Liquid crystal display screen detection device and method

Abstract

The invention relates to the technical field of liquid crystal display screens, and discloses a liquid crystal display screen detection device and method.The liquid crystal display screen detection device comprises a base frame, a first conveying assembly, a second conveying assembly, a qualified product discharging frame, a repair discharging frame, a detection piece and a movement resisting assembly; the first conveying assembly and the second conveying assembly are both installed on the base frame and both used for conveying display screens, the first conveying assembly is located on the upper side of the second conveying assembly, the discharging end of the first conveying assembly is opposite to the qualified product discharging frame, and the discharging end of the second conveying assembly is opposite to the repair discharging frame; the detection piece is installed on the base frame and located on the upper side of the first conveying assembly. The accuracy of the detection result can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal display screens, in particular to a liquid crystal display screen detection device and method. BACKGROUND

[0002] Liquid crystal display screens, as a kind of display, are widely used in the screen display of televisions and computers. Liquid crystal display screens need to be detected during production to determine whether the display screen has defects such as scratches.

[0003] The existing liquid crystal display screen detection device usually detects the display screen by taking pictures through an industrial camera. Referring to the Chinese patent document with publication number CN220121108U, a sensor, a conveyor belt, a pushing mechanism and a detection assembly are disclosed. When the liquid crystal display screen is placed on the conveyor belt, the sensor senses the presence of the liquid crystal display screen above through pressure, the conveyor belt stops conveying, and the detection assembly detects at the same time. If defective products are detected, the cylinder in the pushing mechanism drives the push plate to move, and the defective products are pushed from the conveyor belt to the recycling box.

[0004] Since the position of the sensor is fixed, each batch of liquid crystal display screens stays at the same position. However, the size of different batches of liquid crystal display screens may vary, and the fixed position of the display screen may cause the display screen to deviate from the correct position of the detection assembly, resulting in incomplete image taking of the display screen by the detection assembly. This affects the accuracy of the detection result. SUMMARY

[0005] In order to improve the accuracy of the detection result, the present application provides a liquid crystal display screen detection device.

[0006] In a first aspect, the present application provides a liquid crystal display screen detection device, which adopts the following technical solution: A liquid crystal display screen detection device, comprising a base frame, a first conveying assembly and a second conveying assembly, a qualified discharge rack, a repair discharge rack, a detection piece and a blocking assembly; the first conveying assembly and the second conveying assembly are both installed on the base frame and are both used for conveying display screens, and the first conveying assembly is located above the second conveying assembly, the discharge end of the first conveying assembly is opposite to the qualified discharge rack, and the discharge end of the second conveying assembly is opposite to the repair discharge rack; the detection piece is installed on the base frame and located above the first conveying assembly; The blocking and moving assembly comprises an adjusting rod, an intercepting rod and a switching source; the intercepting rod is capable of being adjusted on the adjusting rod along the conveying direction of the first conveying assembly; the switching source is installed on the base frame and drives the adjusting rod to rotate, so that the intercepting rod on the adjusting rod is switched between the first state and the second state; the first state represents that the intercepting rod enters the path of the first conveying assembly conveying the display screen; the second state represents that the intercepting rod leaves the path of the first conveying assembly conveying the display screen. When the display screen is intercepted by the intercepting rod, the detection member detects the display screen; when the display screen passes the detection, the intercepting rod moves to the second state, and the first conveying assembly conveys the display screen to the qualified discharge rack; when the display screen fails to pass the detection, the first conveying assembly moves to make the display screen fall on the second conveying assembly, and the second conveying assembly conveys the display screen to the repair discharge rack.

[0007] By adopting the above technical solution, the first conveying assembly and the second conveying assembly are arranged to correspond to the qualified and unqualified display screen outputs respectively, so that the automation degree and efficiency of the detection process are improved. The blocking and moving assembly allows the position of the intercepting rod to be adjusted flexibly according to the size of the display screen, so that the relative position of the display screen and the detection member is stable, the problem of incomplete image capture caused by the size change of the display screen is avoided, and the detection accuracy is improved.

[0008] Optionally, the qualified discharge rack and the repair discharge rack are both provided with a conveying belt for conveying the display screen.

[0009] By adopting the above technical solution, the qualified discharge rack and the repair discharge rack are both provided with a conveying belt, so that the display screen can be quickly and orderly transported to the designated position, and the efficiency of the entire detection process is further improved.

[0010] Optionally, the base frame comprises a main frame, a vice frame and a top frame; the vice frame has two groups, and the two groups of vice frames are respectively arranged on the opposite sides of the main frame; and the top frame is arranged on the main frame. The second conveying assembly comprises a main conveying belt conveying on the main frame; the first conveying assembly comprises a supporting member, an extension member and a pushing member; the supporting member has two groups, and the two groups of supporting members are respectively arranged on the two groups of vice frames along the direction perpendicular to the conveying direction of the main conveying belt; The extension member is used to drive the supporting member to move relative to the vice frame, so that the supporting member is switched between the relative supporting position and the disengaging position; the relative supporting position represents that the two groups of supporting members are close to each other, so that the two groups of supporting members are used to support the display screen together; and the disengaging position represents that the two groups of supporting members are away from each other, so that the display screen is disengaged from the supporting members and falls on the main conveying belt; The pushing member is arranged on the top frame and moves along the main conveying belt conveying direction to push the display screen to move along the main conveying belt conveying direction on the supporting member.

[0011] By adopting the above technical scheme, the display screen is pushed to move on the supporting member by the movement of the pushing member. The supporting member is switched between the supporting position and the disengaging position by the telescopic member, so that the supporting member can be kept in the supporting position when the display screen passes the detection, and the display screen is pushed to the qualified discharge frame by the pushing member. When the display screen fails the detection, the supporting member is moved from the supporting position to the disengaging position, so that the display screen falls on the main conveying belt and is conveyed to the repair discharge frame by the main conveying belt.

[0012] Optionally, the supporting member comprises a mounting seat, horizontal rollers and vertical rollers; the mounting seat is driven by the telescopic member, and the mounting seat extends along the main conveying belt conveying direction; the horizontal rollers and the vertical rollers are distributed in multiple along the mounting seat length extension direction, and the horizontal roller axis extends along the horizontal direction and perpendicular to the mounting seat length direction, the horizontal roller is used for supporting the bottom of the display screen, and the vertical roller axis extends along the vertical direction, and the vertical roller is used for supporting the side of the display screen.

[0013] By adopting the above technical scheme, the display screen is abutted and limited by the horizontal roller and the vertical roller, and the horizontal roller and the vertical roller can rotate during the movement of the display screen, so as to reduce the friction between the display screen and the supporting member, and the display screen is not easy to be abraded during the movement.

[0014] Optionally, the supporting member further comprises a diagonal support group, and the diagonal support group is located between each two adjacent horizontal rollers; each diagonal support group comprises multiple guide rollers, and the multiple guide rollers are distributed in sequence along the downward inclined direction; The horizontal rollers on the same mounting seat are connected by a horizontal connecting frame, and the horizontal connecting frame drives the horizontal rollers to move vertically on the mounting seat; the vertical rollers on the same mounting seat are connected by a vertical connecting frame, and the vertical connecting frame drives the vertical rollers to move horizontally on the mounting seat; The telescopic end of the telescopic member slides in the mounting seat along the horizontal roller axis, the telescopic end of the telescopic member is connected with the horizontal connecting frame and the vertical connecting frame by a bracket; the auxiliary frame is provided with a limiting assembly for limiting the mounting seat when the supporting member is in the supporting position, and the telescopic member can drive the bracket to switch between the extended position and the recovered position when the mounting seat is limited in the supporting position; The extended position is characterized in that the lateral roller and the vertical roller are both protruded from the mounting seat, and the lateral roller is higher than all the guide rollers; the recovered position is characterized in that the lateral roller and the vertical roller are both accommodated in the mounting seat, and the highest point of the lateral roller is lower than the upper surface of the lateral roller opposite to itself, and the limiting of the limiting assembly to the mounting seat is released; when the supporting member is driven by the telescopic member to move from the supporting position to the disengaged position, the bracket is first moved from the extended position to the recovered position, and then the bracket drives the supporting member to move to the disengaged position.

[0015] By adopting the above technical scheme, the guide rollers distributed obliquely can support and guide the display screen during the movement of the display screen from the supporting member to the main conveying belt, so as to further protect the display screen.

[0016] Optionally, a first elastic member is connected between the bracket and the mounting seat, and the elastic force of the first elastic member gives the bracket a tendency to move close to the recovered position.

[0017] By adopting the above technical scheme, after the limiting assembly is unlocked to the mounting seat, the bracket can be kept in the recovered position relative to the mounting seat due to the elastic force of the first elastic member.

[0018] Optionally, the limiting assembly comprises a first limiting seat, a second limiting seat and a second elastic member, the first limiting seat is arranged on one side of the sub-bracket close to the other sub-bracket, the second limiting seat is movable on the sub-bracket along the axis of the guide roller, and the second elastic member is connected between the second limiting seat and the sub-bracket, and the elastic force of the second elastic member gives the second limiting seat a tendency to protrude from the sub-bracket. When the supporting member is in the supporting position, the first limiting seat abuts against one side of the mounting seat facing the other sub-bracket, and the second limiting seat abuts against one side of the mounting seat away from the other sub-bracket.

[0019] By adopting the above technical scheme, the first limiting seat and the second limiting seat jointly clamp the mounting seat, so as to limit the mounting seat.

[0020] Optionally, one side of the second limiting seat facing the mounting seat is an abutting surface, the telescopic end of the telescopic member is connected with an abutting rod abutting against the abutting surface, the abutting surface comprises a first inclined surface, a concave surface, a second inclined surface and a convex surface connected in sequence away from the other sub-bracket, the concave surface is parallel to the convex surface and both are parallel to the axis of the lateral roller, the concave surface is farther away from the telescopic end of the telescopic member than the convex surface, the first inclined surface and the second inclined surface are mirror-symmetric along the center line of the concave surface, and the distance between the first inclined surface and the second inclined surface gradually increases towards the telescopic end of the telescopic member. When the abutment rod abuts against the concave surface, the bracket is in the extended position. When the abutment rod abuts against the convex surface after passing the second inclined surface, the bracket moves to the retracted position. At the same time, the abutment rod presses the second limiting seat into the sub-frame, so that the second limiting seat releases its limitation on the mounting seat.

[0021] By adopting the above technical solution, through the cooperation between the abutment rod and the abutment surface, the abutment rod can simultaneously release its restriction on the mounting base when the bracket moves to the retraction position.

[0022] Optionally, the lateral distance between the subframe and the main frame is adjustable.

[0023] By adopting the above technical solution, the device can adapt to displays of different widths, further improving the versatility and adaptability of the equipment.

[0024] Secondly, this application provides a method for testing a liquid crystal display screen, which adopts the following technical solution: A method for testing a liquid crystal display screen includes the following steps: S1, adjust the position of the interceptor bar according to the batch displayed on the screen; S2, the display screen is placed on the first conveyor assembly from the base frame feed end; S3, the first transmission component moves the display screen until the display screen touches the barrier bar; S4, the first transmission component stops transmitting, and at the same time the detection component detects the display screen; S5, when the display screen passes the test, the interceptor switch to the second state, and the first conveyor component moves the display screen to the qualified discharge rack; when the display screen fails the test, the first conveyor component moves relative to the second conveyor component, causing the display screen to fall onto the second conveyor component, and the second conveyor component moves the display screen to the rework discharge rack.

[0025] In summary, this application includes at least one of the following beneficial effects: 1. By adjusting the position of the interceptor bar relative to the adjustment bar, the distance between the interceptor bar and the detection component can be changed. This allows the position of the interceptor bar to be adjusted according to the size of the display screen, making the position of the detection component more accurate when the display screen stops moving due to the interceptor bar. 2. By setting up a first transmission component and a second transmission component, respectively corresponding to the display screen outputs of the pass and fail detections, the automation level of the detection process is improved, manual intervention is reduced, and the diversion efficiency is increased; 3. The combination of horizontal rollers, vertical rollers, and guide rollers reduces the friction between the display screen and the support when the display screen moves on the support, thereby protecting the display screen and preventing wear and tear during transport. Attached Figure Description

[0026] Figure 1 is a structural schematic view of an embodiment of the present application; Figure 2 is a top view of Figure 1 ; Figure 3 is a left view of Figure 1 ; Figure 4 is a structural schematic view of a top frame in an embodiment of the present application; Figure 5 is a structural schematic view of an embodiment of the present application when the support is in a supporting position and the bracket is in an extended position; Figure 6 is a structural schematic view of an embodiment of the present application when the horizontal connecting frame, the vertical connecting frame and the bracket cooperate; Figure 7 is a top view of the structure in Figure 5 ; Figure 8 is a sectional view of A-A in Figure 7 ; Figure 9 is an enlarged structural schematic view of B in Figure 2 ; Figure 10 is a structural schematic view of a second limiting seat in an embodiment of the present application.

[0027] BRIEF DESCRIPTION OF THE DRAWINGS: 1. qualified discharge frame; 2. repair discharge frame; 3. detection piece; 4. blocking assembly; 41. adjusting rod; 42. intercepting rod; 43. switching source; 5. main frame; 51. main support leg; 52. main frame; 6. auxiliary frame; 61. auxiliary support leg; 62. auxiliary frame; 7. top frame; 71. top support leg; 72. top plate; 8. main conveying belt; 9. support; 91. mounting seat; 911. vertical bar portion; 912. horizontal bar portion; 92. horizontal roller; 93. vertical roller; 94. inclined support group; 941. guide roller; 10. telescopic member; 11. pushing member; 111. rotating frame; 112. guide rod; 113. moving rod; 114. pushing rod; 12. horizontal connecting frame; 13. vertical connecting frame; 14. bracket; 15. limiting assembly; 151. first limiting seat; 152. second limiting seat; 153. second elastic member; 16. first elastic member; 17. abutting surface; 171. first inclined surface; 172. concave surface; 173. second inclined surface; 174. convex surface; 18. abutting rod; 19. side plate; 20. movable passage; 21. connecting rod; 22. linkage block; 23. linkage surface; 24. penetrating rod. DETAILED DESCRIPTION

[0028] The present application will be further described below in conjunction with the accompanying drawings. Figure 1 Figure 10 The present application will be further described below in conjunction with the accompanying drawings.​

[0029] The embodiment of the present application discloses a liquid crystal display screen detection device. Referring to Figure 1 、 Figure 2 and Figure 3 , the liquid crystal display screen detection device comprises a base frame, a qualified discharge rack 1, a repair discharge rack 2, and a first conveying assembly, a second conveying assembly, a detection piece 3 and a blocking assembly 4 installed on the base frame. The qualified discharge rack 1 is located at the discharge end of the first conveying assembly, and the repair discharge rack 2 is located at the discharge end of the second conveying assembly. The first conveying assembly is located on the upper side of the second conveying assembly. The display screen is conveyed on the first conveying assembly first, and then stopped moving by the blocking assembly 4, and then the detection piece 3 detects the display screen. The display screen with a passing detection result is sent to the qualified discharge rack 1 by the first conveying assembly, and the display screen with a non-passing detection result is first sent to the second conveying assembly by the first conveying assembly, and then sent to the repair discharge rack 2 by the second conveying assembly.

[0030] The base frame comprises a main frame 5, a sub-frame 6 and a top frame 7. The main frame 5 comprises a main support 51 and a main frame 52. The main support 51 supports the main frame 52. The length extension direction of the main frame 52 is along the horizontal straight line direction, and the length extension direction of the main frame 52 is the feeding direction of the display screen. The sub-frame 6 has two groups. The two groups of sub-frames 6 are respectively located on the opposite sides of the main frame 5 along the width direction of the main frame 5. Each group of sub-frames 6 comprises a sub-support 61 and a sub-frame 62. The sub-support 61 supports the sub-frame 62. The sub-frame 62 is located on the upper side of the main frame 52. The length extension direction of the sub-frame 62 is parallel to the length extension direction of the main frame 52. The two ends of the sub-frame 62 away from each other along the length direction of the sub-frame 62 are both side plates 19 with the plate surface extending along the vertical plane. The top frame 7 comprises a top support 71 and a top plate 72. The top support 71 is installed on the main frame 52. The top support 71 supports the top plate 72 at the top. The top plate 72 is a square plate structure opposite to the main frame 52.

[0031] Referring to Figure 3 and Figure 4, specifically, for the detection member 3 and the blocking assembly 4. The detection member 3 is an industrial camera for taking pictures of the display screen, and is installed on the middle portion of the top plate 72 with the lens facing downward. The detection member 3 is positioned higher than the first conveying assembly and the second conveying assembly.

[0032] When the intercepting rod 42 is in the first state, the intercepting rod 42 extends vertically, and the free end of the intercepting rod 42 enters the path of the display screen conveyed by the first conveying assembly, so as to stop the display screen when the display screen abuts against the intercepting rod 42. The surface of the intercepting rod 42 is provided with a sensor (not shown in the figure), and the sensor is connected to a controller (not shown in the figure) to control the first conveying assembly to stop conveying the display screen when the display screen abuts against the intercepting rod 42. Meanwhile, the controller controls the detection member 3 to take a picture of the display screen for detection, and the detection result is connected to the switching source 43 and the first conveying assembly, so that the switching source 43 and the first conveying assembly make a response.

[0033] When the intercepting rod 42 is in the first state, the intercepting rod 42 extends vertically, and the free end of the intercepting rod 42 enters the path of the display screen conveyed by the first conveying assembly, so as to stop the display screen when the display screen abuts against the intercepting rod 42. The surface of the intercepting rod 42 is provided with a sensor (not shown in the figure), and the sensor is connected to a controller (not shown in the figure) to control the first conveying assembly to stop conveying the display screen when the display screen abuts against the intercepting rod 42. Meanwhile, the controller controls the detection member 3 to take a picture of the display screen for detection, and the detection result is connected to the switching source 43 and the first conveying assembly, so that the switching source 43 and the first conveying assembly make a response.

[0034] Referring to Figure 3 and Figure 5 , for the first conveying assembly and the second conveying assembly. The second conveying assembly includes a main conveying belt 8 extending along the length direction of the main frame 52 and conveying on the main frame 52. The first conveying assembly includes a supporting member 9, an extending member 10 and a pushing member 11. The supporting member 9 has two groups, and the two groups of supporting members 9 are respectively located on the auxiliary frames 62 of the two groups of auxiliary frames 6. The supporting member 9 moves in the corresponding auxiliary frame 62 along the width direction of the main frame 52. The two groups of supporting members 9 are used to jointly support the display screen, and the active channel 20 for the display screen to move along the length direction of the auxiliary frame 62 is formed between the two groups of supporting members 9.

[0035] The telescopic member 10 is a power source capable of extension and retraction; it can be an electric telescopic rod or a cylinder, and in this embodiment, a multi-stage electric telescopic rod is preferred. Each support member 9 corresponds to two telescopic members 10, which are distributed along the length of the sub-frame 62. The base of the telescopic member 10 is mounted on the sub-frame 62, and the telescopic end of the telescopic member 10 is mounted on the support member 9. The telescopic member 10 drives the support member 9 to move along the width of the main frame 52. The pushing member 11 moves along the length of the main frame 52 onto the top plate 72.

[0036] When the telescopic member 10 extends or retracts, it causes the support member 9 to switch between its respective supporting position and disengaged position. Specifically, when the telescopic end of the telescopic member 10 extends, the support member 9 is in the supporting position, at which time the two support members 9 are used to jointly support the display screen. When the telescopic end of the telescopic member 10 retracts, the support member 9 is in the disengaged position, at which time the distance between the two support members 9 is greater than the width of the display screen, thereby causing the display screen supported by the support member 9 to move downwards between the two support members 9.

[0037] When the display screen is conveyed by the first conveyor assembly, the telescopic member 10 drives the support member 9 to move to the support position. The two opposite sides of the display screen are placed on the two sets of support members 9 respectively. The pusher 11 abuts against the end of the display screen away from the base frame discharge end, and moves towards the discharge end to push the display screen onto the support member 9. When the display screen abuts against the interceptor bar 42, the pusher 11 stops moving. When the detection result is passed, the interceptor bar 42 rotates to the second state, and the pusher 11 continues to push the display screen towards the discharge end. When the detection result is failed, the telescopic member 10 drives the support member 9 to move to the disengagement position, causing the display screen to fall from between the two support members 9 onto the main conveyor belt 8.

[0038] Reference Figure 3 and Figure 4 More specifically, the pusher 11 includes a rotating frame 111, a guide rod 112, a moving rod 113, and a push rod 114. The rotating frame 111 is rotatably connected to the lower surface of the top plate 72 via a base. The guide rod 112 is fixed to the rotating frame 111, and the moving rod 113 is rotatably connected to the rotating frame 111. The guide rod 112 and the moving rod 113 are parallel to each other and both parallel to the adjusting rod 41. The outer wall of the moving rod 113 has external threads, and the push rod 114 is threaded onto the outer wall of the moving rod 113 and simultaneously slidably fitted onto the outer wall of the guide rod 112. The top plate 72 is equipped with a first motor whose output end is connected to the guide rod 112, and the rotating frame 111 is equipped with a second motor whose output end is connected to the moving rod 113.

[0039] The first motor drives the rotating frame 111 to rotate by 90°, thereby switching the push rod 114 between horizontal and vertical extension. When the push rod 114 extends vertically, its bottom end enters the movable channel 20. When the push rod 114 extends horizontally, the push member 11 is located above the movable channel 20 and does not interfere with the display screen. The second motor drives the moving rod 113 to rotate, so that the push rod 114 moves axially along the moving rod 113. When the display screen is fed from the feed end of the first conveying assembly, the push rod 114 first moves horizontally to the side of the display screen away from the discharge end of the first conveying assembly, and then moves vertically towards the discharge end, so that the push rod 114 can push the display screen towards the discharge end of the first conveying assembly.

[0040] Reference Figure 5 and Figure 6 For the support member 9, each set of support members 9 includes a mounting base 91, a horizontal roller 92, a vertical roller 93, and an oblique support group 94. The mounting base 91 includes a vertical bar 911 and a horizontal bar 912. The length of both the vertical bar 911 and the horizontal bar 912 extends along the length of the sub-frame 62, and the two ends of the vertical bar 911 and the horizontal bar 912 that are far apart from each other abut against the opposite surfaces of the two side plates 19 in the sub-frame 62. At the same time, the width of the vertical bar 911 extends vertically, and the width of the horizontal bar 912 extends along the width of the main frame 52. The cross-sections of the vertical bar 911 and the horizontal bar 912 together form an L-shape. The horizontal bar 912 has a horizontal connecting frame 12 that moves up and down. There are multiple horizontal rollers 92 that are rotatably connected to the horizontal connecting frame 12. The multiple horizontal rollers 92 are evenly spaced along the length of the horizontal bar 912. The rotation axis of the horizontal rollers 92 is parallel to the width direction of the main frame 52. The bottom of the horizontal connecting frame 12 has a connecting rod 21 that extends along the length of the sub-frame 62.

[0041] The vertical section 911 has a vertical connecting frame 13 that moves along the width direction of the main frame 52. There are multiple vertical rollers 93 that are rotatably connected to the vertical connecting frame 13. The multiple vertical rollers 93 are evenly spaced along the length direction of the vertical section 911, and the rotation axis of the vertical rollers 93 extends vertically.

[0042] An inclined support group 94 is mounted on the horizontal bar 912, and an inclined support group 94 is provided between each pair of adjacent horizontal rollers 92. Each inclined support group 94 includes multiple guide rollers 941, which are rotatably connected to the horizontal bar 912. The rotation axis of the guide rollers 941 is parallel to the length direction of the sub-frame 62. The distribution direction of the multiple guide rollers 941 gradually slopes downward along the direction close to the moving channel 20. The sidewalls of adjacent guide rollers 941 are close to each other, and the guide roller 941 at the bottom is close to the main conveyor belt 8. At the same time, the horizontal rollers 92 are opposite to the two guide rollers 941 furthest from the moving channel 20. Meanwhile, the vertical section 911 moves along the width direction of the main frame 52 with a bracket 14. The bracket 14 is linked with the horizontal connecting frame 12 and the vertical connecting frame 13. The telescopic end of the telescopic member 10 is connected to the bracket 14. The movement of the bracket 14 is used to move the mounting base 91.

[0043] Reference Figure 5 and Figure 6 It should be noted that when the support member 9 is in the supported position, the bracket 14 has an extended position and a retracted position corresponding to itself in the mounting base 91, and the bracket 14 moves between the extended position and the retracted position. Furthermore, the side plate 19 has a limiting component 15 that limits the mounting base 91. During the process of the bracket 14 moving from the extended position to the retracted position, the limiting component 15 limits the mounting base 91 to keep it in the supported position, and when the bracket 14 moves to the retracted position, the limiting component 15 releases the limitation on the mounting base 91.

[0044] Reference Figure 7 and Figure 8 When the bracket 14 is in the extended position relative to the mounting base 91, the telescopic end of the telescopic member 10 is fully extended. At this time, the side of the vertical roller 93 protrudes from the side of the vertical bar 911 facing the movable channel 20, while the upper side of the horizontal roller 92 protrudes upward from the upper surface of the horizontal bar 912. The top of the horizontal roller 92 is higher than the top of any guide roller 941, and the bottom of the vertical roller 93 is close to the end of the horizontal roller 92 away from the movable channel 20. At this time, the distance between the vertical rollers 93 of the two sets of support members 9 is consistent with the width of the display screen. The display screen is placed on the horizontal rollers 92 of the two sets of support members 9. The opposite sides of the display screen abut against the opposite sides of the vertical rollers 93 of the two sets of support members 9, so that when the pusher 11 pushes the display screen to move, the display screen simultaneously drives the horizontal roller 92 and the vertical roller 93 to rotate, thereby reducing the friction between the display screen and the support members 9 and making the display screen less prone to wear during transportation.

[0045] During the process of the bracket 14 moving from the extended position to the retracted position, the telescopic end of the telescopic member 10 moves a certain distance in the retraction direction, the vertical roller 93 moves away from the display screen in the direction away from the display screen, and the horizontal roller 92 drives the display screen to move downward and changes the support of the display screen from the horizontal roller 92 to the guide roller 941.

[0046] After the bracket 14 is in the retracted position, the telescopic end of the telescopic component 10 continues to retract. At this time, the bracket 14 drives the mounting base 91 to move away from the moving channel 20 until it is disengaged, while the display screen is guided by the guide roller 941 and gradually moves downward to the main conveyor belt 8.

[0047] The mounting base 91 is equipped with a first elastic element 16 that connects the bracket 14 and the mounting base 91. The first elastic element 16 is a spring. When the bracket 14 is in the retracted position, the first elastic element 16 is in a stretched state. Therefore, the elastic force of the first elastic element 16 gives the bracket 14 a tendency to move closer to the retracted position.

[0048] Reference Figure 5 , Figure 9 and Figure 10 The limiting assembly 15 includes a first limiting seat 151, a second limiting seat 152, and a second elastic member 153. The first limiting seat 151 is fixedly connected to the side plate 19. The second limiting seat 152 is an elongated strip extending along the width direction of the sub-frame 62, and moves along the length direction of the sub-frame 62 within the side plate 19. The second elastic member 153 is connected between the second limiting seat 152 and the side plate 19. The second elastic member 153 is a spring, and its elastic force gives the second limiting seat 152 a tendency to move away from the side plate 19 towards the mounting base 91. When the mounting base 91 is in the supported position, the side of the vertical strip 911 closest to the movable channel 20 abuts against the first limiting seat 151, and the side of the vertical strip 911 away from the movable channel 20 abuts against the end of the second limiting seat 152 closest to the movable channel 20.

[0049] The side of the second limiting seat 152 facing away from the second elastic member 153 is the abutment surface 17. The abutment surface 17 includes, in sequence, a first inclined surface 171, a concave surface 172, a second inclined surface 173, and a convex surface 174 along the width direction of the sub-frame 62 and away from the movable channel 20. The first inclined surface 171 extends towards the second elastic member 153 along the direction away from the movable channel 20, and the second inclined surface 173 extends away from the second elastic member 153 along the direction away from the movable channel 20. The concave surface 172 and the convex surface 174 are parallel to each other and both are parallel to the width direction of the sub-frame 62. The first inclined surface 171 and the second inclined surface 173 are mirror-symmetrical along the center line of the concave surface 172.

[0050] The telescopic end of the telescopic component 10 is fixedly connected to a stop rod 18 that simultaneously abuts against the abutment surface 17. During the telescopic process of the telescopic component 10, the stop rod 18 always abuts against the abutment surface 17. Specifically, when the telescopic end of the telescopic component 10 is fully extended and the mounting base 91 is jointly limited by the first limiting seat 151 and the second limiting seat 152, the stop rod 18 abuts against the concave surface 172, and the concave surface 172 is flush with the surface of the side plate 19. During the process of the telescopic end of the telescopic component 10 driving the bracket 14 to move from the extended position to the retracted position, the stop rod 18 moves from the concave surface 172 to the convex surface 174 through the second inclined surface 173, and the stop rod 18 completely presses the second limiting seat 152 into the side plate 19, thereby releasing the limitation of the second limiting seat 152 on the mounting base 91. After the second limiting seat 152 is released, the telescopic end of the telescopic member 10 continues to retract to drive the mounting seat 91 to move away from the active channel 20, and the abutment 18 slides on the convex surface 174.

[0051] Reference Figure 6 and Figure 8 It should be noted that, in order to enable the horizontal connecting frame 12 and the vertical connecting frame 13 to move when the bracket 14 moves between the extended position and the retracted position, the bracket 14 is fixed to the vertical connecting frame 13, and the bracket 14 has a linkage block 22 that abuts against the connecting rod 21 in the horizontal connecting frame 12. The linkage block 22 moves in the horizontal bar portion 912 as the bracket 14 moves. The linkage block 22 abuts against the connecting rod 21 through the linkage surface 23, which gradually tilts downward along the direction close to the movable channel 20. When the bracket 14 moves towards the movable channel 20 to the extended position, the linkage surface 23 pushes the horizontal connecting frame 12 and the horizontal roller 92 upward; when the bracket 14 moves away from the movable channel 20 to the retracted position, the horizontal connecting frame 12, the horizontal roller 92, and the display screen move downward by their own gravity.

[0052] Reference Figure 3 Furthermore, to improve the device's adaptability to display screen size, the auxiliary support leg 61 has casters at its bottom, and a through rod 24 is fixed to the auxiliary support leg 61, which slides through the main support leg 51 along the width direction of the main frame 52. Two nuts are threaded onto the through rod 24, which respectively abut against opposite sides of the main support leg 51. By adjusting the distance between the auxiliary support leg 61 and the main support leg 51, the distance between the two support members 9 can be adjusted.

[0053] Reference Figure 1 and Figure 2 Furthermore, the qualified discharge rack 1 has a conveyor belt with its upper surface flush with the upper surface of the transverse roller 92, and the rework discharge rack 2 has a conveyor belt with its upper surface flush with the main conveyor belt 8, so that qualified and reworked displays can be conveyed to the next work station that needs to be processed.

[0054] This application also discloses a method for detecting a liquid crystal display screen, including the following steps: S1. Adjust the position of the interceptor bar 42 according to the size of the display screen in this batch, so that the distance from the interceptor bar 42 to the detection piece 3 is half the length of the display screen; S2, the display screen is placed on the two sets of support members 9 from the base frame feeding end, and the push rod 114 is moved to be opposite the end of the display screen that is away from the qualified discharge rack 1; S3, the push rod 114 pushes the display screen to move closer to the qualified discharge rack 1, and the display screen drives the horizontal roller 92 and the vertical roller 93 to rotate until the end of the display screen close to the qualified discharge rack 1 abuts against the intercepting rod 42; S4, push rod 114 stops moving, and detection component 3 takes a picture of the display screen for inspection; S5, when the display screen passes the test, the interceptor 42 switches to the second state, and the pusher 114 continues to push the display screen towards the qualified discharge rack 1 and onto the conveyor belt of the qualified discharge rack 1; when the display screen fails the test, the telescopic part 10 retracts, first driving the horizontal roller 92 and the vertical roller 93 away from the display screen, so that the display screen is supported by the guide roller 941, and then the mounting bases 91 of the two sets of support parts 9 move away from each other, so that the display screen moves downward to the main conveyor belt 8 under the guidance of the guide roller 941, and then the display screen is transported to the conveyor belt of the rework discharge rack 2 by the main conveyor belt 8.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A liquid crystal display screen testing device, characterized in that, include: The system comprises a base frame, a first conveying assembly and a second conveying assembly, a qualified discharge rack (1), a rework discharge rack (2), an inspection component (3), and a blocking assembly (4). The first conveying assembly and the second conveying assembly are both mounted on the base frame and are used to convey the display screen. The first conveying assembly is located above the second conveying assembly. The discharge end of the first conveying assembly is opposite to the qualified discharge rack (1), and the discharge end of the second conveying assembly is opposite to the rework discharge rack (2). The inspection component (3) is mounted on the base frame and is located above the first conveying assembly. The blocking component (4) includes an adjusting rod (41), an intercepting rod (42), and a switching source (43); the intercepting rod (42) is adjustable on the adjusting rod (41) along the conveying direction of the first conveying component, and the switching source (43) is mounted on the base frame and drives the adjusting rod (41) to rotate, so that the intercepting rod (42) on the adjusting rod (41) switches between the first state and the second state; the first state is characterized by the intercepting rod (42) entering the path of the first conveying component conveying the display screen, and the second state is characterized by the intercepting rod (42) leaving the path of the first conveying component conveying the display screen; When the display screen is blocked by the intercepting bar (42), the detection component (3) detects the display screen. When the display screen passes the detection, the intercepting bar (42) moves to the second state, and the first conveying component conveys the display screen to the qualified discharge rack (1). When the display screen fails the test, the first conveying component moves to drop the display screen onto the second conveying component, and the second conveying component conveys the display screen to the rework discharge rack (2).

2. The liquid crystal display screen testing device according to claim 1, characterized in that: Both the qualified discharge rack (1) and the rework discharge rack (2) are equipped with conveyor belts for transporting displays.

3. The liquid crystal display screen testing device according to claim 1, characterized in that: The base frame includes a main frame (5), a sub-frame (6) and a top frame (7); the sub-frame (6) has two sets, and the two sets of sub-frames (6) are respectively erected on opposite sides of the main frame (5), and the top frame (7) is erected on the main frame (5); The second conveying assembly includes a main conveyor belt (8) conveyed on the main frame (5); the first conveying assembly includes a support member (9), a telescopic member (10), and a pusher member (11); the support member (9) has two sets, and the two sets of support members (9) move on the two sets of sub-frames (6) respectively along the conveying direction perpendicular to the main conveyor belt (8); The telescopic component (10) is used to drive the support component (9) to move relative to the subframe (6), so that the support component (9) switches between its own supporting position and disengaged position; the supporting position is characterized by the two sets of support components (9) approaching each other, at which time the two sets of support components (9) are used to jointly support the display screen; the disengaged position is characterized by the two sets of support components (9) moving away from each other, so that the display screen is disengaged from the support component (9) and falls onto the main conveyor belt (8); The pusher (11) moves on the top frame (7) along the conveying direction of the main conveyor belt (8) to push the display screen on the support (9) to move along the conveying direction of the main conveyor belt (8).

4. The liquid crystal display screen testing device according to claim 3, characterized in that: The support member (9) includes a mounting base (91), a horizontal roller (92), and a vertical roller (93); the mounting base (91) is driven by the telescopic member (10), and the mounting base (91) extends along the conveying direction of the main conveyor belt (8); multiple horizontal rollers (92) and vertical rollers (93) are distributed along the length extension direction of the mounting base (91), and the axis of the horizontal roller (92) extends horizontally and perpendicular to the length direction of the mounting base (91). The horizontal roller (92) is used to support the bottom of the display screen, and the axis of the vertical roller (93) extends vertically. The vertical roller (93) is used to support the side of the display screen.

5. The liquid crystal display screen testing device according to claim 4, characterized in that: The support member (9) further includes an inclined support group (94), which is located between each pair of adjacent transverse rollers (92). Each inclined support group (94) includes multiple guide rollers (941), which are distributed sequentially along the downward inclined direction. The transverse rollers (92) on the same mounting base (91) are connected by a transverse connecting frame (12), and the transverse connecting frame (12) drives the transverse rollers (92) to move vertically on the mounting base (91); the vertical rollers (93) on the same mounting base (91) are connected by a vertical connecting frame (13), and the vertical connecting frame (13) drives the vertical rollers (93) to move horizontally on the mounting base (91); The telescopic end of the telescopic member (10) slides axially along the transverse roller (92) in the mounting base (91). The telescopic end of the telescopic member (10) is connected to both the transverse connecting frame (12) and the vertical connecting frame (13) through the bracket (14). The sub-frame (6) has a limiting component (15) that limits the mounting base (91) when the support member (9) is in the supporting position. When the mounting base (91) is limited to the supporting position, the telescopic member (10) can drive the bracket (14) to switch between the extended position and the retracted position. The extended position is characterized by both the horizontal roller (92) and the vertical roller (93) protruding from the mounting base (91), and the horizontal roller (92) being higher than all the guide rollers (941); the retracted position is characterized by both the horizontal roller (92) and the vertical roller (93) being housed in the mounting base (91), and the highest point of the horizontal roller (92) being lower than the upper surface of the horizontal roller (92) opposite to itself, and the limiting component (15) releasing the limiting of the mounting base (91); when the telescopic member (10) drives the support member (9) to move from the supporting position to the disengaged position, the bracket (14) first moves from the extended position to the retracted position, and then the bracket (14) drives the support member (9) to move to the disengaged position.

6. The liquid crystal display screen testing device according to claim 5, characterized in that: A first elastic element (16) is connected between the bracket (14) and the mounting base (91), and the elastic force of the first elastic element (16) gives the bracket (14) a tendency to move closer to the recycling position.

7. The liquid crystal display screen testing device according to claim 5, characterized in that: The limiting component (15) includes a first limiting seat (151), a second limiting seat (152), and a second elastic member (153). The first limiting seat (151) is disposed on the side of the sub-frame (6) near the other sub-frame (6). The second limiting seat (152) moves along the axis of the guide roller (941) on the sub-frame (6), and the second elastic member (153) is connected between the second limiting seat (152) and the sub-frame (6). The elastic force of the second elastic member (153) gives the second limiting seat (152) a tendency to extend out of the sub-frame (6). When the support member (9) is in the support position, the first limiting seat (151) abuts against the side of the mounting seat (91) facing the other sub-frame (6), and the second limiting seat (152) abuts against the side of the mounting seat (91) away from the other sub-frame (6).

8. A liquid crystal display screen testing device according to claim 7, characterized in that: The side of the second limiting seat (152) facing the mounting seat (91) is the abutment surface (17). The telescopic end of the telescopic member (10) is connected to a stop rod (18) that abuts against the abutment surface (17). The abutment surface (17) includes a first inclined surface (171), a concave surface (172), a second inclined surface (173), and a convex surface (174) connected in sequence along the direction away from the other sub-frame (6). The concave surface (172) is parallel to the convex surface (174) and is also parallel to the axial direction of the transverse roller (92). The concave surface (172) is further away from the telescopic end of the telescopic member (10) than the convex surface (174). The first inclined surface (171) and the second inclined surface (173) are mirror symmetrical along the center line of the concave surface (172). The distance between the first inclined surface (171) and the second inclined surface (173) gradually increases towards the telescopic end of the telescopic member (10). When the abutment (18) abuts against the concave surface (172), the bracket (14) is in the extended position. When the abutment (18) abuts against the convex surface (174) after passing the second inclined surface (173), the bracket (14) moves to the retracted position. At the same time, the abutment (18) presses the second limiting seat (152) into the sub-frame (6) so that the second limiting seat (152) releases the limiting of the mounting seat (91).

9. A liquid crystal display screen testing device according to claim 3, characterized in that: The lateral distance between the subframe (6) and the main frame (5) is adjustable.

10. A method for testing a liquid crystal display screen, applicable to the liquid crystal display screen testing apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: S1, adjust the position of the interceptor bar (42) according to the batch displayed on the screen; S2, the display screen is placed on the first conveyor assembly from the base frame feed end; S3, the first transmission component moves the display screen until the display screen comes into contact with the interceptor bar (42); S4, the first transmission component stops transmitting, and at the same time the detection component (3) detects the display screen; S5, when the display screen passes the test, the interceptor bar (42) switches to the second state, and the first conveyor component moves the display screen to the qualified discharge rack (1); when the display screen fails the test, the first conveyor component moves relative to the second conveyor component, so that the display screen falls onto the second conveyor component, and the second conveyor component moves the display screen to the rework discharge rack (2).

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