Detection equipment and method for liquid crystal display screen

Abstract

The invention discloses detection equipment and method for a liquid crystal display screen, and belongs to the technical field of display screen detection devices.The detection equipment for the liquid crystal display screen comprises two conveying belts used for conveying the display screen and a turnover mechanism arranged between the two conveying belts, a detection unit is arranged above one of the conveying belts, and the turnover mechanism is arranged above the other conveying belt; the turnover mechanism comprises two connecting blocks which are arranged between the two conveying belts in a sliding manner; the step of adsorbing the display screen is simplified through overturning of the suction plates, the suction plates can be in the state parallel to the conveying belt after being overturned, and therefore reciprocating motion on the horizontal plane and the vertical plane is not needed, the operation process is greatly simplified, and in addition, the two suction plates are arranged to be matched, so that the efficiency is improved. And the process of adsorbing the display screen and the process of releasing the display screen can be synchronously carried out, so that the operation continuity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen detection devices, and in particular to a detection device and method for a liquid crystal display screen. Background Art

[0002] As an output medium for image information, LCD screens provide people with many entertainment and work conveniences. Nowadays, LCD screens can be seen in almost all homes and workplaces. In the production process of LCD screens, detection devices are needed to detect the LCD screens.

[0003] Existing detection devices are generally installed on conveyor belts, so that the display screen can be photographed and detected by the detection device while the conveyor belt is transporting the display screen. Due to the layout of the factory, the display screen will be transported between multiple conveyor belts, and corresponding grabbing mechanisms will be arranged between adjacent conveyor belts to transport the display screen. The current grabbing mechanism needs to move on the horizontal and vertical planes to transport the display screen, making the overall operation steps more cumbersome.

[0004] Therefore, it is necessary to provide a liquid crystal display screen detection device and method to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a liquid crystal display screen detection device and method to solve the problem proposed in the above background technology that the existing gripping mechanism needs to move on the horizontal and vertical planes to transport the display screen, making the overall operation steps more cumbersome.

[0006] Based on the above ideas, the present invention provides the following technical solutions: a device and method for inspecting a liquid crystal display screen, comprising two conveyor belts for transporting the display screen and a flipping mechanism disposed between the two conveyor belts, wherein a detection unit is disposed above one of the conveyor belts, and the flipping mechanism comprises a connecting block slidably disposed between the two conveyor belts, the number of the connecting blocks being set to two, a suction plate being disposed above the connecting blocks, and a driving assembly for driving the suction plate to deflect being disposed on the connecting block, the driving assembly being driven by a top pressure unit below the conveyor belt; When the connecting block moves toward the middle position between the two conveyor belts, the driving assembly can be lifted up by the pressing unit, thereby driving the suction plate to deflect in the direction away from the conveyor belt. When the two connecting blocks are in contact between the two conveyor belts, the power assembly can drive the two connecting blocks to rotate, thereby swapping the positions of the two suction plates, so that the display screen adsorbed by the suction plate from one conveyor belt can face the other conveyor belt.

[0007] As a further solution of the present invention: the projection of the connecting block on the horizontal plane is a semicircle as a whole, and when the two connecting blocks are fitted together, the two connecting blocks can form a complete cylindrical structure.

[0008] As a further solution of the present invention: a vertical plate is fixedly provided on the top surface of the connecting block, a vertical rod is fixedly provided on the bottom surface of the suction plate, a rotating shaft is rotatably connected to the side of the vertical plate close to the vertical rod through a bearing, the rotating shaft passes through the vertical rod and is fixedly connected to the vertical rod, and a driven gear is fixedly sleeved on the outer side of the rotating shaft.

[0009] As a further solution of the present invention: the driving assembly includes a rack arranged at the connecting block and slidingly engaged with the connecting block, the rack is engaged with the driven gear, and a counterweight block is fixedly provided at the bottom end of the rack.

[0010] As a further solution of the present invention: the pressing unit includes a top plate, both sides of the top plate are inclined pressing parts, the two inclined pressing parts are arranged in an "eight" shape, and the top plate is located between the two pressing parts as a horizontal part.

[0011] As a further solution of the present invention: a semi-ring plate is sleeved on the outer side of the connecting block, a guide groove is opened on the inner wall of the semi-ring plate, and a guide bar is fixedly provided on the outer peripheral wall of the connecting block to slide with the guide groove. The cross-sections of the guide bar and the guide groove are both T-shaped, and a horizontal plate is integrally formed on the outer peripheral wall of the semi-ring plate near the end. A driving unit is provided on one side of the horizontal plate, and the telescopic end of the driving unit is fixedly connected to the horizontal plate.

[0012] As a further solution of the present invention: the power assembly includes a driving gear, which is arranged above the transverse plate, and a half gear ring meshing with the driving gear is fixedly installed on the outer peripheral wall of the connecting block.

[0013] As a further solution of the present invention: a motor is fixedly installed under the horizontal plate, and the output shaft of the motor passes through the horizontal plate and is fixedly connected to the driving gear.

[0014] As a further solution of the present invention: a ball is installed at the bottom end of the counterweight block.

[0015] A method for inspecting a liquid crystal display using the above-mentioned liquid crystal display inspection device comprises the following steps: placing the display on one of the conveyor belts and inspecting the surface of the display using a detection unit; driving a suction plate to flip so that the suction plate is above the display and adsorbing the display via the suction plate; and rotating a connecting block to swap the positions of the two suction plates so that the display adsorbed by the suction plate from one conveyor belt can face the other conveyor belt.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the steps of adsorbing the display screen are simplified by flipping the suction plate, and after the suction plate is flipped, it can be in a state parallel to the conveyor belt, so there is no need to move back and forth on the horizontal and vertical planes, which greatly simplifies the operation process. Moreover, by setting two sets of suction plates to cooperate with each other, the processes of adsorbing and releasing the display screen can be carried out simultaneously, thereby improving the continuity of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic structural diagram of the turning mechanism of the present invention; Figure 3 This is a schematic diagram of the structure of the connecting block, semi-annular plate and transverse plate of the present invention; Figure 4 This is a schematic diagram of the coordination between the rack and the driven gear of the present invention; Figure 5 It is a schematic diagram of the guide groove structure of the present invention; Figure 6 This invention Figure 2 A schematic diagram of the enlarged structure at point B; Figure 7 This invention Figure 1 A schematic diagram of the enlarged structure at point A; Figure 8 This is a schematic diagram of the connection block and rack of the present invention; Figure 9 Schematic diagram of the suction plate of the present invention being parallel to the conveyor belt; Figure 10 It is a schematic diagram showing that the suction plate of the present invention is perpendicular to the conveyor belt.

[0019] In the figure: 1. conveyor belt; 2. display screen; 3. detection unit; 4. drive unit; 5. bracket; 6. half ring plate; 601. horizontal plate; 602. guide groove; 7. suction cup; 8. suction plate; 801. vertical rod; 9. top plate; 901. horizontal part; 902. top pressure part; 10. half gear ring; 11. driving gear; 12. hose; 13. counterweight block; 14. guide block; 15. connecting block; 1501. guide strip; 1502. slot; 16. vertical plate; 17. driven gear; 18. rack; 1801. clip strip; 19. rotating shaft; 20. motor; 21. guide rod. DETAILED DESCRIPTION

[0020] like Figures 1-10As shown, a liquid crystal display screen detection device and method include two conveyor belts 1 for conveying the display screen 2 and a flipping mechanism arranged between the two conveyor belts 1. The two conveyor belts 1 can be arranged vertically or parallel, and the display screen 2 can be conveyed between the two conveyor belts 1 by the arranged flipping mechanism. A support frame for installing a detection unit 3 is provided on one side of one of the conveyor belts 1 (according to the detection requirements, the detection unit 3 can also be arranged at both conveyor belts 1 to detect different parameters of the display screen 2 respectively). The detection unit 3 is installed on the side of the support frame opposite to the conveyor belt 1. Specifically, the detection unit 3 is an existing display screen 2 detection device, which detects whether the display screen 2 has dark spots or cracks by photographing the display screen 2. Since it is a prior art, the specific structure of the detection unit 3 is not described here.

[0021] Combine Figure 1-Figure 4 As shown, the flip mechanism includes a connecting block 15 slidably arranged between the two conveyor belts 1. The projection of the connecting block 15 on the horizontal plane is a semicircular as a whole. The number of the connecting blocks 15 is set to two. When the two connecting blocks 15 are attached to each other, the two connecting blocks 15 can form a complete cylindrical structure. When the two connecting blocks 15 are attached to each other between the two conveyor belts 1, the power component can drive the two attached connecting blocks 15 to rotate 180°, thereby facilitating the transportation of the adsorbed display screen 2 between the conveyor belts 1. Furthermore, a suction plate 8 for adsorbing the display screen 2 is provided above the connecting block 15, and the suction plate 8 can be deflected relative to the connecting block 15. In actual use, a driving assembly for driving the suction plate 8 to deflect is provided on the connecting block 15, and the driving assembly is driven by a top pressure unit under the conveyor belt 1. Specifically, the top pressure unit is located between the two conveyor belts 1. In the process of the connecting block 15 moving toward the middle position of the two conveyor belts 1, the top pressure unit can lift the driving assembly, thereby driving the suction plate 8 to deflect in the direction away from the conveyor belt 1, which is conducive to sucking up the display screen 2 on the conveyor belt 1. When the two connecting blocks 15 are in contact between the two conveyor belts 1, the power assembly can drive the two connecting blocks 15 to rotate 180°, so that the positions of the two suction plates 8 can be swapped, so that the display screen 2 adsorbed from the conveyor belt 1 on one side can be placed on the other conveyor belt 1.

[0022] like Figure 2-Figure 3 、 Figure 6As shown, in order to install the suction plate 8, this solution has a vertical plate 16 fixedly provided on the top surface of the connecting block 15, and a vertical rod 801 fixedly provided on the bottom surface of the suction plate 8. The vertical plate 16 is rotatably connected to the side of the vertical rod 801 through a bearing. The rotating shaft 19 passes through the vertical rod 801 and is fixedly connected to the vertical rod 801. A driven gear 17 is fixedly sleeved on the outer side of the rotating shaft 19. When the two connecting blocks 15 are fitted together to form a cylinder, the above-mentioned driven gear 17, rotating shaft 19, vertical rod 801 and suction plate 8 and other structures are centrally symmetrically arranged about the axis of the cylinder.

[0023] The driving assembly includes a rack 18 disposed on the connecting block 15 and slidingly engaged with the connecting block 15. The rack 18 can slide in the vertical direction relative to the connecting block 15, and the rack 18 meshes with the driven gear 17. The meshing of the rack 18 and the driven gear 17 can drive the suction plate 8 to deflect. A counterweight 13 is fixedly provided at the bottom end of the rack 18 , and the gravity of the counterweight 13 can pull the rack 18 downward, thereby driving the suction plate 8 to deflect stably through the engagement of the rack 18 with the driven gear 17 .

[0024] The top pressing unit includes a top plate 9, referring to Figure 2 As shown, both sides of the top plate 9 are inclined pressing parts 902, and the two inclined pressing parts 902 are arranged in an "eight" shape. The top plate 9 is located between the two pressing parts 902 for a horizontal part 901. When the counterweight block 13 slides upward along the inclined pressing part 902, the rack 18 moves upward relative to the connecting block 15, thereby driving the suction plate 8 to deflect in the direction away from the conveyor belt 1 through the engagement of the rack 18 and the driven gear 17. When the two connecting blocks 15 are attached to the middle position of the two conveyor belts 1, the counterweight blocks 13 below the two connecting blocks 15 are It is on the horizontal part 901. At this time, it can drive the two connecting blocks 15 to rotate 180° to exchange the positions of the two suction plates 8. During this process, the display screen 2 adsorbed by the suction plate 8 on one conveyor belt 1 can face the other conveyor belt 1, which is conducive to releasing the adsorbed display screen 2 on the other conveyor belt 1. Through this structure, the process of adsorbing and releasing the display screen 2 can be completed synchronously, making the overall operation more coherent. Of course, a ball is installed at the bottom end of the counterweight block 13 to reduce the friction between the counterweight block 13 and the top plate 9.

[0025] like Figures 1-10 As shown, in order to drive the connection block 15 to move, this solution is provided with a semi-annular plate 6 on the outer side of the connection block 15, and a guide groove 602 is provided on the inner wall of the semi-annular plate 6. A guide strip 1501 that slides with the guide groove 602 is fixedly provided on the outer peripheral wall of the connection block 15. Figure 3 、 Figure 5As shown, the cross-sections of the guide strip 1501 and the guide groove 602 are both T-shaped, which is conducive to the stable cooperation between the connecting block 15 and the semi-ring plate 6.

[0026] The outer peripheral wall of the semi-annular plate 6 and the position close to the end thereof are integrally formed with a horizontal plate 601. Figure 1-Figure 4 、 Figure 7 As shown, a driving unit 4 is provided on one side of the transverse plate 601 . The driving unit 4 may be a cylinder or a hydraulic cylinder, and the telescopic end of the driving unit 4 is fixedly connected to the transverse plate 601 .

[0027] Furthermore, the above-mentioned power assembly includes a driving gear 11, which is arranged above the horizontal plate 601, and a half gear ring 10 meshing with the driving gear 11 is fixedly installed on the outer peripheral wall of the connecting block 15, and a motor 20 is fixedly installed below the horizontal plate 601. The motor 20 can be a servo motor, and the output shaft of the motor 20 passes through the horizontal plate 601 and is fixedly connected to the driving gear 11, and the output shaft of the motor 20 rotates in coordination with the horizontal plate 601. Through this structure, the two connecting blocks 15 that are in contact with each other can be driven to rotate.

[0028] During actual use, the display screen 2 to be inspected is placed on one of the conveyor belts 1, and the surface of the display screen 2 is inspected by the inspection unit 3 on one side of the conveyor belt 1. After the inspection is completed, the display screen 2 can be moved to the vicinity of the flipping mechanism. At this time, the driving unit 4 drives the cross plate 601, the semi-annular plate 6 and the connecting block 15 to approach the conveyor belt 1. During this process, the counterweight block 13 can move downward along the top pressure portion 902 on the top plate 9, and the rack 18 can move downward relative to the connecting block 15 under the traction of the counterweight block 13. The engagement of the rack 18 with the driven gear 17 can drive the suction plate 8 to deflect in the direction close to the conveyor belt 1. When the suction plate 8 flips 90°, the driving unit 4 stops operating. At this time, the suction plate 8 stays above the display screen 2. For details, refer to Figure 9 As shown, at this time, the display screen 2 can be adsorbed by the suction plate 8; After the suction plate 8 absorbs the display screen 2, the driving unit 4 drives the horizontal plate 601 and the semi-annular plate 6 and other structures to reset, so that the counterweight 13 can move upward along the top pressure part 902 to the horizontal part 901. During this process, the suction plate 8 will rotate to a vertical state in the direction away from the conveyor belt 1. For details, refer to Figure 2 As shown; When the two connecting blocks 15 are both at the horizontal portion 901 and fit together, the driving unit 4 stops moving and drives the driving gear 11 to rotate through the motor 20. The engagement of the driving gear 11 with the half gear ring 10 can drive the connecting block 15 to rotate 180°, thereby swapping the positions of the two suction plates 8 so that the display screen 2 adsorbed by the suction plate 8 from one of the conveyor belts 1 can face the other conveyor belt 1. After the driving gear 11 drives the connecting block 15 to rotate 180°, the motor 20 is stopped and the cross plate 601 is pulled close to the conveyor belt 1 again through the driving unit 4. During this process, the counterweight 13 will move downward along the top pressing portion 902 again, so that the suction plate 8 can deflect in the direction close to the conveyor belt 1. When the suction plate 8 flips 90° and is parallel to the conveyor belt 1, the display screen 2 is released through the suction plate 8, which is beneficial. When placing the display screen 2 on another conveyor belt 1, compared with the existing grabbing mechanism, this solution simplifies the step of adsorbing the display screen 2 by flipping the suction plate 8. After the suction plate 8 is flipped, it can be in a state parallel to the conveyor belt 1, so there is no need to move back and forth on the horizontal and vertical planes, which greatly simplifies the operation process. Moreover, by setting two sets of suction plates 8 to cooperate with each other, the process of adsorbing the display screen 2 and releasing the display screen 2 can be carried out synchronously, thereby improving the continuity of the operation. During specific operations, the operation of the drive unit 4 and the motor 20 can be controlled by programming to make it run automatically. Of course, the position of the semi-ring plate 6 can also be detected by setting corresponding infrared sensors and other structures to control the drive unit 4 or the motor 20. Since it is a mature technical means in the electrical field, it will not be elaborated here.

[0029] like Figure 1 As shown, brackets 5 are provided on both sides of the conveyor belt 1, so that the conveyor belt 1 can be installed between the two brackets 5. The above-mentioned driving unit 4 is fixedly provided on the bracket 5, and a guide rod 21 is provided between the two conveyor belts 1. The guide rod 21 is fixed between the two brackets 5, and the guide rod 21 passes through the cross plate 601 and slides with it, so as to install the cross plate 601, so that the driving unit 4 can drive the cross plate 601 to move stably.

[0030] Reference Figure 2 As shown, in actual use, a suction cup 7 is provided on one side of the suction plate 8, and a hose 12 is installed on the side of the suction plate 8 away from the suction cup 7. Specifically, the hose 12 is connected to the suction cup 7. When the suction plate 8 is flipped to a state parallel to the conveyor belt 1, the suction cup 7 can contact the display screen 2, which is conducive to adsorbing the display screen 2. This structure can simplify the steps of adsorbing the display screen 2. The end of the hose 12 away from the suction plate 8 is connected to an external pump body, and the display screen 2 can be adsorbed or released by controlling the pump body.

[0031] The top plate 9 and the bracket 5 are fixedly connected via a fixing rod, so as to install the top plate 9.

[0032] An escape groove for the hose 12 to pass through is formed on one side of the two connecting blocks 15 facing each other, and a guide block 14 is fixedly installed in the escape groove, so that the hose 12 passes through the guide block 14 and can slide relative to the guide block 14 .

[0033] Reference Figure 8 As shown, the connecting block 15 is provided with a through slot for the rack 18 to pass through, and a clamping slot 1502 is provided on the inner wall of the through slot, and a clamping strip 1801 that slides with the clamping slot 1502 is fixedly provided on one side of the rack 18. The cross-sections of the clamping slot 1502 and the clamping strip 1801 are both set to T-shaped, so that the rack 18 and the connecting block 15 can be stably matched.

Claims

1. A liquid crystal display screen inspection device, comprising two conveyor belts for conveying the display screen and a turning mechanism disposed between the two conveyor belts, wherein a detection unit is disposed above one of the conveyor belts, characterized in that: The turning mechanism includes a connecting block slidably arranged between the two conveyor belts, the number of the connecting blocks is set to two, a suction plate is arranged above the connecting block, and a driving component for driving the suction plate to deflect is arranged on the connecting block, and the driving component is driven by a top pressure unit under the conveyor belt; When the connecting block moves toward the middle position between the two conveyor belts, the driving assembly can be lifted up by the pressing unit, thereby driving the suction plate to deflect in the direction away from the conveyor belt. When the two connecting blocks are in contact between the two conveyor belts, the power assembly can drive the two connecting blocks to rotate, thereby swapping the positions of the two suction plates, so that the display screen adsorbed by the suction plate from one conveyor belt can face the other conveyor belt.

2. The liquid crystal display detection device according to claim 1, characterized in that: The projection of the connecting block on the horizontal plane is semicircular as a whole. When the two connecting blocks are fitted together, the two connecting blocks can form a complete cylindrical structure.

3. The liquid crystal display detection device according to claim 1, characterized in that: A vertical plate is fixedly provided on the top surface of the connecting block, a vertical rod is fixedly provided on the bottom surface of the suction plate, a rotating shaft is rotatably connected to the side of the vertical plate close to the vertical rod through a bearing, the rotating shaft passes through the vertical rod and is fixedly connected to the vertical rod, and a driven gear is fixedly sleeved on the outer side of the rotating shaft.

4. The liquid crystal display detection device according to claim 3, characterized in that: The driving assembly includes a rack that is arranged at the connecting block and slidably cooperates with the connecting block. The rack is engaged with the driven gear, and a counterweight block is fixedly arranged at the bottom end of the rack.

5. The liquid crystal display detection device according to claim 4, characterized in that: The top pressing unit includes a top plate, both sides of the top plate are inclined top pressing parts, the two inclined top pressing parts are arranged in an "eight" shape, and the top plate is located between the two top pressing parts as a horizontal part.

6. The liquid crystal display detection device according to claim 1, characterized in that: A semi-ring plate is sleeved on the outside of the connecting block, a guide groove is opened on the inner wall of the semi-ring plate, and a guide bar is fixedly provided on the outer peripheral wall of the connecting block to slide with the guide groove. The cross-sections of the guide bar and the guide groove are both T-shaped, and a horizontal plate is integrally formed on the outer peripheral wall of the semi-ring plate near the end. A driving unit is provided on one side of the horizontal plate, and the telescopic end of the driving unit is fixedly connected to the horizontal plate.

7. The liquid crystal display detection device according to claim 6, characterized in that: The power assembly includes a driving gear, which is arranged above the transverse plate. A half gear ring meshing with the driving gear is fixedly installed on the outer peripheral wall of the connecting block.

8. The liquid crystal display detection device according to claim 7, characterized in that: A motor is fixedly installed below the transverse plate, and an output shaft of the motor passes through the transverse plate and is fixedly connected to the driving gear.

9. The liquid crystal display screen detection device according to claim 4, characterized in that: A ball is installed at the bottom end of the counterweight.

10. A method for testing a liquid crystal display screen using the liquid crystal display screen testing device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: placing a display screen on one of the conveyor belts, and inspecting the surface of the display screen by a detection unit; driving the suction plate to flip so that the suction plate is above the display screen, and adsorbing the display screen by the suction plate; The positions of the two suction plates can be swapped by driving the connecting block to rotate, so that the display screen adsorbed by the suction plate from one conveyor belt can face the other conveyor belt.

Images