A tablet screen and camera testing device

Abstract

This invention discloses a tablet computer screen and camera testing device, including a cabinet with a material loading port and a rotary feeding mechanism inside. The output end of the rotary feeding mechanism has a product fixture. The cabinet includes an initial test position, a first test position, a second test position, and a third test position. The rotary feeding mechanism can drive the product fixture to sequentially move to the test positions of the first, second, and third test positions. The initial test position includes a front-facing camera black card testing mechanism; the first test position includes a screen testing mechanism and a flash testing mechanism; the second test position includes a main camera black card testing mechanism, a main camera close-focus testing mechanism, and a front-facing camera fixed-focus testing mechanism; and the third test position includes a main camera telephoto testing mechanism, a main camera white card testing mechanism, and a front-facing camera white card testing mechanism. This invention allows for the completion of multiple functional tests, including camera, flash, and screen, with a single tablet computer clamping, improving testing efficiency and overall production cycle time.

Description

Technical Field

[0001] This invention relates to the field of automated testing equipment technology, and more specifically to a tablet computer screen and camera testing device. Background Technology

[0002] Quality inspection is a crucial part of the tablet computer manufacturing process. Effective inspection can eliminate defective products, improve the product pass rate, ensure product stability and reliability, prevent substandard products from entering the market, and thus avoid damage to corporate reputation and consumer rights.

[0003] Screen and camera testing are particularly critical. Traditional methods often rely on manual inspection, making it difficult to guarantee testing efficiency and consistency. While some automated testing equipment has emerged in recent years, most can only perform a single test—either testing only the camera or only the screen. Operators still need to repeatedly move and mount tablets between different devices, resulting in low overall testing efficiency. Summary of the Invention

[0004] To address some or all of the problems existing in the prior art, the present invention provides a tablet computer screen and camera testing device, including a cabinet. The cabinet has multiple openable and closable inspection doors on its side walls. The cabinet has a material discharge port, and a sealing mechanism is provided at a position corresponding to the material discharge port. The sealing mechanism is used to open or close the material discharge port. A rotary feeding mechanism is provided inside the cabinet, and a product clamp is provided at the output end of the rotary feeding mechanism. An initial test position, a first test position, a second test position, and a third test position are sequentially arranged inside the cabinet along the movement direction of the rotary feeding mechanism. The rotary feeding mechanism can drive the product clamp to carry the product to be tested. The test product moves sequentially to the test positions of the first test position, the second test position, and the third test position; the initial test position is directly opposite the feeding port, and the initial test position includes a front-facing black card test mechanism, which is connected to the output end of the sealing mechanism. The sealing mechanism can drive the front-facing black card test mechanism to align with the product on the product fixture; the first test position includes a screen test mechanism and a flash test mechanism; the second test position includes a main camera black card test mechanism, a main camera close-focus test mechanism, and a front camera fixed-focus test mechanism; the third test position includes a main camera telephoto test mechanism, a main camera white card test mechanism, and a front camera white card test mechanism.

[0005] As a further improvement of the present invention, the rotary feeding mechanism includes a hollow rotary table and a rotary drive motor. The hollow rotary table is connected to the cabinet, the output end of the rotary drive motor is connected to the input end of the hollow rotary table, a rotary mounting base is provided on the output end of the hollow rotary table, and the product fixture is connected to the rotary mounting base. The product clamps are four in number, and the four product clamps are distributed at equal intervals along the circumference on the rotary mounting base; The product fixture includes a fixture fixing plate, and the fixture fixing plate is provided with multiple limiting strips, which together form a product limiting groove.

[0006] As a further improvement of the present invention, the sealing mechanism includes a sealing cylinder, and a sealing door is provided on the output end of the sealing cylinder. The sealing cylinder can drive the sealing door to slide laterally, so that the sealing door is closed or the discharge port is opened.

[0007] As a further improvement of the present invention, the front camera black card testing mechanism includes a front camera black card mounting bracket, which is connected to the sealing door, and a front camera test black card is provided on the front camera black card mounting bracket.

[0008] As a further improvement of the present invention, the screen testing mechanism includes a first camera frame and a second camera frame respectively connected to the cabinet. The first camera frame is provided with a camera adjustment mechanism, and a first camera is provided at the output end of the camera adjustment mechanism. The adjustment mechanism is used to adjust the installation height of the first camera on the first camera frame. The first camera is slidably connected to the first camera frame. A second camera is provided on the second camera frame. The first camera is located directly above the product clamp on the rotary feeding mechanism, and the second camera is set at a 45° shooting angle to the side and above the product clamp on the rotary feeding mechanism.

[0009] As a further improvement of the present invention, the flash testing mechanism includes a flash mounting bracket and a gray card mounting bracket. The flash mounting bracket is connected to the cabinet. The flash mounting bracket is provided with a rotatable flash adjustment handwheel. The gray card mounting bracket is provided with a flash adjustment screw. The flash adjustment screw is threadedly connected to the flash adjustment handwheel. The gray card mounting bracket is slidably connected to the flash mounting bracket. The gray card mounting bracket is provided with a test gray card. The test gray card is located directly below the product fixture on the rotary feeding mechanism.

[0010] As a further improvement of the present invention, the front-facing fixed-focus testing mechanism includes a front-facing relay lens and a front-facing fixed-focus light source. A front-facing mounting bracket is provided on the cabinet, and the front-facing relay lens is connected to the front-facing mounting bracket. The rotating feeding mechanism can drive the product fixture to move the product to be tested directly below the front-facing relay lens. A fixed-focus mounting bracket is provided on the cabinet, and the front-facing fixed-focus light source is adjustablely limited to the fixed-focus mounting bracket. The front camera of the tablet computer on the product fixture can capture images of the front-facing fixed-focus light source through the front-facing relay lens.

[0011] As a further improvement of the present invention, the main camera black card testing mechanism includes a main camera black card cylinder, the main camera black card cylinder is connected to the cabinet, the main camera black card cylinder is provided with a main camera test black card at its output end, and the main camera black card cylinder can drive the main camera test black card to move to directly below the product fixture on the rotary feeding mechanism; The main camera close-focus testing mechanism includes a close-focus testing frame connected to the cabinet. The close-focus testing frame is equipped with an adjustable lifting platform, and a close-focus light source is provided on the adjustable lifting platform. The rotary feeding mechanism can drive the product clamp to move the product to be tested directly above the close-focus light source.

[0012] As a further improvement of the present invention, the main camera telephoto testing mechanism includes a rotating cylinder and a telephoto mounting frame, which are respectively connected to the cabinet. A telephoto relay lens is provided on the output end of the rotating cylinder. The rotating cylinder can drive the telephoto relay lens to move directly below the tablet computer on the product fixture. A telephoto light source is provided on the telephoto mounting frame. The telephoto light source is adjustablely limited to the telephoto mounting frame. The rear camera of the tablet computer on the product fixture can capture the telephoto light source through the telephoto relay lens. The main camera white card testing mechanism includes a main camera white card light source, which is connected to the output end of the rotating cylinder. The rotating cylinder can drive the main camera white card light source to move directly below the tablet computer on the product fixture.

[0013] As a further improvement of the present invention, the front-facing white card testing mechanism includes a front-facing white card light source, the front-facing white card light source is connected to the cabinet, and the rotary feeding mechanism can drive the product fixture to move the product to be tested directly below the front-facing white card light source.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention, by setting up a rotating feeding mechanism and sequentially integrating an initial test position, a first test position, a second test position, and a third test position along its movement direction, enables a tablet computer to automatically and continuously complete multiple function tests, including those for the camera, flash, and screen, after a single clamping. This avoids the drawbacks of multiple clamping tests, improving testing efficiency and overall production cycle time. Furthermore, by directly connecting the front-facing camera testing mechanism to the output end of the sealing mechanism used to close the feeding port, precise alignment for the front-facing camera testing is achieved simultaneously with the closure of the feeding port. This integrated design not only saves on independent drive mechanisms and simplifies the equipment structure but also ensures the consistency of the optical testing environment, improving the reliability of test results. Attached Figure Description

[0015] To more clearly illustrate the solutions in this invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the external structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure from another perspective of an embodiment of the present invention; Figure 4 This is a schematic diagram of the rotary feeding mechanism in an embodiment of the present invention; Figure 5 This is a schematic diagram of the sealing mechanism and the front-facing black card testing mechanism in an embodiment of the present invention; Figure 6 This is a schematic diagram of the screen testing mechanism and the flash testing mechanism in an embodiment of the present invention. Figure 7 This is a schematic diagram of the front-facing fixed-focus testing mechanism and the main-facing black card testing mechanism in an embodiment of the present invention. Figure 8 This is a schematic diagram of the main camera close-up testing mechanism in an embodiment of the present invention. Figure 9 This is a schematic diagram of the main camera telephoto testing mechanism and the main camera white card testing mechanism in an embodiment of the present invention. Detailed Implementation

[0017] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order.

[0018] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] like Figures 1-9 As shown, a tablet computer screen and camera testing device is used to perform fully automatic, one-stop comprehensive testing of multiple performance aspects of a tablet computer, including screen display effect, front camera, rear main camera, and flash.

[0021] The tablet computer screen and camera testing equipment includes a cabinet 100, which serves as the basic support structure for the entire equipment. The cabinet is hollow inside to accommodate other functional components. Multiple openable access doors 200 are installed on the side walls of the cabinet 100, facilitating maintenance, calibration, and troubleshooting of the internal mechanisms. A loading port 101 is located on the front of the cabinet 100, serving as the passageway for the tablet computer to be tested to enter and exit the equipment. A sealing mechanism 300 is positioned on the cabinet 100 corresponding to the loading port 101. The core function of this sealing mechanism is to open or close the loading port 101. When the loading port 101 is open, it allows operators or automated robotic arms to load and unload the tablet computer; when the loading port 101 is closed, it isolates the interior of the cabinet 100 from the external environment, creating a darkroom environment free from external light interference for subsequent optical testing, ensuring the accuracy and consistency of camera testing.

[0022] Inside the cabinet 100, a rotary feeding mechanism 400 is installed. This rotary feeding mechanism 400 is the core driving force of the entire automated process. A product fixture 500 is installed on the output end of the rotary feeding mechanism 400 to hold the tablet computer to be tested. Inside the cabinet 100, along the circumferential direction of the rotary feeding mechanism 400, four sets of test stations are sequentially set: the initial test station, the first test station, the second test station, and the third test station. The rotary feeding mechanism 400 can precisely drive the product fixture 500, causing it to carry the tablet computer and sequentially stop and position it at the designated test location of each of the above test stations in a predetermined order, thereby realizing a pipeline-style parallel testing.

[0023] The initial test position is located precisely at the corresponding position of the discharge port 101. A front-facing black card testing mechanism 1 is integrated into the initial test position. This front-facing black card testing mechanism 1 is mechanically connected to the output end of the sealing mechanism 300. When the sealing mechanism 300 actuates to close the discharge port 101, it simultaneously moves the front-facing black card testing mechanism 1, ensuring it precisely covers the front-facing camera of the tablet computer on the product fixture 500, achieving accurate alignment. Thus, at the very first moment of testing, the front-facing camera can capture an image of the black card in the enclosed dark chamber, thereby checking for abnormalities such as dead spots or bright spots in the camera. This linked design cleverly utilizes a single drive source to complete two actions, resulting in a compact structure and ensuring that the positional relationship between the front-facing black card testing mechanism 1 and the camera is precise and consistent during each test.

[0024] During actual testing, after the initial test station completes the black card test for the front camera, the rotating feeding mechanism 400 transports the product to the first test station. The first test station includes both a screen testing mechanism 2 and a flash testing mechanism 3. The screen testing mechanism 2 captures and analyzes specific images or colors displayed on the tablet screen after it is turned on to detect issues such as dead pixels, color differences, and uneven brightness. The flash testing mechanism 3 tests the flash next to the tablet's rear camera. It simulates a specific reflection or lighting environment, activating the flash, and then uses the rear main camera to capture a gray card image under that environment, analyzing whether the light uniformity and brightness meet the standards.

[0025] Next, the rotating feeding mechanism 400 transports the product to the second testing station. This second testing station integrates the main camera black card testing mechanism 4, the main camera close-up testing mechanism 5, and the front camera fixed-focus testing mechanism 6. The main camera black card testing mechanism 4 is positioned in front of the rear main camera to test noise and dead pixels in low-light conditions. The main camera close-up testing mechanism 5 provides a test chart at a specific distance to test the resolution and sharpness of the rear main camera when focusing at close range, typically quantified by calculating the MTF50 value. The front camera fixed-focus testing mechanism 6 tests the fixed-focus performance and resolution of the tablet's front camera.

[0026] Finally, the rotary feeding mechanism 400 transports the product to the third testing station. This third testing station integrates the main camera telephoto testing mechanism 7, the main camera white card testing mechanism 8, and the front camera white card testing mechanism 9. The main camera telephoto testing mechanism 7 simulates a long-distance shooting environment using a relay lens to test the rear camera's long-distance focusing and resolution capabilities. The main camera white card testing mechanism 8 provides a uniform white light source for the rear main camera to capture images, used to detect dirt, scratches, and color fringes on the lens or sensor. The front camera white card testing mechanism 9 provides a uniform white light source to the front camera to perform similar dirt and dead pixel detection.

[0027] Through the orderly connection of the four workstations driven by the aforementioned rotary feeding mechanism 400, all preset test items are automatically completed within a closed-loop process, achieving efficient and comprehensive integrated testing.

[0028] like Figure 4 As shown, the rotary feeding mechanism 400 includes a hollow rotary table 401 and a rotary drive motor 402. The hollow rotary table 401 is fixedly connected to the cabinet 100. The rotary drive motor 402 is mounted on the hollow rotary table 401, and its output end is connected to the input end of the hollow rotary table 401, transmitting power to the hollow rotary table 401. A rotary mounting base 403 is mounted on the output end of the hollow rotary table 401. The product fixture 500 is mounted on this rotary mounting base 403. The hollow rotary table 401 provides high rotational accuracy and rigidity, and its hollow structure facilitates wiring and air pipes, resulting in a neater structure. Preferably, there are four product fixtures 500, which are evenly distributed along the circumference on the rotary mounting base 403, i.e., each product fixture 500 is spaced 90 degrees apart. This four-station design can perfectly correspond to the initial, first, second, and third test stations, enabling multiple products to be tested simultaneously at different stations, greatly improving the overall throughput of the equipment.

[0029] In this embodiment, the product fixture 500 includes a fixture fixing plate 501, which is fixedly connected to the rotary mounting base 403. Multiple limiting strips 502 are provided on the fixture fixing plate 501, forming a product limiting groove 503 that matches the outline of the tablet computer. During testing, the tablet computer is directly placed into the product limiting groove 503, where it is fixed and limited by the limiting strips 502. This form-fit fixing method is simple and reliable, eliminates the need for complex clamping cylinders, is low-cost, and effectively reduces product displacement or shaking caused by rotation or vibration during testing, ensuring the repeatability of the position for each photograph and test.

[0030] like Figure 5 As shown, the sealing mechanism 300 includes a sealing cylinder 301, which is fixedly installed on the inner wall of the cabinet 100. The output end of the sealing cylinder 301 is connected to a sealing door 302. When the sealing cylinder 301 extends or retracts, it can drive the sealing door 302 to slide laterally in the horizontal direction, thereby closing or opening the discharge port 101.

[0031] To ensure smooth and precise sliding of the sealing door 302, two door opening guide rails 303 are installed on the cabinet 100, and the sealing door 302 is slidably connected to these two door opening guide rails 303 respectively. The two door opening guide rails 303 precisely limit and guide the movement of the sealing door 302 to prevent it from jamming or deviating.

[0032] The front-facing camera testing mechanism 1 includes a front-facing camera mounting bracket 11, which is fixedly connected to a sealing door 302. A front-facing camera test black card 12 is mounted on the mounting bracket 11. Initially, the sealing door 302 is open, the discharge port 101 is open, and a product clamp 500 on the rotary feeding mechanism 400 is positioned precisely at the discharge port 101. An operator or robotic arm places the tablet computer to be tested into the product clamp 500 and establishes a communication connection between the tablet computer and the equipment's control center. Then, the equipment controls the sealing cylinder 301 to operate, driving the sealing door 302 to slide laterally and close the discharge port 101. In the final closed position of the sealing door 302, the front-facing camera mounting bracket 11 precisely positions the front-facing camera test black card 12 directly above the front-facing camera of the tablet computer on the product clamp 500. At this point, the control center instructs the tablet computer's front-facing camera to capture an image of the front-facing camera test black card 12 and transmits the image data back to the control center. The algorithm inside the control center analyzes the image and determines whether the front-facing camera black card test is qualified by detecting whether there are bright spots or pixel anomalies in the image.

[0033] like Figure 6 As shown, the screen testing mechanism 2 includes a first camera mount 21 and a second camera mount 22 fixed on the cabinet 100. A camera adjustment mechanism is installed on the first camera mount 21, and the output of the camera adjustment mechanism is connected to the first camera 23. The camera adjustment mechanism is mainly used to adjust the installation height of the first camera 23 on the first camera mount 21. The first camera 23 maintains a sliding connection with the first camera mount 21, thus allowing it to move up and down. A second camera 24 is directly mounted on the second camera mount 22. The first camera 23 is located directly above the product fixture 500 and is used to photograph the tablet computer screen vertically downwards. The second camera 24 is positioned at a 45-degree shooting angle above and to the side of the product, used to photograph the tablet computer screen from a side angle. During testing, when the rotating feeding mechanism 400 drives the product fixture 500 to move the tablet computer to the testing position of the screen testing mechanism 2, the tablet computer is controlled to light up its screen to display a special pattern or video. Then, the first camera 23 and the second camera 24 are controlled to take pictures of the tablet computer screen and send the images to the control center. The control center can then analyze the images using algorithms to determine whether the current tablet computer screen display is qualified, thus completing the screen testing process for the tablet computer.

[0034] Specifically, the camera adjustment mechanism includes an adjustment screw 25 and an adjustment handwheel 26. The adjustment screw 25 is rotatably connected to the first camera frame 21, and the adjustment handwheel 26 is connected to the end of the adjustment screw 25. A camera mounting base 27 is fitted onto the adjustment screw 25, and the first camera 23 is connected to the camera mounting base 27. The camera mounting base 27 is slidably connected to the first camera frame 21. When adjustment is needed, the operator rotates the adjustment handwheel 26, causing the adjustment screw 25 to rotate. The camera mounting base 27 on the adjustment screw 25 then moves up and down along the first camera frame 21, thereby precisely adjusting the focus distance of the first camera 23 to adapt to the brightness of different tablet computer screens or the requirements of test charts. By using the first camera 23 and the second camera 24 to capture images of solid colors or specific patterns displayed on the screen from different angles, the screen's color uniformity, viewing angle, white balance, and dead pixels can be detected more comprehensively.

[0035] To improve the accuracy of the test, a supplementary light 28 is also installed on the first camera holder 21. When the screen test is performed, the supplementary light 28 can be controlled to turn on so that it shines light on the tablet computer on the product fixture 500, so that the first camera 23 and the second camera 24 can capture clear product images and ensure the accuracy of the test results.

[0036] like Figure 6 As shown, the flash testing mechanism 3 includes a flash mounting bracket 31 and a gray card mounting bracket 32. The flash mounting bracket 31 is fixed to the cabinet 100 and has a rotatable flash adjustment handwheel 33. The gray card mounting bracket 32 ​​has a flash adjustment screw 34, which is threadedly connected to the flash adjustment handwheel 33, and the gray card mounting bracket 32 ​​is slidably connected to the flash mounting bracket 31. A test gray card 35 is fixed on the gray card mounting bracket 32, and the test gray card 35 is located directly below the product fixture 500 on the rotary feeding mechanism 400. During operation, the rotary feeding mechanism 400 brings the tablet computer directly above the test gray card 35, controls the flash of the tablet computer to light up, and the light shines on the test gray card 35 below and reflects back. The rear main camera of the tablet computer captures this reflected image and sends it to the control center. The algorithm analyzes the uniformity and brightness of the illumination in the image to determine whether the flash performance is qualified.

[0037] Before testing, by rotating the adjustment handwheel 26, the gray card mounting bracket 32 ​​can be driven to rise and fall on the flash mounting bracket 31, thereby changing the distance between the test gray card 35 and the product's rear camera and flash, in order to adapt to different optical parameters or meet the testing needs of different types of products.

[0038] like Figure 7As shown, the front-facing camera fixed-focus testing mechanism 6 includes a front-facing camera repeater lens 61 and a front-facing camera fixed-focus light source 62. A front-facing camera mounting bracket 63 is fixed on the cabinet 100, and the front-facing camera repeater lens 61 is mounted on the front-facing camera mounting bracket 63. During operation, the rotating feeding mechanism 400 drives the product fixture 500 to rotate, so that the front-facing camera of the tablet computer on the product fixture 500 is precisely aligned directly below the front-facing camera repeater lens 61. At the same time, a fixed-focus mounting bracket 64 is also provided on the cabinet 100, and the front-facing camera fixed-focus light source 62 is adjustablely connected to the fixed-focus mounting bracket 64. During testing, the rotary feeding mechanism 400 drives the product fixture 500 to move the tablet computer directly below the front-facing camera repeater 61. The tablet computer's front-facing camera then takes a picture through the repeater, capturing an image of the front-facing fixed-focus light source 62. The tablet computer captures a specific fixed-focus image on the light source 62. The control center's algorithm analyzes the sharpness of the designated area in the image and calculates the MTF50 value to quantitatively evaluate the front-facing camera's focus accuracy and resolution. The front-facing camera repeater 61 simulates a longer optical path, enabling the front-facing camera to effectively capture a long-distance fixed-focus image within the limited space of the cabinet 100.

[0039] Before actual testing, the distance between the front fixed-focus light source 62 and the front repeater lens 61 can be changed by adjusting the mounting position of the front fixed-focus light source 62 on the fixed-focus mounting bracket 64, making it suitable for the testing needs of different products. The specific adjustment structure is similar to the adjustment method of the gray card mounting bracket 32, and will not be described in detail here.

[0040] like Figure 7 As shown, the main camera black card testing mechanism 4 includes a main camera black card cylinder 41, which is fixed on the cabinet 100. A main camera test black card 42 is installed at the output end of the main camera black card cylinder 41. The main camera black card cylinder 41 can drive the main camera test black card 42 to move precisely to the position directly below the product fixture 500 on the rotary feeding mechanism 400, thus completely covering the rear main camera. At this time, the control center instructs the rear camera of the tablet computer to take an image of the main camera test black card 42 and transmit the image data back to the control center. The algorithm inside the control center analyzes the image and determines whether the main camera black card test is qualified by detecting whether there are bright spots or pixel abnormalities in the image.

[0041] like Figure 8As shown, the main camera close-focus testing mechanism 5 includes a close-focus testing frame 51, which is fixed on the cabinet 100. An adjustable lifting platform 52 is mounted on the close-focus testing frame 51, and a close-focus light source 53 is mounted on the adjustable lifting platform 52. The rotary feeding mechanism 400 can drive the product fixture 500 to move directly above the close-focus light source 53. During testing, the main camera captures a specific image on the close-focus light source 53, and the MTF50 value is calculated using an algorithm to determine whether the resolution and sharpness of the rear main camera are up to standard when focusing at close range.

[0042] The adjustable lifting platform 52 can flexibly adjust the distance between the near-focus light source 53 and the camera according to different testing standards or product models, enhancing the versatility of the equipment. The specific adjustment structure is similar to that of the gray card mounting bracket 32, and will not be described in detail here.

[0043] like Figure 9 As shown, the main camera telephoto testing mechanism 7 includes a rotating cylinder 71 and a telephoto mounting bracket 72. Both the rotating cylinder 71 and the telephoto mounting bracket 72 are fixedly mounted on the cabinet 100. A telephoto repeater lens 73 is mounted on the output end of the rotating cylinder 71, which can drive the telephoto repeater lens 73 to move directly below the rear camera of the tablet computer on the product fixture 500. A telephoto light source 74 is mounted on the telephoto mounting bracket 72, and the telephoto light source 74 is adjustablely limited and connected to the telephoto mounting bracket 72.

[0044] After the rotary feeding mechanism 400 transports the tablet computer on the product fixture 500 to the third test position, the equipment control center sends a command to the rotating cylinder 71. The rotating cylinder 71 drives the telephoto repeater lens 73 to move horizontally, precisely positioning it directly below the rear camera of the tablet computer on the product fixture 500, ensuring the optical path is aligned; simultaneously, it controls the telephoto light source 74 to illuminate. The tablet computer's rear camera takes a picture, and the captured image is the image of the card on the telephoto light source 74 after being magnified or having its optical path extended by the telephoto repeater lens 73. After the picture is taken, the tablet computer sends the image data back to the equipment control center. The image processing algorithm inside the control center decodes and analyzes the image to test the telephoto performance of the tablet computer's rear camera. After the test is completed, the rotating cylinder 71 retracts, moving the telephoto repeater lens 73 away to make room for subsequent main camera white card testing or other mechanisms.

[0045] The fundamental purpose of the main camera telephoto test is to simulate the imaging clarity and resolution of a tablet's rear camera at a relatively long distance (such as several meters to infinity) within a limited-size equipment cabinet 100. The telephoto relay lens 73 is essentially a positive optical system composed of one or more lenses. Its function is to optically transform the telephoto light source 74, which is placed at a relatively close distance, and the test image card to form a virtual image located at a great distance in front of the camera. In other words, the tablet's rear camera does not actually capture the physical image card that is physically close to it, but rather the virtual image of the image card that "appears to be far away" after being transformed by the relay lens.

[0046] The main camera white card testing mechanism 8 includes a main camera white card light source 81, which is directly connected to the output of the switching cylinder 71. When testing the white card, the switching cylinder 71 moves the telephoto relay lens 73 away and simultaneously pushes the main camera white card light source 81 directly below the camera. This ingenious design achieves switching between two different testing modules through a single cylinder, saving space and cost. The tablet's rear camera captures a uniform white light image provided by the white card light source, and the control center evaluates the main camera's image quality by analyzing dead pixels, bad lines, dirt, and color aberrations.

[0047] like Figure 3 As shown, the front-facing white card testing mechanism 9 includes a front-facing white card light source 91, which is fixed to the cabinet 100. When the rotary feeding mechanism 400 drives the product fixture 500 to move to the third testing position, the tablet computer on the product fixture 500 is positioned directly below the front-facing white card light source 91. The tablet computer's front-facing camera directly captures the image on the front-facing white card light source 91, which is also used to detect defects such as dirt, dead pixels, and color uniformity in the front-facing camera.

[0048] Working principle: After the equipment is started, the sealing cylinder 301 drives the sealing door 302 to slide along the opening guide rail 303, opening the discharge port 101. The rotary drive motor 402 drives the rotary mounting base 403 to rotate via the hollow rotary table 401, so that one of the product fixtures 500 is precisely positioned at the initial test position at the discharge port 101. The tablet computer is placed into the product fixture 500 manually or by a robotic arm, and a communication connection is established. Subsequently, the sealing cylinder 301 drives the sealing door 302 in reverse to close the discharge port 101, while the front-facing test black card 12, fixed on the sealing door 302, is precisely moved to directly above the front-facing camera of the tablet computer. The control center instructs the front-facing camera to capture an image of the black card, completing the front-facing black card test.

[0049] Next, the rotary drive motor 402 drives the hollow rotary table 401 to rotate 90 degrees, sending the product into the first test position. The tablet computer screen is lit up or a special pattern is displayed, and the first camera 23 is controlled to capture a picture of the screen from directly above; simultaneously, the second camera 24 is controlled to capture a picture of the screen from a 45-degree angle. The images are transmitted back to the control center for analysis of dead pixels, color differences, etc. Subsequently, the flash on the back of the tablet computer is activated, illuminating the test gray card 35 located below the product. The tablet computer's rear main camera then captures an image of the gray card to evaluate the flash performance.

[0050] After completing all tests at the first test position, the hollow rotary table 401 is rotated 90 degrees by the rotary feeding motor to send the product to the second test position. The main camera black card cylinder 41 extends, driving the main camera test black card 42 to cover the rear main camera, capturing an image of the black card to detect bad pixels, completing the main camera black card test. Next, the main camera black card cylinder 41 retracts, and the rear main camera captures an image of the near-focus light source 53. The control center calculates the MTF50 value to evaluate the near-focus resolution, completing the main camera near-focus test. Then, the front camera captures an image of the card on the front camera fixed-focus light source 62 through the front camera repeater lens 61, and the MTF50 value is calculated to complete the front camera fixed-focus test.

[0051] After completing all tests at the second test position, the hollow rotary table 401 is rotated 90 degrees by the rotary feeding motor to send the product to the third test position. The rotating cylinder 71 extends, driving the telephoto repeater 73 to move below the rear main camera. The telephoto light source 74 illuminates, and the rear main camera of the tablet computer on the product fixture 500 captures the image card on the telephoto light source 74 through the telephoto repeater 73, completing the main camera telephoto test. Subsequently, the rotating cylinder 71 retracts, simultaneously pushing the main camera white card light source 81 directly below the rear main camera. The rear main camera captures the white card image, analyzing for dead pixels, dirt, and color difference clusters, completing the main camera white card test. When the product is sent to the third test position, the tablet computer on the product fixture 500 is positioned directly below the white card light source. The tablet computer's front camera captures the white card image, completing the detection of dirt and dead pixels, thus completing the front camera white card test.

[0052] After all tests are completed, the rotary feeding mechanism 400 returns the products to the initial test position. The sealing cylinder 301 opens the sealing door 302, and the operator removes the tablet computer and sorts it according to the test results. The four product fixtures 500 rotate cyclically between the four stations, enabling parallel testing of multiple products.

[0053] The specific embodiments described above are preferred embodiments of the present invention and are not intended to limit the specific scope of the present invention. The scope of the present invention includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A tablet computer screen and camera testing device, characterized in that: The device includes a cabinet, which has multiple openable and closable maintenance doors on its side walls. The cabinet also has a material discharge port, and a sealing mechanism is provided at a position corresponding to the material discharge port. The sealing mechanism is used to open or close the material discharge port. The cabinet is equipped with a rotary feeding mechanism, and the output end of the rotary feeding mechanism is equipped with a product clamp. The cabinet is provided with an initial test position, a first test position, a second test position and a third test position in sequence along the movement direction of the rotary feeding mechanism. The rotary feeding mechanism can drive the product clamp to move the product to be tested to the test position of the first test position, the second test position and the third test position in sequence. The initial test position is directly opposite the material discharge port. The initial test position includes a front-facing black card test mechanism. The front-facing black card test mechanism is connected to the output end of the sealing mechanism. The sealing mechanism can drive the front-facing black card test mechanism to align with the product on the product fixture. The first test position includes a screen test mechanism and a flash test mechanism; the second test position includes a main camera black card test mechanism, a main camera close-focus test mechanism, and a front camera fixed-focus test mechanism; and the third test position includes a main camera telephoto test mechanism, a main camera white card test mechanism, and a front camera white card test mechanism.

2. The tablet computer screen and camera testing device according to claim 1, characterized in that: The rotary feeding mechanism includes a hollow rotary table and a rotary drive motor. The hollow rotary table is connected to the cabinet. The output end of the rotary drive motor is connected to the input end of the hollow rotary table. A rotary mounting base is provided on the output end of the hollow rotary table. The product fixture is connected to the rotary mounting base. The product clamps are four in number, and the four product clamps are distributed at equal intervals along the circumference on the rotary mounting base; The product fixture includes a fixture fixing plate, and the fixture fixing plate is provided with multiple limiting strips, which together form a product limiting groove.

3. The tablet computer screen and camera testing device according to claim 1, characterized in that: The sealing mechanism includes a sealing cylinder, and a sealing door is provided on the output end of the sealing cylinder. The sealing cylinder can drive the sealing door to slide laterally, so that the sealing door is closed or the discharge port is opened.

4. The tablet computer screen and camera testing device according to claim 3, characterized in that: The front camera black card testing mechanism includes a front camera black card mounting bracket, which is connected to the sealing door, and a front camera test black card is provided on the front camera black card mounting bracket.

5. The tablet computer screen and camera testing device according to claim 1, characterized in that: The screen testing mechanism includes a first camera frame and a second camera frame connected to the cabinet. The first camera frame is equipped with a camera adjustment mechanism, and a first camera is provided at the output end of the camera adjustment mechanism. The adjustment mechanism is used to adjust the installation height of the first camera on the first camera frame. The first camera is slidably connected to the first camera frame. The second camera frame is equipped with a second camera. The first camera is located directly above the product fixture on the rotary feeding mechanism, and the second camera is set at a 45° shooting angle to the side and above the product fixture on the rotary feeding mechanism.

6. The tablet computer screen and camera testing device according to claim 5, characterized in that: The flash testing mechanism includes a flash mounting bracket and a gray card mounting bracket. The flash mounting bracket is connected to the cabinet and has a rotatable flash adjustment handwheel. The gray card mounting bracket has a flash adjustment screw, which is threadedly connected to the flash adjustment handwheel. The gray card mounting bracket is slidably connected to the flash mounting bracket and has a test gray card on it. The test gray card is located directly below the product fixture on the rotary feeding mechanism.

7. The tablet computer screen and camera testing device according to claim 1, characterized in that: The front-facing fixed-focus testing mechanism includes a front-facing relay lens and a front-facing fixed-focus light source. A front-facing mounting bracket is provided on the cabinet, and the front-facing relay lens is connected to the front-facing mounting bracket. The rotary feeding mechanism can drive the product fixture to move the product to be tested directly below the front-facing relay lens. A fixed-focus mounting bracket is provided on the cabinet, and the front-facing fixed-focus light source is connected to the fixed-focus mounting bracket with adjustable limit. The front camera of the tablet computer on the product fixture can capture images of the front-facing fixed-focus light source through the front-facing relay lens.

8. The tablet computer screen and camera testing device according to claim 7, characterized in that: The main camera black card testing mechanism includes a main camera black card cylinder, which is connected to the cabinet. The main camera black card cylinder has a main camera test black card on its output end. The main camera black card cylinder can drive the main camera test black card to move directly below the product fixture on the rotary feeding mechanism. The main camera close-focus testing mechanism includes a close-focus testing frame connected to the cabinet. The close-focus testing frame is equipped with an adjustable lifting platform, and a close-focus light source is provided on the adjustable lifting platform. The rotary feeding mechanism can drive the product clamp to move the product to be tested directly above the close-focus light source.

9. The tablet computer screen and camera testing device according to claim 1, characterized in that: The main camera telephoto testing mechanism includes a rotating cylinder and a telephoto mounting frame, which are respectively connected to the cabinet. A telephoto relay lens is provided on the output end of the rotating cylinder. The rotating cylinder can drive the telephoto relay lens to move directly below the tablet computer on the product fixture. A telephoto light source is provided on the telephoto mounting frame. The telephoto light source is adjustablely limited to the telephoto mounting frame. The rear camera of the tablet computer on the product fixture can capture the telephoto light source through the telephoto relay lens. The main camera white card testing mechanism includes a main camera white card light source, which is connected to the output end of the rotating cylinder. The rotating cylinder can drive the main camera white card light source to move directly below the tablet computer on the product fixture.

10. The tablet computer screen and camera testing device according to claim 1, characterized in that: The front-facing white card testing mechanism includes a front-facing white card light source, which is connected to the cabinet. The rotary feeding mechanism can drive the product fixture to move the product to be tested directly below the front-facing white card light source.

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