A nondestructive visual inspection device for liquid crystal display screens

Abstract

The application provides a kind of liquid crystal display screen nondestructive visual inspection device, it is related to laser visual inspection technical field, including passageway type detection table, conveying assembly and built-in conveying table.The application, by being designed to the first region of the downward recess on the conveying belt of conveying assembly upside, and being designed built-in conveying table in the first region, the built-in conveying table obtains power by the conveying belt of conveying assembly, and realizes deceleration, and the built-in conveying table is located at detection station;When using, the workpiece is placed on the conveying assembly, and is conveyed into the built-in conveying table by the conveying assembly at high speed, and the workpiece is stably conveyed on the built-in conveying table, and the workpiece on the built-in conveying table is detected by laser detection assembly, to ensure continuous, stable laser detection, and can effectively avoid motion blur, to ensure accurate imaging.

Description

Technical Field

[0001] This invention relates to the field of optical equipment inspection technology, specifically a non-destructive visual inspection device for liquid crystal displays. Background Technology

[0002] During the manufacturing process of LCD screens, rigorous non-destructive visual inspection of their surface and internal functions is required to detect defects such as bright spots, dark spots, scratches, and mura (cloudiness). Currently, automated visual inspection systems typically use conveyor belts to sequentially transport the screens to the inspection station below the laser inspection assembly.

[0003] To achieve accurate imaging and prevent motion blur, the display screen must be precisely positioned or its speed significantly reduced at the detection point. Existing technologies generally employ two main solutions: one is a whole-system start-stop conveyor, which controls the intermittent movement of the entire conveyor belt to bring the workpiece to a complete stop at the detection station; the other is an independently driven local speed-changing device, which integrates a secondary conveying mechanism driven by an independent motor in the middle of the main conveyor belt. When a workpiece arrives, this mechanism starts and runs at a different speed than the main conveyor belt, thus achieving local speed variation. The whole-system start-stop conveyor suffers from low production efficiency. The inertial impact generated during start-stop can easily cause displacement or vibration of the delicate LCD screen, even leading to potential damage. It also cannot meet the demands of continuous, high-speed production. While the independently driven local speed-changing device achieves continuous conveying, it suffers from complex control and high manufacturing costs. Particularly noteworthy is the difficulty in achieving speed synchronization and phase matching between the two independent drive systems. Sudden speed changes can easily occur at the moment of workpiece handover, causing workpiece vibration, jamming, or surface scratches, severely affecting the stability of the detection image and product yield. Therefore, the present invention provides a non-destructive visual inspection device for liquid crystal displays. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a non-destructive visual inspection device for liquid crystal displays, which solves the problem that workpieces cannot efficiently and smoothly pass through the inspection station during the visual inspection process of liquid crystal displays.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A non-destructive visual inspection device for liquid crystal displays includes: A channel-type inspection station, wherein a laser inspection component is fixedly installed on the top inner side of the channel-type inspection station, and an inspection station is formed on the inner side of the channel-type inspection station and below the laser inspection component; A conveying assembly is arranged along the length of the channel-type testing station, and the upper side of the conveyor belt of the conveying assembly is recessed downward to form a first region; The first region has an internal conveyor platform installed on the upper side of its conveyor belt, which corresponds to the upper side of the conveyor belt of the conveying assembly. The internal conveyor platform obtains power from the conveyor belt of the conveying assembly and achieves deceleration. The built-in conveyor is located at the testing station.

[0006] Preferably, the conveying assembly includes: The frame includes two sets of parallel and spaced side frame panels, the bottoms of which are fixedly connected by a base platform. The roller assembly consists of two sets, which are rotatably mounted at both ends of the inner side of the frame; one of the roller assemblies is an active roller driven by a motor. The guide roller assembly is rotatably mounted on the inner side of the frame, and there are two sets of guide roller assemblies, with the two sets of guide roller assemblies corresponding to the first area; The first belt is mounted on two sets of rollers, and the upper part of the first belt passes over the two sets of guide rollers, forming a downward indentation.

[0007] Preferably, the guide roller group includes a first guide roller and a second guide roller distributed vertically, with the second guide roller located below the first guide roller and close to the first region; The first belt passes above the first guide roller and below the second guide roller.

[0008] Preferably, an inner support plate is fixedly connected to the inner side of the frame and below the upper part of the first belt.

[0009] Preferably, the built-in conveyor table includes: The first support member and the second support member, the side of the side frame plate and the position corresponding to the first area are provided with a notch, the side of the side frame plate and the position corresponding to the side of the notch are fixedly connected with an L-shaped side plate frame, the two sets of side frame plates correspond to two L-shaped side plate frames, the first support member and the second support member are both installed longitudinally between the two L-shaped side plate frames, and the first support member and the second support member are distributed at both ends of the L-shaped side plate frame; The driven wheel assembly is rotatably mounted on the second support member via a shaft bracket; A drive pulley assembly is mounted on a first support member, and the drive pulley assembly is driven by a first belt through frictional contact. An internal belt is installed between the driven pulley set and the driving pulley set.

[0010] Preferably, the drive wheel assembly includes: A power roller shaft, the end of which is fixedly connected to a number of planetary shafts arranged in a ring array, and each planetary shaft is rotatably mounted with a planetary gear; The support shaft is fixedly installed with the first support member by a bracket. A spindle is fixedly provided at one end of the support shaft. The spindle is rotatably engaged with an end hole opened at the center of the end of the power roller shaft. The side of the spindle is provided with teeth that mesh with planetary gears. The sleeve tooth is rotatably mounted on the end of the power roller shaft, and the inner side of the sleeve tooth meshes with the planetary gear, and the outer side of the sleeve tooth is provided with a semi-circular concave tooth opening. The boom housing is mounted above the sleeve teeth via a suspension bracket. The suspension bracket is fixedly installed with the first support member. The boom housing is an arc-shaped cover, and guide wheels are rotatably mounted at both ends. The internal gear ring is located inside the boom housing, and the outer side of the internal gear ring contacts the guide wheel. The internal gear ring is sleeved on the outer side of the sleeve tooth, so that the inner side of the internal gear ring meshes with the bottom of the sleeve tooth. The upper side of the first belt makes frictional contact with the outer bottom of the internal gear ring.

[0011] Preferably, it further includes: an adjustable support platform, which is installed on the first support member and the second support member, and is used to abut the upper part of the first belt upward so that the upper part of the first belt is in close contact with the inner tooth ring of the built-in belt.

[0012] Preferably, the adjustable support platform includes: A cross-shaped plate component, which is fixedly installed with the first support component and the second support component; A support cylinder is provided, with mounting screws fixedly connected to its bottom and near both ends. The mounting screws are fixedly connected to the cross-shaped plate through a double nut structure.

[0013] Preferably, cover plates are fixedly installed at both ends of the boom housing.

[0014] Preferably, both ends of the built-in conveyor are equipped with unpowered wheels.

[0015] This invention provides a non-destructive visual inspection device for liquid crystal displays. It has the following beneficial effects: This invention features a first recessed area on the upper side of the conveyor belt of the conveyor assembly, within which a built-in conveyor platform is designed. This platform receives power from the conveyor belt and decelerates. The platform is located at the inspection station. In use, the workpiece (LCD screen) is placed on the conveyor assembly and transported at high speed onto the platform. The workpiece is smoothly transported on the platform, and the laser inspection assembly performs laser inspection on the workpiece passing through it, ensuring continuous and stable laser inspection and effectively avoiding motion blur for accurate imaging. In this invention, the built-in conveyor platform is driven by the conveyor assembly, operating at a slower speed than the conveyor assembly. The platform operates in sync with the conveyor assembly, enabling efficient, smooth, and continuous transport of the workpiece through the inspection station, achieving highly stable laser inspection.

[0016] This invention, through the design of a first reduction transmission structure formed by the meshing of the inner side of the internal gear ring with the bottom of the sleeve teeth, and a second reduction transmission structure formed by the sleeve teeth, the power roller shaft, and the teeth (with opposite transmission directions), enables the built-in belt to run smoothly at low speed between the driven pulley set and the driving pulley set, ensuring that the workpiece can stably pass through the detection area and guaranteeing the accuracy of laser detection. Attached Figure Description

[0017] Figure 1 This is a model diagram of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 2 This is a perspective view of a non-destructive visual inspection device for a liquid crystal display screen proposed in this invention; Figure 3 This is a front view of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 4 This is a top view of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 5 This is a side view of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 6 This is a perspective view of the conveying component of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 7 This is a front view of the conveying component of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 8 This is a top view of the conveying component of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 9 for Figure 8 Cross-sectional view of section line AA in the middle; Figures 10-12These are all three-dimensional schematic diagrams of the built-in conveyor stage of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 13 This is a three-dimensional schematic diagram of the active wheel assembly of a non-destructive visual inspection device for liquid crystal displays proposed in this invention; Figure 14 This is a disassembly diagram of one end of the power roller shaft of a non-destructive visual inspection device for liquid crystal displays proposed in this invention.

[0018] The components include: 1. Cabinet; 2. Channel-type testing table; 3. Conveying assembly; 301. Side frame plate; 302. Base platform; 303. Notch section; 304. Motor; 305. Roller components; 306. First belt; 307. Inner support plate; 308. Guide roller assembly; 309. L-shaped side plate frame; 4. Built-in conveyor table; 401. First support component; 402. Second support component; 403. Driven wheel assembly; 404. Built-in belt. 405. Protective frame; 406. Adjustable support platform; 4061. Cross-shaped plate; 4062. Support cylinder; 4063. Mounting screw; 407. Suspension frame; 408. Hanger housing; 409. Guide wheel; 4010. Internal gear ring; 4011. Power roller shaft; 4012. Planetary gear; 4013. Gear sleeve; 4014. Support shaft; 4015. Tooth section; 4016. Planetary shaft; 5. Laser detection assembly. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] like Figures 1-14 As shown, this embodiment of the invention provides a non-destructive visual inspection device for liquid crystal displays, belonging to the field of optical equipment inspection and relating to the field of laser visual inspection technology. Specifically, it uses a laser inspection component 5 to perform non-destructive visual inspection on liquid crystal displays, which includes: a channel-type inspection stage 2, a conveying component 3, and a built-in conveying stage 4.

[0021] like Figure 1 , Figure 2As shown, the channel-type inspection station 2 has left and right transverse channels. Generally, an observation window (using laser protective glass) is designed on the front side of the channel-type inspection station 2 to facilitate direct observation of the interior of the channel-type inspection station 2. A laser detection component 5 is fixedly installed on the top inner side of the channel-type inspection station 2. The laser detection component 5 can be selected from: LK-H series (such as LK-H008) lasers and ZX2-L series laser sensors, and is used with the corresponding data processing system of the laser / laser sensor. After the above installation, an inspection station is formed on the inner side of the channel-type inspection station 2 and below the laser detection component 5. A conveyor component 3 is arranged along the length of the channel-type inspection station 2. The upper side of the conveyor belt of the conveyor component 3 is recessed downward to form a first area. An internal conveyor platform 4 is installed in the middle of the first area, corresponding to the upper side of the conveyor belt of the conveyor component 3. The internal conveyor platform 4 obtains power and achieves deceleration through the conveyor belt of the conveyor component 3. The internal conveyor platform 4 is located at the inspection station.

[0022] In this embodiment, both the conveying component 3 and the built-in conveying platform 4 are horizontally arranged conveyor belts, with both ends opened by rollers (tensioners can be designed if necessary). Thus, the conveyor belts corresponding to the conveying component 3 and the built-in conveying platform 4 each have an upper part and a lower part. The upper part is used to carry the movement of the workpiece, and the lower part is used for cyclical back-and-forth movement.

[0023] In this embodiment, a first region is formed by a downward indentation on the upper side of the conveyor belt of the conveyor assembly 3, and a built-in conveyor platform 4 is designed within the first region. The built-in conveyor platform 4 obtains power from the conveyor belt of the conveyor assembly 3 and achieves deceleration. The built-in conveyor platform 4 is located at the detection station. In use, the workpiece (LCD screen) is placed on the conveyor assembly 3 and conveyed at high speed into the built-in conveyor platform 4. The workpiece is smoothly conveyed on the built-in conveyor platform 4. The laser detection assembly 5 performs laser detection on the workpiece passing through the built-in conveyor platform 4, ensuring continuous and stable laser detection and effectively avoiding motion blur, thus ensuring accurate imaging. In this embodiment, the built-in conveyor platform 4 is driven by the conveyor assembly 3 to reduce its speed. The running speed of the built-in conveyor platform 4 is slower than that of the conveyor assembly 3, and the built-in conveyor platform 4 moves at the same frequency as the conveyor assembly 3, which can achieve efficient, stable, and continuous carrying of the workpiece through the detection station, realizing highly stable laser detection.

[0024] like Figure 2 As shown, the channel-type testing platform 2 is installed on the cabinet 1, and the two ends of the conveying component 3 extend out of the channel-type testing platform 2, and the extended parts are also fixedly installed on the cabinet 1; the position of the channel-type testing platform 2 and the conveying component 3 is raised based on the cabinet 1 to facilitate the arrangement of the equipment.

[0025] In one embodiment, the conveying assembly 3 includes: a frame, rollers 305, guide rollers 308, and a first belt 306.

[0026] The frame includes two sets of parallel, spaced-apart side panels 301. The area between the two sets of side panels 301 is used to arrange roller components 305, guide roller groups 308, and a first belt 306. The bottoms of the two sets of side panels 301 are fixedly connected by a base platform 302. The base platform 302 is longitudinally arranged and is generally located at each end of the two sets of side panels 301. Two sets of roller components 305 are provided and are rotatably installed at both ends of the inner side of the frame. One of the roller components 305 is an active roller, driven by a motor 304. The machine 304 is equipped with either a servo motor or a speed-regulating motor. The motor 304 is fixedly installed on the outside of the side frame plate 301. The output end of the motor 304 is connected to the roller component 305 for transmission. The guide roller group 308 is rotatably installed on the inside of the frame. There are two sets of guide roller groups 308. The two sets of guide roller groups 308 correspond to the first area. The first belt 306 is installed on the two sets of roller components 305. The upper part of the first belt 306 passes around the two sets of guide roller groups 308, forming a downward indentation. This downward indentation is used to install the built-in conveyor table 4.

[0027] like Figures 6-9 As shown, when the motor 304 is powered on, it drives the active roller to rotate. The active roller drives the first belt 306 to run between the two sets of roller components 305. The upper part of the first belt 306 is used to transport the workpiece.

[0028] In one embodiment, the guide roller group 308 includes a first guide roller and a second guide roller distributed vertically. The second guide roller is located below the first guide roller and close to the first region. The first belt 306 passes above the first guide roller and below the second guide roller. Based on the cooperation of the first guide roller and the second guide roller, the first belt 306 is recessed downward. Furthermore, the guide roller group 308 is symmetrically arranged with two groups along the central axis of the first region. The first guide roller and the second guide roller in the other guide roller group 308 guide the first belt 306 back upward, thus forming a recessed region (the cross-section is approximately an isosceles trapezoid facing downward) between the two guide roller groups 308.

[0029] In one embodiment, to prevent severe deformation of the first belt 306 when the workpiece is on it, an inner support plate 307 is fixedly connected to the inner side of the frame and below the upper part of the first belt 306; such as Figure 9 As shown, the upper part of the first belt 306 forms a flat conveying area on both the left and right sides of the first region. The flat conveying areas on the left and right sides correspond to the feeding conveying and the discharging conveying. Generally, two inner support plates 307 are also provided, corresponding to the flat conveying areas on the left and right sides.

[0030] In one embodiment, such as Figures 10-14 As shown, the built-in conveyor 4 includes: a first support 401, a second support 402, a driven wheel set 403, a drive wheel set, and a built-in belt 404.

[0031] A notch 303 is provided on the side of the side panel 301 at a position corresponding to the first region. An L-shaped side panel frame 309 is fixedly connected to the side of the side panel 301 at a position corresponding to the side of the notch 303. The vertical part of the L-shaped side panel frame 309 is fixedly connected to the side of the side panel 301, and the horizontal part of the L-shaped side panel frame 309 is basically flush with the inner side of the notch 303. Two sets of side panel frames 301 correspond to two L-shaped side panel frames 309. The first support member 401 and the second support member 402 are both longitudinally installed between the two L-shaped side panel frames 309. The first support member 401 and the second support member 402 are located at both ends of the L-shaped side plate frame 309. The driven wheel set 403 is rotatably mounted on the second support member 402 via a shaft frame. The driving wheel set is mounted on the first support member 401. The driving wheel set and the first belt 306 are driven by friction contact. Based on the principle of friction, the driving wheel set obtains rotational power from the first belt 306. The driving wheel set can rotate when the conveying component 3 is running. The built-in belt 404 is installed between the driven wheel set 403 and the driving wheel set.

[0032] Based on the principle of friction, the drive pulley set obtains rotational power from the first belt 306. The rotation of the drive pulley set drives the built-in belt 404 to run between the driven pulley set 403 and the drive pulley set. Generally, the width of the built-in belt 404 is smaller than the width of the first belt 306 of the conveying component 3.

[0033] To prevent debris from entering the inside of the built-in belt 404, protective frames 405 are fixedly installed on the first support member 401 and the second support member 402, located on both sides of the built-in belt 404.

[0034] In one embodiment, the drive wheel assembly includes: a power roller shaft 4011, a support shaft 4014, a gear sleeve 4013, a boom housing 408, and an internal gear ring 4010.

[0035] A plurality of planetary shafts 4016 arranged in a ring array are fixedly connected to the end of the power roller shaft 4011. Each planetary shaft 4016 is rotatably mounted with a planetary gear 4012. In this structure, the end of the power roller shaft 4011 acts as a "planet carrier" to output rotation. The support shaft 4014 is fixedly mounted to the first support member 401 via a bracket. A spindle is fixedly provided at one end of the support shaft 4014. The spindle is rotatably engaged with an end hole opened at the center of the end of the power roller shaft 4011. The side of the spindle is provided with teeth 4015 that mesh with the planetary gear 4012. The teeth 4015 serve as the central sun gear and are integrally fixed to the support shaft 4014. A sleeve tooth 4013 is rotatably mounted at the end of the power roller shaft 4011, and the inner side of the sleeve tooth 4013 meshes with the planetary gear 4012. 012 meshing, and the outer side of the sleeve tooth 4013 is provided with a semi-circular concave tooth. The boom housing 408 is installed above the sleeve tooth 4013 through the suspension bracket 407. The suspension bracket 407 is fixedly installed with the first support member 401. The boom housing 408 is an arc-shaped cover, and guide wheel members 409 are rotatably installed at both ends. The two sets of guide wheel members 409 restrict the internal gear ring 4010 to ensure the stability of the internal gear ring 4010 during rotation. The internal gear ring 4010 is located on the inner side of the boom housing 408, and the outer side of the internal gear ring 4010 contacts the guide wheel member 409. The internal gear ring 4010 is sleeved on the outer side of the sleeve tooth 4013, so that the inner side of the internal gear ring 4010 meshes with the bottom of the sleeve tooth 4013. The upper side of the first belt 306 is in frictional contact with the bottom outer side of the internal gear ring 4010.

[0036] During operation, the first belt 306 runs at high speed, contacting the outer bottom of the inner gear ring 4010. Based on friction, the inner gear ring 4010 is driven to rotate. The inner side of the inner gear ring 4010 meshes with the bottom of the sleeve tooth 4013, which is the first reduction transmission structure, driving the sleeve tooth 4013 to rotate. The sleeve tooth 4013, planetary gear 4012, and tooth 4015 constitute a planetary gear system. In this system, the tooth 4015 located in the center is fixed as the central sun gear, the sleeve tooth 4013 is the input, and the end of the power roller shaft 4011 is the output rotation of the "planet carrier", forming the second reduction transmission structure (the transmission direction is opposite). This can drive the power roller shaft 4011 to rotate at low speed, so that the built-in belt 404 runs smoothly between the driven pulley set 403 and the driving pulley set.

[0037] In one embodiment, in order to ensure that the upper part of the first belt 306 can be stably contacted with the internal gear ring 4010, an adjustable support 406 is also designed. The adjustable support 406 is installed on the first support member 401 and the second support member 402, and is used to push upward against the upper part of the first belt 306 so that the upper part of the first belt 306 is in close contact with the internal gear ring 4010 of the built-in belt 404.

[0038] Specifically, the adjustable support platform 406 includes: a cross-shaped plate 4061, a support cylinder 4062, and mounting screws 4063; the cross-shaped plate 4061 is fixedly installed with the first support 401 and the second support 402, and the bottom of the support cylinder 4062 and near both ends are fixedly connected with mounting screws 4063. The mounting screws 4063 are fixedly connected to the cross-shaped plate 4061 through a double nut structure, and the two nuts in the double nut structure are located on the upper and lower sides of the cross-shaped plate 4061, respectively.

[0039] In actual use, the user adjusts the two nuts in the double nut structure to adjust the installation position of the mounting screw 4063 and the cross-shaped plate 4061, thereby adjusting the height of the support cylinder 4062. The top of the support cylinder 4062 abuts against the lower part of the upper side of the first belt 306, ensuring that the upper part of the upper side of the first belt 306 is in close contact with the internal gear ring 4010.

[0040] In one embodiment, cover plates are fixedly installed at both ends of the boom housing 408. The cover plates are used to cover both ends of the boom housing 408 to prevent debris from entering the inner side of the internal gear ring 4010.

[0041] In one embodiment, both ends of the built-in conveyor platform 4 are equipped with unpowered wheels. The unpowered wheels can be installed on the side frame plate 301 of the conveying assembly 3. During actual operation, the workpiece is conveyed to the right side by the conveying assembly 3. The left end of the workpiece contacts the unpowered wheel first. The unpowered wheel is driven to rotate by the movement of the workpiece. When the right end of the workpiece is about to leave the conveying assembly 3, the left end of the workpiece enters the built-in conveyor platform 4. At this time, the unpowered wheel mainly bears the weight of the workpiece. The built-in conveyor platform 4 drives the left end of the workpiece to continue moving to the left. When the workpiece leaves the built-in conveyor platform 4, the left end of the workpiece contacts the unpowered wheel first. The unpowered wheel is driven to rotate by the movement of the workpiece. When the right end of the workpiece is about to leave the built-in conveyor platform 4, the left end of the workpiece enters the conveying assembly 3. At this time, the unpowered wheel mainly bears the weight of the workpiece. The conveying assembly 3 drives the left end of the workpiece to continue moving. Through the design of the unpowered wheels, it is possible to ensure that the workpiece is relatively stable during the handover process between the conveying assembly 3 and the built-in conveyor platform 4.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-destructive visual inspection device for liquid crystal displays, comprising: A channel-type inspection station (2), wherein a laser inspection component (5) is fixedly installed on the top inner side of the channel-type inspection station (2), and an inspection station is formed on the inner side of the channel-type inspection station (2) and below the laser inspection component (5), characterized in that it further includes: A conveying assembly (3) is arranged along the length of the channel-type testing station (2), and the upper side of the conveyor belt of the conveying assembly (3) is recessed downward to form a first area; The first region has an internal conveyor platform (4) installed on the upper side of its conveyor belt, which corresponds to the upper side of the conveyor belt of the conveyor assembly (3). The internal conveyor platform (4) obtains power through the conveyor belt of the conveyor assembly (3) and achieves deceleration. The built-in conveyor (4) is located at the inspection station.

2. The non-destructive visual inspection device for liquid crystal displays according to claim 1, characterized in that, The conveying assembly (3) includes: The frame includes two sets of parallel and spaced side frame panels (301), the bottoms of which are fixedly connected by a base (302). Roller component (305) is provided in two sets, which are rotatably installed at both ends of the inner side of the frame; and one of the roller components (305) is an active roller, which is driven by a motor (304); The guide roller group (308) is rotatably installed on the inner side of the frame, and there are two groups of guide roller groups (308), with the two groups of guide roller groups (308) corresponding to the first area; The first belt (306) is mounted on two sets of rollers (305), and the upper part of the first belt (306) passes around the two sets of guide rollers (308) to form a downward indentation.

3. The non-destructive visual inspection device for liquid crystal displays according to claim 2, characterized in that: The guide roller group (308) includes a first guide roller and a second guide roller distributed vertically, with the second guide roller located below the first guide roller and close to the first region; The first belt (306) passes above the first guide roller and below the second guide roller.

4. The non-destructive visual inspection device for liquid crystal displays according to claim 2, characterized in that: An inner support plate (307) is fixedly connected to the inner side of the frame and below the upper part of the first belt (306).

5. The non-destructive visual inspection device for a liquid crystal display screen according to claim 2, characterized in that, The built-in conveyor (4) includes: First support member (401), second support member (402), the side of the side frame plate (301) and the position corresponding to the first area are provided with a notch (303), the side of the side frame plate (301) and the position corresponding to the side of the notch (303) are fixedly connected with an L-shaped side plate frame (309), the two sets of side frame plates (301) correspond to two L-shaped side plate frames (309), the first support member (401) and the second support member (402) are both longitudinally installed between the two L-shaped side plate frames (309), and the first support member (401) and the second support member (402) are distributed at both ends of the L-shaped side plate frame (309); Driven wheel assembly (403), which is rotatably mounted on the second support member (402) via a shaft bracket; The active pulley assembly is mounted on the first support member (401) and is driven by friction contact with the first belt (306); An internal belt (404) is installed between the driven pulley set (403) and the driving pulley set.

6. The non-destructive visual inspection device for liquid crystal displays according to claim 5, characterized in that, The drive wheel assembly includes: A power roller shaft (4011) is fixedly connected to the end of which are several planetary shafts (4016) arranged in a ring array. Each planetary shaft (4016) is rotatably mounted with a planetary gear (4012). Support shaft (4014), the support shaft (4014) is fixedly installed with the first support member (401) through a bracket, a spindle is fixedly provided at one end of the support shaft (4014), the spindle is rotatably engaged with the end hole opened at the center of the end of the power roller shaft (4011), and the side of the spindle is provided with teeth (4015) that mesh with the planetary gear (4012). A sleeve tooth (4013) is rotatably mounted on the end of a power roller shaft (4011), and the inner side of the sleeve tooth (4013) meshes with a planetary gear (4012), and the outer side of the sleeve tooth (4013) is provided with a semi-circular concave tooth opening. The boom housing (408) is mounted above the sleeve tooth (4013) via a suspension bracket (407). The suspension bracket (407) is fixedly installed with the first support member (401). The boom housing (408) is an arc-shaped cover, and guide wheels (409) are rotatably installed at both ends. The internal gear ring (4010) is located inside the boom housing (408), and the outer side of the internal gear ring (4010) contacts the guide wheel (409). The internal gear ring (4010) is sleeved on the outer side of the sleeve tooth (4013), so that the inner side of the internal gear ring (4010) meshes with the bottom of the sleeve tooth (4013). The upper side of the first belt (306) is in frictional contact with the outer bottom of the internal gear ring (4010).

7. The non-destructive visual inspection device for a liquid crystal display screen according to claim 6, characterized in that, Also includes: An adjustable support (406) is installed on the first support (401) and the second support (402) to abut against the upper part of the first belt (306) so that the upper part of the first belt (306) is in close contact with the inner tooth ring (4010) of the built-in belt (404).

8. The non-destructive visual inspection device for a liquid crystal display screen according to claim 7, characterized in that, The adjustable support platform (406) includes: A cross-shaped plate (4061) is fixedly installed with a first support member (401) and a second support member (402); The support cylinder (4062) is fixedly connected to the bottom and near both ends of the support cylinder (4062) with mounting screws (4063), and the mounting screws (4063) are fixedly connected to the cross-shaped plate (4061) by a double nut structure.

9. The non-destructive visual inspection device for a liquid crystal display screen according to claim 6, characterized in that: Both ends of the boom housing (408) are fixedly installed with cover plates.

10. A non-destructive visual inspection device for a liquid crystal display screen according to claim 6, characterized in that: Both ends of the built-in conveyor platform (4) are equipped with unpowered wheels.

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