Full-automatic LCD (Liquid Crystal Display) detection blanking method and device and electronic equipment

Abstract

The invention discloses a full-automatic LCD (liquid crystal display) detection blanking method and device and electronic equipment, and belongs to the technical field of LCDs. The full-automatic LCD detection blanking method comprises the steps that a central control system controls a feeding belt assembly to receive an LCD panel, and the LCD panel is temporarily stored in a cache region; the central control system controls the moving mechanism to carry the LCD panel located in the cache region to a detection station of the defect detection platform; the defect detection camera assembly is controlled by the central control system to carry out appearance defect and display performance defect detection on the LCD panel located at the detection station; the moving mechanism is controlled by the central control system to carry the LCD panel from the detection station to the positioning station; the central control system controls the precision detection camera assembly to carry out size precision detection on the LCD panel located at the positioning station; and according to the appearance detection information, the display detection information, the precision detection information and a preset shunting rule, determining whether the detection information is qualified. According to the invention, the technical effects of improving the production efficiency, reducing the occupied space and reducing the cost in the LCD production process are achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of LCD, and particularly relates to a full-automatic LCD detection and unloading method and device and electronic equipment. BACKGROUND

[0002] The LCD (Liquid Crystal Display) is a flat and ultra-thin display device, which is composed of a certain number of color or black and white pixels and is placed in front of a light source or a reflecting surface. In the manufacturing process of the LCD, the detection and unloading links have become the key bottleneck restricting the whole line efficiency, yield and intelligentization. In the prior art, the artificial screening of panel defects is usually adopted, and after the detection is completed, the LCD is transferred to the unloading station by the artificial carrying mode, and is classified and stacked by the artificial mode. However, the detection and unloading are independent processes, and the unloading link is limited by the long transfer path and slow unloading processing speed, which can easily lead to the fact that the whole line capacity cannot be fully released, the production efficiency is reduced, and a large amount of manpower is needed in the mass production of the LCD, and the production cost is high. Meanwhile, the detection and unloading need to be arranged respectively, and a transfer channel or a buffer zone needs to be reserved in the middle, which can also increase the floor area of the production line.

[0003] Therefore, it is necessary to provide a new technical scheme to solve the above technical problems. SUMMARY

[0004] The technical problem to be solved by the present application is the technical problem of low production efficiency, large occupied space and high cost in the production process of the LCD.

[0005] To solve the above technical problems, the application provides a full-automatic LCD detection and blanking method, which comprises the following steps: S1, receiving an LCD panel by a central control system and controlling an incoming belt assembly to temporarily store the LCD panel in a buffer area; S2, transporting the LCD panel in the buffer area to a detection station of a defect detection platform by a central control system and controlling a moving mechanism; S3, detecting the appearance defect and display performance defect of the LCD panel in the detection station by a central control system and controlling a defect detection camera assembly to obtain appearance detection information and display detection information; S4, transporting the LCD panel from the detection station to a positioning station by a central control system and controlling the moving mechanism; S5, detecting the size precision of the LCD panel in the positioning station by a central control system and controlling a precision detection camera assembly to obtain precision detection information; S6, judging whether the LCD panel is qualified according to the appearance detection information, the display detection information and the precision detection information, and a preset shunting rule; S7, if yes, transporting the LCD panel to an empty tray position stack by a central control system and controlling a conveying mechanism; and S8, if no, transporting the LCD panel to an NG belt discharge station by a central control system and controlling the conveying mechanism.

[0006] Optionally, the appearance detection information comprises surface scratch information, foreign matter information and edge collapse defect information of the LCD panel; the display detection information comprises bright spot information, dark spot information and color deviation defect information of the LCD panel; and the precision detection information comprises diagonal line deviation information, edge flatness information and thickness size information of the LCD panel.

[0007] Optionally, the method further comprises the following step before step S2: initially positioning the LCD panel by a visual positioning system, so that the LCD panel is positioned in the detection station.

[0008] Optionally, the preset shunting rule comprises: when the appearance detection information, the display detection information and the precision detection information all meet a preset qualified standard, determining that the LCD panel is qualified; and when any one of the appearance detection information, the display detection information or the precision detection information does not meet the preset qualified standard, determining that the LCD panel is unqualified.

[0009] Optionally, the S2 comprises the following steps: respectively controlling a detection material taking X-axis assembly and a detection conveying Y-axis assembly of the moving mechanism by a central control system, so as to drive the LCD panel to move along the direction of the X-axis or the direction of the Y-axis, and to transport the LCD panel in the buffer area to the detection station of the defect detection platform.

[0010] Optionally, the S7 comprises: controlling the unloading X-axis assembly and the NG belt line assembly of the conveying mechanism respectively by the central control system to drive the unloading suction nozzle mechanism to move along the direction of the X-axis or the direction of the Y-axis, so as to carry the LCD panel to the empty tray position stack.

[0011] Optionally, the full-automatic LCD detection and unloading method further comprises: when it is detected that the stack quantity of the LCD panel on the first empty tray position reaches a preset full load threshold, grabbing a new empty tray from the first empty tray buffer position to the first empty tray position by the first empty tray X-axis assembly; when it is detected that the stack quantity of the LCD panel on the second empty tray position reaches a preset full load threshold, grabbing a new empty tray from the second empty tray buffer position to the second empty tray position by the second empty tray X-axis assembly.

[0012] According to still another aspect of the present application, the present application further provides an automatic LCD detection and unloading device for performing the automatic LCD detection and unloading method, which comprises an input buffer module, a multi-dimension detection module, an unloading module, an empty tray supply mechanism and a central control system. The input buffer module comprises an input belt assembly with a buffer area, which is used to receive the LCD panel and temporarily store the LCD panel in the buffer area. The multi-dimension detection module is used to detect defects of the LCD panel after visual positioning and output defect information, which comprises appearance detection information, display detection information and precision detection information. The unloading module comprises a conveying mechanism, a classification mechanism, at least two empty tray positions arranged on one side of the NG belt, and empty tray buffer positions arranged on the other side of the NG belt and corresponding to the empty tray positions. The empty tray supply mechanism is used to supply empty trays when the qualified products are stacked to full load on any empty tray position. The central control system communicates with the input buffer module, the multi-dimension detection module and the unloading module in real time, and is configured to determine whether the LCD panel is qualified according to the defect information and a preset shunt rule. If yes, the conveying mechanism is driven to carry the LCD panel to the corresponding empty tray position for stacking. If not, the conveying mechanism is driven to carry the LCD panel to the NG belt discharge station.

[0013] Optionally, the multi-dimension detection module comprises an appearance display defect detection sub-module and a size precision detection sub-module, the appearance display defect detection sub-module comprises a sheet feeding detection X-axis assembly, a defect detection platform and a defect detection camera assembly, the sheet feeding detection X-axis assembly is used to carry the LCD panel located in the buffer area to a detection station of the defect detection platform, and the defect detection camera assembly is used to detect surface defects and display performance defects of the LCD panel located in the detection station; the size precision detection sub-module comprises a moving mechanism and a precision detection camera assembly, the moving mechanism is used to carry the LCD panel from the detection station to a positioning station, and the precision detection camera assembly is used to detect the size precision of the LCD panel.

[0014] According to still another aspect of the present application, the present application further provides an electronic device for automatically detecting and discharging LCD, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the program: S1, controlling an incoming belt assembly to receive an LCD panel and temporarily storing the LCD panel in a buffer area through a central control system; S2, carrying the LCD panel located in the buffer area to a detection station of a defect detection platform through a moving mechanism controlled by the central control system; S3, detecting appearance defects and display performance defects of the LCD panel located in the detection station through a defect detection camera assembly controlled by the central control system to obtain appearance detection information and display detection information; S4, carrying the LCD panel from the detection station to a positioning station through the moving mechanism controlled by the central control system; S5, detecting the size precision of the LCD panel located in the positioning station through a precision detection camera assembly controlled by the central control system to obtain precision detection information; S6, judging whether the LCD panel is qualified according to the appearance detection information, the display detection information and the precision detection information and a preset shunting rule; S7, if yes, carrying the LCD panel to a empty tray position for stacking through a carrying mechanism controlled by the central control system; and S8, if no, carrying the LCD panel to an NG belt discharge station through the carrying mechanism controlled by the central control system.

[0015] Advantages:

[0016] The application provides a full-automatic LCD detection and discharging method, which comprises the following steps: receiving an LCD panel by a central control system and controlling an incoming belt assembly to temporarily store the LCD panel in a buffer area; transporting the LCD panel in the buffer area to a detection station of a defect detection platform by a mobile mechanism controlled by the central control system; detecting the appearance defect and display performance defect of the LCD panel in the detection station by a defect detection camera assembly controlled by the central control system to obtain appearance detection information and display detection information; transporting the LCD panel from the detection station to a positioning station by the mobile mechanism controlled by the central control system; detecting the size precision of the LCD panel in the positioning station by a precision detection camera assembly controlled by the central control system to obtain precision detection information; judging whether the LCD panel is qualified according to the appearance detection information, the display detection information and the precision detection information and a preset shunting rule; if yes, transporting the LCD panel to an empty tray position by a conveying mechanism controlled by the central control system; and if no, transporting the LCD panel to an NG belt discharge station by the conveying mechanism controlled by the central control system. In the process of LCD panel detection and discharging, the central control system controls the incoming, transporting, detecting and sorting processes and uniformly schedules each functional unit to eliminate the waiting and connecting time between each process in the traditional production line, realizes the continuous automatic operation of the detection and discharging links, avoids manual intervention and process interruption, forms an integrated operation process of detection and discharging, reduces the equipment space occupation and improves the production rhythm, and centrally processes and shunts the defect detection and precision detection data on the same platform, so that the quality of the LCD panel can be comprehensively evaluated without manual intervention, the production strategy can be dynamically adjusted according to the product quality, and flexible production is realized. Therefore, the production efficiency is improved, the occupied space is reduced, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 A flow chart of a full-automatic LCD detection and discharging method provided by the embodiments of the present application.

[0019] Figure 2 A structure block diagram of an automatic LCD detection and discharging device provided by the embodiments of the present application.

[0020] Figure 3 A structural schematic diagram of an automatic LCD detection and blanking device is provided for an embodiment of the present application.

[0021] Figure 4 A structural diagram of an electronic device for automatic LCD detection and blanking is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0022] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components have the same or similar designations and functions throughout the various figures and embodiments. The embodiments described below are exemplary only, and are not intended to be limiting of the present application.

[0023] In order to make the technical personnel of the present application better understand the scheme, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] In the embodiments of the present application, at least one means one or more; and multiple means two or more. In the description of the present application, the terms "first", "second", "third" and the like are only used to distinguish the described purposes, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating or implying order.

[0025] In the present specification, the reference "an embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the terms "include", "contain", "have" and their variants in the present specification mean "include but not limited to", unless otherwise specifically emphasized. It should be noted that in the embodiments of the present application, the "and / or" description of the associated objects represents that there can be three relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone.

[0026] It should be noted that in the embodiments of the present application, when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intermediate component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intermediate component. When a component is referred to as being "disposed" on another component, it can be directly disposed on the other component or there can be an intermediate component. Meanwhile, "connected" in the embodiments of the present application can also be understood as electrical connection, and the connection between two electrical elements can be direct or indirect. For example, A is connected to B, which can mean that A is directly connected to B, or A and B are indirectly connected through one or more other electrical elements. The terms "vertical", "horizontal", "left", "right" and the like used in the embodiments of the present application are for illustrative purposes only and are not intended to limit the present application.

[0027] Please refer to Figure 1 , Figure 1 is a flow chart of a full-automatic LCD detection and unloading method provided by the embodiments of the present application. The full-automatic LCD detection and unloading method provided by the embodiments of the present application comprises the following steps:

[0028] Step S1, receiving an LCD panel by the central control system 5 controlling the feeding belt assembly 11, and temporarily storing the LCD panel in the buffer area;

[0029] Specifically, the central control system 5 can serve as the core control unit of the entire LCD detection and blanking system. The central control system 5 is used to coordinate and control the operation of each functional module. The central control system 5 can be an integrated control system based on a programmable logic controller (PLC) and an industrial host controller (PC). The central control system 5 can establish a communication connection with the drive controller of the feeding belt assembly 11 through an industrial communication bus to control the feeding belt assembly 11. The width of the feeding belt assembly 11 can be set according to the maximum size of the LCD panel to be detected, so that the LCD panel can be stably placed on the belt. The conveying speed of the feeding belt assembly 11 is adjustable to adapt to the needs of different production rhythms. When the LCD panel is placed at the starting end of the feeding belt assembly 11, the central control system 5 can first detect the presence of the LCD panel through the photoelectric sensor located at the starting end of the feeding belt assembly 11, and then control the feeding belt assembly 11 to run at a preset speed to convey the LCD panel to the buffer area. The buffer area can be located at the end of the feeding belt assembly 11 and used to temporarily store the LCD panel to enable the subsequent detection process to proceed in an orderly manner. In addition, the buffer space can also be divided into multiple independent storage units, each unit being equipped with a homing sensor for detecting whether the LCD panel has been correctly placed. When the LCD panel reaches the designated position of the buffer area, the central control system 5 receives the signal from the homing sensor and immediately controls the feeding belt assembly 11 to stop running, thereby completing the temporary storage operation of the LCD panel. A structure with a small groove can be provided on the surface of the feeding belt assembly 11 to increase the contact area with the LCD panel and improve the friction to prevent the LCD panel from slipping during conveying. Adjustable baffles or guide rails can also be installed on both sides of the feeding belt assembly 11 to limit the lateral movement of the LCD panel, so that the LCD panel always remains in the center position of the belt. In actual operation, the central control system 5 can also dynamically adjust the operating parameters of the feeding belt assembly 11, such as the start and stop time of the feeding belt assembly 11 and the conveying speed, to adapt to the production requirements of different models of LCD panels. Through automatic receiving and temporary storage of the LCD panel, stable material supply can be provided for the subsequent detection process, eliminating the uncertainty of the manual feeding link in traditional production lines, which is conducive to improving production efficiency, effectively balancing the production rhythm difference between the upper and lower processes, realizing the continuity of the production process, reducing equipment idle time, and improving equipment utilization.

[0030] Step S2, the central control system 5 controls the moving mechanism to carry the LCD panel located in the buffer area to the detection station of the defect detection platform 212;

[0031] Before step S2, it also includes: initially positioning the LCD panel by a visual positioning system to position the LCD panel at the detection station.

[0032] The step S2 includes: controlling the detection taking-out X-axis assembly 2211 and the detection carrying Y-axis assembly 2212 of the mobile mechanism respectively by the central control system 5, driving the LCD panel to move along the direction of X-axis or Y-axis, and carrying the LCD panel located in the buffer area to the detection station of the defect detection platform 212.

[0033] Specifically, the central control system 5 can first perform initial positioning on the LCD panel in the buffer area through the visual positioning system. The visual positioning system can include an industrial camera, a lens, a light source, and an image processing unit. When the visual positioning system is working, the central control system 5 first sends a collection instruction, and the industrial camera captures the image information of the LCD panel in the buffer area. Then the image processing unit performs a series of processing on the obtained image, including image preprocessing, feature extraction, and position calculation. By identifying the feature points of the LCD panel, such as the four corner points, the position and attitude information of the LCD panel in the coordinate system is calculated, including the X coordinate, the Y coordinate, and the rotation angle. The above information will be used as the reference data for the moving mechanism to perform the carrying task. The moving mechanism can include a detection taking X-axis assembly 2211 and a detection conveying Y-axis assembly 2212. The detection taking X-axis assembly 2211 and the detection conveying Y-axis assembly 2212 can both adopt a linear guide rail and a ball screw transmission mechanism, and the driving mode is an AC servo motor direct driving. The detection taking X-axis assembly 2211 drives the detection conveying Y-axis assembly 2212 to move in the X-axis direction, and the stroke can match the distance between the buffer area and the detection station. The detection conveying Y-axis assembly 2212 drives the suction nozzle for carrying the LCD panel to move in the Y-axis direction, and the stroke can match the width of the buffer area. In addition, the end effector of the moving mechanism can adopt a vacuum suction disc grabbing mechanism, which can be composed of multiple vacuum suction discs arranged in an array and uniformly distributed on the support surface of the LCD panel, so as to avoid damaging the surface of the LCD panel. In the specific operation, the central control system 5 calculates the motion trajectory of the moving mechanism according to the position information of the LCD panel provided by the visual positioning system. Then the central control system 5 sends a motion instruction to the servo driver of the detection taking X-axis assembly 2211 and the detection conveying Y-axis assembly 2212, respectively, to control the moving mechanism to move to the specified position above the LCD panel. Then the central control system 5 controls the vacuum system to be turned on, so that the vacuum suction disc of the above end effector contacts the surface of the LCD panel and establishes negative pressure, thereby realizing the grabbing of the LCD panel. After the grabbing is completed, the central control system 5 controls the detection taking X-axis assembly 2211 and the detection conveying Y-axis assembly 2212 again, so that the moving mechanism drives the LCD panel to move along the predetermined trajectory to above the detection station of the defect detection platform 212. Then the central control system 5 controls the vacuum system to be turned off to release the LCD panel, thereby completing the carrying process and enabling the LCD panel to be placed on the detection station for the following defect detection.

[0034] Step S3, controlling the defect detection camera assembly 213 to perform appearance defect and display performance defect detection on the LCD panel located in the detection station through the central control system 5 to obtain appearance detection information and display detection information;

[0035] The appearance detection information includes surface scratch information, foreign matter information and edge collapse defect information of the LCD panel; and the display detection information includes bright spot information, dark spot information and color cast defect information of the LCD panel.

[0036] Specifically, the central control system 5 can control the defect detection camera assembly 213 to comprehensively detect the LCD panel placed on the detection station, and the detection process can be divided into appearance defect detection and display performance defect detection. The appearance defect detection can be performed by checking the physical surface state of the LCD panel, and the detection objects include surface scratch, foreign matter and edge collapse, etc. For example, a scanning camera and a light source cooperating therewith can be used to effectively detect different types of defects. The appearance defect detection can be pre-set with an image processing algorithm for effectively identifying and classifying various surface defects. For example, the surface scratch can be identified and evaluated by detecting the length, width, depth and direction of the linear feature; the foreign matter can be identified and evaluated by detecting the size, shape, color and distribution of the spot feature; and the edge collapse defect can be identified and evaluated by detecting the integrity and regularity of the edge of the LCD panel. The display performance defect detection can check the optical performance of the LCD panel under the powered display state, and the detection objects include bright spot, dark spot and color cast, etc. For example, a display driving circuit can be used to input various test signals to the LCD panel according to a pre-set test sequence, and a face array camera can be used to capture the brightness and color changes in the display image of the LCD panel to effectively detect each pixel point. By comparing the differences between the actual display image and the ideal reference image, various display defects can be identified and located. In addition, after the detection is completed, the central control system 5 can integrate and store the appearance detection information and the display detection information to form the detection result of the corresponding LCD panel. For example, the detection result can include the type of defect, the number of the corresponding LCD panel, etc. to provide a basis for subsequent quality judgment.

[0037] In step S4, the central control system 5 controls the moving mechanism to carry the LCD panel from the detection station to the positioning station.

[0038] Specifically, the moving mechanism can include the detection and taking X-axis assembly 2211 and the detection and carrying Y-axis assembly 2212 described above. Before the carrying process starts, the central control system 5 will first confirm that the defect detection in step S3 has been completed and that the LCD panel state of the detection station is normal, and the carrying can be carried out. Then the central control system 5 sends a motion instruction to the moving mechanism to control the detection and taking X-axis assembly 2211 and the detection and carrying Y-axis assembly 2212 respectively, so that after the moving mechanism moves to the specified position above the detection station, the central control system 5 controls the vacuum system to be turned on, so that the vacuum suction cup of the end effector contacts the surface of the LCD panel and establishes negative pressure, realizing the grabbing of the LCD panel. After the grabbing is completed, the central control system 5 controls the detection and taking X-axis assembly 2211 and the detection and carrying Y-axis assembly 2212 again, so that the moving mechanism drives the LCD panel to move along the predetermined track to above the positioning station. When the moving mechanism reaches above the positioning station, the central control system 5 controls the moving mechanism to be positioned, so that the LCD panel can be accurately placed at the predetermined position of the positioning station. After the positioning is completed, the central control system 5 controls the vacuum system to slowly release the negative pressure, so that the LCD panel is placed on the positioning station. After the placing is completed, the central control system 5 confirms that the LCD panel has been stably placed on the positioning station, and can also record the current position and state of the LCD panel, to facilitate the following precision detection.

[0039] Step S5, the central control system 5 controls the precision detection camera assembly 222 to perform size precision detection on the LCD panel located on the positioning station to obtain precision detection information.

[0040] The precision detection information includes diagonal deviation information, edge flatness information and thickness size information of the LCD panel.

[0041] Specifically, the central control system 5 controls the precision detection camera assembly 222 to perform size precision detection on the LCD panel placed on the positioning station, and can obtain diagonal line deviation, edge flatness and thickness size information. Diagonal line deviation detection can be used to measure the length difference of the two diagonal lines of the LCD panel to evaluate whether the geometric shape of the LCD panel is regular. Edge flatness detection can be used to evaluate the flatness and smoothness of the edge of the LCD panel, and detect whether the edge has defects such as unevenness, wavy deformation, etc. Thickness size detection can be used to measure the thickness of the LCD panel and the uniformity of the LCD panel to evaluate whether the thickness of the LCD panel meets the required design requirements, such as whether there is a thickness unevenness. During the detection process, the central control system 5 first confirms that the LCD panel has been placed on the positioning station, and then sends a detection instruction to the precision detection camera assembly 222 to start the detection process. After the detection process is started, the precision detection camera assembly 222 will complete the detection of the diagonal line deviation, the edge flatness and the thickness size in sequence according to the preset detection sequence, and will transmit the detection results to the central control system 5 in real time. The central control system 5 compares the above detection results with the preset standard to determine whether the LCD panel meets the requirements.

[0042] Step S6, determining whether the LCD panel is qualified according to the appearance detection information, the display detection information and the precision detection information, and a preset shunt rule.

[0043] The preset shunt rule includes: when the appearance detection information, the display detection information and the precision detection information all meet the preset qualified standard, determining that the LCD panel is qualified; and when any one of the appearance detection information, the display detection information or the precision detection information does not meet the preset qualified standard, determining that the LCD panel is unqualified.

[0044] Specifically, the central control system 5 can comprehensively evaluate and judge the quality of the LCD panel according to the appearance detection information, the display detection information and the precision detection information obtained in the above steps, and the preset diversion rule, to determine whether the LCD panel is qualified. In the actual judgment process, the central control system 5 can first read the diversion rule corresponding to the model of the currently detected LCD panel from the database, such as the qualified standard and judgment logic of each parameter. Then the central control system 5 compares the appearance detection information and the display detection information obtained in the above step S3, and the precision detection information obtained in the above step S5, with the above qualified standard one by one. For example, each specific parameter can be judged, such as each scratch, each bright spot, each diagonal line deviation, etc., to determine whether it meets the corresponding qualified standard. According to the preset diversion rule, when the appearance detection information, the display detection information and the precision detection information all meet the preset qualified standard, the central control system 5 determines that the LCD panel is qualified; when any one of the appearance detection information, the display detection information or the precision detection information does not meet the preset qualified standard, the central control system 5 determines that the LCD panel is unqualified. After the judgment is completed, the central control system 5 can record the judgment result, such as the qualified or unqualified condition, to the database, and associate it with the unique identification of the LCD panel, such as the serial number or the bar code, to form a complete quality traceability record. Through the above judgment result, the material flow direction can be determined, which is beneficial to improve the intelligentization and automation of the production process.

[0045] Step S7, if yes, the central control system 5 controls the conveying mechanism to convey the LCD panel to the empty tray position stack;

[0046] The step S7 includes: the central control system 5 controls the unloading X-axis assembly 311 and the NG belt line assembly 312 of the conveying mechanism respectively, to drive the unloading suction nozzle mechanism 313 to move along the direction of the X-axis or the direction of the Y-axis, so as to convey the LCD panel to the empty tray position stack.

[0047] Specifically, when the step S6 determines that the LCD panel is qualified, the central control system 5 can control the conveying mechanism to convey the LCD panel to the empty tray position stack, so that the qualified LCD panel can be correctly stacked and stored, preparing for subsequent packaging and transportation. The conveying mechanism can include a discharging X-axis assembly 311 and an NG belt line assembly 312, realizing two-dimensional motion in the horizontal plane. The discharging X-axis assembly 311 and the NG belt line assembly 312 can each adopt a linear guide rail and a ball screw transmission mechanism, and the driving mode can be direct driving by a servo motor. The stroke of the discharging X-axis assembly 311 driving the NG belt line assembly 312 to move in the X-axis direction can match the distance between the positioning station and the empty tray position. The stroke of the NG belt line assembly 312 driving the end effector to move in the Y-axis direction can match the arrangement width of the plurality of empty tray positions. The end effector can include a discharging suction nozzle mechanism 313, such as an array of multiple vacuum suction cups uniformly distributed on the support surface of the LCD panel. The empty tray position can be used to stack the qualified LCD panel. Before the conveying process starts, the central control system 5 will first confirm that the determination result of the step S6 is qualified, and select a suitable empty tray position as the target position. The basis for selecting the empty tray position can include the current stacking state of the empty tray position. Then the central control system 5 sends a motion instruction to the conveying mechanism to control the discharging X-axis assembly 311 and the NG belt line assembly 312, so that the conveying mechanism moves to a designated position above the positioning station. Then the central control system 5 controls the vacuum system of the discharging suction nozzle mechanism 313 to turn on, so that the vacuum suction cup contacts the surface of the LCD panel and establishes negative pressure, realizing the grasping of the LCD panel. After grasping is completed, the central control system 5 controls the discharging X-axis assembly 311 and the NG belt line assembly 312 again, so that the conveying mechanism drives the LCD panel to move along a predetermined trajectory to the selected empty tray position above. When the conveying mechanism reaches above the empty tray position, the central control system 5 controls the conveying mechanism to position, so that the LCD panel can be placed on the stacking position. After positioning is completed, the central control system 5 can control the vacuum system of the discharging suction nozzle mechanism 313 to release the negative pressure, so that the LCD panel is placed on the empty tray position or the already stacked LCD panel. In addition, after placement is completed, the central control system 5 can also confirm that the LCD panel has been successfully stacked through the stacking height sensor and the counter, and record the stacking quantity and state of the current empty tray position. Each empty tray position can also be provided with a stacking height limit. If the stacking height reaches the preset safety limit, the central control system 5 will automatically stop stacking to the empty tray position, and issue a prompt information to replace a new empty tray. Through the automatic conveying and stacking process, manual intervention can be reduced, and production efficiency can be improved.

[0048] Step S8, if not, the central control system 5 controls the conveying mechanism to convey the LCD panel to the NG belt 321 discharge station;

[0049] Specifically, when the step S6 determines that the LCD panel is unqualified, the central control system 5 controls the conveying mechanism to convey the LCD panel to the NG belt 321 discharge station, so that the unqualified LCD panel can be discharged from the production line in time to avoid mixing with qualified products, and facilitate subsequent repair or scrap processing. The NG belt 321 can be used to receive and transport unqualified LCD panels, and the width of the NG belt 321 matches the maximum size of the LCD panel to be discharged, so that the LCD panel can be stably placed on the NG belt 321. In addition, sensors can also be provided on the NG belt 321 to monitor and manage the discharge process of unqualified products, such as a presence sensor at the entrance of the NG belt 321 for detecting whether the LCD panel has been correctly placed on the belt, a plurality of photoelectric sensors along the NG belt 321 for monitoring the conveying state of the LCD panel, and a counting sensor at the exit of the NG belt 321 for counting the number of unqualified products discharged. The NG belt 321 can adjust the conveying speed according to the production demand through the adjustable speed drive motor, so as to adapt to different discharge rhythms. Before the conveying process starts, the central control system 5 first confirms that the determination result of the step S6 is unqualified, and confirms that the NG belt 321 is in a ready state and can receive new unqualified products. Then the central control system 5 sends a motion instruction to the conveying mechanism to control the unloading X-axis assembly 311 and the NG belt line assembly 312 respectively, so that the conveying mechanism moves to a specified position above the positioning station. Then the central control system 5 controls the vacuum system of the unloading suction nozzle mechanism 313 to open, so that the vacuum suction disc contacts the surface of the LCD panel and establishes negative pressure, realizing the grabbing of the LCD panel. After grabbing is completed, the central control system 5 controls the unloading X-axis assembly 311 and the NG belt line assembly 312 again, so that the conveying mechanism drives the LCD panel to move along the predetermined trajectory to above the NG belt 321. When the conveying mechanism reaches above the NG belt 321, the central control system 5 controls the conveying mechanism to position, so that the LCD panel can be placed on the NG belt 321. Then the central control system 5 controls the vacuum system of the unloading suction nozzle mechanism 313 to release the negative pressure, and places the LCD panel on the NG belt 321. In addition, after placement is completed, the central control system 5 can confirm that the LCD panel has been successfully placed on the NG belt 321 through the presence sensor, and then controls the NG belt 321 to start to transport the LCD panel to the discharge area. The central control system 5 can also be connected with the quality management system to automatically generate an unqualified product report, record detailed information of each unqualified product, such as serial number, unqualified reason, detection data, etc., which is beneficial to quality and improvement analysis. Through the continuous production process, the continuous operation and high efficiency of the production line can be realized, and the downtime waiting time caused by delayed material handling can be reduced.

[0050] The full-automatic LCD detection and blanking method provided by the embodiment of the application further comprises: when it is detected that the stacking number of the LCD panel on the first empty tray position 3221 reaches a preset full load threshold, a new empty tray is grabbed from the first empty tray buffer position 3231 to the first empty tray position 3221 by the first empty tray X-axis assembly 41; and when it is detected that the stacking number of the LCD panel on the second empty tray position 3222 reaches a preset full load threshold, a new empty tray is grabbed from the second empty tray buffer position 3232 to the second empty tray position 3222 by the second empty tray X-axis assembly 42.

[0051] Specifically, to realize the continuous automatic operation of the production line, when the number of stacked LCD panels on the empty tray position reaches the preset full load threshold, the central control system 5 will automatically replace the full empty tray with a new empty tray from the empty tray buffer position, so that the production line can continue to run to avoid downtime waiting time caused by insufficient empty trays. The first empty tray position 3221 and the second empty tray position 3222 can be used to alternately stack qualified LCD panels, so that when one empty tray position is full, the central control system 5 can automatically switch to the other empty tray position for continuous stacking, and the full empty tray position can be replaced with an empty tray to realize non-stop tray replacement and improve production efficiency. The full load threshold refers to the maximum number of stacked LCD panels on the empty tray position, so that the stacking is not too high to cause instability, nor too low to cause frequent tray replacement. The empty tray buffer position can be used to store empty trays, which can store multiple empty trays at the same time, facilitate the replenishment of empty trays by operators, and also reduce the frequency of manual replenishment. For example, an empty tray detection sensor can be provided on the empty tray buffer position to detect whether there is an available empty tray. The empty tray X-axis can be used to grab and place the empty tray, such as a linear motion mechanism that can move in the X-axis direction. The end effector of the empty tray X-axis can use mechanical clamps, vacuum suction cups or magnetic attraction, etc. to stably grab and place the empty tray. In specific operation, when the central control system 5 detects that the number of stacked LCD panels on the first empty tray position 3221 reaches the preset full load threshold, the central control system 5 will first confirm that the first empty tray X-axis assembly 41 is in a ready state, and that the first empty tray buffer position 3231 has an available empty tray. Then the central control system 5 sends a motion instruction to the first empty tray X-axis assembly 41 to control the first empty tray X-axis assembly 41 to move to a designated position above the first empty tray buffer position 3231. Then the central control system 5 controls the grabbing mechanism of the first empty tray X-axis assembly 41 to start to grab the empty tray on the first empty tray buffer position 3231. After grabbing is completed, the central control system 5 controls the first empty tray X-axis assembly 41 again to make the first empty tray X-axis assembly 41 move along the predetermined trajectory with the empty tray above the first empty tray position 3221. When the first empty tray X-axis assembly 41 reaches above the first empty tray position 3221, the central control system 5 controls the first empty tray X-axis assembly 41 to position so that the empty tray can be placed on the first empty tray position 3221. In addition, after placement is completed, the central control system 5 can also confirm through the sensor that the empty tray has been successfully placed. Since the placement method of the LCD panels on the second empty tray position 3222 is the same as that of the LCD panels on the first empty tray position 3221 described above, it will not be repeated here. Through the automatic replenishment and replacement of the empty tray, non-stop tray replacement is realized, so that the production line can continuously and automatically run to avoid downtime waiting time caused by insufficient empty trays, which is beneficial to improve production efficiency and make the production line run stably.

[0052] In order to make a detailed explanation of the automatic LCD detection and discharging device provided by the application, the above embodiment makes a detailed description of an automatic LCD detection and discharging method. Based on the same inventive concept, the application also provides an automatic LCD detection and discharging device.

[0053] Please refer to Figure 2 and Figure 3 , Figure 2 is a structural diagram of an automatic LCD detection and discharging device provided by an embodiment of the application, Figure 3 is a structural diagram of an automatic LCD detection and discharging device provided by an embodiment of the application. The automatic LCD detection and discharging device is used to execute the automatic LCD detection and discharging method described above. The automatic LCD detection and discharging device includes an entry buffer module 1, a multi-dimensional detection module 2, a discharging module 3, an empty tray replenishing mechanism, and a central control system 5. The entry buffer module 1 includes an entry belt assembly 11 with a buffer area. The entry belt assembly 11 is used to receive an LCD panel and temporarily store the LCD panel in the buffer area. The multi-dimensional detection module 2 is used to detect defects of the LCD panel after visual positioning and output defect information. The defect information includes appearance detection information, display detection information, and precision detection information. The discharging module 3 includes a conveying mechanism and a classification mechanism. The classification mechanism includes an NG belt 321, at least two empty tray positions arranged on one side of the NG belt 321, and empty tray buffer positions arranged on the other side of the NG belt 321 and corresponding to the empty tray positions. The empty tray replenishing mechanism is used to replenish empty trays when the qualified products are stacked to full capacity on any empty tray position. The central control system 5 communicates with the entry buffer module 1, the multi-dimensional detection module 2, and the discharging module 3 in real time. The central control system 5 is configured to determine whether the LCD panel is qualified according to the defect information and a preset shunting rule. If the LCD panel is qualified, the conveying mechanism is driven to convey the LCD panel to the corresponding empty tray position for stacking. If the LCD panel is not qualified, the conveying mechanism is driven to convey the LCD panel to the NG belt 321 discharge station.

[0054] The feeding buffer module 1 includes a feeding belt assembly 11 with a buffer area, which is used to receive the LCD panel and temporarily store the LCD panel in the buffer area to provide stable material supply for the subsequent detection process. The multi-dimensional detection module 2 is arranged downstream of the buffer area, which is used to comprehensively detect the defects of the LCD panel after visual positioning, and output the defect information including the appearance detection information, display detection information and precision detection information, which can be used as the basis for judging the quality of the LCD panel after being transmitted to the central control system 5. The multi-dimensional detection module 2 can include a defect detection platform 212, a defect detection camera assembly 213 and a precision detection camera assembly 222. The LCD panel to be detected is placed on the defect detection platform 212, the defect detection camera assembly 213 is used to detect the appearance defects and display performance defects of the LCD panel, and the precision detection camera assembly 222 is used to detect the dimensional accuracy of the LCD panel.

[0055] The feeding buffer module 1 includes a feeding belt assembly 11 with a buffer area, which is used to receive the LCD panel and temporarily store the LCD panel in the buffer area to provide stable material supply for the subsequent detection process. The multi-dimensional detection module 2 is arranged downstream of the buffer area, which is used to comprehensively detect the defects of the LCD panel after visual positioning, and output the defect information including the appearance detection information, display detection information and precision detection information, which can be used as the basis for judging the quality of the LCD panel after being transmitted to the central control system 5. The multi-dimensional detection module 2 can include a defect detection platform 212, a defect detection camera assembly 213 and a precision detection camera assembly 222. The LCD panel to be detected is placed on the defect detection platform 212, the defect detection camera assembly 213 is used to detect the appearance defects and display performance defects of the LCD panel, and the precision detection camera assembly 222 is used to detect the dimensional accuracy of the LCD panel. Figure 3 As shown in the figure, the central control system 5 can communicate with each functional module in real time through an industrial communication network, such as using field bus or industrial Ethernet for communication, for real-time and reliable data transmission.

[0056] The central control system 5 can determine whether the LCD panel is qualified according to the defect information and the preset shunting rule, and control the conveying mechanism to convey the LCD panel to the corresponding position. For example, when the appearance detection information, the display detection information and the precision detection information all meet the preset qualified standard, the central control system 5 determines that the LCD panel is qualified, and drives the conveying mechanism to convey the LCD panel to the corresponding empty tray position for stacking. When any one of the appearance detection information, the display detection information or the precision detection information does not meet the preset qualified standard, the central control system 5 determines that the LCD panel is unqualified, and drives the conveying mechanism to convey the LCD panel to the NG belt 321 discharge station, which can effectively guarantee product quality.

[0057] In the embodiment, the LCD panel is received by the feeding belt assembly 11 of the feeding buffer module 1, and temporarily stored in the buffer area on the feeding belt assembly 11. The multi-dimensional detection module 2 detects defects of the LCD panel after visual positioning and outputs defect information, which includes appearance detection information, display detection information and precision detection information. At least two empty tray positions in the discharging module 3 are arranged on one side of the NG belt, and the empty tray buffer positions corresponding to the empty tray positions are arranged on the other side of the NG belt 321. The empty tray replenishment mechanism replenishes empty trays when the qualified products are fully stacked in any one of the empty tray positions. The central control system communicates with the feeding buffer module, the multi-dimensional detection module and the discharging module in real time, and is configured to determine whether the LCD panel is qualified according to the defect information and the preset shunting rule. If yes, the conveying mechanism conveys the LCD panel to the corresponding empty tray position for stacking. If no, the conveying mechanism conveys the LCD panel to the NG belt 321 discharge station. In this way, during the detection and discharging of the LCD panel, the central control system 5 controls the feeding, conveying, detection and sorting processes as a whole, and uniformly dispatches each functional unit to eliminate the waiting and connection time between processes in the traditional production line, realize continuous automatic operation of the detection and discharging links, avoid manual intervention and process interruption, form an integrated operation process of detection and discharging, reduce equipment space occupation and improve production rhythm, and centrally process and shunt the defect detection and precision detection data on the same platform, which can realize comprehensive evaluation of the quality of the LCD panel without manual intervention, dynamically adjust the production strategy according to the product quality status, and realize flexible production. Thus, the technical effect of improving production efficiency and reducing space occupation is achieved, which is beneficial to cost reduction.

[0058] As an implementation form, the multi-dimension detection module 2 comprises an appearance display defect detection sub-module and a size precision detection sub-module. The appearance display defect detection sub-module comprises a sheet feeding detection X-axis assembly 211, a defect detection platform 212 and a defect detection camera assembly 213. The sheet feeding detection X-axis assembly 211 is used to carry the LCD panel located in the buffer area to the detection station of the defect detection platform 212. The defect detection camera assembly 213 is used to detect the surface defects and display performance defects of the LCD panel located in the detection station. The size precision detection sub-module comprises a moving mechanism and a precision detection camera assembly 222. The moving mechanism is used to carry the LCD panel from the detection station to the positioning station. The precision detection camera assembly 222 is used to detect the size precision of the LCD panel. The appearance display defect detection sub-module comprises the sheet feeding detection X-axis assembly 211, the defect detection platform 212 and the defect detection camera assembly 213. The sheet feeding detection X-axis assembly 211 can carry the LCD panel located in the buffer area to the detection station of the defect detection platform 212. The defect detection platform 212 can support and fix the LCD panel to be detected. The defect detection camera assembly 213 can detect the surface defects and display performance defects of the LCD panel located in the detection station. The size precision detection sub-module comprises the moving mechanism and the precision detection camera assembly 222. The moving mechanism is used to carry the LCD panel from the detection station to the positioning station. The precision detection camera assembly 222 is used to detect the size precision of the LCD panel. That is, the multi-dimension detection module 2 is used to comprehensively detect the LCD panel, so as to obtain the appearance detection information, the display detection information and the precision detection information.

[0059] In order to make a detailed explanation of the electronic equipment for full-automatic LCD detection and unloading provided by the application, the above-mentioned embodiment makes a detailed description of a full-automatic LCD detection and unloading method. Based on the same inventive concept, the application further provides an electronic equipment for full-automatic LCD detection and unloading.

[0060] Please refer to Figure 4 , Figure 4 is a structural diagram of the electronic equipment for full-automatic LCD detection and unloading provided by the embodiment of the application. The embodiment of the application provides an electronic equipment for full-automatic LCD detection and unloading. The electronic equipment for full-automatic LCD detection and unloading comprises a memory 310, a processor 320 and a computer program 311 stored in the memory 310 and capable of running on the processor 320. When the processor 320 executes the program, the following steps are realized:

[0061] S1, the central control system 5 is used to control the feeding belt assembly 11 to receive the LCD panel, and the LCD panel is temporarily stored in the buffer area.

[0062] S2, control the mobile mechanism to carry the LCD panel in the buffer area to the detection station of the defect detection platform 212 by the central control system 5;

[0063] S3, control the defect detection camera assembly 213 to detect the appearance defect and display performance defect of the LCD panel in the detection station by the central control system 5, to obtain appearance detection information and display detection information;

[0064] S4, control the mobile mechanism to carry the LCD panel from the detection station to the positioning station by the central control system 5;

[0065] S5, control the precision detection camera assembly 222 to detect the size precision of the LCD panel in the positioning station by the central control system 5, to obtain precision detection information;

[0066] S6, judge whether the LCD panel is qualified according to the appearance detection information, the display detection information and the precision detection information, and the preset shunt rule;

[0067] S7, if yes, control the conveying mechanism to carry the LCD panel to the empty tray position stack by the central control system 5;

[0068] S8, if no, control the conveying mechanism to carry the LCD panel to the NG belt 321 discharge station by the central control system 5.

[0069] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A full-automatic LCD detection blanking method, characterized in that, The full-automatic LCD detection and unloading method comprises S1, receiving an LCD panel by a central control system controlling an inlet belt assembly, and temporarily storing the LCD panel in a buffer area; S2, transporting the LCD panel in the buffer area to a detection station of a defect detection platform by a central control system controlling a moving mechanism; S3, detecting appearance defects and display performance defects of the LCD panel in the detection station by a central control system controlling a defect detection camera assembly, to obtain appearance detection information and display detection information; S4, transporting the LCD panel from the detection station to a positioning station by a central control system controlling the moving mechanism; S5, detecting size precision of the LCD panel in the positioning station by a central control system controlling a precision detection camera assembly, to obtain precision detection information; S6, judging whether the LCD panel is qualified according to the appearance detection information, the display detection information, the precision detection information, and a preset shunt rule; S7, if yes, transporting the LCD panel to a empty tray stack by a central control system controlling a conveying mechanism; S8, if no, transporting the LCD panel to an NG belt discharge station by a central control system controlling the conveying mechanism.

2. The full-automatic LCD detection and blanking method according to claim 1, characterized in that, The appearance detection information comprises surface scratch information, foreign matter information, and edge collapse defect information of the LCD panel; the display detection information comprises bright spot information, dark spot information, and color deviation defect information of the LCD panel; and the precision detection information comprises diagonal line deviation information, edge flatness information, and thickness size information of the LCD panel.

3. The full-automatic LCD detection and blanking method according to claim 1, characterized in that, Before step S2, the method further comprises: initially positioning the LCD panel by a visual positioning system, so that the LCD panel is positioned in the detection station.

4. The full-automatic LCD detection and blanking method according to claim 1, characterized in that, The preset shunt rule comprises: when the appearance detection information, the display detection information, and the precision detection information all meet a preset qualified standard, determining that the LCD panel is qualified; and when any one of the appearance detection information, the display detection information, or the precision detection information does not meet the preset qualified standard, determining that the LCD panel is unqualified.

5. The fully automatic LCD inspection and blanking method according to claim 1, wherein, S2 comprises: respectively controlling a detection material taking X-axis assembly and a detection conveying Y-axis assembly of the moving mechanism by a central control system, to drive the LCD panel to move along the direction of the X-axis or the direction of the Y-axis, to transport the LCD panel in the buffer area to the detection station of the defect detection platform.

6. The fully automatic LCD inspection and blanking method according to claim 1, wherein, S7 comprises: respectively controlling a unloading X-axis assembly and an NG belt line assembly of the conveying mechanism by a central control system, to drive a unloading suction nozzle mechanism to move along the direction of the X-axis or the direction of the Y-axis, to transport the LCD panel to the empty tray stack.

7. The fully automatic LCD inspection and blanking method according to claim 1, wherein, The full-automatic LCD detection and unloading method further comprises: when it is detected that the stacking number of the LCD panels on the first empty tray position reaches a preset full load threshold, a new empty tray is grabbed from the first empty tray buffer position to the first empty tray position by a first empty tray X-axis assembly; when it is detected that the stacking number of the LCD panels on the second empty tray position reaches a preset full load threshold, a new empty tray is grabbed from the second empty tray buffer position to the second empty tray position by a second empty tray X-axis assembly.

8. An automatic LCD inspection blanking device, characterized by, The automatic LCD detection and unloading device is used to execute the automatic LCD detection and unloading method according to any one of claims 1 to 7, and comprises an inlet buffer module, a multi-dimensional detection module, an unloading module, an empty tray supply mechanism and a central control system. The inlet buffer module comprises an inlet belt assembly with a buffer area, which is used to receive the LCD panel and temporarily store the LCD panel in the buffer area. The multi-dimensional detection module is used to detect defects of the LCD panel after visual positioning and output defect information, which comprises appearance detection information, display detection information and precision detection information. The unloading module comprises a conveying mechanism, a classification mechanism, at least two empty tray positions arranged on one side of the NG belt, and empty tray buffer positions arranged on the other side of the NG belt and corresponding to the empty tray positions. The empty tray supply mechanism is used to supply empty trays when the stacking of qualified products in any empty tray position is full. The central control system is in real-time communication with the inlet buffer module, the multi-dimensional detection module and the unloading module, and is configured to determine whether the LCD panel is qualified according to the defect information and a preset shunt rule. If yes, the conveying mechanism is driven to convey the LCD panel to the corresponding empty tray position for stacking. If no, the conveying mechanism is driven to convey the LCD panel to the NG belt discharge station.

9. The automatic LCD inspection blanking device according to claim 8, wherein, The multi-dimensional detection module comprises an appearance and display defect detection submodule and a size and precision detection submodule. The appearance and display defect detection submodule comprises a sheet feeding and detection X-axis assembly, a defect detection platform and a defect detection camera assembly. The sheet feeding and detection X-axis assembly is used to convey the LCD panel in the buffer area to a detection station of the defect detection platform. The defect detection camera assembly is used to detect surface defects and display performance defects of the LCD panel in the detection station. The size and precision detection submodule comprises a moving mechanism and a precision detection camera assembly. The moving mechanism is used to convey the LCD panel from the detection station to a positioning station, and the precision detection camera assembly is used to detect the size and precision of the LCD panel.

10. A full-automatic electronic device for detecting blanking of an LCD, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the program to implement the following steps: S1, receiving the LCD panel by the inlet belt assembly controlled by the central control system, and temporarily storing the LCD panel in the buffer area; S2, conveying the LCD panel in the buffer area to a detection station of the defect detection platform by the moving mechanism controlled by the central control system; S3, controlling the defect detection camera assembly to detect appearance defects and display performance defects of the LCD panel located at the detection station by the central control system to obtain appearance detection information and display detection information; S4, controlling the moving mechanism to carry the LCD panel from the detection station to the positioning station by the central control system; S5, controlling the precision detection camera assembly to detect the size precision of the LCD panel located at the positioning station by the central control system to obtain precision detection information; S6, judging whether the LCD panel is qualified according to the appearance detection information, the display detection information and the precision detection information, and a preset shunt rule; S7, if yes, controlling the conveying mechanism to carry the LCD panel to the empty tray position stack by the central control system; S8, if no, controlling the conveying mechanism to carry the LCD panel to the NG belt discharge station by the central control system.

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