Display screen defect optical detection device

Abstract

The invention belongs to the technical field of optical detection, and particularly relates to a display screen defect optical detection device which comprises an annular conveyor, a stand column, an optical probe, a moving assembly, a material frame, 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 in the material frame rotates, the used marking belt is wound to the outer ring of the winding drum, the unwinding drum is driven to rotate, and the unused marking belt is released from the outer ring of the unwinding drum. The marking patches on the outer side face of the marking belt are moved to the bottom of the material frame; the moving assembly drives the material frame to descend, so that one marking patch located at the bottom of the material frame 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 subsequent detection work of reinspection personnel is facilitated, and the conditions of false detection and missing detection of the defects of the display screen are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of optical detection, and in particular to a display screen defect optical detection device. Background Art

[0002] A display screen is a tool that displays certain electronic files on the screen through a specific transmission device. Common ones include cathode ray tube displays, plasma displays and liquid crystal displays. Display screens need to be inspected after production to remove defective products.

[0003] After the display screen is produced, it is inspected. An optical inspection device is mainly used to detect whether the LCD screen has defects. The LCD screen to be inspected is conveyed by a conveying device through the inspection area of ​​the optical inspection device. The optical inspection device performs optical inspection on the screen. When defects are detected in the screen, the defective screen will be sorted out from the qualified screens.

[0004] Defective display screens that have been sorted out through optical inspection need to be manually re-inspected by subsequent staff; the optical inspection device does not mark the defective locations of the display screen. When the defects on the display screen are tiny bad pixels, dark spots, bright spots, etc., or when there are multiple defects, the staff must be extremely careful to manually re-inspect to find them, which can easily lead to false detection and missed detection of defects.

[0005] To this end, the present invention provides a display screen defect optical detection device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the optical detection device for display screen defects described in the present invention comprises a ring conveyor; the display screen is conveyed on the ring conveyor; a column is arranged in the middle of the ring conveyor; a crossbeam is fixedly connected to the top of the column, and the crossbeam of the column is located at the top of the ring conveyor; a plurality of optical probes are arranged on both sides of the crossbeam of the column; a moving component is arranged at the bottom of the crossbeam of the column; a marking component is arranged at the bottom of the moving component; the marking component comprises a material rack arranged at the bottom of the moving component; a winding drum and an unwinding drum are arranged in sequence from top to bottom inside the material rack; marking tapes are wound on the winding drum and the unwinding drum; the marking tape slides around the bottom of the material rack; a marking patch is evenly pasted on the middle of the outer side surface of the marking tape.

[0008] Preferably, two rotating rods are rotatably installed in the middle of the material rack; 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; a No. 1 motor is fixedly connected to the side of the material rack away from the rotating rod; the No. 1 motor is fixedly connected to the rotating rod at the top.

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

[0010] Preferably, the outer side surface of the marking tape is a smooth surface; the inner side surface of the marking tape is evenly provided with a plurality of grooves; the marking patch is made of silicone material; the side of the marking patch close to the marking tape is coated with glue; and the side of the marking patch away from the marking tape is provided with an adsorption groove.

[0011] Preferably, the moving assembly includes a plurality of lifting hydraulic cylinders fixedly connected to the bottom surface of the crossbeam of the column; the bottom ends of the plurality of lifting hydraulic cylinders are fixedly connected to a transverse slide rail; the bottom surface of the automatic slider of the transverse slide rail is fixedly connected to the longitudinal slide rail; the bottom surface of the automatic slider of the longitudinal slide rail is fixedly connected to the top surface of the material rack.

[0012] Preferably, a plurality of supports are evenly arranged on the top of the ring conveyor; a pair of brackets are fixedly connected on both sides of the top surface of the support; a plurality of conveying rollers are rotatably installed between each pair of the brackets; a No. 1 synchronous wheel is fixedly connected to the outer ring of one end of the conveying roller away from the middle of the support; a No. 1 synchronous belt is provided on the outer ring of the plurality of No. 1 synchronous wheels; a No. 2 synchronous wheel is fixedly connected to the outer ring of one end of the conveying roller away from the middle of the support near the end of the bracket; a No. 2 motor is fixedly connected to the bottom of both sides of the support, and a No. 2 synchronous wheel is also fixedly connected to the outer ring of the rotating shaft of the No. 2 motor; and a No. 2 synchronous belt is provided on the outer ring of the two No. 2 synchronous wheels.

[0013] Preferably, a plurality of rubber rings are evenly fixed to the outer ring of the conveying roller.

[0014] Preferably, baffles are bolted on both sides of the side of the support close to the column; storage grooves are opened in the middle of both sides of the support; push hydraulic cylinders are fixedly connected inside the storage grooves; turning plates are hinged at the bottom of both sides of the side of the support close to the column; a sliding groove is opened in the middle of the turning plate; a sliding block is fixedly connected to the end of the push hydraulic cylinder away from the storage groove; the sliding block is slidably arranged inside the sliding groove; a plurality of rubber convex strips are evenly fixedly connected to the side of the turning plate close to the support.

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

[0016] Preferably, support rollers are rotatably installed on both sides of the bottom of the support platform; the outer periphery of the support rollers is in sliding contact with the top surface of the ring conveyor; a pair of convex rings are bolted to the outer periphery of the support rollers; and the side walls of the convex rings are in sliding contact with the inner wall of the top surface of the ring conveyor.

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

[0018] 1. The optical detection device for display screen defects described in the present invention comprises a ring conveyor, a column, an optical probe, a moving component, a material 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 component drives the marking component to move to the defective position of the display screen, the winding drum inside the material rack rotates, and the used marking tape is rolled onto the outer ring of the winding drum, which drives the unwinding drum to rotate and releases the unused marking tape from the outer ring of the unwinding drum, so that the marking patch on the outer side of the marking tape moves to the bottom of the material rack; the moving component drives the material rack to descend in height, so that a marking patch located at the bottom of the material rack is attached to the defective position of the display screen for marking; by accurately marking the defective position of the display screen, the subsequent inspection work of the re-inspection personnel is facilitated, thereby reducing the situation of misdetection and missed detection of display screen defects.

[0019] 2. The optical detection device for display screen defects described in the present invention comprises a groove and an adsorption groove; by providing a groove on the inner side surface of the marking tape, a sealed negative pressure environment cannot be formed between the adsorption groove of the marking patch and the inner side surface of the marking tape, thereby avoiding the attraction between the marking patch and the inner side surface of the marking tape, and then the marking patch is stably adhered to the outer side surface of the marking tape; by providing an adsorption groove on the marking patch, when the marking patch is attached to the display screen, the adsorption groove on the marking patch is squeezed, so that a sealed negative pressure environment is formed between the adsorption groove of the marking patch and the display screen, and the marking patch is attracted to the display screen by negative pressure attraction, which not only makes it convenient for the staff to remove the marking patch, but also reduces the damage to the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 is a three-dimensional diagram of a column in the present invention;

[0023] Figure 3 It is a three-dimensional diagram of the material rack in the present invention;

[0024] Figure 4 It is a structural diagram of the marking belt in the present invention;

[0025] Figure 5 is a cross-sectional view of the marking patch of the present invention;

[0026] Figure 6 is a three-dimensional diagram of a support platform in the present invention;

[0027] Figure 7 is an exploded view of the support platform in the present invention;

[0028] Figure 8 is a three-dimensional diagram of the conveying roller in the present invention;

[0029] Fig. 9 It is a three-dimensional diagram of the fixing seat in the present invention;

[0030] Fig.10 is a cross-sectional view of the fixing seat in the present invention;

[0031] Fig.11 is an exploded view of the transfer plate of the present invention;

[0032] Fig.12 is a three-dimensional diagram of the support roller in the present invention;

[0033] In the figure: 1, circular conveyor; 3, column; 4, optical probe; 5, material rack; 6, take-up drum; 7, unwinding drum; 8, marking tape; 9, marking patch; 10, rotating rod; 11, No. 1 motor; 12, trapezoidal block; 13, spring; 14, rotating roller; 15, groove; 16, adsorption groove; 17, lifting hydraulic cylinder; 18, horizontal slide rail; 19, longitudinal slide rail; 20, support platform; 21, bracket; 22, conveyor roller; 23, No. 1 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. Push hydraulic cylinder; 32. Turntable; 33. Slide groove; 34. Sliding block; 35. Installation groove; 36. Fixed seat; 37. Inner cavity; 38. Negative pressure groove; 39. Air hole; 40. Air pump; 41. Rubber sealing strip; 42. Support roller; 43. Convex ring. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] like Figures 1 to 4As shown, an optical detection device for display screen defects described in an embodiment of the present invention comprises a circular conveyor 1; a display screen is conveyed on the circular conveyor 1; a column 3 is arranged 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 arranged on both sides of the crossbeam of the column 3; a moving component is arranged at the bottom of the crossbeam of the column 3; a marking component is arranged at the bottom of the moving component; the marking component comprises a material rack 5 arranged at the bottom of the moving component; a winding drum 6 and an unwinding drum 7 are arranged in sequence from top to bottom inside the material rack 5; a marking tape 8 is wound on the winding drum 6 and the unwinding drum 7; the marking tape 8 slides around the bottom of the material rack 5; a marking patch 9 is evenly pasted on the middle of the outer side surface of the marking tape 8;

[0036] During operation, the produced display screen is placed on the circular conveyor 1, and the display screen is transported by the circular conveyor 1 to the bottom of the crossbeam of the column 3, and the optical probe 4 on the column 3 takes an image of the display screen for optical inspection;

[0037] When no defects are detected on the display screen, the circular conveyor 1 conveys the display screen after the 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 move to the defective position of the display screen, and the winding drum 6 inside the material rack 5 rotates to roll the used marking tape 8 onto the outer ring of the winding drum 6, driving 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; the moving component drives the material rack 5 to descend in height, so that a marking patch 9 located at the bottom of the material rack 5 is attached to the defective position of the display screen for marking; thereafter, the moving component drives the marking component to reset, and at the same time, the winding drum 6 winds up the used marking tape 8, and the unwinding drum 7 releases the unused marking tape 8, so that the new marking patch 9 on the outer side of the marking tape 8 moves to the bottom of the material rack 5; finally, the circular conveyor 1 conveys the display screen after the defect marking is completed to the defective product outlet of the circular conveyor 1 for unloading;

[0039] By accurately marking the defective positions of the display screen, it is easier for subsequent re-inspection personnel to inspect the screen, thus reducing the possibility of false detection and missed detection of display screen defects.

[0040] like Figure 3 As shown, two rotating rods 10 are rotatably installed in the middle of the material rack 5; the winding drum 6 is sleeved on the outer ring of the rotating rod 10 at the top; the unwinding drum 7 is sleeved on the outer ring of the rotating rod 10 at the bottom; 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 rotating rod 10 at the top;

[0041] During operation, the No. 1 motor 11 drives a rotating rod 10 located at the top of the material rack 5 to rotate, which drives the winding drum 6 to rotate, and rolls the used marking tape 8 onto 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 material rack 5, thereby providing power for the movement of the marking tape 8.

[0042] like Figure 3 As shown, a trapezoidal block 12 is provided at the bottom of the material rack 5; the bottom surface of the trapezoidal block 12 is a horizontal plane, and the bottom surface width of the trapezoidal block 12 is greater than the diameter of the marking patch 9; a plurality of springs 13 are fixedly connected between the top surface of the trapezoidal block 12 and the bottom surface of the material rack 5; the marking belt 8 is in sliding contact with the bottom surface of the trapezoidal block 12; rollers 14 are rotatably installed on both sides of the top of the trapezoidal block 12; the marking belt 8 is in sliding contact with the rollers 14 ; Since the bottom of the trapezoidal block 12 is blocked by the marking tape 8, the elastic force of the spring 13 makes the trapezoidal block 12 tend to move downward away from the material rack 5, and the trapezoidal block 12 is pushed 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 is located on the bottom surface of the trapezoidal block 12 in a flat state, so that the marking patch 9 is in a flat state, thereby improving the stability of the marking patch 9 and the display screen.

[0043] At the same time, when the trapezoidal block 12 drives the marking tape 8 and the marking patch 9 to contact the display screen, the spring 13 performs compression buffering, thereby reducing the impact force on the display screen and reducing the damage to the display screen;

[0044] By arranging rollers 14 on both sides of the trapezoidal block 12 , the rollers 14 are slidably matched with the marking tape 8 , thereby reducing the friction resistance between the marking tape 8 and the trapezoidal block 12 .

[0045] like Figures 4 to 5 As shown, the outer side surface of the marking tape 8 is a smooth surface; a plurality of grooves 15 are evenly provided on the inner side surface of the marking tape 8; the marking patch 9 is made of silicone material; the side of the marking patch 9 close to 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 on the outer ring of the unwinding drum 7, one side of the adsorption groove 16 of the marking patch 9 on the outer side surface of the marking tape 8 will contact the inner side surface of the marking tape 8, and by providing the groove 15 on the inner side 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 side surface of the marking tape 8, thereby avoiding the attraction of the marking patch 9 with the inner side surface of the marking tape 8, and then the marking patch 9 will be stably adhered to the outer side surface of the marking tape 8;

[0046] By opening an 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 squeezed, so that a sealed negative pressure environment is formed between the adsorption groove 16 of the marking patch 9 and the display screen. The marking patch 9 is adsorbed on the display screen by negative pressure suction, which not only makes it convenient for the staff to remove the marking patch 9, but also reduces the damage to the display screen.

[0047] like Figure 1 to Figure 2 As shown, the moving component includes a plurality of lifting hydraulic cylinders 17 fixedly connected to the bottom surface of the crossbeam of the column 3; the bottom ends of the plurality of lifting hydraulic cylinders 17 are fixedly connected to a transverse slide rail 18; the bottom surface of the automatic slider of the transverse slide rail 18 is fixedly connected to a longitudinal slide rail 19; the bottom surface of the automatic slider of the longitudinal slide rail 19 is fixedly connected to the top surface of the rack 5; the lifting hydraulic cylinders 17 drive the transverse slide rail 18 and the longitudinal slide rail 19 to be lifted and lowered, thereby driving the marking component to be lifted and lowered; the automatic slider of the transverse slide rail 18 drives the longitudinal slide rail 19 to move transversely, thereby driving the marking component to move transversely; the automatic slider of the longitudinal slide rail 19 drives the marking component to move longitudinally; thereby realizing that the marking component can be moved to the defective position of the display screen for marking.

[0048] like Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, a plurality of supports 20 are evenly arranged on the top of the circular conveyor 1; a pair of brackets 21 are fixedly connected to both sides of the top surface of the support 20; a plurality of conveying rollers 22 are rotatably installed between each pair of the brackets 21; a No. 1 synchronous wheel 23 is fixedly connected to the outer ring of one end of the conveying roller 22 away from the middle of the support 20; a No. 1 synchronous belt 24 is sleeved on the outer ring of the plurality of No. 1 synchronous wheels 23; a No. 2 synchronous wheel 25 is fixedly connected to the outer ring of one end of the conveying roller 22 close to the end of the bracket 21 away from the middle of the support 20; a No. 2 motor 26 is fixedly connected to the bottom of both sides of the support 20, and a No. 2 synchronous wheel 25 is also fixedly connected to the outer ring of the rotating shaft of the No. 2 motor 26; the outer rings of the two No. 2 synchronous wheels 25 are sleeved with No. 2 synchronous belts 27;

[0049] During operation, the produced display screen is placed on the top of the support platform 20, and multiple conveyor rollers 22 on both sides of the top of the support platform 20 lift the display screen; when the display screen is unloaded after the inspection is completed, the No. 2 motor 26 drives the No. 2 synchronous wheel 25 to rotate, and through the transmission of the No. 2 synchronous belt 27, drives a conveyor roller 22 to rotate, and then through the transmission of the No. 1 synchronous wheel 23 and the No. 1 synchronous belt 24, multiple conveyor rollers 22 rotate synchronously, and multiple conveyor rollers 22 on both sides rotate, driving the display screen to move out from the top of the support platform 20 for unloading; thereby realizing the unloading of the display screen.

[0050] like Figure 8As shown, the outer ring of the conveying roller 22 is evenly fixed with a plurality of rubber rings 28 ; the rubber rings 28 arranged on the outer ring of the conveying roller 22 not only play a buffering role for the display screen, but also reduce the slipping of the conveying roller 22 when conveying the display screen.

[0051] like Figure 6 , Figure 7 and Fig.11 As shown, baffles 29 are bolted on both sides of the side of the support platform 20 close to the column 3; storage grooves 30 are provided in the middle of both sides of the support platform 20; a horizontal push hydraulic cylinder 31 is fixedly connected inside the storage groove 30; a rotating plate 32 is hinged at the bottom of both sides of the side of the support platform 20 close to the column 3; a sliding groove 33 is provided in the middle of the rotating plate 32; a slider 34 is fixedly connected to the end of the horizontal 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 convex strips are evenly fixedly connected to the side of the rotating plate 32 close to the support platform 20;

[0052] During operation, when the produced display screen is placed on the top of the support 20, the end face of the display screen contacts the baffle 29; at the same time, the push hydraulic cylinders 31 on both sides contract synchronously, driving the slider 34 to slide inside the slide groove 33 of the rotating plate 32, driving the rotating plate 32 to rotate toward the support 20, and the rotating plate 32 pushes the display screen to move toward the middle of the support 20, so that the display is fixed in the middle of the support 20, which is beneficial to the subsequent detection and marking of the display screen and improves the accuracy of detection and marking.

[0053] like Figure 6 , Figure 7 , Fig. 9 and Fig.10 As shown, a mounting groove 35 is provided in the middle of the top surface of the support platform 20; a fixing seat 36 is fixedly connected inside the mounting groove 35; an inner cavity 37 is provided inside the fixing seat 36; a plurality of negative pressure grooves 38 are evenly provided on the top surface of the fixing seat 36; an air hole 39 is provided between the inner cavity 37 and the negative pressure grooves 38; an air pump 40 is provided at one end of the fixing seat 36; the air pump 40 is connected with the inner cavity 37; a frame-shaped rubber sealing strip 41 is fixedly connected 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;

[0054] During operation, after the display screen moves to the middle of the support platform 20, the bottom surface of the display screen contacts the rubber sealing strip 41 on the top surface of the fixing seat 36. At this time, the air pump 40 extracts the internal air from the inner cavity 37, and then the air inside the negative pressure groove 38 is extracted through the air hole 39, so that negative pressure is formed inside the negative pressure groove 38, so that the display screen is adsorbed on the top of the fixing seat 36, thereby reducing the displacement and shaking of the display screen during transportation;

[0055] The rubber sealing strip 41 not only improves the sealing performance between the negative pressure groove 38 and the display screen, but also provides a buffer for the display screen.

[0056] like Figure 7 and Fig.12 As shown, support rollers 42 are rotatably installed on both sides of the bottom of the support platform 20; the outer periphery of the support roller 42 is in sliding contact with the top surface of the ring conveyor 1; a pair of convex rings 43 are bolted to the outer periphery of the support roller 42; the side walls of the convex rings 43 are in sliding contact with the inner wall of the top surface of the ring conveyor 1; through the sliding contact between the support roller 42 and the top surface of the ring conveyor 1, the side walls of the convex rings 43 are in sliding contact with the inner wall of the top surface of the ring conveyor 1, thereby improving the stability of the support platform 20 when it moves on the top surface of the ring conveyor 1.

[0057] Working principle: the produced display screen is placed on the top of the support platform 20, and the multiple conveying rollers 22 on both sides of the top of the support platform 20 lift the display screen, so that the end face of the display screen contacts the baffle 29; at the same time, the horizontal push hydraulic cylinders 31 on both sides shrink synchronously, driving the slider 34 to slide inside the slide groove 33 of the rotating plate 32, driving the rotating plate 32 to rotate toward the support platform 20, and the rotating plate 32 pushes the display screen to move toward the middle of the support platform 20; the bottom surface of the display screen contacts the rubber sealing strip 41 on the top surface of the fixed seat 36, at this time, the air pump 40 and the internal air of the inner cavity 37 are extracted, and then through the connection of the air hole 39, the air inside the negative pressure groove 38 is extracted, so that the inside of the negative pressure groove 38 forms a negative pressure, so that the display screen is adsorbed on the top of the fixed seat 36;

[0058] The display screen is transported by the circular conveyor 1 to the bottom of the crossbeam of the column 3, and the optical probe 4 on the column 3 takes an image of the display screen for optical inspection;

[0059] When no defects are detected on the display screen, the circular conveyor 1 conveys the display screen after the inspection to the good product outlet of the circular conveyor 1 for unloading; the second motor 26 drives the second synchronous wheel 25 to rotate, and through the transmission of the second synchronous belt 27, drives a conveying roller 22 to rotate, and then through the transmission of the first synchronous wheel 23 and the first synchronous belt 24, multiple conveying rollers 22 rotate synchronously, and multiple conveying rollers 22 on both sides rotate, driving the display screen to move out from the top of the support platform 20 for unloading;

[0060] When a defect is detected on the display screen, the No. 1 motor 11 drives a rotating rod 10 located on the top of the material rack 5 to rotate, and drives the winding drum 6 to rotate, and rolls the used marking tape 8 onto 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 material rack 5; because the bottom of the trapezoidal block 12 is blocked by the marking tape 8, the elastic force of the spring 13 makes the trapezoidal block 12 have a tendency to move downward away from the material rack 5, and the trapezoidal block 12 is pushed 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 is located on the bottom surface of the trapezoidal block 12 in a flat state;

[0061] The lifting hydraulic cylinder 17 drives the transverse slide rail 18 and the longitudinal slide rail 19 to be lifted and lowered, and drives the marking assembly to be lifted and lowered; the automatic slider of the transverse slide rail 18 drives the longitudinal slide rail 19 to move transversely, and drives the marking assembly to move transversely; the automatic slider of the longitudinal slide rail 19 drives the marking assembly to move longitudinally; the lifting hydraulic cylinder 17 pushes the material rack 5 to descend in height, so that a marking patch 9 located at the bottom of the material rack 5 is attached to the defective position of the display screen for marking, and the adsorption groove 16 on the marking patch 9 is squeezed, so that a sealed negative pressure environment is formed between the adsorption groove 16 of the marking patch 9 and the display screen, and the marking patch 9 is sucked onto the display screen by negative pressure suction, which not only makes it convenient for the staff to remove the marking patch 9, but also reduces the damage to the display screen;

[0062] Finally, the circular conveyor 1 conveys the display screen after defect marking to the defective product outlet of the circular conveyor 1 for unloading; by accurately marking the defect position of the display screen, it is convenient for subsequent re-inspection personnel to detect and reduce the misdetection and missed detection of display screen defects.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An optical detection device for display screen defects, comprising an annular conveyor (1); a display screen is conveyed on the annular conveyor (1); a column (3) is arranged in the middle of the annular 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 annular conveyor (1); a plurality of optical probes (4) are arranged on both sides of the crossbeam of the column (3); the characteristics are: A moving component is arranged at the bottom of the crossbeam of the upright column (3); a marking component is arranged at the bottom of the moving component; The marking component comprises a material rack (5) arranged at the bottom of the moving component; a winding drum (6) and an unwinding drum (7) are arranged in sequence from top to bottom inside the material rack (5); a marking tape (8) is wound on the winding drum (6) and the unwinding drum (7); the marking tape (8) slides around the bottom of the material rack (5); and a marking patch (9) is evenly pasted on the middle of the outer side surface of the marking tape (8).

2. The optical detection device for display screen defects according to claim 1, characterized in that: Two rotating rods (10) are rotatably mounted in the middle of the material rack (5); the winding drum (6) is sleeved on the outer ring of the rotating rod (10) at the top; the unwinding drum (7) is sleeved on the outer ring of the rotating rod (10) at the bottom; 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 rotating rod (10) at the top.

3. The optical detection device for display screen defects according to claim 1, characterized in that: A trapezoidal block (12) is provided at the bottom of the material rack (5); the bottom surface of the trapezoidal block (12) is a horizontal plane, and the bottom surface width of the trapezoidal block (12) is greater than the diameter of the marking patch (9); a plurality of springs (13) are fixedly connected between the top surface of the trapezoidal block (12) and the bottom surface of the material rack (5); the marking belt (8) is in sliding contact with the bottom surface of the trapezoidal block (12); rollers (14) are rotatably installed on both sides of the top of the trapezoidal block (12); the marking belt (8) is in sliding contact with the rollers (14).

4. The optical detection device for display screen defects according to claim 1, characterized in that: The outer side surface of the marking tape (8) is a smooth surface; the inner side surface of the marking tape (8) is evenly provided with a plurality of grooves (15); the marking patch (9) is made of a silicone material; the side of the marking patch (9) close to the marking tape (8) is coated with glue; and the side of the marking patch (9) away from the marking tape (8) is provided with an adsorption groove (16).

5. The optical detection device for display screen defects according to claim 1, characterized in that: The moving assembly comprises a plurality of lifting hydraulic cylinders (17) fixedly connected to the bottom surface of the crossbeam of the column (3); the bottom ends of the plurality of lifting hydraulic cylinders (17) are fixedly connected to a transverse slide rail (18); the bottom surface of the automatic slide block of the transverse slide rail (18) is fixedly connected to a longitudinal slide rail (19); the bottom surface of the automatic slide block of the longitudinal slide rail (19) is fixedly connected to the top surface of the material rack (5).

6. The optical detection device for display screen defects according to claim 1, characterized in that: A plurality of supports (20) are evenly arranged on the top of the circular conveyor (1); a pair of brackets (21) are fixedly connected to both sides of the top surface of the support (20); a plurality of conveying rollers (22) are rotatably installed between each pair of the brackets (21); the outer ring of one end of the conveying roller (22) away from the middle of the support (20) is fixedly connected to a No. 1 synchronous wheel (23); the outer rings of the plurality of No. 1 synchronous wheels (23) are sleeved with a No. 1 synchronous belt (24); the outer ring of one end of the conveying roller (22) away from the middle of the support (20) near the end of the bracket (21) is fixedly connected to a No. 2 synchronous wheel (25); the bottom of both sides of the support (20) is fixedly connected to a No. 2 motor (26), and the outer ring of the rotating shaft of the No. 2 motor (26) is also fixedly connected to a No. 2 synchronous wheel (25); the outer rings of the two No. 2 synchronous wheels (25) are sleeved with a No. 2 synchronous belt (27).

7. The optical detection device for display screen defects according to claim 6, characterized in that: The outer ring of the conveying roller (22) is evenly fixed with a plurality of rubber rings (28).

8. The optical detection device for display screen defects according to claim 6, characterized in that: Baffles (29) are bolted to both sides of the side of the support platform (20) close to the column (3); storage grooves (30) are provided in the middle of both sides of the support platform (20); a horizontal push hydraulic cylinder (31) is fixedly connected inside the storage groove (30); a rotating plate (32) is hinged at the bottom of both sides of the side of the support platform (20) close to the column (3); a sliding groove (33) is provided in the middle of the rotating plate (32); a sliding block (34) is fixedly connected to the end of the horizontal push hydraulic cylinder (31) away from the storage groove (30); the sliding block (34) is slidably arranged inside the sliding groove (33); a plurality of rubber convex strips are evenly fixedly connected to the side of the rotating plate (32) close to the support platform (20).

9. The optical detection device for display screen defects according to claim 6, characterized in that: A mounting groove (35) is provided in the middle of the top surface of the support platform (20); a fixing seat (36) is fixedly connected inside the mounting groove (35); an inner cavity (37) is provided inside the fixing seat (36); a plurality of negative pressure grooves (38) are evenly provided on the top surface of the fixing seat (36); an air hole (39) is provided between the inner cavity (37) and the negative pressure grooves (38); an air pump (40) is provided at one end of the fixing seat (36); the air pump (40) is connected with the inner cavity (37); a frame-shaped rubber sealing strip (41) is fixedly connected 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).

10. The optical detection device for display screen defects according to claim 6, 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 roller (42) is in sliding contact with the top surface of the ring conveyor (1); a pair of convex rings (43) are bolted to the outer periphery of the support roller (42); the side walls of the convex rings (43) are in sliding contact with the inner wall of the top surface of the ring conveyor (1).

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