Screen display picture quality detection platform

Abstract

The utility model discloses a screen display picture quality detection platform which comprises a mobile detection workbench, a first visual detection device, a second visual detection device, a detection control module and a display driving module, a first detection position and a second detection position are arranged on the left side and the right side of the mobile detection workbench, and the first detection position is provided with a screen positioning concave position. The mobile detection workbench is provided with a surface film adsorption window on the outer side edge of the first detection position, an adsorption plate is arranged in the adsorption window, and adsorption holes are formed in the surface of the adsorption plate; the first visual detection device and the second visual detection device are respectively in linkage displacement by a transverse movement driving device; the detection control module comprises a displacement control module, an image acquisition module and an instruction sending module, and the display driving module is provided with an instruction receiving module. According to the invention, two screens can be detected at the same time, and for a large screen, a plurality of cameras can be used for cooperation to complete overall detection.

Description

Technical Field

[0001] This invention relates to an automated visual inspection device, and more particularly to a screen display quality inspection platform. Background Art

[0002] With the rapid development of automotive electronics technology, automotive displays have become a key factor in enhancing the driving experience and vehicle functionality. From the initial mechanical pointer gauges to today's intelligent touchscreens, automotive screens have not only increased significantly in size but also become increasingly feature-rich, covering diverse content such as navigation, video playback, and entertainment games. However, as the application of displays in automobiles becomes more widespread, their quality inspection and production efficiency have become significant challenges for automakers and suppliers.

[0003] In traditional automotive display production lines, quality inspection primarily relies on manual operation. Inspectors visually assess the display's performance under various screen conditions, such as bright spots, dark spots, and color uniformity, to determine its quality. However, this method has several drawbacks: manual operation is prone to fatigue, and inspection accuracy and efficiency significantly decrease after prolonged work; the precision of the human eye is limited, making it difficult to accurately identify minute defects and foreign objects; manual inspection is subjective, resulting in poor consistency and difficulty in guaranteeing the accuracy of inspection results; and since manual inspection typically only checks one screen at a time, overall inspection efficiency is low, making it difficult to meet the needs of large-scale production lines.

[0004] To address the low efficiency of traditional display screen quality inspection, visual inspection technology has emerged in the industrial inspection field due to its advantages of high precision, high efficiency, and high adaptability. Visual inspection platforms utilize high-precision industrial cameras, computer vision algorithms, and intelligent analysis software to achieve real-time inspection, identification, and classification of products on the production line. Intelligent analysis using computer vision algorithms enables high-precision real-time monitoring and intelligent management of display screen quality. However, the application of visual inspection technology in automotive display screen inspection also faces some challenges, such as the low efficiency caused by inspecting only one screen at a time, and limitations in inspecting the large-sized screens used in new energy vehicles. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a screen display quality testing platform that can test two screens simultaneously and is applicable to the testing of large screens.

[0006] To address the aforementioned technical problems, this invention provides a screen display quality testing platform, characterized by comprising a mobile testing workbench, a first visual testing device, a second visual testing device, a testing control module, and a display driving module. The mobile testing workbench is provided with a first testing position and a second testing position arranged symmetrically on its left and right sides. The first testing position has a screen positioning recess, and a recess for placing the display driving module is provided below the screen positioning recess. The recess is fixedly connected to the mobile testing workbench. A film adsorption window is provided on the outer side of the first testing position on the mobile testing workbench. An adsorption plate is provided within the adsorption window, and adsorption holes are provided on the surface of the adsorption plate, with the adsorption holes connected to a negative pressure source.

[0007] The first visual detection device and the second visual detection device are respectively slidably mounted on the first horizontal sliding rail and the second horizontal sliding rail arranged in parallel vertically. The first visual detection device and the second visual detection device are respectively displaced by the horizontal driving device.

[0008] The detection and control module includes a displacement control module, an image acquisition module, and an instruction sending module. The display driving module has an instruction receiving module. Both the first and second visual detection devices have a main camera and a secondary camera. The displacement control module is electrically connected to the transverse movement driving device. The image acquisition module is electrically connected to the main camera and the secondary camera. The instruction sending module is electrically connected to the instruction receiving module. The display driving module is electrically connected to the screen to be inspected. The main camera is a 65M monochrome camera used to detect minor defects such as uneven brightness on the display. The secondary camera is a color camera used to detect color defects.

[0009] Furthermore, the first and second transverse slide rails are mounted on a side panel, and a global camera is also mounted in the center of the side panel. The main camera and the global camera are vertically downward, while the secondary camera is obliquely positioned. The global camera is fixed to the center of the side panel by a cantilever, which forms a passageway between the global camera and the side panel for the first and second visual inspection devices. The global camera is electrically connected to the image acquisition module. The global camera is a color camera with a field of view of 1.5 meters, and the secondary camera has a field of view of 400*300mm. When the product display area exceeds 800mm and cannot be covered by two sets of cameras, the global camera can assist in detecting large defects in the uncovered areas.

[0010] Furthermore, both the first and second transverse slide rails are slidably provided with a sliding plate. The first and second visual detection devices are respectively fixedly mounted on the sliding plate. The sliding plate is connected to an "L"-shaped guide plate, which is used to allow the sliding plate to pass through the cantilever.

[0011] Furthermore, the surface of the conductor plate has grooves for placing ribbon cables.

[0012] Furthermore, the top of the conductor plate is bent backward at a 90-degree angle.

[0013] Furthermore, a contact sensor is provided between the first transverse slide rail and the second transverse slide rail, and the contact sensor is electrically connected to the displacement control module.

[0014] Furthermore, the system also includes a light source module. The length of the light source module is greater than the lateral length of the first and second detection positions. The light source module is vertically slidably mounted on the frame via a lifting frame, which is linked by a lifting drive device. The detection control module also includes a light source switching module. The light source module, the lifting drive device, and the displacement control module are electrically connected. The light source module is used to extract images of dust on the display screen and record the contour and image coordinates of the dust area to avoid interference with the normal display screen.

[0015] Furthermore, it also includes a mobile inspection workbench that is slidably mounted on the frame via a longitudinal slide rail and is displaced in conjunction with a longitudinal drive device, the longitudinal drive device being electrically connected to the displacement control module.

[0016] Furthermore, the frame has a first working position and a second working position. The displacement control module controls the longitudinal drive device to drive the moving detection stage from the first working position to the second working position. The first visual inspection device, the second visual inspection device, and the global camera are arranged above the second working position. Ion bars are arranged on both sides of the moving detection stage at the first working position.

[0017] Furthermore, a QR code reading device is provided above the first workstation to scan the QR code on the screen to be tested on the mobile testing workbench.

[0018] Implementing the embodiments of the present invention has the following beneficial effects: the structure of the present invention can detect two screens simultaneously, and for large screens, multiple cameras can be used in conjunction to complete the overall detection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the mobile inspection workbench;

[0021] Figure 3 This is a schematic diagram of the structure of the first vision detection device and the second vision detection device;

[0022] Figure 4 This is a schematic diagram of the conductor plate structure;

[0023] Figure 5 This is a structural diagram of the light source module. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Combination Figure 1 The diagram shows the overall structure of this utility model.

[0026] This embodiment of a screen display quality testing platform includes a mobile testing workbench 1, a first visual testing device 2, a second visual testing device 3, a testing control module, and a display driving module.

[0027] like Figure 2 As shown, the mobile testing workbench 1 has a first testing position 11 and a second testing position 12 arranged symmetrically on the left and right sides. Both the first testing position 11 and the second testing position 12 have screen positioning recesses 13. Below the screen positioning recesses 13, there is a recess 14 that is fixed to the mobile testing workbench 1. The display driver module of the screen to be tested is placed in the recess 14. The side of the screen positioning recesses 13 has a notch 15 for accommodating the ribbon cable of the screen to be tested.

[0028] During the testing of the display quality of the screen to be tested, the surface film needs to be temporarily removed to avoid affecting the testing structure. After the test, the original surface film is reattached to the screen. The movable testing stage 1 is provided with a surface film adsorption window 16 on the outer side of the first testing position. An adsorption plate 17 is provided inside the adsorption window 16. The surface of the adsorption plate 17 is provided with adsorption holes, which are connected to a negative pressure source. The torn surface film is adsorbed onto the adsorption plate 17. After the test is completed and the movable testing stage 1 returns to the first working position, the adsorption plate 17 is disconnected from the negative pressure source, the surface film is released from adsorption, and can be reattached to the screen.

[0029] The mobile inspection workbench 1 is slidably mounted on the frame via the longitudinal slide rail 18 and is moved in conjunction with the longitudinal drive device 19.

[0030] like Figure 1 As shown, the frame has a first working position 1a and a second working position 1b. The longitudinal drive device 19 moves the detection stage 1 from the first working position 1a to the second working position 1b. Ion bars 1c are arranged on both sides of the moving detection stage at the first working position 1a.

[0031] A QR code reader 1d is installed above the first working position 1a to scan the QR code on the screen to be tested on the moving detection workbench.

[0032] The first visual detection device 2 and the second visual detection device 3 have the same configuration and are respectively set on the first transverse slide rail 21 and the second transverse slide rail 31 arranged in parallel. The first visual detection device 2 and the second visual detection device 3 are respectively moved by the transverse drive devices 22 and 32.

[0033] Combination Figure 3 The frame is provided with a side plate, and the first transverse slide rail 21 and the second transverse slide rail 31 are provided on the side plate. The first vision detection device 2 and the second vision detection device 3 each have a main camera 2a and a secondary camera 2b. The main camera 2a and the secondary camera 2b are both provided in the sliding plate 23. The sliding plate 23 is slidably connected to the first transverse slide rail 21. The transverse drive device 22 is a lead screw drive motor, which moves the sliding plate 23 through the lead screw linkage.

[0034] The main camera 2a is a 65M monochrome camera used to detect minor defects such as uneven brightness on the display. The secondary camera 2b is a color camera used to detect color defects. The secondary camera 2b is set at an angle towards the center.

[0035] The second visual inspection device 3 has the same implementation structure as the first visual inspection device 2, and also has a main camera 3a and a secondary camera 3b.

[0036] A global camera 4 is also installed in the middle of the side panel. The field of view of the global camera 4 is 1.5 meters. The main camera 2a and the global camera 4 are set vertically downward. The global camera 4 is fixed in the middle of the side panel by a cantilever 41. The cantilever 41 forms a passage between the global camera 4 and the side panel for the first visual detection device 2 and the second visual detection device 3, avoiding interference. At the same time, it can realize the combination of the main camera and the secondary camera of the first visual detection device 2 and the second visual detection device 3 into a whole. The detection field of view of the main camera and the secondary camera is 400*300mm. It can be used to display screens with a display area of ​​more than 800mm. When the two sets of cameras cannot cover the area, the global camera 4 can assist in detecting large defects in the uncovered area.

[0037] like Figure 4 As shown, in order for the first visual inspection device 2 and the second visual inspection device 3 to pass through the channel, the sliding plate 23 is connected to an "L"-shaped guide plate 24. The top of the guide plate 24 is bent backward at 90 degrees so that the sliding plate 23 can pass through the cantilever 41. The surface of the guide plate 24 has a groove 25 for placing the ribbon cable.

[0038] To prevent collisions between the first visual detection device 2 and the second visual detection device 3, a contact sensor 26 is provided between them.

[0039] like Figure 5 As shown, in order to avoid the dust on the screen to be tested from interfering with the test results, this embodiment also includes a light source module 5. The length of the light source module 5 is greater than the lateral length of the first detection position 11 and the second detection position 12. The light source module 5 is vertically slidably mounted on the frame through the lifting frame 51. The lifting frame 51 is linked by the lifting drive device 52. The light source module 5 illuminates the screen so that the camera can identify and acquire the dust on its surface.

[0040] This utility model also includes a detection and control module, which includes a displacement control module, an image acquisition module, an instruction sending module, a light source switching module, and a QR code reading device 1d. The display driving module has an instruction receiving module. The displacement control module is electrically connected to the horizontal driving devices 22 and 32, the vertical driving device 19, and the contact sensor 26. The image acquisition module is electrically connected to the main camera 2a and the secondary camera 2b of the first visual detection device 2 and the second visual detection device 3, and is also electrically connected to the global camera 4. The instruction sending module is electrically connected to the instruction receiving module. The light source switching module, the lifting driving device, and the displacement control module are electrically connected.

[0041] During testing, the display screen to be tested is placed in the screen positioning recess 13 and connected to the display driving module in the recess 14. The surface mold of the display screen to be tested is peeled off and adsorbed onto the adsorption plate 17. The QR code reading device 1d scans the two dimensions of the screen to be tested to record the test results. The displacement control module moves the moving testing worktable 1 from the first working position 1a to the second working position 1b. The displacement control module also controls the lifting drive device 52 to lower the lifting frame 51 to the side of the display screen to be tested. The light source switching module turns on the light source module 5 to illuminate the screen. The main camera 2a takes a picture of the unlit screen. The image acquisition module obtains the image, extracts the dust area, and records the outline and image coordinates of these areas. The light source switching module turns off the light source module 5 and raises it. The command sending module interfaces with the command receiving module to control the screen to display different colors. The image acquisition module obtains color images to identify color defects. After the test is completed, the displacement control module outputs the screen that has completed the test.

[0042] When the screen is greater than 400mm but less than 800mm, the displacement control module controls the horizontal movement drive devices 22 and 32 to bring the first visual detection device 2 and the second visual detection device 3 closer together, and the two work together to complete the above detection.

[0043] When the display area exceeds 800mm, and the first visual inspection device 2 and the second visual inspection device 3 cannot cover it when spliced ​​together, a global camera is used to assist in the detection of large defects in the uncovered area.

[0044] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A screen display quality testing platform, characterized in that, The device includes a mobile inspection worktable, a first vision inspection device, a second vision inspection device, an inspection control module, and a display driving module. The mobile inspection worktable has a first inspection position and a second inspection position arranged symmetrically on the left and right sides. The first inspection position has a screen positioning recess, and a recess for placing the display driving module is arranged below the screen positioning recess. The recess is fixedly connected to the mobile inspection worktable. The mobile inspection worktable has a film adsorption window arranged on the outer side of the first inspection position. An adsorption plate is arranged in the adsorption window, and an adsorption hole is arranged on the surface of the adsorption plate. The adsorption hole is connected to a negative pressure source. The first visual detection device and the second visual detection device are respectively slidably mounted on the first horizontal sliding rail and the second horizontal sliding rail arranged in parallel vertically. The first visual detection device and the second visual detection device are respectively displaced by the horizontal driving device. The detection and control module includes a displacement control module, an image acquisition module, and an instruction sending module. The display driving module has an instruction receiving module. Both the first visual detection device and the second visual detection device have a main camera and a secondary camera. The displacement control module is electrically connected to the transverse movement driving device. The image acquisition module is electrically connected to the main camera and the secondary camera. The instruction sending module is electrically connected to the instruction receiving module. The display driving module is electrically connected to the screen to be detected.

2. The screen display quality testing platform according to claim 1, characterized in that, The first and second transverse slide rails are mounted on a side panel. A global camera is also mounted in the middle of the side panel. The main camera and the global camera are mounted vertically downwards, and the secondary camera is mounted obliquely. The global camera is fixedly mounted in the middle of the side panel by a cantilever. The cantilever forms a passage between the global camera and the side panel for the first and second visual detection devices. The global camera is electrically connected to the image acquisition module.

3. The screen display quality testing platform according to claim 2, characterized in that, Both the first and second transverse slide rails are slidably provided with a sliding plate. The first and second visual detection devices are respectively fixedly mounted on the sliding plate. The sliding plate is connected to an "L"-shaped guide plate, which is used to allow the sliding plate to pass through the cantilever.

4. The screen display quality testing platform according to claim 3, characterized in that, The surface of the conductor plate has grooves for placing ribbon cables.

5. The screen display quality testing platform according to claim 4, characterized in that, The top of the conductor plate is bent backward at a 90-degree angle.

6. The screen display quality testing platform according to claim 5, characterized in that, A contact sensor is provided between the first transverse slide rail and the second transverse slide rail, and the contact sensor is electrically connected to the displacement control module.

7. The screen display quality testing platform according to claim 2, characterized in that, It also includes a light source module, the length of which is greater than the lateral length of the first detection position and the second detection position. The light source module is vertically slidably mounted on the frame via a lifting frame, which is linked by a lifting drive device. The detection control module also includes a light source switching module. The light source module, the lifting drive device, and the displacement control module are electrically connected.

8. The screen display quality testing platform according to claim 7, characterized in that, It also includes a mobile inspection workbench that is slidably mounted on the frame via a longitudinal slide rail and moved in conjunction with a longitudinal drive device, which is electrically connected to the displacement control module.

9. The screen display quality testing platform according to claim 8, characterized in that, The frame has a first working position and a second working position. The displacement control module controls the longitudinal drive device to drive the moving detection stage from the first working position to the second working position. The first visual inspection device, the second visual inspection device, and the global camera are arranged above the second working position. Ion bars are arranged on both sides of the moving detection stage at the first working position.

10. The screen display quality testing platform according to claim 9, characterized in that, A QR code reader is provided above the first workstation to scan the QR code on the screen to be tested on the mobile testing worktable.

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