A display screen defect optical detection device

Abstract

The application belongs to the technical field of optical detection, and particularly relates to a display screen defect optical detection device, which comprises a ring conveyor, a stand, an optical probe, a moving assembly, a rack, a winding drum, an unwinding drum, a marking belt and a marking patch. When a defect is detected on the display screen, the moving assembly drives the marking assembly to move to the defect position of the display screen, the winding drum inside the rack rotates, the used marking belt is wound to the outer ring of the winding drum, the unwinding drum is driven to rotate, the unused marking belt is released from the outer ring of the unwinding drum, and the marking patch on the outer side of the marking belt moves to the bottom of the rack. The moving assembly drives the rack to descend in height, so that one marking patch at the bottom of the rack is attached to the defect position of the display screen for marking. The defect position of the display screen is accurately marked, so that the detection work of subsequent re-inspection personnel is facilitated, and the misjudgment and missed detection of the display screen defect are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of optical detection, and particularly relates to a display screen defect optical detection device. BACKGROUND

[0002] A display screen is a display tool for displaying certain electronic files on a screen through specific transmission equipment, and common display screens include cathode ray tube display screens, plasma display screens and liquid crystal display screens; the display screens need to be detected after production to remove defective products.

[0003] After production, the display screens are detected mainly by using an optical detection device to detect whether the liquid crystal display screen has defects; the liquid crystal display screen to be detected is conveyed by a conveying device and passes through a detection area of the optical detection device; the optical detection device performs optical detection on the display screen; when it is detected that the display screen has defects, the display screen with defects is separated from display screens with qualified quality.

[0004] The defective display screens separated by the optical detection need to be manually rechecked by subsequent workers; the optical detection device does not mark the defect position of the display screen; when the defect on the display screen is a small bad point, a dark point or a bright point, and multiple defects exist, the worker needs to be extremely careful to find the defect during manual rechecking, and the defect is easily misjudged or missed.

[0005] Therefore, the application provides a display screen defect optical detection device. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem in the background art.

[0007] The technical scheme adopted by the application to solve the technical problem is that the display screen defect optical detection device comprises a ring conveyor; the display screen is conveyed on the ring conveyor; a stand is arranged at the middle part of the ring conveyor; a cross beam is fixed to the top of the stand, and the cross beam of the stand is located at the top of the ring conveyor; a plurality of optical probes are arranged on both sides of the cross beam of the stand; a moving assembly is arranged at the bottom of the cross beam of the stand; a marking assembly is arranged at the bottom of the moving assembly; the marking assembly comprises a rack arranged at the bottom of the moving assembly; a winding drum and an unwinding drum are arranged in the rack from top to bottom; a marking tape is wound on the winding drum and the unwinding drum; the marking tape slides around the bottom of the rack; and marking patches are uniformly attached to the outer side surface of the marking tape.

[0008] Preferably, the middle part of the rack is rotatably connected with two rotating rods; the winding drum is sleeved on the outer ring of the rotating rod at the top; the unwinding drum is sleeved on the outer ring of the rotating rod at the bottom; the side of the rack away from the rotating rod is fixedly connected with a first motor; the first motor is fixedly connected with the rotating rod at the top.

[0009] Preferably, the bottom of the rack is provided with a trapezoidal block; the bottom surface of the trapezoidal block is a horizontal surface, and the width of the bottom surface of the trapezoidal block is greater than the diameter of the label patch; a plurality of springs are fixedly connected between the top surface of the trapezoidal block and the bottom surface of the rack; the label belt is in sliding contact with the bottom surface of the trapezoidal block; the top of the trapezoidal block is rotatably connected with rotating rollers on both sides; the label belt is in sliding contact with the rotating rollers.

[0010] Preferably, the outer side of the label belt is a smooth surface; the inner side of the label belt is uniformly provided with a plurality of grooves; the label patch is made of silica gel; the side of the label patch close to the label belt is coated with glue; the side of the label patch away from the label belt is provided with an adsorption groove.

[0011] Preferably, the moving assembly comprises a plurality of lifting hydraulic cylinders fixedly connected to the bottom surface of the cross beam of the stand; the bottom ends of the lifting hydraulic cylinders are fixedly connected with transverse sliding rails; the bottom surface of the automatic sliding block of the transverse sliding rail is fixedly connected with a longitudinal sliding rail; the bottom surface of the automatic sliding block of the longitudinal sliding rail is fixedly connected with the top surface of the rack.

[0012] Preferably, the top of the annular conveyor is uniformly provided with a plurality of supporting tables; each supporting table is fixedly connected with a pair of supports on both sides of the top surface; a plurality of conveying rollers are rotatably connected between each pair of supports; one end of the conveying roller away from the middle part of the supporting table is fixedly connected with a first synchronous wheel outside the outer ring; the outer ring of a plurality of first synchronous wheels is sleeved with a first synchronous belt; one of the conveying rollers close to the end of the support is fixedly connected with a second synchronous wheel outside the outer ring of the end away from the middle part of the supporting table; the bottom of both sides of the supporting table is fixedly connected with a second motor, and the outer ring of the rotating shaft of the second motor is also fixedly connected with a second synchronous wheel; the outer rings of two second synchronous wheels are sleeved with a second synchronous belt.

[0013] Preferably, the outer ring of the conveying roller is uniformly fixedly connected with a plurality of rubber rings.

[0014] Preferably, the side of the supporting table close to the stand is bolted with a baffle on both sides; the middle part of both sides of the supporting table is provided with a receiving groove; the inside of the receiving groove is fixedly connected with a horizontal pushing hydraulic cylinder; the side of the supporting table close to the stand is hingedly connected with a rotating plate on both sides of the bottom; the middle part of the rotating plate is provided with a sliding groove; the end of the horizontal pushing hydraulic cylinder away from the receiving groove is fixedly connected with a sliding block; the sliding block is slidingly arranged in the sliding groove; the side of the rotating plate close to the supporting table is uniformly fixedly connected with a plurality of rubber protrusions.

[0015] Preferably, a mounting groove is arranged in the middle of the top surface of the support table; a fixing seat is fixedly connected inside the mounting groove; an inner cavity is arranged in the fixing seat; a plurality of negative pressure grooves are uniformly arranged on the top surface of the fixing seat; air holes are arranged in communication between the inner cavity and the negative pressure grooves; an air pump is arranged at one end of the fixing seat; the air pump is in communication with the inner cavity; a frame-shaped rubber sealing strip is fixedly connected to the top surface of the fixing seat; and the rubber sealing strip is sleeved on the outer periphery of the plurality of negative pressure grooves.

[0016] Preferably, a support roller is rotatably arranged on each side of the bottom of the support table; the outer periphery of the support roller is in sliding contact with the top surface of the ring-shaped conveyor; and a pair of convex rings are bolted to the outer periphery of the support roller; the side wall of the convex ring is in sliding contact with the inner wall of the top surface of the ring-shaped conveyor.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The display screen defect optical detection device comprises a ring-shaped conveyor, a stand, an optical probe, a moving assembly, a rack, a winding drum, an unwinding drum, a marking tape and a marking patch; when a defect is detected on the display screen, the moving assembly drives the marking assembly to move to the defect position of the display screen, the winding drum inside the rack rotates, the used marking tape is wound to the outer ring of the winding drum, the unwinding drum is driven to rotate, the unused marking tape is released from the outer ring of the unwinding drum, and the marking patch on the outer side of the marking tape moves to the bottom of the rack; the moving assembly drives the rack to lower the height, so that one marking patch at the bottom of the rack is attached to the defect position of the display screen for marking; the defect position of the display screen is accurately marked, thereby facilitating the detection work of subsequent re-inspection personnel and reducing the misjudgment and missed detection of the display screen defect.

[0019] 2. The display screen defect optical detection device comprises a groove and an adsorption groove; the groove is arranged on the inner side of the marking tape, so that the adsorption groove of the marking patch and the inner side of the marking tape cannot form a sealed negative pressure environment, thereby avoiding the adsorption of the marking patch and the inner side of the marking tape, and then the marking patch is stably pasted on the outer side of the marking tape; the adsorption groove is arranged on the marking patch, so that when the marking patch is attached to the display screen, the adsorption groove on the marking patch is extruded, so that a sealed negative pressure environment is formed between the adsorption groove of the marking patch and the display screen; the marking patch is adsorbed on the display screen by using the negative pressure adsorption mode, which not only facilitates the staff to take down the marking patch, but also reduces the damage to the display screen. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a perspective view of the present application;

[0022] Figure 2 is a perspective view of the column in the present application;

[0023] Figure 3 is a perspective view of the rack in the present application;

[0024] Figure 4 is a structural view of the marking tape in the present application;

[0025] Figure 5 is a sectional view of the marking patch in the present application;

[0026] Figure 6 is a perspective view of the supporting table in the present application;

[0027] Figure 7 is an exploded view of the supporting table in the present application;

[0028] Figure 8 is a perspective view of the conveying roller in the present application;

[0029] Figure 9 is a perspective view of the fixing base in the present application;

[0030] Figure 10 is a sectional view of the fixing base in the present application;

[0031] Figure 11 is an exploded view of the rotating plate in the present application;

[0032] Figure 12 is a perspective view of the supporting roller in the present application;

[0033] In the figure: 1, ring conveyor; 3, column; 4, optical probe; 5, rack; 6, winding drum; 7, unwinding drum; 8, marking tape; 9, marking patch; 10, rotating rod; 11, No. 1 motor; 12, trapezoidal table block; 13, spring; 14, rotating roller; 15, groove; 16, adsorption groove; 17, lifting hydraulic cylinder; 18, transverse slide rail; 19, longitudinal slide rail; 20, supporting table; 21, support; 22, conveying roller; 23, No. 1 synchronous wheel; 24, No. 1 synchronous belt; 25, No. 2 synchronous wheel; 26, No. 2 motor; 27, No. 2 synchronous belt; 28, rubber ring; 29, baffle; 30, storage groove; 31, horizontal pushing hydraulic cylinder; 32, rotating plate; 33, slide groove; 34, sliding block; 35, mounting groove; 36, fixing base; 37, inner cavity; 38, negative pressure groove; 39, air hole; 40, air pump; 41, rubber sealing strip; 42, supporting roller; 43, convex ring. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0035] As Figures 1 to 4As shown in the figure, an optical inspection device for display screen defects according to an embodiment of the present invention includes a circular conveyor 1; a display screen is conveyed on the circular conveyor 1; a column 3 is provided in the middle of the circular conveyor 1; a crossbeam is fixed to the top of the column 3, and the crossbeam of the column 3 is located at the top of the circular conveyor 1; multiple optical probes 4 are provided on both sides of the crossbeam of the column 3; a moving component is provided at the bottom of the crossbeam of the column 3; a marking component is provided at the bottom of the moving component; the marking component includes a material rack 5 provided at the bottom of the moving component; a take-up drum 6 and an unwind drum 7 are arranged sequentially from top to bottom inside the material rack 5; a marking strip 8 is wound on the take-up drum 6 and the unwind drum 7; the marking strip 8 slides around the bottom of the material rack 5; a marking patch 9 is uniformly pasted on the middle of the outer side of the marking strip 8.

[0036] During operation, the produced display screens are placed on the circular conveyor 1, and the display screens are transported by the circular conveyor 1 to the bottom of the crossbeam of the column 3. The optical probe 4 on the column 3 takes pictures of the display screens for optical inspection.

[0037] When no defects are detected on the display screen, the circular conveyor 1 transports the display screen after inspection to the good product outlet of the circular conveyor 1 for unloading;

[0038] When a defect is detected on the display screen, the moving component drives the marking component to the defect location on the display screen. The take-up drum 6 inside the material rack 5 rotates, winding the used marking tape 8 onto the outer ring of the take-up drum 6. This drives the unwinding drum 7 to rotate, releasing the unused marking tape 8 from the outer ring of the unwinding drum 7, causing the marking patch 9 on the outer side of the marking tape 8 to move to the bottom of the material rack 5. The moving component then lowers the material rack 5, causing a marking patch 9 located at the bottom of the material rack 5 to adhere to the defect location on the display screen for marking. Afterward, the moving component drives the marking component to reset. Simultaneously, the take-up drum 6 winds up the used marking tape 8, and the unwinding drum 7 releases the unused marking tape 8, causing a new marking patch 9 on the outer side of the marking tape 8 to move to the bottom of the material rack 5. Finally, the circular conveyor 1 transports the display screen with the defect marking completed to the defective product outlet of the circular conveyor 1 for unloading.

[0039] By accurately marking the location of defects in the display screen, it is easier for subsequent inspection personnel to conduct tests, thus reducing the chances of false or missed detections of defects in the display screen.

[0040] like Figure 3 As shown, two rotating rods 10 are rotatably installed in the middle of the material rack 5; the take-up drum 6 is sleeved on the outer ring of the top rotating rod 10; the unwinding drum 7 is sleeved on the outer ring of the bottom rotating rod 10; a No. 1 motor 11 is fixedly connected to the side of the material rack 5 away from the rotating rod 10; the No. 1 motor 11 is fixedly connected to the top rotating rod 10.

[0041] During operation, motor 11 drives a rotating rod 10 located at the top of the material rack 5 to rotate, which in turn drives the take-up drum 6 to rotate, winding the used marking tape 8 onto the outer ring of the take-up drum 6. The movement of the marking tape 8 drives the unwinding drum 7 to rotate, releasing the unused marking tape 8 from the outer ring of the unwinding drum 7, so that the marking patch 9 on the outer side of the marking tape 8 moves to the bottom of the material rack 5; thus providing power for the movement of the marking tape 8.

[0042] like Figure 3 As shown, a trapezoidal platform 12 is provided at the bottom of the material rack 5; the bottom surface of the trapezoidal platform 12 is horizontal, and the width of the bottom surface of the trapezoidal platform 12 is greater than the diameter of the marking patch 9; multiple springs 13 are fixedly connected between the top surface of the trapezoidal platform 12 and the bottom surface of the material rack 5; the marking strip 8 is in sliding contact with the bottom surface of the trapezoidal platform 12; rotating rollers 14 are rotatably mounted on both sides of the top of the trapezoidal platform 12; the marking strip 8 is in sliding contact with the rotating rollers 14. Since the bottom of the trapezoidal platform 12 is blocked by the marking strip 8, the spring force of the spring 13 causes the trapezoidal platform 12 to tend to move downward away from the material rack 5. The marking strip 8 is tightened by the spring force of the spring 13. At the same time, due to the horizontal surface of the bottom of the trapezoidal platform 12, the marking strip 8 is in a flat state on the bottom surface of the trapezoidal platform 12, thereby making the marking patch 9 in a flat state, which improves the stability of the marking patch 9 and the display screen.

[0043] Meanwhile, when the trapezoidal platform 12 drives the marking strip 8 and marking patch 9 to contact the display screen, the spring 13 is compressed and buffered, thereby reducing the impact on the display screen and reducing the possibility of damage to the display screen.

[0044] By setting rotating rollers 14 on both sides of the trapezoidal platform 12, and having the rotating rollers 14 slidingly engage with the marking strip 8, the frictional resistance between the marking strip 8 and the trapezoidal platform 12 is reduced.

[0045] like Figures 4 to 5 As shown, the outer surface of the marking tape 8 is smooth; the inner surface of the marking tape 8 is evenly provided with multiple grooves 15; the marking patch 9 is made of silicone; the side of the marking patch 9 near the marking tape 8 is coated with glue; the side of the marking patch 9 away from the marking tape 8 is provided with an adsorption groove 16; when the unused marking tape 8 is wound around the outer ring of the unwinding spool 7, the adsorption groove 16 of the marking patch 9 on the outer surface of the marking tape 8 will contact the inner surface of the marking tape 8. By providing grooves 15 on the inner surface of the marking tape 8, a sealed negative pressure environment cannot be formed between the adsorption groove 16 of the marking patch 9 and the inner surface of the marking tape 8, thereby preventing the marking patch 9 from adsorbing onto the inner surface of the marking tape 8, and thus allowing the marking patch 9 to be stably adhered to the outer surface of the marking tape 8;

[0046] By opening the adsorption groove 16 on the marking patch 9, when the marking patch 9 is attached to the display screen, the adsorption groove 16 on the marking patch 9 is extruded, so that a sealed negative pressure environment is formed between the adsorption groove 16 on the marking patch 9 and the display screen. The marking patch 9 is adsorbed on the display screen by the negative pressure adsorption mode. Not only is it convenient for the staff to remove the marking patch 9, but also the damage to the display screen is reduced.

[0047] As shown in Figures 1 to 2 , the moving assembly comprises a plurality of lifting hydraulic cylinders 17 fixed to the bottom surface of the cross beam of the column 3; the bottom end of each lifting hydraulic cylinder 17 is fixed with a transverse sliding rail 18; the bottom surface of the automatic sliding block of the transverse sliding rail 18 is fixed with a longitudinal sliding rail 19; the bottom surface of the automatic sliding block of the longitudinal sliding rail 19 is fixed with the top surface of the rack 5; the lifting hydraulic cylinder 17 drives the transverse sliding rail 18 and the longitudinal sliding rail 19 to lift, and drives the marking assembly to lift; the automatic sliding block of the transverse sliding rail 18 drives the longitudinal sliding rail 19 to move horizontally, and drives the marking assembly to move horizontally; the automatic sliding block of the longitudinal sliding rail 19 drives the marking assembly to move longitudinally; so that the marking assembly can move to the defect position of the display screen for marking work.

[0048] As shown in Figure 1 , Figure 6 , Figure 7 and Figure 8 , the top of the ring conveyor 1 is uniformly provided with a plurality of supporting tables 20; each supporting table 20 is fixed with a pair of supports 21 on both sides of the top surface; a plurality of conveying rollers 22 are rotatably installed between each pair of supports 21; a first synchronous wheel 23 is fixed to the outer circle of one end of each conveying roller 22 away from the middle of the supporting table 20; a first synchronous belt 24 is sleeved around the outer circles of a plurality of first synchronous wheels 23; a second synchronous wheel 25 is fixed to the outer circle of one end of one conveying roller 22 away from the middle of the supporting table 20 near the end of the support 21; a second motor 26 is fixed to both sides of the bottom of the supporting table 20, and the outer circle of the rotating shaft of the second motor 26 is also fixed with a second synchronous wheel 25; the outer circles of two second synchronous wheels 25 are sleeved with a second synchronous belt 27.

[0049] When working, the produced display screen is placed on the top of the supporting table 20, and the plurality of conveying rollers 22 on both sides of the top of the supporting table 20 lift the display screen; when the display screen is discharged after detection, the second motor 26 drives the second synchronous wheel 25 to rotate, and through the transmission of the second synchronous belt 27, one conveying roller 22 is driven to rotate, and then through the transmission of the first synchronous wheel 23 and the first synchronous belt 24, a plurality of conveying rollers 22 are driven to rotate synchronously, and the plurality of conveying rollers 22 on both sides are driven to rotate, and the display screen is driven to move out from the top of the supporting table 20 for discharging; so as to realize the discharging work of the display screen.

[0050] As shown in Figure 8As shown in the figure, the outer ring of the conveying roller 22 is uniformly fixed with a plurality of rubber rings 28; by setting the rubber ring 28 on the outer ring of the conveying roller 22, not only the display screen is buffered, but also the slippage of the conveying roller 22 when conveying the display screen is reduced.

[0051] As shown in the figure, Figure 6 , Figure 7 and Figure 11 , the two sides of the one side of the support table 20 close to the column 3 are bolted with the baffle 29; the middle part of the two sides of the support table 20 is provided with the receiving groove 30; the inside of the receiving groove 30 is fixed with the flat push hydraulic cylinder 31; the bottom of the two sides of the one side of the support table 20 close to the column 3 is hinged with the rotating plate 32; the middle part of the rotating plate 32 is provided with the sliding groove 33; one end of the flat push hydraulic cylinder 31 away from the receiving groove 30 is fixed with the sliding block 34; the sliding block 34 is slidingly arranged in the inside of the sliding groove 33; the one side of the rotating plate 32 close to the support table 20 is uniformly fixed with a plurality of rubber protrusions;

[0052] When working, the produced display screen is placed on the top of the support table 20, so that the end surface of the display screen is in contact with the baffle 29; at the same time, the flat push hydraulic cylinders 31 on both sides are synchronously contracted, driving the sliding block 34 to slide in the sliding groove 33 of the rotating plate 32, driving the rotating plate 32 to rotate towards the support table 20, the rotating plate 32 pushing the display screen to move towards the middle part of the support table 20, so that the display is fixed in the middle part of the support table 20, thereby facilitating the subsequent detection and marking work of the display screen, and improving the accuracy of detection and marking.

[0053] As shown in the figure, Figure 6 , Figure 7 , Figure 9 and Figure 10 , the middle part of the top surface of the support table 20 is provided with the mounting groove 35; the inside of the mounting groove 35 is fixed with the fixing seat 36; the inside of the fixing seat 36 is provided with the inner cavity 37; the top surface of the fixing seat 36 is uniformly provided with a plurality of negative pressure grooves 38; the inner cavity 37 and the negative pressure grooves 38 are communicated through the air holes 39; one end of the fixing seat 36 is provided with the air pump 40; the air pump 40 is communicated with the inner cavity 37; the top surface of the fixing seat 36 is fixed with the frame-shaped rubber sealing strip 41; the rubber sealing strip 41 is sleeved on the outer periphery of the plurality of negative pressure grooves 38;

[0054] When working, after the display screen moves to the middle part of the support table 20, the bottom surface of the display screen is in contact with the rubber sealing strip 41 on the top surface of the fixing seat 36, at this time, the air pump 40 and the air in the inner cavity 37 are extracted, and then the air in the negative pressure grooves 38 is extracted through the communication of the air holes 39, so that the negative pressure is formed in the inside of the negative pressure grooves 38, and the display screen is adsorbed on the top of the fixing seat 36, thereby reducing the displacement and shaking of the display screen in the conveying process;

[0055] Through the rubber sealing strip 41 arranged, not only the sealing between the negative pressure groove 38 and the display screen is improved, but also the display screen is buffered.

[0056] As shown in Figure 7 and Figure 12 the bottom of the support table 20 is rotatably installed with a supporting roller 42 on both sides; the outer periphery of the supporting roller 42 is in sliding contact with the top surface of the ring conveyor 1; the outer periphery of the supporting roller 42 is bolted with a pair of convex rings 43; the side wall of the convex ring 43 is in sliding contact with the inner wall of the top surface of the ring conveyor 1; through the sliding contact of the supporting roller 42 with the top surface of the ring conveyor 1 and the sliding contact of the side wall of the convex ring 43 with the inner wall of the top surface of the ring conveyor 1, the stability of the support table 20 when moving on the top surface of the ring conveyor 1 is improved.

[0057] Working principle: the produced display screen is placed on the top of the support table 20, and the plurality of conveying rollers 22 on both sides of the top of the support table 20 lift the display screen; so that the end surface of the display screen is in contact with the baffle 29; at the same time, the two flat push hydraulic cylinders 31 are synchronously retracted, driving the sliding block 34 to slide in the sliding groove 33 of the rotating plate 32, driving the rotating plate 32 to rotate towards the support table 20, and the rotating plate 32 pushes the display screen to move towards the middle of the support table 20; the bottom surface of the display screen is in contact with the rubber sealing strip 41 on the top surface of the fixed seat 36, at this time, the air pump 40 and the air in the inner cavity 37 are extracted, and then communicated through the air hole 39, so that the air in the negative pressure groove 38 is extracted, so that a negative pressure is formed in the negative pressure groove 38, and the display screen is adsorbed on the top of the fixed seat 36;

[0058] The display screen is conveyed to the bottom of the cross beam of the stand column 3 by the ring conveyor 1, and the optical probe 4 on the stand column 3 performs optical detection on the image of the display screen;

[0059] When no defect is detected on the display screen, the ring conveyor 1 conveys the display screen after detection to the good product outlet of the ring conveyor 1 for discharging; the second motor 26 drives the second synchronous wheel 25 to rotate, and through the transmission of the second synchronous belt 27, drives one conveying roller 22 to rotate, and then through the transmission of the first synchronous wheel 23 and the first synchronous belt 24, the plurality of conveying rollers 22 are synchronously rotated, the plurality of conveying rollers 22 on both sides are rotated, and the display screen is moved out from the top of the support table 20 for discharging;

[0060] When the defect is detected on the display screen, the first motor 11 drives the rotating rod 10 at the top of the rack 5 to rotate, and drives the winding drum 6 to rotate, so as to wind the used marking tape 8 to the outer ring of the winding drum 6. Through the movement of the marking tape 8, the unwinding drum 7 is driven to rotate, and the unused marking tape 8 is released from the outer ring of the unwinding drum 7, so that the marking patch 9 on the outer side of the marking tape 8 moves to the bottom of the rack 5. Since the bottom of the trapezoidal block 12 is blocked by the marking tape 8, the trapezoidal block 12 has a tendency to move downward away from the rack 5 by the elastic force of the spring 13. The trapezoidal block 12 is pushed down by the elastic force of the spring 13 to tighten the marking tape 8. At the same time, due to the horizontal surface of the bottom surface of the trapezoidal block 12, the marking tape 8 at the bottom surface of the trapezoidal block 12 is in a flat state.

[0061] The marking assembly is driven to move up and down by the horizontal slide rail 18 and the vertical slide rail 19 driven by the lifting hydraulic cylinder 17. The marking assembly is driven to move horizontally by the automatic sliding block of the horizontal slide rail 18 driving the vertical slide rail 19 to move horizontally. The marking assembly is driven to move vertically by the automatic sliding block of the vertical slide rail 19. The lifting hydraulic cylinder 17 drives the rack 5 to descend to a certain height, so that a marking patch 9 at the bottom of the rack 5 is attached to the defect position of the display screen for marking. The suction groove 16 on the marking patch 9 is extruded, so that a sealed negative pressure environment is formed between the suction groove 16 of the marking patch 9 and the display screen. The marking patch 9 is attracted to the display screen by the negative pressure suction, which not only facilitates the removal of the marking patch 9 by the staff, but also reduces the damage to the display screen.

[0062] Finally, the display screen with the defect marking completed is conveyed to the defective product outlet of the ring conveyor 1 for discharging. Through accurate marking of the defect position of the display screen, the detection work of the subsequent re-inspection personnel is facilitated, and the false detection and missed detection of the display screen defect are reduced.

[0063] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An optical inspection device for display screen defects, comprising a circular conveyor (1); a display screen is conveyed on the circular conveyor (1); a column (3) is provided in the middle of the circular conveyor (1); a crossbeam is fixedly connected to the top of the column (3), and the crossbeam of the column (3) is located at the top of the circular conveyor (1); a plurality of optical probes (4) are provided on both sides of the crossbeam of the column (3); characterized in that: A movable component is provided at the bottom of the crossbeam of the column (3); a marking component is provided at the bottom of the movable component; the marking component includes a material rack (5) provided at the bottom of the movable component; a take-up drum (6) and an unwind drum (7) are arranged sequentially from top to bottom inside the material rack (5); a marking strip (8) is wound on the take-up drum (6) and the unwind drum (7); the marking strip (8) slides around the bottom of the material rack (5); a marking patch (9) is evenly pasted on the middle of the outer side of the marking strip (8); The bottom of the material rack (5) is provided with a trapezoidal platform (12); the bottom surface of the trapezoidal platform (12) is a horizontal plane, and the width of the bottom surface of the trapezoidal platform (12) is greater than the diameter of the marking patch (9); multiple springs (13) are fixed between the top surface of the trapezoidal platform (12) and the bottom surface of the material rack (5); the marking strip (8) is in sliding contact with the bottom surface of the trapezoidal platform (12); rotating rollers (14) are rotatably installed on both sides of the top of the trapezoidal platform (12); the marking strip (8) is in sliding contact with the rotating rollers (14); The outer surface of the marking strip (8) is smooth; the inner surface of the marking strip (8) is evenly provided with a plurality of grooves (15); the marking patch (9) is made of silicone; the side of the marking patch (9) close to the marking strip (8) is coated with glue; the side of the marking patch (9) away from the marking strip (8) is provided with an adsorption groove (16); The moving component includes multiple lifting hydraulic cylinders (17) fixed to the bottom surface of the crossbeam of the column (3); the bottom end of the multiple lifting hydraulic cylinders (17) is fixed to a transverse slide rail (18); the bottom surface of the automatic slider of the transverse slide rail (18) is fixed to a longitudinal slide rail (19); the bottom surface of the automatic slider of the longitudinal slide rail (19) is fixed to the top surface of the material rack (5).

2. The optical inspection device for display screen defects according to claim 1, characterized in that: Two rotating rods (10) are rotatably installed in the middle of the material rack (5); the take-up drum (6) is sleeved on the outer ring of the top rotating rod (10); the unwinding drum (7) is sleeved on the outer ring of the bottom rotating rod (10); a No. 1 motor (11) is fixedly connected to the side of the material rack (5) away from the rotating rod (10); the No. 1 motor (11) is fixedly connected to the top rotating rod (10).

3. The optical inspection device for display screen defects according to claim 1, characterized in that: The top of the annular conveyor (1) is uniformly provided with multiple support platforms (20); a pair of brackets (21) are fixedly connected to both sides of the top surface of each support platform (20); multiple conveying rollers (22) are rotatably installed between each pair of brackets (21); a first synchronous pulley (23) is fixedly connected to the outer ring of one end of the conveying roller (22) away from the middle of the support platform (20); a first synchronous belt (24) is fitted around the outer ring of the multiple first synchronous pulleys (23); a second synchronous pulley (25) is fixedly connected to the outer ring of one of the conveying rollers (22) near the end of the bracket (21) away from the middle of the support platform (20); a second motor (26) is fixedly connected to the bottom of both sides of the support platform (20), and a second synchronous pulley (25) is also fixedly connected to the outer ring of the shaft of the second motor (26); a second synchronous belt (27) is fitted around the outer ring of the two second synchronous pulleys (25).

4. The optical inspection device for display screen defects according to claim 3, characterized in that: Multiple rubber rings (28) are uniformly fixed to the outer ring of the conveying roller (22).

5. The optical inspection device for display screen defects according to claim 3, characterized in that: The support platform (20) has baffles (29) bolted to both sides of the side near the column (3); a storage groove (30) is opened in the middle of both sides of the support platform (20); a flat-push hydraulic cylinder (31) is fixedly connected inside the storage groove (30); a rotating plate (32) is hinged to the bottom of both sides of the support platform (20) near the column (3); a sliding groove (33) is opened in the middle of the rotating plate (32); a slider (34) is fixedly connected to the end of the flat-push hydraulic cylinder (31) away from the storage groove (30); the slider (34) is slidably arranged inside the sliding groove (33); a plurality of rubber protrusions are evenly fixed to the side of the rotating plate (32) near the support platform (20).

6. The optical inspection device for display screen defects according to claim 3, characterized in that: The support (20) has an installation groove (35) in the middle of its top surface; a fixing seat (36) is fixed inside the installation groove (35); an inner cavity (37) is opened inside the fixing seat (36); a plurality of negative pressure grooves (38) are evenly opened on the top surface of the fixing seat (36); an air hole (39) is opened between the inner cavity (37) and the negative pressure grooves (38) to communicate; an air pump (40) is provided at one end of the fixing seat (36); the air pump (40) is connected to the inner cavity (37); a frame-shaped rubber sealing strip (41) is fixed to the top surface of the fixing seat (36); the rubber sealing strip (41) is sleeved on the outer periphery of the plurality of negative pressure grooves (38).

7. The optical inspection device for display screen defects according to claim 3, characterized in that: Support rollers (42) are rotatably mounted on both sides of the bottom of the support platform (20); the outer periphery of the support rollers (42) slides in contact with the top surface of the annular conveyor (1); a pair of convex rings (43) are bolted to the outer periphery of the support rollers (42); the side wall of the convex rings (43) slides in contact with the inner wall of the top surface of the annular conveyor (1).

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