A multi-station testing device

Abstract

This utility model relates to a multi-station testing device, comprising: a frame; a drive mechanism, which includes: a support, a drive component, a turntable, and fixture assemblies. The support is disposed within the frame, the turntable is rotatably connected to the support, the output end of the drive component is connected to the turntable, and multiple sets of fixture assemblies are arranged around the turntable, each set of fixture assemblies holding a screen to be tested; and a testing mechanism, comprising: a barcode scanning component, a darkroom detection component, and a colorimetry detection component respectively disposed around the turntable. The barcode scanning component is used to identify the identification code of the screen to be tested, the darkroom detection component is used to detect the display integrity of the screen to be tested, and the colorimetry detection component is used to detect the color accuracy of the screen to be tested. This utility model, through the coordinated operation of the barcode scanning component, the darkroom detection component, and the colorimetry detection component, performs all three operations simultaneously, greatly improving the screen testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of screen inspection technology, and in particular to a multi-station inspection device. Background Technology

[0002] Driven by industries such as smart terminals, automotive displays, and smart homes, the global display screen market continues to grow. As a core component of human-computer interaction, the quality of the screen directly affects the user experience and brand reputation of end products. Its display integrity, such as dead pixels and light leakage, determines the basic usability of the screen, while color accuracy determines the visual realism of the image. Therefore, screen testing has become an indispensable and crucial link in the display industry chain.

[0003] However, existing screen inspection equipment still has the following problems, which seriously restrict production efficiency and quality control: the single-station layout is inefficient and cannot meet the needs of mass production. Traditional screen inspection equipment mostly adopts a single-station serial process. In large-scale mass production lines, multiple single-station equipment needs to be configured, which not only occupies a lot of factory space, but also increases the difficulty of equipment procurement and maintenance. That is, one or more equipment work together to complete the loading, scanning, inspection and unloading in sequence, resulting in a long inspection cycle for a single screen. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem of low efficiency of single-station layout in the existing screen detection equipment, thereby providing a multi-station detection equipment.

[0005] To solve the above-mentioned technical problems, this utility model provides a multi-station testing device, which includes:

[0006] frame;

[0007] The driving mechanism includes: a bracket, a driving component, a turntable, and a fixture assembly. The bracket is disposed inside the frame, the turntable is rotatably connected to the bracket, the output end of the driving component is connected to the turntable, and multiple sets of fixture assemblies are disposed around the turntable, with each set of fixture assemblies holding a screen to be tested.

[0008] The testing mechanism includes: a barcode scanning component, a darkroom testing component, and a colorimetry testing component respectively disposed around the turntable. The barcode scanning component is used to identify the identification code of the screen under test, the darkroom testing component is used to detect the display integrity of the screen under test, and the colorimetry testing component is used to detect the color accuracy of the screen under test.

[0009] In one embodiment of this utility model, the barcode scanning assembly includes: a base plate, a sliding pair, a support rod, a locking member, and a barcode scanner. The base plate is disposed on a frame, the support rod is movably connected to the base plate via the sliding pair, the barcode scanner is movably connected to the support rod, and the support rod and the base plate are respectively provided with locking members, which are used to lock or unlock the support rod and the barcode scanner.

[0010] In one embodiment of this utility model, a placement station, a darkroom detection station, a colorimetry detection station, and a barcode scanning station are respectively formed around the turntable, and each of the placement station, darkroom detection station, colorimetry detection station, and barcode scanning station is equipped with a fixture assembly.

[0011] In one embodiment of the present invention, the darkroom detection assembly includes a detection box and a detection camera. The detection box is disposed on one side of the screen to be tested, and the detection camera is disposed inside the detection box. A detection hole is provided on the side of the detection box near the screen to be tested.

[0012] In one embodiment of the present invention, the colorimetric detection component includes: a colorimetric frame, a three-axis drive assembly, and a colorimeter. The colorimetric frame is mounted on a frame, the three-axis drive assembly is mounted on the colorimetric frame, and the colorimeter is connected to the output end of the three-axis drive assembly.

[0013] In one embodiment of the present invention, the three-axis drive assembly includes: a first drive assembly, a second drive assembly, and a third drive assembly. The first drive assembly is disposed on a colorimeter frame. The second drive assembly is connected to the output end of the first drive assembly to move along the width direction of the screen to be tested. The third drive assembly is connected to the output end of the second drive assembly to move along the length direction of the screen to be tested. The colorimeter is connected to the output end of the third drive assembly to move along the height direction of the screen to be tested.

[0014] In one embodiment of this utility model, the frame is provided with a closed plate, and a detection space is enclosed inside the frame. The frame has a placement opening near the placement station and the scanning station.

[0015] In one embodiment of this utility model, detection gratings are provided on the frame bodies on both sides of the placement port.

[0016] In one embodiment of this utility model, the frame is provided with a fan filter unit, the input end of the fan filter unit is connected to the outside, and the output end of the fan filter unit passes through the enclosure plate of the frame and is connected to the detection space.

[0017] In one embodiment of this utility model, the frame is provided with a control system and a display screen, and the control system is electrically connected to the display screen, the drive mechanism and the detection mechanism.

[0018] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0019] The multi-station inspection device described in this utility model, through the coordinated operation of a barcode scanning component, a darkroom inspection component, and a colorimetry inspection component, allows the three components to work synchronously in parallel. Each component only needs to focus on a single step. When scanning the barcode, darkroom inspection is in progress, and when darkroom inspection is in progress, colorimetry inspection is in progress. This not only ensures inspection efficiency but also ensures quality traceability through identity binding, thereby greatly improving the inspection efficiency of the screen. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of the testing equipment of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the inspection equipment of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the barcode scanning component of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the colorimetric detection component of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the fan filter unit of this utility model.

[0026] Explanation of reference numerals in the accompanying drawings: 1. Frame; 2. Scanning assembly; 21. Base plate; 22. Support rod; 23. Scanner; 24. Locking element; 3. Colorimeter detection assembly; 31. Colorimeter frame; 32. First drive assembly; 33. Second drive assembly; 34. Third drive assembly; 35. Colorimeter; 4. Darkroom detection assembly; 5. Fixture assembly; 6. Display screen; 7. Grating; 8. Control system; 9. Placement port; 10. Screen under test; 11. Sealing plate; 12. Fan filter unit; 13. Bracket; 14. Drive element. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0028] Example

[0029] Reference Figures 1-5As shown, the multi-station testing equipment of this utility model includes:

[0030] frame;

[0031] The driving mechanism includes: a bracket, a driving component, a turntable, and a fixture assembly. The bracket is disposed inside the frame, the turntable is rotatably connected to the bracket, the output end of the driving component is connected to the turntable, and multiple sets of fixture assemblies are disposed around the turntable, with each set of fixture assemblies holding a screen to be tested.

[0032] The testing mechanism includes: a barcode scanning component, a darkroom testing component, and a colorimetry testing component respectively disposed around the turntable. The barcode scanning component is used to identify the identification code of the screen under test, the darkroom testing component is used to detect the display integrity of the screen under test, and the colorimetry testing component is used to detect the color accuracy of the screen under test.

[0033] This utility model discloses a multi-station testing device, which uses a frame as the basic support carrier and a rigid metal frame to provide reliable fixation for the drive mechanism and the testing mechanism. The drive mechanism, as the power core, consists of a support, a drive component, a turntable, and fixture assemblies. The support is a frame structure fixed inside the frame, and the turntable is rotatably connected to the top of the support via bearings to ensure coaxiality and stability during turntable rotation. The drive component is preferably a servo motor, with its output end rigidly connected to the central shaft of the turntable via a coupling, allowing precise control of the turntable's rotation angle and speed, such as achieving 90° indexing. The turntable is disc-shaped, with multiple sets of fixture assemblies evenly distributed around its perimeter to meet the screen fixing requirements.

[0034] The testing facility is arranged around the turntable, integrating a barcode scanning component, a darkroom testing component, and a colorimetry testing component. The barcode scanning component reads the unique identifier of the screen under test, such as a QR code, barcode, or identification code carried by an RFID chip, to link the identity information with subsequent testing data. The darkroom testing component eliminates external interference through a closed, light-free environment, accurately detecting the integrity of the screen display, such as dead pixels, light leakage, and uneven display. The colorimetry testing component performs quantitative measurements on screen color accuracy parameters, such as RGB primary color deviation and color coordinate offset.

[0035] The drive unit receives commands from the control system and drives the turntable to rotate at a preset speed, sequentially conveying the screen to be tested from the fixture assembly to the barcode scanning station, the darkroom inspection station, and the colorimetry inspection station. The barcode scanning component reads the screen's identification code and binds it to the control system. Then, the turntable rotates to the darkroom inspection station, where the screen illuminates a preset test image, such as pure white, pure black, or any single color. The industrial camera in the darkroom inspection assembly captures the image and transmits it to the system for analysis. Finally, the turntable reaches the colorimetry inspection station, where the angle can be adjusted to complete colorimetry measurements at multiple locations.

[0036] The multi-station circumferential layout enables a continuous process of loading, scanning, testing, and unloading, which is many times more efficient than single-station equipment; integrated testing avoids secondary damage caused by manual handling, and the binding of testing data with identity enables full-chain traceability, significantly improving the accuracy and reliability of testing.

[0037] Reference Figures 2-3 As shown, each set of fixture components includes at least three fixtures. The barcode scanning assembly includes: a base plate, a sliding pair, a support rod, a locking element, and a barcode scanner. The base plate is disposed on the frame. The support rod is movably connected to the base plate through the sliding pair. The barcode scanner is movably connected to the support rod. The support rod and the base plate are respectively provided with locking elements. The locking elements are used to lock or unlock the support rod and the barcode scanner. The barcode scanning component can adapt to the barcode positions of screens of different sizes. The base plate is a rectangular metal plate, which is fixed to the side of the frame with bolts. The sliding pair adopts a linear guide rail slider structure. The guide rail is arranged along the length of the base plate, and the slider is rigidly connected to the bottom of the support rod, so as to realize the position adjustment of the support rod in the length direction of the base plate, i.e., the arrangement direction of the three fixtures. The top of the support rod is connected to the barcode scanner through a sleeve, which can realize the sliding adjustment of the barcode scanner from 0-360° angle and the length direction of the support rod. The position of the barcode scanner is adjusted along the axis of the support rod through the sleeve. The locking component consists of two sets of locking devices. One set adjusts and fixes the relative position of the support rod and the base plate, and the other set adjusts the position of the barcode scanner and the support rod. The locking component can be a combination of locking bolts, sleeves, and handles.

[0038] For screens of different sizes, first loosen the support rod locking mechanism, and adjust the position of the support rod along the sliding joint until the barcode scanner is aligned with the identification code area; then loosen the barcode scanner locking mechanism, and fine-tune the angle and axial position by rotating the joint and sliding groove to ensure precise lens alignment; finally, tighten both sets of locking mechanisms to prevent displacement during inspection. For screens of the same specifications in the same batch, the barcode scanning assembly needs repeated adjustments. When the turntable transports the screen to the scanning station, the barcode scanner emits a laser to scan the identification code, and the data is transmitted to the control system in real time, completing the binding of the identification code with subsequent inspection data.

[0039] The multi-dimensional adjustable structure is compatible with screens of different sizes and with different code positions, making it highly versatile; the locking mechanism ensures positional stability during detection, preventing scanning failure due to vibration; the adjustment process does not require component replacement, significantly reducing debugging time and ensuring a high scanning success rate.

[0040] The turntable is surrounded by placement stations, darkroom inspection stations, colorimetry inspection stations, and barcode scanning stations. Each of these stations is equipped with fixture components. The circumferential layout of the turntable directly determines the space utilization and efficiency of the equipment. In this embodiment, the placement stations, barcode scanning stations, darkroom inspection stations, and colorimetry inspection stations are evenly distributed around the turntable, spaced 90° apart. Each station corresponds to a set of fixture components, enabling parallel processing. That is, when the placement station loads materials, the barcode scanning station reads the identification, the darkroom inspection station checks the integrity, and the colorimetry station measures the color accuracy—all four processes are performed simultaneously.

[0041] The operator places the screen into the fixture assembly at the placement station. The turntable rotates 90° to the barcode scanning station to complete the identity binding. It then rotates 90° to the darkroom station to check the display integrity. Next, it rotates 90° to the colorimetry station to measure color accuracy. Finally, it rotates 90° back to the placement station, where the operator removes the screen that has been tested and places a new screen, thus forming a cycle.

[0042] The circular layout makes the equipment structure compact and improves space utilization. The parallel processing mode shortens the single-screen detection cycle and greatly increases production capacity. The independent fixtures at each station ensure the consistency of screen position and avoid positioning deviations during cross-station transfer.

[0043] Reference Figure 2 As shown, the darkroom inspection assembly includes an inspection box and an inspection camera. The inspection box is located on one side of the screen to be tested, and the inspection camera is located inside the inspection box. An inspection hole is provided on the side of the inspection box closest to the screen. The darkroom inspection assembly is used to inspect the integrity of the screen display, such as dead pixels and light leakage, and is used to create a low-light environment. Its structure consists of an inspection box, an inspection hole, and an industrial camera: the inspection box is a closed box made of light-shielding material and is fixed to the corresponding workstation on the rack; the inspection box has an inspection hole on the side closest to the screen; the industrial camera is fixed inside the inspection box by a bracket, with its lens facing the inspection hole.

[0044] When the screen is moved to the darkroom station, the fixture assembly ensures that the screen display area is aligned with the test hole; the control system sends a command to light up the screen and display the test image, testing for dark spots when the screen is completely white and for bright spots or light leakage when the screen is completely black; the specific test method is not within the protection scope of this embodiment and adopts existing technology, so it will not be described in detail.

[0045] Reference Figure 4As shown, the colorimetric detection component includes a colorimetric frame, a three-axis drive assembly, and a colorimeter. The colorimetric frame is mounted on the frame, the three-axis drive assembly is mounted on the colorimetric frame, and the colorimeter is connected to the output of the three-axis drive assembly. The colorimetric detection component is used to quantify screen color accuracy, such as color coordinate deviation and brightness uniformity. Its structure consists of a colorimetric frame, a three-axis drive assembly, and a spectrophotometer. The colorimetric frame is a frame-type metal structure fixed to the frame, providing an installation reference for the three-axis drive. The three-axis drive assembly adopts a linear module structure, enabling the colorimeter to move in the X-axis width, Y-axis length, and Z-axis height directions. The spectrophotometer is fixed to the Z-axis slider and can measure parameters such as color coordinates and brightness. The three-axis drive covers the entire screen area and meets focusing requirements, avoiding color accuracy misjudgments caused by single-point detection. The high precision of the spectrophotometer meets the detection needs of high-end screens.

[0046] The three-axis drive assembly includes a first drive assembly, a second drive assembly, and a third drive assembly. The first drive assembly is mounted on the colorimeter frame. The second drive assembly is connected to the output end of the first drive assembly to move along the width direction of the screen under test. The third drive assembly is connected to the output end of the second drive assembly to move along the length direction of the screen under test. The colorimeter is connected to the output end of the third drive assembly to move along the height direction of the screen under test. The three-axis drive assembly is the core of colorimetric detection, and its transmission accuracy directly affects the color accuracy result. The structure consists of the first drive assembly, the second drive assembly, and the third drive assembly, all of which use a combination of servo motors, ball screws, and linear guides. The output end of the servo motor is connected to the ball screw through a coupling, the end of the screw is fixed by a bearing, and the slider is threadedly connected to the screw through a nut seat.

[0047] Reference Figure 1 As shown, the frame is equipped with a closed plate, which encloses a testing space. A placement opening is provided on the frame near the placement and scanning stations. The closed design of the frame creates a stable testing environment. Electrically sealed plates are installed around the frame and on the top, connected to the frame by bolts to form a closed testing space. The placement opening on the side of the frame near the placement and scanning stations is sized to meet the screen loading and unloading requirements.

[0048] The enclosed space isolates the drive mechanism and testing mechanism from the outside world, preventing dust and debris from entering. For example, dust falling on the screen will be misjudged as a dead pixel, and dust falling on the camera lens will affect the image. In addition, an ion destatic device is also installed in the rack to further reduce dust.

[0049] Detection gratings are installed on the frame on both sides of the placement port. As the interaction area for operators, the placement port needs to be protected against accidental contact during equipment operation. In this embodiment, detection gratings are installed on the frame on both sides of the placement port. Multiple sets of infrared emitting diodes are arranged horizontally at the transmitting end, and corresponding receiving diodes are arranged at the receiving end, forming a dense light barrier. The gratings are connected to the control system via data cables to achieve linkage between blocking, shutdown, and alarm functions.

[0050] When the equipment is running, the transmitter continuously emits infrared light, which is received in real time. If the operator's hand or body blocks the light barrier, the receiver sends an interrupt signal to the control system. The system immediately stops the turntable from rotating and the drive components from moving, and triggers a buzzer alarm. Once the operator leaves, the receiver resumes receiving the light, the system de-alarms, and resumes operation.

[0051] Non-contact detection is more flexible than mechanical safety gates and does not affect loading and unloading efficiency; multiple sets of infrared tubes detect objects as small as a finger, ensuring high protection reliability; and linked shutdown and alarm further reduce the incidence of safety accidents.

[0052] The frame is equipped with a fan filter unit. The input end of the fan filter unit is connected to the outside, and the output end of the fan filter unit passes through the enclosure plate of the frame and connects to the detection space. Cleanliness control is achieved through the fan filter unit: the fan filter unit is fixed to the top of the frame, the input end is connected to the outside, and the output end passes through the enclosure plate to the detection space; it is equipped with a centrifugal fan and a high-efficiency filter.

[0053] After the fan starts, outside air is filtered into clean air and sent into the detection space to create a positive pressure environment. The positive pressure causes the internal air to flow outward through the placement port and the gaps in the sealing plate, preventing unfiltered outside air from entering. The system monitors the filter resistance through a differential pressure sensor. If it exceeds the preset value, an alarm is triggered to prompt the filter to be replaced.

[0054] The frame is equipped with a control system and a display screen. The control system is electrically connected to the display screen, the drive mechanism, and the detection mechanism. The control system and display screen adopt an existing industrial computer and PLC combination architecture: the industrial computer acts as the host computer, processing detection data, storing records, and generating reports; the PLC acts as the slave computer, controlling the movement and detection actions of the drive mechanism and the detection mechanism; the two are connected via data cables to the drive components, detection components (i.e., barcode scanners, cameras and colorimeters), sensors (i.e., position sensors, gratings and differential pressure sensors), and the display screen.

[0055] Operators input parameters such as screen size and detection points via the display screen. The industrial computer analyzes the data and sends it to the PLC. The PLC controls the turntable to rotate, sequentially triggering barcode scanning, darkroom detection, and colorimetric detection. Detection data is transmitted to the industrial computer in real time and stored with associated identification codes. If the result exceeds a threshold (e.g., more than 2 bad pixels), the system triggers an alarm and displays it on the screen. The combination of the industrial computer and PLC balances data processing flexibility with real-time motion control, meeting complex testing needs. Visual monitoring on the display screen allows operators to work without specialized training. Data association and storage enable end-to-end traceability, facilitating quality analysis and problem troubleshooting. The alarm function promptly detects faults, reducing equipment downtime.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A multi-station inspection apparatus, characterized by, include: frame; The driving mechanism includes: a bracket, a driving component, a turntable, and a fixture assembly. The bracket is disposed inside the frame, the turntable is rotatably connected to the bracket, the output end of the driving component is connected to the turntable, and multiple sets of fixture assemblies are disposed around the turntable, with each set of fixture assemblies holding a screen to be tested. The testing mechanism includes: a barcode scanning component, a darkroom testing component, and a colorimetry testing component respectively disposed around the turntable. The barcode scanning component is used to identify the identification code of the screen under test, the darkroom testing component is used to detect the display integrity of the screen under test, and the colorimetry testing component is used to detect the color accuracy of the screen under test.

2. The multi-station inspection apparatus of claim 1, wherein: The barcode scanning assembly includes: a base plate, a sliding pair, a support rod, a locking component, and a barcode scanner. The base plate is disposed on the frame, the support rod is movably connected to the base plate via the sliding pair, the barcode scanner is movably connected to the support rod, and the support rod and the base plate are respectively provided with locking components, which are used to lock or unlock the support rod and the barcode scanner.

3. The multi-station inspection apparatus of claim 1, wherein: The turntable is surrounded by a placement station, a darkroom detection station, a colorimetry detection station, and a barcode scanning station. Each of the placement station, darkroom detection station, colorimetry detection station, and barcode scanning station is equipped with a fixture assembly.

4. The multi-station inspection apparatus of claim 1, wherein: The darkroom testing assembly includes a testing box and a testing camera. The testing box is located on one side of the screen to be tested, and the testing camera is located inside the testing box. A testing hole is provided on the side of the testing box closest to the screen to be tested.

5. The multi-station inspection apparatus of claim 1, wherein: The colorimetric detection component includes: a colorimetric frame, a three-axis drive assembly, and a colorimeter. The colorimetric frame is mounted on the frame, the three-axis drive assembly is mounted on the colorimetric frame, and the colorimeter is connected to the output end of the three-axis drive assembly.

6. A multi-station testing device according to claim 5, characterized in that: The three-axis drive assembly includes a first drive assembly, a second drive assembly, and a third drive assembly. The first drive assembly is disposed on the colorimeter frame. The second drive assembly is connected to the output end of the first drive assembly to move along the width direction of the screen to be tested. The third drive assembly is connected to the output end of the second drive assembly to move along the length direction of the screen to be tested. The colorimeter is connected to the output end of the third drive assembly to move along the height direction of the screen to be tested.

7. The multi-station inspection apparatus of claim 1, wherein: The frame is equipped with a closed plate, and a detection space is enclosed inside the frame. The frame has a placement opening near the placement station and the scanning station.

8. A multi-station inspection apparatus according to claim 7, characterized in that: Detection gratings are installed on the frame on both sides of the placement port.

9. The multi-station inspection apparatus of claim 7, wherein: The frame is equipped with a fan filter unit. The input end of the fan filter unit is connected to the outside, and the output end of the fan filter unit passes through the enclosure plate of the frame and is connected to the detection space.

10. The multi-station inspection apparatus of claim 1, wherein: The frame is equipped with a control system and a display screen, and the control system is electrically connected to the display screen, the drive mechanism, and the detection mechanism.

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