and wide dynamic range signals; the display unit 110 includes: a display module, namely a display module that supports DSC compression (Display Stream Compression), that is, a display module that supports DSC encoding for high-resolution, high-refresh-rate screens, such as a mobile phone screen assembly; the camera unit 120 includes: a wide dynamic range camera, a strong light suppression camera, an image camera, an area array camera, a monochrome camera, a single-chip color camera, a 3CCD color camera, a line array camera, a 3Line color camera, and an infrared thermal camera.

[0062] Among them, digital cameras integrate A / D conversion circuits internally, which can directly convert analog image signals into digital information; the pixels of an area array camera are arranged neatly in rows and columns, with each pixel corresponding to one pixel in the image; each pixel of a single-chip color camera actually corresponds to only one of the three types of pixels, R, G, and B, which are arranged according to a certain pattern; each pixel of a 3CCD color camera corresponds to three photosensitive elements, R, G, and B, and a beam splitter is used to refract the incident light onto three CCD target surfaces, which are then photoelectrically converted to obtain the values ​​of the three colors, R, G, and B; the pixels of a line array camera are arranged in a one-dimensional line, that is, there is only one row of pixels, and only one row of image data can be collected at a time; the monochrome camera, which is also the most commonly used line array camera, has one pixel corresponding to one pixel, and the acquired image is grayscale; the 3Line color camera has three rows of pixels, R, G, and B, which are sensitive to red, green, and blue wavelengths of light, respectively, so each pixel corresponds to the values ​​of the three channels, R, G, and B, forming color image data.

[0063] Specifically, the following steps are involved in the functional testing of each display module test module 100:

[0064] First, the main control unit 130 (a high-performance CPU combined with an FPGA architecture) uses a detection program to detect the parameters of all the camera units 120, that is, to detect the functions of multiple different types of camera units 120, and generate various screen test signals accordingly. For example, it detects the parameters of wide dynamic range cameras, strong light suppression cameras, image cameras, area array cameras, monochrome cameras, single-chip color cameras, 3CCD color cameras, line array cameras, 3Line color cameras, and infrared thermal cameras separately, and transmits the screen test signals to the display unit 110. For example, for camera units 120 that collect RGB color and brightness information, the main control unit 130 provides screen test signals such as color coordinate parameters and brightness parameters for displaying different images. For camera units 120 that collect infrared thermal information, the main control unit 130 provides screen test signals for infrared thermal information. Then, the main control unit 130 provides various screen test signals to the display unit 110 (which belongs to a high-resolution and high-refresh-rate display module) according to the parameters.

[0065] Secondly, the display unit 110 displays images or videos after receiving the screen test signal, and the camera unit 120 captures images or videos in the display unit 110 connected to it, and generates detection signals (RGB color signals, brightness information, infrared thermal information, and wide dynamic range signals, etc.) accordingly. The detection signals are then transmitted to the main control unit 130 through the automatic optical detection unit 140. Finally, the main control unit 130 generates corresponding detection results (e.g., color abnormality, brightness abnormality, MURA abnormality, short circuit, and overcurrent, etc.) based on the detection signals, and performs corresponding processing based on the detection results (e.g., short circuit, overcurrent fault, and MURA abnormality processing of electronic components).

[0066] For example, for an image camera, it is necessary to collect RGB color and brightness information, color coordinate parameters and brightness parameters of different images displayed on the display unit 110 through the camera. Then, a color processing APP (fault handling program) is used to complete color-related processing, such as GAMMA calibration (RGB values ​​and power are not a simple linear relationship, but a power function relationship. The exponent of this function is called the Gamma value, which is generally 2.2. This conversion process is called Gamma calibration) and MURA calibration (MURA refers to the phenomenon of uneven brightness of the display, causing various marks). For an infrared thermal camera, it is necessary to collect infrared thermal information on the display unit 110 through the camera. Then, a hardware fault handling APP (fault handling program) is used to determine whether the infrared thermal camera has an abnormal heating area and complete the fault handling, such as short circuit of electronic components, overcurrent fault and MURA fault handling.

[0067] In this invention, a main control unit 130 with a high-performance CPU combined with an FPGA architecture is used to detect the parameters of the camera unit 120, and the main control unit 130 generates corresponding detection results based on the detection signals. This enables the rapid and efficient detection of the parameters of the camera unit 120, and can automatically adapt to different types of camera units 120 to generate corresponding screen test signals to the display unit 110.

[0068] Furthermore, the automatic optical inspection unit 140 includes an AOI device; the AOI device is connected to the display unit 110 and the main control unit 130 respectively.

[0069] AOI stands for Automated Optical Inspection, which is a device that uses optical principles to detect common defects encountered in welding production.

[0070] Specifically, the display unit 110 in this invention is first installed on the AOI device, and then connected to the main control unit 130 by cascading the AOI devices. That is, the AOI devices on every two main control units 130 are connected in pairs by wireless or wired means, thereby forming an interconnected and intelligent working mode.

[0071] Please see Figure 3 The present invention provides a camera-based cascaded display module detection method for the camera-based cascaded display module detection device described above. The camera-based cascaded display module detection method includes:

[0072] S10. In the first test phase, the first display module test module displays the first test function according to the first test program and obtains the first test result. When the first test result is normal, it sends the first test completion information to the second display module test module.

[0073] Specifically, the camera-based cascaded display module detection method is implemented based on the camera-based cascaded display module detection device, and is more consistent with the third embodiment of the present invention. The implementation process of the camera-based cascaded display module detection method is as follows:

[0074] At the first test station, i.e. in the first test phase, the first display module test module displays the first test function according to the first test program, obtains the first test result, and sends the first test completion information to the second display module test module when the first test result is normal, so that the second display module test module can enter the second test station according to the first test completion information and start the second phase test.

[0075] In this invention, different functional tests are performed on different display module test modules 100 at different stages, and the second display module test module only starts the next stage of testing after the previous display module test module has completed the previous test program. This effectively avoids program conflicts caused by testing different programs at the same time when testing multiple display module test modules 100 individually.

[0076] Furthermore, please refer to Figure 4 S10, in the first testing phase, the first display module testing module obtains a first detection result after displaying the first test function according to the first test program, and sends a first test completion message to the second display module testing module when the first detection result is normal, specifically includes the following steps:

[0077] S11. In the first test phase, the first main control unit in the first display module test module uses the first test program to detect the parameters of the first camera unit in the first display module test module.

[0078] S12, The first camera unit transmits the first screen test signal generated according to the parameters to the first display unit in the first display module test module;

[0079] S13. The first display unit displays an image or video based on the first screen test signal;

[0080] S14. After the first camera unit in the first display module test module captures the image or video in the first display unit, it generates a first detection signal.

[0081] S15, The first camera unit transmits the first detection signal to the first main control unit through the automatic optical detection unit in the first display module test module;

[0082] S16. The first main control unit generates the first detection result based on the first detection signal, and sends the first test completion information to the second main control unit in the second display module test module when the first detection result is normal.

[0083] Specifically, at the first test station, i.e., in the first test phase, the first main control unit in the first display module test module first uses the first test program to detect the parameters of the first camera unit in the first display module test module. That is, in the first display module test module, the first main control unit uses the first test program to detect the parameters of the first camera unit and generates a first screen test signal based on the parameters, so that the corresponding test program can be updated and configured according to the parameters of different camera units 120. Then, the first camera unit transmits the first screen test signal to the first display unit in the first display module test module, and the first display unit displays an image or video based on the first screen test signal.

[0084] Secondly, the first camera unit in the first display module test module captures an image or video of the first display unit and generates the first detection signal, i.e., the first detection signal is obtained after analyzing the image or video of the first display unit; furthermore, the first camera unit transmits the first detection signal to the first main control unit through the automatic optical detection unit in the first display module test module; finally, the first main control unit generates the first detection result based on the first detection signal, and sends the first test completion information to the second main control unit in the second display module test module when the first detection result is normal. At the same time, the first display module test module rotates to the second test station so that it can perform the second test function test simultaneously with the second display module test module.

[0085] In this invention, the first display module test module generates the first detection signal after displaying the first screen test signal in the first test stage, and finally obtains the first detection result. When the first detection result is normal, the first test completion information is sent to the second main control unit in the second display module test module, so that the second display module test module can start the second stage of testing. That is, based on the first test completion information sent by the first display module test module after obtaining the normal first detection result, the second display module test module starts the next stage of testing, thereby effectively avoiding test conflicts during the testing process and effectively improving testing efficiency and accuracy.

[0086] For further information, please refer to [link / reference]. Figure 3 S20, the second display module test module starts the second stage test according to the first test completion information. After the second test module displays the second test function according to the second test program, it obtains the second test result and sends the second test completion information to the third display module test module when the second test result is normal.

[0087] Specifically, after the first display module testing module sends the first test completion information to the second display module testing module when the first test result is normal, the second display module testing module enters the second testing station and begins the second stage test according to the first test completion information. That is, after the second test function is displayed according to the second test program, the second test result is obtained, and when the second test result is normal, the second test completion information is sent to the third display module testing module, so that the third display module testing module enters the third testing station and begins the third stage test.

[0088] Furthermore, while the second display module testing module is performing the second stage test, the first display module testing module is simultaneously performing the second stage test at the second workstation.

[0089] Furthermore, please refer to Figure 5 The specific steps of S20, where the second display module test module starts the second stage test based on the first test completion information, the second display module test module obtains the second detection result after displaying the second test function according to the second test program, and sends the second test completion information to the third display module when the second detection result is normal, include:

[0090] S21. After receiving the first test completion information, the second main control unit uses the second test program to detect the parameters of the second camera unit in the second display module test module.

[0091] S22, The second camera unit transmits the generated second screen test signal to the second display unit in the second display module test module;

[0092] S23. The second display unit displays images or videos according to the second screen test signal;

[0093] S24. After the second camera unit in the second display module captures the image or video in the second display unit, it generates a second detection signal.

[0094] S25, the second camera unit transmits the second detection signal to the second main control unit through the second automatic optical detection unit in the second display module test module;

[0095] S26. The second main control unit generates the second detection result based on the second detection signal, and sends the second test completion information to the third main control unit in the third display module test module when the second detection result is normal.

[0096] Specifically, similarly, when the second display module test module begins the second testing phase at the second test station, firstly, the second main control unit in the second display module test module uses the second test program to detect the parameters of the second camera unit in the second display module test module. That is, in the second display module test module, the second main control unit uses the second test program to detect the parameters of the second camera unit and generates a second screen test signal based on the parameters, so that the corresponding test program can be updated and configured according to the parameters of different camera units 120. Then, the second camera unit transmits the second screen test signal to the second display unit in the second display module test module, and the second display unit displays images or videos based on the second screen test signal.

[0097] Secondly, the second camera unit in the second display module test module captures images or videos of the second display unit and generates the second detection signal, i.e., the second detection signal is obtained after analyzing the images or videos of the second display unit. Next, the second camera unit transmits the second detection signal to the second main control unit via the second automatic optical detection unit in the second display module test module. Finally, the second main control unit generates the second detection result based on the second detection signal, and when the second detection result is normal, sends the second test completion information to the third main control unit in the third display module test module. Simultaneously, the second display module test module rotates to the third test station to perform the third test function test.

[0098] For further information, please refer to [link / reference]. Figure 3 S30, the third display module test module begins the third stage test based on the second test completion information, until the test of all display module test modules 100 is completed.

[0099] Specifically, after the second display module test module sends the second test completion information to the third display module test module when the second test result is normal, the third display module test module enters the third test station and begins the third stage test according to the second test completion information. That is, after the third test function is displayed according to the third test program, the third test result is obtained, and when the third test result is normal, the third test completion information is sent to the fourth display module test module, so that the fourth display module test module enters the fourth test station and begins the fourth stage test, until the test of all display module test modules 100 is completed.

[0100] Furthermore, while the third display module testing module is performing the third stage test, the first display module testing module and the second display module testing module are simultaneously performing the third stage test at the third workstation.

[0101] Furthermore, please refer to Figure 6 The method for detecting cascaded display modules based on cameras further includes:

[0102] A10. In the first testing phase, the first display module testing module displays the first test function according to the first test program and obtains the first test result. When the first test result is abnormal, it sends the first test abnormality information to the second display module testing module.

[0103] A20. The second display module test module records the first test anomaly information and starts the second stage test. The second display module test module obtains the second test result after displaying the second test function according to the second test program.

[0104] A30. When the second detection result is abnormal, the second display module test module sends the first test abnormality information and the second test abnormality information to the third display module test module.

[0105] A40. The third display module test module records the first test exception information and the second test exception information, and begins the third stage test until all display module test modules 100 have been tested.

[0106] Specifically, at the first test station, that is, in the first test phase, the first display module test module displays the first test function according to the first test program, obtains the first test result, and sends the first test error information to the second display module test module when the first test result is abnormal; while if the first test result is normal, the first display module test module sends the first test completion information to the second display module test module.

[0107] Then, the second display module test module records the first test exception information and continues to perform the second stage test. Similarly, the second display module test module displays the second test function according to the second test program, obtains the second detection result, and sends the second test exception information to the third display module test module when the second detection result is abnormal; if the second detection result is normal, the second display module test module sends the second test completion information to the third display module test module.

[0108] Secondly, when the second detection result is abnormal, the second display module test module further sends the first test abnormality information and the second test abnormality information to the third display module test module. The third display module test module records the first test abnormality information and the second test abnormality information, and starts the third stage test until the test of all display module test modules 100 is completed. Finally, the Nth display module test module 100 records the abnormalities of the detection results of all previous display module test modules 100.

[0109] In this invention, when an abnormal situation occurs during the current stage of testing of a previous display module test module, an abnormal information is sent to the next display module test module. This allows the next display module test module to record the abnormal information of the test results of all previous display module test modules 100. This enables a simple and direct observation of the test status of all display module test modules 100, facilitating targeted repairs by professionals and saving repair time and costs.

[0110] In summary, this invention provides a camera-based cascaded display module testing device and method. The camera-based cascaded display module testing device includes N display module testing modules. Each pair of display module testing modules is connected to each other. Each display module testing module is used to display different test functions according to different test programs and obtain corresponding test results. This invention achieves simultaneous testing of multiple display module testing modules for different functions according to different test programs, effectively improving testing efficiency, saving testing costs, and realizing an intelligent working mode due to the interconnection between multiple display module testing modules.

[0111] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A camera-based cascade display module detection device, characterized in that, The camera-based cascaded display module detection device comprises: N display module test modules; each two of the display module test modules are connected to each other, and the display module test modules are used to correspondingly display different test functions according to different test procedures, and then detection results are obtained correspondingly; The display module test module is also used to display the same test function according to the same test procedure, and one of the display module test modules controls other display module test modules to display the same screen function through a cascaded connection channel; Different test functions are displayed on the plurality of display module test modules respectively; Each display module test module comprises: a display unit, a camera unit, a master control unit and an automatic optical detection unit; the display unit is connected with the camera unit and the master control unit respectively, and the display unit, the automatic optical detection unit and the master control unit are connected in sequence; The master control unit is used to detect parameters of the camera unit by using a detection program, and provide a screen test signal to the display unit according to the parameters; the display unit is used to display images or videos according to the screen test signal; the camera unit is used to shoot images or videos in the display unit, and generate a detection signal to the automatic optical detection unit; the automatic optical detection unit is used to transmit the detection signal to the master control unit; the master control unit is also used to generate a corresponding detection result according to the detection signal; wherein the detection signal comprises: an RGB color signal, brightness information, infrared thermal information and a wide dynamic range signal; The display module test module combines deep learning and traditional visual algorithm, and cooperates with a high-definition industrial camera to perform feature fusion and detection result classification, and rapidly compare and classify product appearance defects; The master control units in each two of the display module test modules are connected to each other in a wireless or wired manner; the master control unit adopts a high-performance CPU combined with a PGFA architecture; The master control unit with the high-performance CPU combined with the FPGA architecture detects parameters of the camera unit, and generates a corresponding detection result according to the detection signal through the master control unit. 2.The camera-based cascade display module detection device of claim 1, wherein, The display unit comprises a display module with high resolution and high refresh rate. 3.The camera-based cascade display module detection device of claim 1, wherein, The camera unit comprises: a wide dynamic camera, a strong light suppression camera, an image camera, a face array camera, a black and white camera, a single-chip color camera, a 3CCD color camera, a line array camera, a 3Line color camera and an infrared thermal camera. 4.The camera-based cascade display module detection device of claim 1, wherein, The automatic optical detection unit comprises an AOI device; the AOI device is connected with the display unit and the master control unit respectively.

5. A camera-based cascade display module detection method based on the camera-based cascade display module detection device of any one of claims 1-4, characterized in that, The camera-based cascaded display module detection method comprises: In a first test stage, a first display module test module displays a first test function according to a first test procedure to obtain a first detection result, and sends first test completion information to a second display module test module when the first detection result is normal; The second display module test module starts the second stage test according to the first test completion information, obtains a second detection result after the second display module test module displays a second test function according to a second test program, and sends second test completion information to a third display module test module when the second detection result is normal; The third display module test module starts the third stage test according to the second test completion information until the test of all display module test modules is completed. 6.The camera-based cascaded display module detection method of claim 5, wherein, The method further includes the following steps: In the first test stage, a first display module test module obtains a first detection result after displaying a first test function according to a first test program, and sends first test exception information to a second display module test module when the first detection result is abnormal; The second display module test module records the first test exception information and starts the second stage test, and obtains a second detection result after a second display module test module displays a second test function according to a second test program; When the second detection result is abnormal, the second display module test module sends the first test exception information and the second test exception information to a third display module test module; The third display module test module records the first test exception information and the second test exception information and starts the third stage test until the test of all display module test modules is completed.

7. The camera-based cascaded display module detection method of claim 5, wherein, The step of sending first test completion information to a second display module test module when the first detection result is normal in the first test stage includes the following steps: In the first test stage, a first main control unit in the first display module test module detects parameters of a first camera unit in the first display module test module by using a first test program; The first main control unit transmits a first screen test signal generated according to the parameters to a first display unit in the first display module test module; The first display unit displays images or videos according to the first screen test signal; After the first camera unit in the first display module test module captures the images or videos in the first display unit, the first camera unit generates a first detection signal; The first camera unit transmits the first detection signal to the first main control unit through a first automatic optical detection unit in the first display module test module; The first main control unit generates the first detection result according to the first detection signal, and sends the first test completion information to a second main control unit in the second display module test module when the first detection result is normal. 8.The camera-based cascaded display module detection method of claim 7, wherein, The step of starting the second stage test according to the first test completion information by the second display module test module includes the following steps: The second master control unit receives the first test completion information, and detects parameters of a second camera unit in the second display module test module by using a second test program; The second master control unit transmits the generated second screen test signal to a second display unit in the second display module test module; The second display unit displays images or videos according to the second screen test signal; After the second camera unit in the second display module test module captures the images or videos in the second display unit, the second camera unit generates a second detection signal; The second camera unit transmits the second detection signal to the second master control unit through a second automatic optical detection unit in the second display module test module; The second master control unit generates the second detection result according to the second detection signal, and sends the second test completion information to a third master control unit in a third display module test module when the second detection result is normal.

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